Journal of Science: Advanced Materials and Devices最新文献

Influence of pH and annealing temperature on hematite (α-Fe2O3) nanoparticle synthesis with pine needle extract and investigation of structural, magnetic, and dielectric properties

IF 6.7 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-03-12 DOI: 10.1016/j.jsamd.2025.100876

Kamaran Bakhtiar , Bruska Azhdar

This study used pine needle extract, a green method, to synthesize hematite-phase iron oxide nanoparticles. The structural, magnetic, and dielectric properties of the hematite nanoparticles synthesized at varying pH, or potential hydrogen, conditions and subjected to different annealing temperatures were examined. X-ray diffraction (XRD) was used to confirm the hexagonal hematite crystalline structure and demonstrated a significant variation in crystallite size from 7.28 to 27.36 nm at 500 °C and from 43 to 46 nm at 750 °C for different pH values. Fourier transform infrared spectroscopy (FTIR) indicated the presence of two absorption bands at 465–475 cm⁻¹ and 551–559 cm⁻¹ associated with the bending and stretching of Fe–O. UV–Vis DRS exhibited semiconducting properties, with allowed direct and indirect band gaps reducing from roughly 2.05−2.25 eV at 500 °C to 1.29−1.88 eV at 750 °C, implying a quantum confinement effect. The influence of pH and annealing temperature on the magnetic properties of hematite nanoparticles was also studied with a vibrating sample magnetometer (VSM), revealing variations in saturation magnetization, residual magnetization, and coercivity force. An LCR meter was used to analyze the frequency dependence of the real and imaginary components of the permittivity, dielectric loss tangent, and AC conductivity. The results highlight that synthesis issues, especially pH and annealing temperature, are crucial in modulating the physicochemical features of hematite nanoparticles.

{"title":"Influence of pH and annealing temperature on hematite (α-Fe2O3) nanoparticle synthesis with pine needle extract and investigation of structural, magnetic, and dielectric properties","authors":"Kamaran Bakhtiar , Bruska Azhdar","doi":"10.1016/j.jsamd.2025.100876","DOIUrl":"10.1016/j.jsamd.2025.100876","url":null,"abstract":"<div><div>This study used pine needle extract, a green method, to synthesize hematite-phase iron oxide nanoparticles. The structural, magnetic, and dielectric properties of the hematite nanoparticles synthesized at varying pH, or potential hydrogen, conditions and subjected to different annealing temperatures were examined. X-ray diffraction (XRD) was used to confirm the hexagonal hematite crystalline structure and demonstrated a significant variation in crystallite size from 7.28 to 27.36 nm at 500 °C and from 43 to 46 nm at 750 °C for different pH values. Fourier transform infrared spectroscopy (FTIR) indicated the presence of two absorption bands at 465–475 cm−1 and 551–559 cm−1 associated with the bending and stretching of Fe–O. UV–Vis DRS exhibited semiconducting properties, with allowed direct and indirect band gaps reducing from roughly 2.05−2.25 eV at 500 °C to 1.29−1.88 eV at 750 °C, implying a quantum confinement effect. The influence of pH and annealing temperature on the magnetic properties of hematite nanoparticles was also studied with a vibrating sample magnetometer (VSM), revealing variations in saturation magnetization, residual magnetization, and coercivity force. An LCR meter was used to analyze the frequency dependence of the real and imaginary components of the permittivity, dielectric loss tangent, and AC conductivity. The results highlight that synthesis issues, especially pH and annealing temperature, are crucial in modulating the physicochemical features of hematite nanoparticles.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100876"},"PeriodicalIF":6.7,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multifunctional prospects of physical vapor-deposited silver-based metal-dielectric nanocomposite thin films

IF 6.7 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-02-27 DOI: 10.1016/j.jsamd.2025.100871

Mohammad Nur-E-Alam , Boon Kar Yap , Mohammad Khairul Basher , Mohammad Aminul Islam , M. Khalid Hossain , Manzoore Elahi M. Soudagar , Narottam Das , Mikhail Vasiliev , Tiong Sieh Kiong

Silver-based metallic thin-film nanostructured materials are extensively utilized in advanced technological applications, including sensors, energy-efficient coatings, antibacterial coatings, and optical filters. Physical vapor deposition has emerged as a significant technique for synthesizing silver (Ag)-based nanocomposites, enabling the modification of structural and optical properties of thin metallic films. This advancement facilitates material development and applications in electronics, catalysis, magnetics, optics, environmental and health sectors, and specialized optical coatings. Research has demonstrated the successful integration of various nanomaterials with Ag matrices, resulting in multifunctional thin-film systems. Ag-based nanocomposite thin films exhibit exceptional electrical conductivity, rendering them suitable for electronic and optoelectronic devices. Their unique optical properties enable applications in advanced photonics, spectroscopy, and imaging technologies. These films also demonstrate potential in catalysis, power conversion and storage, environmental remediation, and chemical sensing. The incorporation of antimicrobial agents presents opportunities for biomedical applications. This review aims to comprehensively examine the synthesis, characterization, and potential applications of physically vapor-deposited Ag-based nanocomposite thin films, highlighting their promising future in various fields.

