Pub Date : 2025-02-08DOI: 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}
Pub Date : 2025-02-08DOI: 10.1016/j.jsamd.2025.100862
Ahmed G. Abdelaziz , Hassan Nageh , Mohga S. Abdalla , Sara M. Abdo , Asmaa A. Amer , Samah A. Loutfy , Ali Alsalme , David Cornu , Mikhael Bechelany , Ahmed Barhoum
This study aimed to develop and optimize composite nanofibrous scaffolds for enhanced wound healing and antimicrobial applications. Polyvinyl alcohol (PVA) nanofibers loaded with ethanolic flaxseed extract were fabricated via solution electrospinning. The methodology focused on optimizing key parameters, including polymer-to-extract ratio, swelling ratio, hydrolytic degradation, and nanofiber mean diameter, to achieve superior scaffold properties. The optimized scaffold, with a PVA-to-flaxseed extract weight ratio of 70:30 (PV70:FS30), exhibited bead-free morphology and a mean fiber diameter of 319 nm (compared to 175 nm for pure PVA fibers). PV70:FS30 scaffolds demonstrated significant antimicrobial activity, effectively inhibiting both Gram-negative and Gram-positive bacterial growth. Moreover, human melanocyte (HBF-4) viability and wound healing rates were substantially higher on PV70:FS30 scaffolds than on pure PVA fibers (viability: 122.3% vs. 91.2%; wound closure at 48 h: 97.3% vs. 69.6%, relative to control). However, cell adhesion was lower on PV70:FS30 scaffolds (93 cells/section vs. 183 cells/section for PVA nanofibers) due to increased cross-linking and reduced hydrophilicity from flaxseed extract incorporation. These findings indicate a clear interplay between flaxseed extract concentration and scaffold morphology, highlighting their potential for advancing skin tissue engineering applications. These results provide insights into designing nanofibrous scaffolds for improved wound healing and antimicrobial properties.
{"title":"Enhanced wound healing with flaxseed extract-loaded polyvinyl alcohol nanofibrous scaffolds: Phytochemical composition, antioxidant activity, and antimicrobial properties","authors":"Ahmed G. Abdelaziz , Hassan Nageh , Mohga S. Abdalla , Sara M. Abdo , Asmaa A. Amer , Samah A. Loutfy , Ali Alsalme , David Cornu , Mikhael Bechelany , Ahmed Barhoum","doi":"10.1016/j.jsamd.2025.100862","DOIUrl":"10.1016/j.jsamd.2025.100862","url":null,"abstract":"<div><div>This study aimed to develop and optimize composite nanofibrous scaffolds for enhanced wound healing and antimicrobial applications. Polyvinyl alcohol (PVA) nanofibers loaded with ethanolic flaxseed extract were fabricated via solution electrospinning. The methodology focused on optimizing key parameters, including polymer-to-extract ratio, swelling ratio, hydrolytic degradation, and nanofiber mean diameter, to achieve superior scaffold properties. The optimized scaffold, with a PVA-to-flaxseed extract weight ratio of 70:30 (PV70:FS30), exhibited bead-free morphology and a mean fiber diameter of 319 nm (compared to 175 nm for pure PVA fibers). PV70:FS30 scaffolds demonstrated significant antimicrobial activity, effectively inhibiting both Gram-negative and Gram-positive bacterial growth. Moreover, human melanocyte (HBF-4) viability and wound healing rates were substantially higher on PV70:FS30 scaffolds than on pure PVA fibers (viability: 122.3% vs. 91.2%; wound closure at 48 h: 97.3% vs. 69.6%, relative to control). However, cell adhesion was lower on PV70:FS30 scaffolds (93 cells/section vs. 183 cells/section for PVA nanofibers) due to increased cross-linking and reduced hydrophilicity from flaxseed extract incorporation. These findings indicate a clear interplay between flaxseed extract concentration and scaffold morphology, highlighting their potential for advancing skin tissue engineering applications. These results provide insights into designing nanofibrous scaffolds for improved wound healing and antimicrobial properties.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100862"},"PeriodicalIF":6.7,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403413","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}
Pub Date : 2025-02-06DOI: 10.1016/j.jsamd.2025.100861
Ehsan Mehdizadeh Omrani, Fakhroddin Nazari
