Pub Date : 2024-10-07DOI: 10.1016/j.nxnano.2024.100108
Abdul Wahab Jatoi , Faisal Ahmed Memon , Muhammad Ishaque Abro
The transmittable infectious diseases, detrimental environmental contaminants and harmful UV radiations remained constant threat to human civilization. Cold, pneumonia, tuberculosis bacteria, rubella virus, RSV and COVID19, then urban and industrial emissions, volcanic eruptions, pollen, aerosols on one hand and skin cancer, sunburn, premature ageing and skin tanning on the other hand are some of the examples of serious risks to health, safety and well-being. The WHO reported over 7million worldwide deaths due to hazardous air contaminants. Exploiting the tremendous features of nanofiberous structure and excellent microbiocidal properties of Ag0 and CuO nanoparticles, a sustainable and stable nanofiber based composite Bmb-nanoNP was developed. Utilization of biocompatible, biodegradable, nontoxic and environmental friendly polymers enabled the composite as sustainable source for protective clothing purposes. The microparticulate filtration of Bmb-nanoNP was 99.13 % and 96 % with and without air suction respectively. The microbiocidal affect against E. coli and S. aureus strains was excellent(5.9 % and 8.86 % cell viabilities respectively). Similarly, the Bmb-nanoNP showed calculated UV protection factor (UPF) of 7954 (50 + rating).These characteristics demonstrated potential candidacy of the Bmb-nanoNP composite for multi-functional safety clothing applications.
{"title":"Nanofiberous composite with CuO-Ag0 supported on bamboo/lycra for protection against transmittable infectious diseases","authors":"Abdul Wahab Jatoi , Faisal Ahmed Memon , Muhammad Ishaque Abro","doi":"10.1016/j.nxnano.2024.100108","DOIUrl":"10.1016/j.nxnano.2024.100108","url":null,"abstract":"<div><div>The transmittable infectious diseases, detrimental environmental contaminants and harmful UV radiations remained constant threat to human civilization. C<em>old, pneumonia, tuberculosis bacteria, rubella virus, RSV and COVID19, then urban and industrial emissions,</em> volcanic eruptions, pollen, aerosols on one hand and skin cancer, sunburn, premature ageing and skin tanning on the other hand are some of the examples of serious risks to health, safety and well-being. The WHO reported over 7million worldwide deaths due to hazardous air contaminants. Exploiting the tremendous features of nanofiberous structure and excellent microbiocidal properties of Ag<sup>0</sup> and CuO nanoparticles, a sustainable and stable nanofiber based composite Bmb-nanoNP was developed. Utilization of biocompatible, biodegradable, nontoxic and environmental friendly polymers enabled the composite as sustainable source for protective clothing purposes. The microparticulate filtration of Bmb-nanoNP was 99.13 % and 96 % with and without air suction respectively. The microbiocidal affect against <em>E. coli</em> and <em>S. aureus</em> strains was excellent(5.9 % and 8.86 % cell viabilities respectively). Similarly, the Bmb-nanoNP showed calculated UV protection factor (UPF) of 7954 (50 + rating).These characteristics demonstrated potential candidacy of the Bmb-nanoNP composite for multi-functional safety clothing applications.</div></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100108"},"PeriodicalIF":0.0,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142427762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-07DOI: 10.1016/j.nxnano.2024.100112
Yuansen Liu , Qi Wu , Xinqing Zheng , Min Nie
With rapid development of global marine aquaculture, large amounts of waste shellfish as an aquaculture by-product are generated after consumption. At present, waste seashell powder (WSP) as fillers mixed with polymers is a potentially efficient method to add-value recycle WSP, but the poorly compatibility and seriously agglomeration of WSP results in the low mechanical properties and then reduces the value of recycled shell-based products. In this study, a facile ball-milling exfoliation method with the assistance of polyethyleneimine (PEI) to exfoliate shell materials into high-quality shell nanosheets (SNs) is present. In this case, PEI macromolecular had dual function: it not only acted as a buffer between milling balls and WSP to prevent excessive breaking of the WSP, but also interacted with active bonds on the surface to functionalize the SNs. As a demonstration, the high quality SNs achieve an average lateral size of 414 nm and thickness of 5 nm. Furthermore, the grafting of hydroxyl and amine functional groups onto the SNs, along with the low surface energy of the resulting SNs, has the potential to enhance interfacial interactions with the polymer matrix, thus promoting the overall performance of shell-based composites. This work presents a green and scalable approach for the value-added recycling of waste seashells, offering a sustainable solution to address the environmental impact of aquaculture by-products.