{"title":"Multifunctional prospects of physical vapor-deposited silver-based metal-dielectric nanocomposite thin films","authors":"Mohammad Nur-E-Alam , Boon Kar Yap , Mohammad Khairul Basher , Mohammad Aminul Islam , M. Khalid Hossain , Manzoore Elahi M. Soudagar , Narottam Das , Mikhail Vasiliev , Tiong Sieh Kiong","doi":"10.1016/j.jsamd.2025.100871","DOIUrl":"10.1016/j.jsamd.2025.100871","url":null,"abstract":"<div><div>Silver-based metallic thin-film nanostructured materials are extensively utilized in advanced technological applications, including sensors, energy-efficient coatings, antibacterial coatings, and optical filters. Physical vapor deposition has emerged as a significant technique for synthesizing silver (Ag)-based nanocomposites, enabling the modification of structural and optical properties of thin metallic films. This advancement facilitates material development and applications in electronics, catalysis, magnetics, optics, environmental and health sectors, and specialized optical coatings. Research has demonstrated the successful integration of various nanomaterials with Ag matrices, resulting in multifunctional thin-film systems. Ag-based nanocomposite thin films exhibit exceptional electrical conductivity, rendering them suitable for electronic and optoelectronic devices. Their unique optical properties enable applications in advanced photonics, spectroscopy, and imaging technologies. These films also demonstrate potential in catalysis, power conversion and storage, environmental remediation, and chemical sensing. The incorporation of antimicrobial agents presents opportunities for biomedical applications. This review aims to comprehensively examine the synthesis, characterization, and potential applications of physically vapor-deposited Ag-based nanocomposite thin films, highlighting their promising future in various fields.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100871"},"PeriodicalIF":6.7,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetic and pH-Sensitive dual actuation of biohybrid microswimmer of targeted drug release suitable for cancer cell microenvironment

IF 6.7 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-02-27 DOI: 10.1016/j.jsamd.2025.100873

Richa Chaturvedi , Yumin Kang , Yunji Eom, Sri Ramulu Torati , CheolGi Kim

The chemotherapeutic agents most frequently used in cancer treatment often have limited effectiveness because of their low specificity for tumors and poor therapeutic performance. In addition to the aforementioned therapeutic challenges the drug delivery carriers conjugated with the drug encounter early detection and elimination from the immune system before arriving at the affected area continues to be a significant research focus among researchers. To address this prevalent issue, an effective approach has been developed that leverages the physiological differences between normal and tumor tissue to enhance the efficacy of anticancer drugs. This drug delivery system is designed based on pH-sensitive drug release, ensuring targeted release within cancer cells. In the present study, we have developed a drug carrier called as biohybrid magnetic microswimmer (BMM). The BMM was formed through a three-step process: firstly, bacterial surfaces were functionalized with biotinylated PEG which enables the bacteria to escape the phagocytosis process; secondly, the anticancer drug lenalidomide was PEGylated to enhance solubility; and finally, both complexes were conjugated via streptavidin-biotin interaction. The study investigated bond formation, bacterial viability after drug treatment, pH-dependent release, and cytotoxicity in various cell lines (MCF-7 and THP-1 cells), and the results revealed that the concentration of the drug, released from BMM gradually increased as the pH of the solvent decreased from neutral to acidic, mimicking the surrounding environment of normal cells and cancer cells, respectively, which in turn affects the cancer cell viability negatively. Therefore, BMM shows promise in targeted drug delivery, utilizing magnetic manipulation and pH-triggered release, providing advantages that include bacteria's maneuverability and PEG's stealth properties, enhancing drug efficacy.