The research nominates an innovative magnetically tunable 4×2 encoder structure that utilizes ring resonators and Terfenol-D tubes embedded inside a robust phononic crystal made of solid materials. The proposed method takes advantage of the variable magnetic field strengths of Terfenol-D in the MHz frequency spectrum through wave interference techniques. The encoder system is designed as a two-dimensional phononic crystal, using poly methyl methacrylate as the foundational material, and integrates a square arrangement of circular tungsten tubes. The encoder features an ultra-compact footprint of 125 × 10-6 m2, with four input waveguides and two output waveguides, each equipped with a pair of ring resonators. The smaller cavities are coupled with curved two-branch waveguides, optimizing wave interference while minimizing losses and scattering to achieve enhanced performance. Each ring resonator incorporates three integrated Terfenol-D tubes, which modulate their Young's modulus properties. The symmetrical design of the structure enables the generation of distinct resonant frequencies under varying magnetic field intensities. The resonance frequencies of the ring resonators, along with the dynamic adjustment of the Terfenol-D cylinders, significantly influence the encoder's operational efficiency and tunability. Tunability experiments are conducted for three distinct Young's modulus values of Terfenol-D, corresponding to three various magnetic fields, resulting in resonance frequencies of 1.7388 MHz, 1.7389 MHz, and 1.7390 MHz. The encoder's performance was assessed through the application of the finite element method, yielding an average contrast ratio of 10.16 dB. This proposed encoder offers a straightforward and effective solution for acoustic communication systems and networks, demonstrating significant potential for practical applications.
{"title":"Magnetically tunable 4 × 2 encoder utilizing Terfenol-D-embedded phononic crystal ring resonators","authors":"Ehsan Mehdizadeh Omrani, Fakhroddin Nazari","doi":"10.1016/j.jsamd.2025.100861","DOIUrl":"10.1016/j.jsamd.2025.100861","url":null,"abstract":"<div><div>The research nominates an innovative magnetically tunable 4×2 encoder structure that utilizes ring resonators and Terfenol-D tubes embedded inside a robust phononic crystal made of solid materials. The proposed method takes advantage of the variable magnetic field strengths of Terfenol-D in the MHz frequency spectrum through wave interference techniques. The encoder system is designed as a two-dimensional phononic crystal, using poly methyl methacrylate as the foundational material, and integrates a square arrangement of circular tungsten tubes. The encoder features an ultra-compact footprint of 125 × 10<sup>-6</sup> m<sup>2</sup>, with four input waveguides and two output waveguides, each equipped with a pair of ring resonators. The smaller cavities are coupled with curved two-branch waveguides, optimizing wave interference while minimizing losses and scattering to achieve enhanced performance. Each ring resonator incorporates three integrated Terfenol-D tubes, which modulate their Young's modulus properties. The symmetrical design of the structure enables the generation of distinct resonant frequencies under varying magnetic field intensities. The resonance frequencies of the ring resonators, along with the dynamic adjustment of the Terfenol-D cylinders, significantly influence the encoder's operational efficiency and tunability. Tunability experiments are conducted for three distinct Young's modulus values of Terfenol-D, corresponding to three various magnetic fields, resulting in resonance frequencies of 1.7388 MHz, 1.7389 MHz, and 1.7390 MHz. The encoder's performance was assessed through the application of the finite element method, yielding an average contrast ratio of 10.16 dB. This proposed encoder offers a straightforward and effective solution for acoustic communication systems and networks, demonstrating significant potential for practical applications.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100861"},"PeriodicalIF":6.7,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422072","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}
Pub Date : 2025-01-21DOI: 10.1016/j.jsamd.2025.100852
Junrui Luan , Xin Dong , Shuwen Zhou