随着全球海水养殖业的快速发展，大量废弃贝类作为养殖副产品被消耗后产生。目前，将废弃贝壳粉（WSP）作为填料与聚合物混合是实现废弃贝壳粉增值再利用的一种潜在有效方法，但由于废弃贝壳粉相容性差、团聚严重，导致其机械性能低下，进而降低了再生贝壳基产品的价值。本研究采用球磨剥离法，在聚乙烯亚胺（PEI）的辅助下将贝壳材料剥离成高质量的贝壳纳米片（SN）。在这种情况下，聚乙烯亚胺大分子具有双重功能：它不仅在研磨球和 WSP 之间起缓冲作用，防止 WSP 过度破碎，还能与表面的活性键相互作用，使 SN 功能化。结果表明，高质量 SN 的平均横向尺寸为 414 nm，厚度为 5 nm。此外，羟基和胺官能团接枝到 SNs 上，加上所产生 SNs 的低表面能，有可能增强与聚合物基体的界面相互作用，从而提高壳基复合材料的整体性能。这项工作为废弃贝壳的增值回收提供了一种绿色、可扩展的方法，为解决水产养殖副产品对环境的影响提供了一种可持续的解决方案。
{"title":"A scalable exfoliating approach to achieve high-quality shell nanosheets with large lateral size and surface functionalization","authors":"Yuansen Liu , Qi Wu , Xinqing Zheng , Min Nie","doi":"10.1016/j.nxnano.2024.100112","DOIUrl":"10.1016/j.nxnano.2024.100112","url":null,"abstract":"<div><div>With rapid development of global marine aquaculture, large amounts of waste shellfish as an aquaculture by-product are generated after consumption. At present, waste seashell powder (WSP) as fillers mixed with polymers is a potentially efficient method to add-value recycle WSP, but the poorly compatibility and seriously agglomeration of WSP results in the low mechanical properties and then reduces the value of recycled shell-based products. In this study, a facile ball-milling exfoliation method with the assistance of polyethyleneimine (PEI) to exfoliate shell materials into high-quality shell nanosheets (SNs) is present. In this case, PEI macromolecular had dual function: it not only acted as a buffer between milling balls and WSP to prevent excessive breaking of the WSP, but also interacted with active bonds on the surface to functionalize the SNs. As a demonstration, the high quality SNs achieve an average lateral size of 414 nm and thickness of 5 nm. Furthermore, the grafting of hydroxyl and amine functional groups onto the SNs, along with the low surface energy of the resulting SNs, has the potential to enhance interfacial interactions with the polymer matrix, thus promoting the overall performance of shell-based composites. This work presents a green and scalable approach for the value-added recycling of waste seashells, offering a sustainable solution to address the environmental impact of aquaculture by-products.</div></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100112"},"PeriodicalIF":0.0,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142427763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the present work, we investigate the influence of cobalt (Co) doping on the structural and magnetic properties of cobalt-doped silicon carbide (Co-SiC) thin films. The films were fabricated using DC/RF magnetron sputtering technique on Si (100) substrates at a temperature of 1200°C, with varying Co concentrations ranging from 5 to 16 at. (at%. X-ray diffraction (XRD) analysis unveiled the co-existence of CoSi2 and SiC phases in all the thin films. Surface morphological study through atomic force microscopy (AFM) revealed the densely packed nature of the films. Field emission scanning electron microscopy (FE-SEM) study showed that particles are uniformly distributed at the surface of the substrate. According to UV measurements, the films have high transmittance in the visible range, and as Co concentration rises, transmittance decreases. A magnetic phase transition from superparamagnetic to ferromagnetic behavior occurred with Co content surpassing 8 at% in the SiC thin films. Moreover, an increase in coercivity was observed from 38 Oe to 316 Oe as the doping concentration increased from 10 to 16 at%. This study represents an exploration into the induction of ferromagnetism through moderate Co doping in SiC thin films.