{"title":"Magnetic and pH-Sensitive dual actuation of biohybrid microswimmer of targeted drug release suitable for cancer cell microenvironment","authors":"Richa Chaturvedi , Yumin Kang , Yunji Eom, Sri Ramulu Torati , CheolGi Kim","doi":"10.1016/j.jsamd.2025.100873","DOIUrl":"10.1016/j.jsamd.2025.100873","url":null,"abstract":"<div><div>The chemotherapeutic agents most frequently used in cancer treatment often have limited effectiveness because of their low specificity for tumors and poor therapeutic performance. In addition to the aforementioned therapeutic challenges the drug delivery carriers conjugated with the drug encounter early detection and elimination from the immune system before arriving at the affected area continues to be a significant research focus among researchers. To address this prevalent issue, an effective approach has been developed that leverages the physiological differences between normal and tumor tissue to enhance the efficacy of anticancer drugs. This drug delivery system is designed based on pH-sensitive drug release, ensuring targeted release within cancer cells. In the present study, we have developed a drug carrier called as biohybrid magnetic microswimmer (BMM). The BMM was formed through a three-step process: firstly, bacterial surfaces were functionalized with biotinylated PEG which enables the bacteria to escape the phagocytosis process; secondly, the anticancer drug lenalidomide was PEGylated to enhance solubility; and finally, both complexes were conjugated via streptavidin-biotin interaction. The study investigated bond formation, bacterial viability after drug treatment, pH-dependent release, and cytotoxicity in various cell lines (MCF-7 and THP-1 cells), and the results revealed that the concentration of the drug, released from BMM gradually increased as the pH of the solvent decreased from neutral to acidic, mimicking the surrounding environment of normal cells and cancer cells, respectively, which in turn affects the cancer cell viability negatively. Therefore, BMM shows promise in targeted drug delivery, utilizing magnetic manipulation and pH-triggered release, providing advantages that include bacteria's maneuverability and PEG's stealth properties, enhancing drug efficacy.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100873"},"PeriodicalIF":6.7,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corona triode poling of P(VDF-TrFE) nanofibers: Mechanisms and optimization strategies

IF 6.7 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-02-25 DOI: 10.1016/j.jsamd.2025.100870

Leonardo Gasperini, Giacomo Selleri, Davide Pegoraro, Daniele Mariani, Alberto Rumi, Paolo Seri, Davide Fabiani

The effectiveness of the poling process of poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) nanofibers is essential for their use in engineering applications (i.e., artificial piezoelectric skins, self-sensing composite materials). While traditional contact poling methods present electrical breakdown risks through the highly porous nanofibrous membranes, the corona poling technique offers a non-contact alternative, utilizing ion generation to polarize piezoelectric materials without direct interaction between the high-voltage electrode and the sample. The corona poling process is well-established for P(VDF-TrFE) thin films, but literature lacks a reliable methodology for P(VDF-TrFE) nanofibers. This study addresses this gap by systematically investigating the differences between the corona poling of P(VDF-TrFE) films and nanofibers and aims to disclose the distinct physical mechanisms involved. First, the corona triode setup is optimized for P(VDF-TrFE) films, achieving a piezoelectric strain coefficient

d_{33}

of 23 pC N⁻¹. The parameters of the corona setup are then methodically recalibrated for the nanofiber's polarization, with the rationale behind these adjustments discussed and validated through experimental investigations. Such a refined corona poling method leads to a

d_{33}

equal to −20.8 pC N⁻¹ for the nanofibers, contemporary allowing for a comprehensive understanding of the physical mechanisms behind the two distinct methods.

{"title":"Corona triode poling of P(VDF-TrFE) nanofibers: Mechanisms and optimization strategies","authors":"Leonardo Gasperini, Giacomo Selleri, Davide Pegoraro, Daniele Mariani, Alberto Rumi, Paolo Seri, Davide Fabiani","doi":"10.1016/j.jsamd.2025.100870","DOIUrl":"10.1016/j.jsamd.2025.100870","url":null,"abstract":"<div><div>The effectiveness of the poling process of poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) nanofibers is essential for their use in engineering applications (i.e., artificial piezoelectric skins, self-sensing composite materials). While traditional contact poling methods present electrical breakdown risks through the highly porous nanofibrous membranes, the corona poling technique offers a non-contact alternative, utilizing ion generation to polarize piezoelectric materials without direct interaction between the high-voltage electrode and the sample. The corona poling process is well-established for P(VDF-TrFE) thin films, but literature lacks a reliable methodology for P(VDF-TrFE) nanofibers. This study addresses this gap by systematically investigating the differences between the corona poling of P(VDF-TrFE) films and nanofibers and aims to disclose the distinct physical mechanisms involved. First, the corona triode setup is optimized for P(VDF-TrFE) films, achieving a piezoelectric strain coefficient <math><mrow><msub><mi>d</mi><mn>33</mn></msub></mrow></math> of 23 pC N−1. The parameters of the corona setup are then methodically recalibrated for the nanofiber's polarization, with the rationale behind these adjustments discussed and validated through experimental investigations. Such a refined corona poling method leads to a <math><mrow><msub><mi>d</mi><mn>33</mn></msub></mrow></math> equal to −20.8 pC N−1 for the nanofibers, contemporary allowing for a comprehensive understanding of the physical mechanisms behind the two distinct methods.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100870"},"PeriodicalIF":6.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advanced Braille recognition based on protein biomimetic skin mechanical sensors

IF 6.7 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-02-24 DOI: 10.1016/j.jsamd.2025.100869