The present study explains the unmoved synthesis of Pd nanoparticle-decorated guar gum utilized as Fe3O4 NPs (Fe3O4@guar gum/Pd NPs), the resultant catalytic and biological applications within the context of an eco-friendly procedure. FT-IR, FE-SEM, TEM, EDS, and so on are some of the methods applied to evaluate the constructional and physicochemical features of such an unequaled substance. After the characterization of the process, we successfully used the prepared Fe3O4@guar gum/Pd NPs in the N-arylation of indole across C(aryl)-N bond formation from the pertaining haloarens (I, Br, Cl) through Ullmann-type coupling reactions. In addition, the new accelerator bears the ability to be recuperated and recycled 7 times. The MTT test was then used to investigate the extent to which Fe3O4@guar gum/Pd NP-treated cells suppressed human breast cancer. Healthy (HUVEC) and breast cancer cells, specifically MCF-10, were used for the evaluation. The Fe3O4@guar gum/Pd NPs showed an IC50 value of 62 μg/mL against MCF-10, respectively. The presence of the material resulted in a 40–50% induction of cell apoptosis, along with down regulation of the anti-apoptotic marker. Finally, the Fe3O4@guar gum/Pd NPs showed suppressive properties on colony formation. According to our research, the Fe3O4@guar gum/Pd NPs can decrease STAT3 expression in the treated cells while increasing p53 levels. The effect of Fe3O4@guar gum/Pd NPs on human breast cancer cells demonstrates how important p53 and STAT3 are to the ensuing biological consequences. According to these findings, Fe3O4@guar gum/Pd NPs have a lot of promise as a therapy for human breast cancer cells.
{"title":"Guar gum-modified magnetic palladium nanocatalyst: C–N coupling reaction and STAT3-Mediated breast cancer therapy","authors":"Junrui Luan , Xin Dong , Shuwen Zhou","doi":"10.1016/j.jsamd.2025.100852","DOIUrl":"10.1016/j.jsamd.2025.100852","url":null,"abstract":"<div><div>The present study explains the unmoved synthesis of Pd nanoparticle-decorated guar gum utilized as Fe<sub>3</sub>O<sub>4</sub> NPs (Fe<sub>3</sub>O<sub>4</sub>@guar gum/Pd NPs), the resultant catalytic and biological applications within the context of an eco-friendly procedure. FT-IR, FE-SEM, TEM, EDS, and so on are some of the methods applied to evaluate the constructional and physicochemical features of such an unequaled substance. After the characterization of the process, we successfully used the prepared Fe<sub>3</sub>O<sub>4</sub>@guar gum/Pd NPs in the <em>N</em>-arylation of indole across C(aryl)-N bond formation from the pertaining haloarens (I, Br, Cl) through Ullmann-type coupling reactions. In addition, the new accelerator bears the ability to be recuperated and recycled 7 times. The MTT test was then used to investigate the extent to which Fe<sub>3</sub>O<sub>4</sub>@guar gum/Pd NP-treated cells suppressed human breast cancer. Healthy (HUVEC) and breast cancer cells, specifically MCF-10, were used for the evaluation. The Fe<sub>3</sub>O<sub>4</sub>@guar gum/Pd NPs showed an IC<sub>50</sub> value of 62 μg/mL against MCF-10, respectively. The presence of the material resulted in a 40–50% induction of cell apoptosis, along with down regulation of the anti-apoptotic marker. Finally, the Fe<sub>3</sub>O<sub>4</sub>@guar gum/Pd NPs showed suppressive properties on colony formation. According to our research, the Fe3O4@guar gum/Pd NPs can decrease STAT3 expression in the treated cells while increasing p53 levels. The effect of Fe<sub>3</sub>O<sub>4</sub>@guar gum/Pd NPs on human breast cancer cells demonstrates how important p53 and STAT3 are to the ensuing biological consequences. According to these findings, Fe<sub>3</sub>O<sub>4</sub>@guar gum/Pd NPs have a lot of promise as a therapy for human breast cancer cells.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100852"},"PeriodicalIF":6.7,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143203208","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}
Pub Date : 2025-01-20DOI: 10.1016/j.jsamd.2025.100853
Hui Yang , Cui Wang , Qingjiang Wang , Feng Han