{"title":"Tailoring of magnetic phase: Co-doped SiC thin films grown by RF sputtering","authors":"Mukesh Kumar , Amit Kumar Singh , Ashwani Kumar , Rinku Kumar , Yogendra K. Gautam , Sarat Kumar Dash , Ramesh Chandra","doi":"10.1016/j.nxnano.2024.100110","DOIUrl":"10.1016/j.nxnano.2024.100110","url":null,"abstract":"<div><div>In the present work, we investigate the influence of cobalt (Co) doping on the structural and magnetic properties of cobalt-doped silicon carbide (Co-SiC) thin films. The films were fabricated using DC/RF magnetron sputtering technique on Si (100) substrates at a temperature of 1200°C, with varying Co concentrations ranging from 5 to 16 at. (at%. X-ray diffraction (XRD) analysis unveiled the co-existence of CoSi<sub>2</sub> and SiC phases in all the thin films. Surface morphological study through atomic force microscopy (AFM) revealed the densely packed nature of the films. Field emission scanning electron microscopy (FE-SEM) study showed that particles are uniformly distributed at the surface of the substrate. According to UV measurements, the films have high transmittance in the visible range, and as Co concentration rises, transmittance decreases. A magnetic phase transition from superparamagnetic to ferromagnetic behavior occurred with Co content surpassing 8 at% in the SiC thin films. Moreover, an increase in coercivity was observed from 38 Oe to 316 Oe as the doping concentration increased from 10 to 16 at%. This study represents an exploration into the induction of ferromagnetism through moderate Co doping in SiC thin films.</div></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100110"},"PeriodicalIF":0.0,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142427761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, a simple and efficient non-covalent functionalization method was developed to introduce conducting polymer of P3HT onto pristine MWCNT and hydroxyl MWCNT surfaces without causing significant changes in electrical characteristics, especially if used as a sensing material. Electron microscopy (FE-SEM) and (HR-TEM) were used to examine the surface morphology of nanocomposites, which demonstrated that the MWCNTs were well wrapped by P3HT. EDX analysis showed interactions between MWCNT-OH and P3HT, with a higher sulfur content of 7.77 wt% from P3HT. Additionally, the diameters of both pristine MWCNT (24.46 nm) and MWCNT-OH (27.56 nm) increased significantly when they form nanocomposites (35.35 nm and 39.40 nm respectively). Further characterization of the produced P3HT-MWCNT nanocomposite was performed using FT-IR and Raman spectroscopy. It was discovered that MWCNTs were dispersed uniformly, with a substantial interaction between P3HT and MWCNTs. The introduction of malathion on the surface of the nanocomposites reveals interaction between P3HT and malathion via intermolecular hydrogen bonding of thiophene, as evidenced by inelastic neutron scattering (INS) spectroscopy, suggesting that the P3HT/MWCNT has the potential as a promising sensing material for organophosphate compounds detection.
{"title":"Structural and morphological studies of non-covalent functionalization carbon nanotubes wrapped poly(3-hexylthiophene-2,5-diyl) nanocomposites","authors":"N. Abdullah , N.M. Nurazzi , I.P. Silverwood , S.K. Matam , S.Z.N. Demon , N.S.N. Sa'aya , N.A. Halim , K.W. Baharin","doi":"10.1016/j.nxnano.2024.100111","DOIUrl":"10.1016/j.nxnano.2024.100111","url":null,"abstract":"<div><div>In this study, a simple and efficient non-covalent functionalization method was developed to introduce conducting polymer of P3HT onto pristine MWCNT and hydroxyl MWCNT surfaces without causing significant changes in electrical characteristics, especially if used as a sensing material. Electron microscopy (FE-SEM) and (HR-TEM) were used to examine the surface morphology of nanocomposites, which demonstrated that the MWCNTs were well wrapped by P3HT. EDX analysis showed interactions between MWCNT-OH and P3HT, with a higher sulfur content of 7.77 wt% from P3HT. Additionally, the diameters of both pristine MWCNT (24.46 nm) and MWCNT-OH (27.56 nm) increased significantly when they form nanocomposites (35.35 nm and 39.40 nm respectively). Further characterization of the produced P3HT-MWCNT nanocomposite was performed using FT-IR and Raman spectroscopy. It was discovered that MWCNTs were dispersed uniformly, with a substantial interaction between P3HT and MWCNTs. The introduction of malathion on the surface of the nanocomposites reveals interaction between P3HT and malathion via intermolecular hydrogen bonding of thiophene, as evidenced by inelastic neutron scattering (INS) spectroscopy, suggesting that the P3HT/MWCNT has the potential as a promising sensing material for organophosphate compounds detection.</div></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100111"},"PeriodicalIF":0.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142427760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-02DOI: 10.1016/j.nxnano.2024.100109
Pathy B. Lokole , Galilée G. Byamungu , Paulin K. Mutwale , Nadège K. Ngombe , Michel K. Mpuza , Virima Mudogo , Rui W.M. Krause , Christian I. Nkanga
Nanoparticles (NPs) have been extensively used as smart vehicles for the target delivery of therapeutic, immunotherapeutic, and diagnostic agents. The versatility of NPs applications partly arises from the possibility of manufacturing various NPs types depending on the nature of starting materials. In most cases, amphiphilic materials such as phospholipids, solid lipids, fatty acid derivatives, and blends of oils/surfactants, are used to make distinct NPs, namely liposomes, solid lipid nanoparticles (SLNs), nanostructured lipid carriers (NLCs), micelles, and nanoemulsions, respectively. In the pipeline of raw materials, saponins have emerged as a promising alternative for NPs formulation. Saponins are plant-derived secondary metabolites (phytochemicals) with excellent amphiphilic properties, which allow them to play crucial roles in nanotechnology, including their usage as reagents for micellar preparation as well as stabilizing agents for several NPs. Saponin-based NPs have been used to improve the solubility, and pharmacological profile of various active ingredients, encompassing vaccines, owing to inherent immunostimulant/adjuvant properties of saponins. In this review, we mainly discuss the state of the art in biomedical and pharmaceutical applications of saponin-containing NPs, focusing on using saponins as raw materials to make original NPs or as adjuvants for improving already established NPs. The physicochemical properties of saponins have been highlighted, before describing putative nano-formulations with huge promise for drug delivery and vaccine development. The opportunities and challenges pertaining to saponins-containing NPs have been pointed out to set the stage for establishing saponins as an intriguing raw material for the effective translational development of revolutionary nanomedicines.