Nianfeng Zhang , Ailing Yang , Andeng Liu , Guoxi Shao , Xixi Wang , Yingjin Luo , Zhihua Liu , Yating Shi , Na Li , Wenxi Guo , Wu Qiu , Dapeng Yang

Tactile perception, dominated by human skin, plays an important role in human-nature interaction, especially when visual perception is limited. The key to mimicking skin tactile perception is to address skin-like properties of materials and integration of biomimetic tactile functions. To be competent in bionic skin, composite silk fibroin (SF) films possessing high tensile properties (159.71 %) and hydrogels with elasticity (54.42 %) were prepared through a mesoscopic reconstruction strategy of SF materials, using fish scale gelatin molecules as mesoscopic templates to regulate the nucleation and crystallization kinetics of SF molecules. In addition, inspired by the mechanoreceptors, a bimodal protein bionic skin (BPBS) was prepared by horizontally integrating a single-electrode triboelectric sensor and a capacitive sensing array, which can work in sliding and pressing modes to mimic the sliding touch and pressing touch of the finger, respectively. The system achieves a 99 % Braille recognition accuracy in sliding mode through a deep learning algorithm, and Bluetooth technology enables real-time wireless Braille recognition in pressing mode, synergistically enhancing the robustness and practicality of BPBS. This research provides novel insights into enhancing human touch perception, human-computer interaction, and the advancement of intelligent prosthetics, marking a significant stride in the development of bionic skins with multimodal sensing capabilities.

{"title":"Advanced Braille recognition based on protein biomimetic skin mechanical sensors","authors":"Nianfeng Zhang , Ailing Yang , Andeng Liu , Guoxi Shao , Xixi Wang , Yingjin Luo , Zhihua Liu , Yating Shi , Na Li , Wenxi Guo , Wu Qiu , Dapeng Yang","doi":"10.1016/j.jsamd.2025.100869","DOIUrl":"10.1016/j.jsamd.2025.100869","url":null,"abstract":"<div><div>Tactile perception, dominated by human skin, plays an important role in human-nature interaction, especially when visual perception is limited. The key to mimicking skin tactile perception is to address skin-like properties of materials and integration of biomimetic tactile functions. To be competent in bionic skin, composite silk fibroin (SF) films possessing high tensile properties (159.71 %) and hydrogels with elasticity (54.42 %) were prepared through a mesoscopic reconstruction strategy of SF materials, using fish scale gelatin molecules as mesoscopic templates to regulate the nucleation and crystallization kinetics of SF molecules. In addition, inspired by the mechanoreceptors, a bimodal protein bionic skin (BPBS) was prepared by horizontally integrating a single-electrode triboelectric sensor and a capacitive sensing array, which can work in sliding and pressing modes to mimic the sliding touch and pressing touch of the finger, respectively. The system achieves a 99 % Braille recognition accuracy in sliding mode through a deep learning algorithm, and Bluetooth technology enables real-time wireless Braille recognition in pressing mode, synergistically enhancing the robustness and practicality of BPBS. This research provides novel insights into enhancing human touch perception, human-computer interaction, and the advancement of intelligent prosthetics, marking a significant stride in the development of bionic skins with multimodal sensing capabilities.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100869"},"PeriodicalIF":6.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phase structure, microstructure, and mechanical properties of FeCoCrNi-based eutectic high-entropy alloys reinforced with MWCNTs and Gr

IF 6.7 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-02-22 DOI: 10.1016/j.jsamd.2025.100868

Balaji V , Arivazhagan A , Anthony Xavior M

This study primarily focuses on the phase structure, microstructure, and mechanical behaviour of Fe₂₅Co₂₅Cr₂₅Ni₂₅ equiatomic EHEAs upon adding 2 wt% of Multi-Walled Carbon Nanotubes (MWCNTs) and Graphene (Gr) as reinforcements. The alloying processes include Mechanical Alloying (MA) and Vacuum Arc Melting (VAM). The as-milled MA powder is irregularly shaped, with an average particle size of 23.5 μm. Samples subjected to MA followed by VAM exhibited a single-phase alloy composition, with a near-equal chemical distribution of major Face-Centered Cubic (FCC) and minor Body-Centered Cubic (BCC) crystal structures, as confirmed by X-ray diffraction (XRD) analysis. The Vickers microhardness values of the Fe₂₅Co₂₅Cr₂₅Ni₂₅ EHEAs samples were 123 ± 7 HV, while the additions of MWCNTs and Gr increased the hardness to 146 ± 6 HV and 155 ± 9 HV, respectively. To further enhance the strengthening behaviour, the EHEAs samples were heat-treated in a Nabertherm furnace at 1100 °C under an argon atmosphere, resulting in hardness values of 134 ± 6 HV, 164 ± 8 HV, and 171 ± 7 HV for the base alloy, MWCNTs addition, and Gr addition. Adding MWCNTs and Gr enhances the thermal stability of the as-milled powder, preventing secondary phase formation and improving the alloy stability of the equiatomic Fe₂₅Co₂₅Cr₂₅Ni₂₅ composition. Specifically, Fe₂₅Co₂₅Cr₂₅Ni₂₅ exhibited thermal stability up to 534 °C, while Fe₂₅Co₂₅Cr₂₅Ni₂₅+MWCNTs achieved 612 °C, and Fe₂₅Co₂₅Cr₂₅Ni₂₅+Gr demonstrated thermal stability up to 713 °C, with no mass loss or phase change observed, as revealed by thermogravimetric analysis (TGA). Furthermore, adding 2 wt% graphene resulted in superior hardness, residual compressive stress, and thermal stability compared to the MWCNTs addition.