A straightforward, efficient, and environmentally friendly method has been developed to synthesize gold nanoparticles (Au NPs) supported on kaolin with no harmful additives, ephedra flower extract acts as a biogenic stabilizing and reducing agent. An analysis of the Au NPs/Kaolin composite's structural properties was conducted using FE-SEM, TEM, EDX, and XRD assays. The biological activity of the composite was evaluated through cytotoxicity tests using the MTT assay. In addition, its potential anti-ovarian cancer properties were tested against several ovarian cancer cell lines, including TOV-21G, OV-90, SW 626, and UWB1.289, with IC50 values found to be 112, 250, 278, and 243 μg/mL, respectively. The ovarian cancer cell lines showed a dose-dependent decline in % cell viability. The HUVEC cell line was also used to evaluate the material's biocompatibility with normal cells. Based on the results, the bio-composite material is found promising as a therapeutic agent for treating human ovarian cancer.
{"title":"Ephedra extract-mediated gold nanoparticles on Kaolin: A natural approach for reduction and stabilization, with evaluation of antioxidant and anti-ovarian cancer activities","authors":"Hui Yang , Cui Wang , Qingjiang Wang , Feng Han","doi":"10.1016/j.jsamd.2025.100853","DOIUrl":"10.1016/j.jsamd.2025.100853","url":null,"abstract":"<div><div>A straightforward, efficient, and environmentally friendly method has been developed to synthesize gold nanoparticles (Au NPs) supported on kaolin with no harmful additives, ephedra flower extract acts as a biogenic stabilizing and reducing agent. An analysis of the Au NPs/Kaolin composite's structural properties was conducted using FE-SEM, TEM, EDX, and XRD assays. The biological activity of the composite was evaluated through cytotoxicity tests using the MTT assay. In addition, its potential anti-ovarian cancer properties were tested against several ovarian cancer cell lines, including TOV-21G, OV-90, SW 626, and UWB1.289, with IC50 values found to be 112, 250, 278, and 243 μg/mL, respectively. The ovarian cancer cell lines showed a dose-dependent decline in % cell viability. The HUVEC cell line was also used to evaluate the material's biocompatibility with normal cells. Based on the results, the bio-composite material is found promising as a therapeutic agent for treating human ovarian cancer.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100853"},"PeriodicalIF":6.7,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137617","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}
Pub Date : 2025-01-16DOI: 10.1016/j.jsamd.2025.100851
Seyyedeh Fatemeh Hosseini , Mir Saeed Seyed Dorraji , Shiva Mohajer , Seyedeh Narges Saeedi , Masoumeh Kianfar , Alexandr V. Koshelev , Nataliya A. Arkharova , Denis N. Karimov
Here, the collaboration of photocatalysis and photothermal conversion has been defined as an efficient strategy for converting unusable near-infrared (NIR) light to operational ultraviolet–visible (UV–vis) photons. For this, a new heterostructured photocatalyst NaYF4: Tm3+, Er3+, Yb3+ @ BiOI was successfully synthesized using a simple hydrothermal approach paired with electrostatic self-assembly. The results show that BiOI can indirectly use the NIR portion to produce electron-hole pairs due to the presence of upconversion nanoparticles (UCNPs). On the other hand, loading TiO2 derived Ti3C2 MXenes on NaYF4: Tm3+, Er3+, Yb3+ @ BiOI increased tetracycline (TC) degradation to 36% and 90%, compared to narrow band gap BiOI, within 120 min under NIR light irradiation and sunlight irradiation, respectively. Moreover, the reaction rate of UCNP@BiOI@TiO2–Ti3C2 was found to be 2.85 times higher under sunlight compared to NIR. It can be attributed to the synergistic photocatalytic and photothermal effects triggered by NIR light. In addition, the broad photoresponse range of TiO2 and the Schottky junction formed by Ti3C2 MXenes between TiO2 and BiOI facilitate charge separation while reducing photo-generated electron-hole pair recombination. The reduced recombination rate in the synthesized heterojunction was further substantiated by the larger photocurrent response and smaller EIS arc. Excellent catalytic activity is explained by the S-scheme mechanism, which produces holes at the valence band and superoxide radicals at the conductive band in the BiOI and Ti3C2, respectively. Significantly, the cycling results demonstrated that the photocatalysts had the requisite reusability and recyclability for real-world applications. The cooperative MXene and UCNPs utilized in this study provide a helpful basis for the logical design of full-spectrum photocatalysts.