{"title":"Phase structure, microstructure, and mechanical properties of FeCoCrNi-based eutectic high-entropy alloys reinforced with MWCNTs and Gr","authors":"Balaji V , Arivazhagan A , Anthony Xavior M","doi":"10.1016/j.jsamd.2025.100868","DOIUrl":"10.1016/j.jsamd.2025.100868","url":null,"abstract":"<div><div>This study primarily focuses on the phase structure, microstructure, and mechanical behaviour of Fe25Co25Cr25Ni25 equiatomic EHEAs upon adding 2 wt% of Multi-Walled Carbon Nanotubes (MWCNTs) and Graphene (Gr) as reinforcements. The alloying processes include Mechanical Alloying (MA) and Vacuum Arc Melting (VAM). The as-milled MA powder is irregularly shaped, with an average particle size of 23.5 μm. Samples subjected to MA followed by VAM exhibited a single-phase alloy composition, with a near-equal chemical distribution of major Face-Centered Cubic (FCC) and minor Body-Centered Cubic (BCC) crystal structures, as confirmed by X-ray diffraction (XRD) analysis. The Vickers microhardness values of the Fe25Co25Cr25Ni25 EHEAs samples were 123 ± 7 HV, while the additions of MWCNTs and Gr increased the hardness to 146 ± 6 HV and 155 ± 9 HV, respectively. To further enhance the strengthening behaviour, the EHEAs samples were heat-treated in a Nabertherm furnace at 1100 °C under an argon atmosphere, resulting in hardness values of 134 ± 6 HV, 164 ± 8 HV, and 171 ± 7 HV for the base alloy, MWCNTs addition, and Gr addition. Adding MWCNTs and Gr enhances the thermal stability of the as-milled powder, preventing secondary phase formation and improving the alloy stability of the equiatomic Fe25Co25Cr25Ni25 composition. Specifically, Fe25Co25Cr25Ni25 exhibited thermal stability up to 534 °C, while Fe25Co25Cr25Ni25+MWCNTs achieved 612 °C, and Fe25Co25Cr25Ni25+Gr demonstrated thermal stability up to 713 °C, with no mass loss or phase change observed, as revealed by thermogravimetric analysis (TGA). Furthermore, adding 2 wt% graphene resulted in superior hardness, residual compressive stress, and thermal stability compared to the MWCNTs addition.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100868"},"PeriodicalIF":6.7,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of a recyclable Y2O3-g-C3N4 as an auspicious nanosorbent for removing malachite green dye

IF 6.7 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-02-20 DOI: 10.1016/j.jsamd.2025.100867

Zainab M.H. El-Qahtani , A. Modwi , Hanadi M. AbdelSalam , Tahani M. Albogami , I.A. Osman , Eida S. Al-Farraj , Azizah A. Algreiby

The recent development of industrial and agricultural technology has led to severe environmental damage, most notably water pollution, which poses a serious threat to water security, considering population increases and a decrease in global drinking water sources. In this direction, a nanostructure (Y₂O₃-g-C₃N₄) with a BET surface area of 82.14 m². g⁻¹ was employed for the first time as a novel sorbent to remove malachite green (MG) from the aqueous phase. Besides, the SEM, TEM, and EDX data verified the integration of 14.17 nm Y₂O₃ nanoparticles into the g-C₃N₄ nanosheets. The experimental adsorption results confirmed the best fitting to the well-known Langmuir isotherm equation, achieving q_max = 1297 mg g¹ of MG uptake, and the kinetic model calculations revealed a single-step mechanism involving a pseudo-second-order chemical reaction with a rate constant of 0.00134 mg./mg. min, which accounted for the chemisorption of MG dye on the Y₂O₃-g-C₃N₄ nanostructure sample. Due to its ease of manufacture and ecologically acceptable procedure, the Y₂O₃-g-C₃N₄ nanostructure was recognized as a desirable and promising candidate for eradicating tainted organic dyes. The newly synthesized Y₂O₃-g-C₃N₄ nanostructure with a high surface area demonstrated a short contact time, outstanding removal capacity, five times recyclability, and multiple dyes elimination nominating it a potentially valuable nanosorbent for the adsorption of dyes from wastewater.