{"title":"Synergistic photothermal conversion and visible-light photodegradation of antibiotic in S-type TiO2 derived Ti3C2-MXene loaded on NaYF4: Tm3+, Er3+, Yb3+ @BiOI","authors":"Seyyedeh Fatemeh Hosseini , Mir Saeed Seyed Dorraji , Shiva Mohajer , Seyedeh Narges Saeedi , Masoumeh Kianfar , Alexandr V. Koshelev , Nataliya A. Arkharova , Denis N. Karimov","doi":"10.1016/j.jsamd.2025.100851","DOIUrl":"10.1016/j.jsamd.2025.100851","url":null,"abstract":"<div><div>Here, the collaboration of photocatalysis and photothermal conversion has been defined as an efficient strategy for converting unusable near-infrared (NIR) light to operational ultraviolet–visible (UV–vis) photons. For this, a new heterostructured photocatalyst NaYF<sub>4</sub>: Tm<sup>3+</sup>, Er<sup>3+</sup>, Yb<sup>3+</sup> @ BiOI was successfully synthesized using a simple hydrothermal approach paired with electrostatic self-assembly. The results show that BiOI can indirectly use the NIR portion to produce electron-hole pairs due to the presence of upconversion nanoparticles (UCNPs). On the other hand, loading TiO<sub>2</sub> derived Ti<sub>3</sub>C<sub>2</sub> MXenes on NaYF<sub>4</sub>: Tm<sup>3+</sup>, Er<sup>3+</sup>, Yb<sup>3+</sup> @ BiOI increased tetracycline (TC) degradation to 36% and 90%, compared to narrow band gap BiOI, within 120 min under NIR light irradiation and sunlight irradiation, respectively. Moreover, the reaction rate of UCNP@BiOI@TiO<sub>2</sub>–Ti<sub>3</sub>C<sub>2</sub> was found to be 2.85 times higher under sunlight compared to NIR. It can be attributed to the synergistic photocatalytic and photothermal effects triggered by NIR light. In addition, the broad photoresponse range of TiO<sub>2</sub> and the Schottky junction formed by Ti<sub>3</sub>C<sub>2</sub> MXenes between TiO<sub>2</sub> and BiOI facilitate charge separation while reducing photo-generated electron-hole pair recombination. The reduced recombination rate in the synthesized heterojunction was further substantiated by the larger photocurrent response and smaller EIS arc. Excellent catalytic activity is explained by the S-scheme mechanism, which produces holes at the valence band and superoxide radicals at the conductive band in the BiOI and Ti<sub>3</sub>C<sub>2</sub>, respectively. Significantly, the cycling results demonstrated that the photocatalysts had the requisite reusability and recyclability for real-world applications. The cooperative MXene and UCNPs utilized in this study provide a helpful basis for the logical design of full-spectrum photocatalysts.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100851"},"PeriodicalIF":6.7,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143203651","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}
Today, the measurement of ammonia gas as a corrosive and irritating gas in the environment is very crucial. Therefore, a simple and efficient method for its detection is very important. A quartz crystal microbalance (QCM) gas sensor modified with porous nanomaterials is proposed as a new device with high performance at ambient temperature. Metal-organic frameworks (MOFs), as a type of nanoporous material, have attracted great attention in the field of gas sensing due to their unique properties, such as high adsorption sites for gas molecules compared to other conventional sensing materials. In this work, nanocomposite films of Cu-BTC (MOF containing copper as a metal node and 1,3,5-benzene tricarboxylic acid as an organic linker) with different carbon nanotube (CNT) weight percentages are fabricated on a QCM for the detection of low amounts of ammonia at room temperature. The size and morphology, chemical, crystalline structure, and porosity properties of the synthesized Cu-BTC and Cu-BTC/CNT nanocomposites were examined by field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and BET techniques, respectively. All Cu-BTC/CNT nanocomposites showed a higher response and sensitivity to ammonia gas than both Cu-BTC and CNT individually. In this work, the best sensing behavior is observed in Cu-BTC/CNT10 nanocomposite, with a sensitivity of 8.18 Hz ppm−1, a limit of detection (LOD) of 1.97 ppm, and a limit of quantification (LOQ) of 6.57 ppm in exposure to ammonia vapors. This sensor exhibited good repeatability and reversibility, reasonable selectivity towards other volatile organic compounds (VOCs), and long-term stability during 7 weeks of testing.