{"title":"Design of a recyclable Y2O3-g-C3N4 as an auspicious nanosorbent for removing malachite green dye","authors":"Zainab M.H. El-Qahtani , A. Modwi , Hanadi M. AbdelSalam , Tahani M. Albogami , I.A. Osman , Eida S. Al-Farraj , Azizah A. Algreiby","doi":"10.1016/j.jsamd.2025.100867","DOIUrl":"10.1016/j.jsamd.2025.100867","url":null,"abstract":"<div><div>The recent development of industrial and agricultural technology has led to severe environmental damage, most notably water pollution, which poses a serious threat to water security, considering population increases and a decrease in global drinking water sources. In this direction, a nanostructure (Y2O3-g-C3N4) with a BET surface area of 82.14 m2. g−1 was employed for the first time as a novel sorbent to remove malachite green (MG) from the aqueous phase. Besides, the SEM, TEM, and EDX data verified the integration of 14.17 nm Y2O3 nanoparticles into the g-C3N4 nanosheets. The experimental adsorption results confirmed the best fitting to the well-known Langmuir isotherm equation, achieving qmax = 1297 mg g1 of MG uptake, and the kinetic model calculations revealed a single-step mechanism involving a pseudo-second-order chemical reaction with a rate constant of 0.00134 mg./mg. min, which accounted for the chemisorption of MG dye on the Y2O3-g-C3N4 nanostructure sample. Due to its ease of manufacture and ecologically acceptable procedure, the Y2O3-g-C3N4 nanostructure was recognized as a desirable and promising candidate for eradicating tainted organic dyes. The newly synthesized Y2O3-g-C3N4 nanostructure with a high surface area demonstrated a short contact time, outstanding removal capacity, five times recyclability, and multiple dyes elimination nominating it a potentially valuable nanosorbent for the adsorption of dyes from wastewater.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100867"},"PeriodicalIF":6.7,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel pyrochlores in the Bi2O3–MgO–Ta2O5 (BMT) system: Synthesis optimisation, phase equilibria and dielectric properties

IF 6.7 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-02-19 DOI: 10.1016/j.jsamd.2025.100866

K.B. Tan , P.Y. Tan , Y. Feng , C.C. Khaw , V. Raman , H.C. Ananda Murthy , R. Balachandran , S.K. Chen , O.J. Lee , K.Y. Chan , D. Zhou , M. Lu

Investigating the phase equilibria within the Bi₂O₃–MgO–Ta₂O₅ (BMT) system offers critical insights into the formation and stability of pyrochlore phases. This understanding enables the correlation of dielectric properties with phase equilibria data, facilitating the identification of compositions exhibiting optimal performance. Phase equilibria within the BMT system have been investigated across a temperature range of 800–1025 °C. The layouts of compatible triangles, encompassing two-phase, three-phase regions and the single-phase BMT subsolidus solution area, have been determined through qualitative XRD phase analysis of approximately 150 synthesised compositions. The BMT trapezoidal cubic pyrochlore region could be represented by the general formula of Bi_3.56-xMg_1.96-yTa_2.48+_x + yO_{13.50+x+(3/2)y}, 0.00 ≤ x ≤ 0.32; 0.00 ≤ y ≤ 0.20. Two formation mechanisms are proposed: (i) compositions of Bi_3.56-xMg_1.96Ta_2.48+xO_13.50+x at fixed MgO content, involving a one-to-one substitution of Bi³⁺ by Ta⁵⁺ and oxygen non-stoichiometry x Bi³⁺ → x Ta⁵⁺ + x O²⁻ and (ii) Bi_3.56Mg_1.96-yTa_2.48+yO_13.50+(3/2)y at fixed bismuth content, with Mg content reduction proportional to Ta⁵⁺ and O²⁻ substitution, i.e. y Mg²⁺ → y Ta⁵⁺ + 3y/2 O²⁻. Dielectric properties within this extensive subsolidus solution area exhibit variability; specifically, BMT pyrochlores exhibit dielectric constants (ε′) ranging from 70 to 84, dielectric losses (tan δ) in the order of 0.2–9.1 × 10⁻³, negative temperature coefficients of dielectric constants (TCε′) ranging from 130 to 360 ppm/°C and activation energies (Ea) ranging from 1.10 to 1.48 eV.