{"title":"Fabrication of highly efficient quartz crystal microbalance ammonia sensor based on Cu-BTC nanocomposites","authors":"Kobra Vazirinezhad , Fatemeh Shariatmadar Tehrani , Sedigheh Zeinali , Maryam Tohidi","doi":"10.1016/j.jsamd.2025.100850","DOIUrl":"10.1016/j.jsamd.2025.100850","url":null,"abstract":"<div><div>Today, the measurement of ammonia gas as a corrosive and irritating gas in the environment is very crucial. Therefore, a simple and efficient method for its detection is very important. A quartz crystal microbalance (QCM) gas sensor modified with porous nanomaterials is proposed as a new device with high performance at ambient temperature. Metal-organic frameworks (MOFs), as a type of nanoporous material, have attracted great attention in the field of gas sensing due to their unique properties, such as high adsorption sites for gas molecules compared to other conventional sensing materials. In this work, nanocomposite films of Cu-BTC (MOF containing copper as a metal node and 1,3,5-benzene tricarboxylic acid as an organic linker) with different carbon nanotube (CNT) weight percentages are fabricated on a QCM for the detection of low amounts of ammonia at room temperature. The size and morphology, chemical, crystalline structure, and porosity properties of the synthesized Cu-BTC and Cu-BTC/CNT nanocomposites were examined by field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and BET techniques, respectively. All Cu-BTC/CNT nanocomposites showed a higher response and sensitivity to ammonia gas than both Cu-BTC and CNT individually. In this work, the best sensing behavior is observed in Cu-BTC/CNT10 nanocomposite, with a sensitivity of 8.18 Hz ppm<sup>−1</sup><sup>,</sup> a limit of detection (LOD) of 1.97 ppm, and a limit of quantification (LOQ) of 6.57 ppm in exposure to ammonia vapors. This sensor exhibited good repeatability and reversibility, reasonable selectivity towards other volatile organic compounds (VOCs)<strong>,</strong> and long-term stability during 7 weeks of testing.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100850"},"PeriodicalIF":6.7,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137618","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}
This study aims to discover innovative thermal storage materials that fulfill the specifications of concentrated solar power systems. Thermal storage materials based on ternary eutectic (Hitec) with nano-SiO2 and nano-MgO are investigated. Simultaneous thermal analysis and laser flash analysis are used to study the main properties of materials. The results indicate that the inclusion of nano-SiO2 and nano-MgO reduces the melting point while enhancing the latent heat of the base salt. Doping the base salt with 0.3 wt% nano-SiO2 and 0.7 wt% nano-MgO results in molten salt nanocomposites with an average specific heat of 2.16 J/(g⋅K), which is 54.3% higher than that of the base salt. This surpasses the specific heat of the base salt mixed with a single type of nanoparticle. The thermal conductivity of this nanocomposite is increased by 13.13% to 0.836 W/(m⋅K) compared to the base salt. Furthermore, this study demonstrated that the effect of interfacial thermal resistance on specific heat capacity and heat transfer characteristics is the opposite. While the nanoparticles can increase the specific heat capacity of the molten salt, they can also reduce the heat transfer rate within this material.