{"title":"Novel pyrochlores in the Bi2O3–MgO–Ta2O5 (BMT) system: Synthesis optimisation, phase equilibria and dielectric properties","authors":"K.B. Tan , P.Y. Tan , Y. Feng , C.C. Khaw , V. Raman , H.C. Ananda Murthy , R. Balachandran , S.K. Chen , O.J. Lee , K.Y. Chan , D. Zhou , M. Lu","doi":"10.1016/j.jsamd.2025.100866","DOIUrl":"10.1016/j.jsamd.2025.100866","url":null,"abstract":"<div><div>Investigating the phase equilibria within the Bi2O3–MgO–Ta2O5 (BMT) system offers critical insights into the formation and stability of pyrochlore phases. This understanding enables the correlation of dielectric properties with phase equilibria data, facilitating the identification of compositions exhibiting optimal performance. Phase equilibria within the BMT system have been investigated across a temperature range of 800–1025 °C. The layouts of compatible triangles, encompassing two-phase, three-phase regions and the single-phase BMT subsolidus solution area, have been determined through qualitative XRD phase analysis of approximately 150 synthesised compositions. The BMT trapezoidal cubic pyrochlore region could be represented by the general formula of Bi3.56-xMg1.96-yTa2.48+x + yO13.50+x+(3/2)y, 0.00 ≤ x ≤ 0.32; 0.00 ≤ y ≤ 0.20. Two formation mechanisms are proposed: (i) compositions of Bi3.56-xMg1.96Ta2.48+xO13.50+x at fixed MgO content, involving a one-to-one substitution of Bi3+ by Ta5+ and oxygen non-stoichiometry x Bi3+ → x Ta5+ + x O2− and (ii) Bi3.56Mg1.96-yTa2.48+yO13.50+(3/2)y at fixed bismuth content, with Mg content reduction proportional to Ta5+ and O2− substitution, i.e. y Mg2+ → y Ta5+ + 3y/2 O2−. Dielectric properties within this extensive subsolidus solution area exhibit variability; specifically, BMT pyrochlores exhibit dielectric constants (ε′) ranging from 70 to 84, dielectric losses (tan δ) in the order of 0.2–9.1 × 10−3, negative temperature coefficients of dielectric constants (TCε′) ranging from 130 to 360 ppm/°C and activation energies (Ea) ranging from 1.10 to 1.48 eV.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100866"},"PeriodicalIF":6.7,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recycling waste for energy: Reusing methyl orange dye-adsorbed polythiophene/Fe3O4 nanorods/reduced graphene oxide nanocomposite as a supercapacitor electrode

IF 6.7 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-02-11 DOI: 10.1016/j.jsamd.2025.100865

Ahmad Husain , Asim Ali , Sara A. Alqarni , Khalid Ansari , Mohtaram Danish , Prem Gunnasegaran , Mohammad Kanan , Jayant Giri , M. Kandasamy , M.M.A. Khan , Kyeong Tae Kang

This study presents a sustainable waste-to-wealth approach by repurposing methyl orange (MO) dye-adsorbed polythiophene/iron oxide/reduced graphene oxide nanocomposite (PTh/Fe₃O₄/RGO) for dual functionality in wastewater treatment and energy storage. PTh/Fe₃O₄/RGO nanocomposite was initially employed as an effective adsorbent to remove harmful MO dye from wastewater. After successful adsorption, the dye-saturated PTh/Fe₃O₄/RGO was repurposed as a supercapacitor electrode to investigate its energy storage capabilities. Electrochemical tests before MO adsorption revealed that the pristine PTh/Fe₃O₄/RGO electrode demonstrated promising performance with a specific capacitance of 467.3 Fg⁻¹ at 1 Ag⁻¹ and excellent cyclic stability of 95.3% retention over 5000 Galvanostatic charge-discharge (GCD) cycles. Further, the maximum adsorption of MO by the PTh/Fe₃O₄/RGO was achieved under optimal conditions: pH 3, 2.5 gL⁻¹ dosage, 120 min contact time, and 50 mgL⁻¹ MO concentration. The adsorption behaviour was well-explained by the Langmuir isotherm, pseudo-second-order kinetics, and Dubinin-Radushkevich (D-R) isotherm, indicating a physical adsorption process with a monolayer capacity of 151.34 mgg⁻¹. Thermodynamic analysis, with a positive enthalpy (ΔH°) and negative Gibbs free energy (ΔG°), confirmed that the process is endothermic and spontaneous. Desorption studies showed that 88.72% of the MO could be desorbed in the first cycle, with effective regeneration up to six cycles using NaOH. Post-adsorption, the material still retained significant supercapacitor properties, with a specific capacitance of 380.9 Fg⁻¹ at 1 Ag⁻¹ and 83.2% cyclic stability over 5000 GCD cycles. This study demonstrates a circular, sustainable approach that integrates waste treatment with energy storage, highlighting the potential of reusing materials for multifunctional applications.