{"title":"Thermophysical properties enhancement of KNO3–NaNO3–NaNO2 mixed with SiO2/MgO nanoparticles","authors":"Baiyuan Tian , Chuang Zhu , Manting Gu , Minhao Xu , Wenxuan He","doi":"10.1016/j.jsamd.2025.100849","DOIUrl":"10.1016/j.jsamd.2025.100849","url":null,"abstract":"<div><div>This study aims to discover innovative thermal storage materials that fulfill the specifications of concentrated solar power systems. Thermal storage materials based on ternary eutectic (Hitec) with nano-SiO<sub>2</sub> and nano-MgO are investigated. Simultaneous thermal analysis and laser flash analysis are used to study the main properties of materials. The results indicate that the inclusion of nano-SiO<sub>2</sub> and nano-MgO reduces the melting point while enhancing the latent heat of the base salt. Doping the base salt with 0.3 wt% nano-SiO<sub>2</sub> and 0.7 wt% nano-MgO results in molten salt nanocomposites with an average specific heat of 2.16 J/(g⋅K), which is 54.3% higher than that of the base salt. This surpasses the specific heat of the base salt mixed with a single type of nanoparticle. The thermal conductivity of this nanocomposite is increased by 13.13% to 0.836 W/(m⋅K) compared to the base salt. Furthermore, this study demonstrated that the effect of interfacial thermal resistance on specific heat capacity and heat transfer characteristics is the opposite. While the nanoparticles can increase the specific heat capacity of the molten salt, they can also reduce the heat transfer rate within this material.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100849"},"PeriodicalIF":6.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143203534","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}
Pub Date : 2025-01-08DOI: 10.1016/j.jsamd.2025.100848
Jeong Woo Hong, Sang Ho Lee, Jin Park, Min Seok Kim, Seung Ji Bae, Won Suk Koh, Gang San Yun, In Man Kang
This study presents the design and analysis of a quasi-vertical multi-fin gallium nitride (GaN) power device based on GaN-on-sapphire epitaxy, simulated using three-dimensional technology computer-aided design. The proposed structure aims to overcome the limitations of lateral high-electron-mobility transistors for high-power applications, as well as to address the cost issues associated with fully vertical GaN structures. Device optimization began with a single-fin structure and progressed incrementally. First, we determined the optimal doping concentration for n-type GaN in the drift region and channel, followed by the application and analysis of the trench drain, source field plate, and multi-fin structures. The optimized device achieves impressive performance, with a specific on-resistance of 0.85 mΩ cm2, a breakdown voltage of 1263 V, and a Baliga's figure of merit of 1.87 GW cm−2. This study's systematic optimization and structural analysis provide valuable insights into enhancing device characteristics for high-power semiconductor applications and contribute to a deeper understanding of the electrical properties of quasi-vertical fin-type power devices.