{"title":"Recycling waste for energy: Reusing methyl orange dye-adsorbed polythiophene/Fe3O4 nanorods/reduced graphene oxide nanocomposite as a supercapacitor electrode","authors":"Ahmad Husain , Asim Ali , Sara A. Alqarni , Khalid Ansari , Mohtaram Danish , Prem Gunnasegaran , Mohammad Kanan , Jayant Giri , M. Kandasamy , M.M.A. Khan , Kyeong Tae Kang","doi":"10.1016/j.jsamd.2025.100865","DOIUrl":"10.1016/j.jsamd.2025.100865","url":null,"abstract":"<div><div>This study presents a sustainable waste-to-wealth approach by repurposing methyl orange (MO) dye-adsorbed polythiophene/iron oxide/reduced graphene oxide nanocomposite (PTh/Fe3O4/RGO) for dual functionality in wastewater treatment and energy storage. PTh/Fe3O4/RGO nanocomposite was initially employed as an effective adsorbent to remove harmful MO dye from wastewater. After successful adsorption, the dye-saturated PTh/Fe3O4/RGO was repurposed as a supercapacitor electrode to investigate its energy storage capabilities. Electrochemical tests before MO adsorption revealed that the pristine PTh/Fe3O4/RGO electrode demonstrated promising performance with a specific capacitance of 467.3 Fg−1 at 1 Ag−1 and excellent cyclic stability of 95.3% retention over 5000 Galvanostatic charge-discharge (GCD) cycles. Further, the maximum adsorption of MO by the PTh/Fe3O4/RGO was achieved under optimal conditions: pH 3, 2.5 gL−1 dosage, 120 min contact time, and 50 mgL−1 MO concentration. The adsorption behaviour was well-explained by the Langmuir isotherm, pseudo-second-order kinetics, and Dubinin-Radushkevich (D-R) isotherm, indicating a physical adsorption process with a monolayer capacity of 151.34 mgg−1. Thermodynamic analysis, with a positive enthalpy (ΔH°) and negative Gibbs free energy (ΔG°), confirmed that the process is endothermic and spontaneous. Desorption studies showed that 88.72% of the MO could be desorbed in the first cycle, with effective regeneration up to six cycles using NaOH. Post-adsorption, the material still retained significant supercapacitor properties, with a specific capacitance of 380.9 Fg−1 at 1 Ag−1 and 83.2% cyclic stability over 5000 GCD cycles. This study demonstrates a circular, sustainable approach that integrates waste treatment with energy storage, highlighting the potential of reusing materials for multifunctional applications.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100865"},"PeriodicalIF":6.7,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development, exploration and optimization of porous titanium and titanium alloys: A review

IF 6.7 3区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Science: Advanced Materials and Devices

Pub Date : 2025-02-08 DOI: 10.1016/j.jsamd.2025.100863

Baoguang Zhang, Kun Yang, Lei Shen, Xingyu Duan, Shaoyang Zhao, Wenbin Gao, Chenyang Xu, Jian Wang

As an integrated material of structure and function, porous titanium (Ti) and Ti alloys with a porosity of (10–95%) processes a wide application prospect in many fields. However, they still faced some issues, including the design and optimization of pore structure, the improvement of service performance, and the exploration of unique applications. To provide valuable insights into addressing these issues, the recent advances in porous Ti and Ti alloys have been reviewed systematically. Firstly, the manufacturing technologies for porous Ti and Ti alloys were expounded and objectively evaluated, with a focus on comparing the corresponding pore structures and mechanical properties. Besides, the current applications corresponding mechanisms, and characteristics of porous Ti and Ti alloys were introduced in detail. Finally, as key factors determining the performance and functions of porous Ti and Ti alloys, the design and optimization of pore structure and doping modification were emphatically summarized and discussed.

{"title":"Development, exploration and optimization of porous titanium and titanium alloys: A review","authors":"Baoguang Zhang, Kun Yang, Lei Shen, Xingyu Duan, Shaoyang Zhao, Wenbin Gao, Chenyang Xu, Jian Wang","doi":"10.1016/j.jsamd.2025.100863","DOIUrl":"10.1016/j.jsamd.2025.100863","url":null,"abstract":"<div><div>As an integrated material of structure and function, porous titanium (Ti) and Ti alloys with a porosity of (10–95%) processes a wide application prospect in many fields. However, they still faced some issues, including the design and optimization of pore structure, the improvement of service performance, and the exploration of unique applications. To provide valuable insights into addressing these issues, the recent advances in porous Ti and Ti alloys have been reviewed systematically. Firstly, the manufacturing technologies for porous Ti and Ti alloys were expounded and objectively evaluated, with a focus on comparing the corresponding pore structures and mechanical properties. Besides, the current applications corresponding mechanisms, and characteristics of porous Ti and Ti alloys were introduced in detail. Finally, as key factors determining the performance and functions of porous Ti and Ti alloys, the design and optimization of pore structure and doping modification were emphatically summarized and discussed.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100863"},"PeriodicalIF":6.7,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0