{"title":"Design and analysis of quasi-vertical multi-fin GaN power devices based on epitaxially grown GaN-on-sapphire","authors":"Jeong Woo Hong, Sang Ho Lee, Jin Park, Min Seok Kim, Seung Ji Bae, Won Suk Koh, Gang San Yun, In Man Kang","doi":"10.1016/j.jsamd.2025.100848","DOIUrl":"10.1016/j.jsamd.2025.100848","url":null,"abstract":"<div><div>This study presents the design and analysis of a quasi-vertical multi-fin gallium nitride (GaN) power device based on GaN-on-sapphire epitaxy, simulated using three-dimensional technology computer-aided design. The proposed structure aims to overcome the limitations of lateral high-electron-mobility transistors for high-power applications, as well as to address the cost issues associated with fully vertical GaN structures. Device optimization began with a single-fin structure and progressed incrementally. First, we determined the optimal doping concentration for n-type GaN in the drift region and channel, followed by the application and analysis of the trench drain, source field plate, and multi-fin structures. The optimized device achieves impressive performance, with a specific on-resistance of 0.85 mΩ cm<sup>2</sup>, a breakdown voltage of 1263 V, and a Baliga's figure of merit of 1.87 GW cm<sup>−2</sup>. This study's systematic optimization and structural analysis provide valuable insights into enhancing device characteristics for high-power semiconductor applications and contribute to a deeper understanding of the electrical properties of quasi-vertical fin-type power devices.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 1","pages":"Article 100848"},"PeriodicalIF":6.7,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092759","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}
Pub Date : 2025-01-06DOI: 10.1016/j.jsamd.2024.100843
Sumanta Sahoo , Abdullah Al Mahmud , Ankur Sood , Ganesh Dhakal , Santosh K. Tiwari , Sunmi Zo , Hong Mi Kim , Sung Soo Han
Bifunctional electrocatalysts have shown considerable research attention in the field of water splitting in the last few years. The current work reports a simple microwave (MW)-assisted synthetic approach for the fabrication of nanocomposite based on graphitic-C3N4, reduced graphene oxide (rGO), and MoS2. Notably, the ternary composite was synthesized through ultrafast MW irradiation within a short duration by a cost-effective synthetic route. The synthesized composite served as the suitable electrocatalyst for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The overpotential of the composite was 172 mV for HER and 380 mV for OER. Moreover, the Tafel slopes for HER and OER were 147 and 97 mV dec−1 for HER and OER, respectively. It is further interesting to note that the composite also displayed admirable stability of 24 h for overall water splitting. Inclusively, the current work demonstrated an efficient rGO-supported MW-assisted inexpensive synthetic approach for the development of 2D bifunctional electrocatalysts.
{"title":"Microwave-assisted facile synthesis of graphitic-C3N4/reduced graphene oxide/MoS2 composite as the bifunctional electrocatalyst for electrochemical water splitting","authors":"Sumanta Sahoo , Abdullah Al Mahmud , Ankur Sood , Ganesh Dhakal , Santosh K. Tiwari , Sunmi Zo , Hong Mi Kim , Sung Soo Han","doi":"10.1016/j.jsamd.2024.100843","DOIUrl":"10.1016/j.jsamd.2024.100843","url":null,"abstract":"<div><div>Bifunctional electrocatalysts have shown considerable research attention in the field of water splitting in the last few years. The current work reports a simple microwave (MW)-assisted synthetic approach for the fabrication of nanocomposite based on graphitic-C<sub>3</sub>N<sub>4</sub>, reduced graphene oxide (rGO), and MoS<sub>2</sub>. Notably, the ternary composite was synthesized through ultrafast MW irradiation within a short duration by a cost-effective synthetic route. The synthesized composite served as the suitable electrocatalyst for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The overpotential of the composite was 172 mV for HER and 380 mV for OER. Moreover, the Tafel slopes for HER and OER were 147 and 97 mV dec<sup>−1</sup> for HER and OER, respectively. It is further interesting to note that the composite also displayed admirable stability of 24 h for overall water splitting. Inclusively, the current work demonstrated an efficient rGO-supported MW-assisted inexpensive synthetic approach for the development of 2D bifunctional electrocatalysts.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 1","pages":"Article 100843"},"PeriodicalIF":6.7,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102326","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}
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