{"title":"A review of saponin-based nanocarriers for drug delivery","authors":"Pathy B. Lokole , Galilée G. Byamungu , Paulin K. Mutwale , Nadège K. Ngombe , Michel K. Mpuza , Virima Mudogo , Rui W.M. Krause , Christian I. Nkanga","doi":"10.1016/j.nxnano.2024.100109","DOIUrl":"10.1016/j.nxnano.2024.100109","url":null,"abstract":"<div><div>Nanoparticles (NPs) have been extensively used as smart vehicles for the target delivery of therapeutic, immunotherapeutic, and diagnostic agents. The versatility of NPs applications partly arises from the possibility of manufacturing various NPs types depending on the nature of starting materials. In most cases, amphiphilic materials such as phospholipids, solid lipids, fatty acid derivatives, and blends of oils/surfactants, are used to make distinct NPs, namely liposomes, solid lipid nanoparticles (SLNs), nanostructured lipid carriers (NLCs), micelles, and nanoemulsions, respectively. In the pipeline of raw materials, saponins have emerged as a promising alternative for NPs formulation. Saponins are plant-derived secondary metabolites (phytochemicals) with excellent amphiphilic properties, which allow them to play crucial roles in nanotechnology, including their usage as reagents for micellar preparation as well as stabilizing agents for several NPs. Saponin-based NPs have been used to improve the solubility, and pharmacological profile of various active ingredients, encompassing vaccines, owing to inherent immunostimulant/adjuvant properties of saponins. In this review, we mainly discuss the state of the art in biomedical and pharmaceutical applications of saponin-containing NPs, focusing on using saponins as raw materials to make original NPs or as adjuvants for improving already established NPs. The physicochemical properties of saponins have been highlighted, before describing putative nano-formulations with huge promise for drug delivery and vaccine development. The opportunities and challenges pertaining to saponins-containing NPs have been pointed out to set the stage for establishing saponins as an intriguing raw material for the effective translational development of revolutionary nanomedicines.</div></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100109"},"PeriodicalIF":0.0,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142427759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-21DOI: 10.1016/j.nxnano.2024.100107
Shashikana Paria, Prasenjit Maity
A luminescent trimetiallic nanocluster (NCs) stabilized by BSA protein (AuAgCd-BSA) was synthesized along with its mono and bimetallic counterparts (Au-BSA and AuAg-BSA). The detail characterization and comparative luminescence sensing performance for narcotic drugs and psychotropic substance (amphetamine, morphine) were performed for these three clusters. It was revealed that the trimetallic cluster can detect amphetamine and morphine drugs through turn on luminescence response. The calculated binding constants are found to be Ka = 5.86× 103 M−1 for Amphetamine and 3.75× 103 M−1 for Morphine by using Benesi-Hildebrand equation. The trimetallic cluster also showed selective turn off luminescence response in presence of mercury (Hg2+) ions. The origin of the enhanced PL responses in presence of amphetamine and morphine was further investigated by exploring the PL lifetime decay studies, which reveals that larger excited state lifetime (in μs timescale) value of pristine cluster remain unchanged upon incremental addition of drugs leading to longer interaction time with the analytes. Thus, the present work undoubtedly establishes the superior drug sensing behaviour of AuAgCd-BSA tri-metallic NCs as compared to its mono-metallic and bi-metallic counterparts and open further emphasis on exploring luminescence-based sensing of narcotic drugs which has great forensic relevance.
{"title":"Luminescence sensing of narcotic drugs by a BSA protein stabilized AuAgCd trimetallic nanocluster","authors":"Shashikana Paria, Prasenjit Maity","doi":"10.1016/j.nxnano.2024.100107","DOIUrl":"10.1016/j.nxnano.2024.100107","url":null,"abstract":"<div><p>A luminescent trimetiallic nanocluster (NCs) stabilized by BSA protein (AuAgCd-BSA) was synthesized along with its mono and bimetallic counterparts (Au-BSA and AuAg-BSA). The detail characterization and comparative luminescence sensing performance for narcotic drugs and psychotropic substance (amphetamine, morphine) were performed for these three clusters. It was revealed that the trimetallic cluster can detect amphetamine and morphine drugs through turn on luminescence response. The calculated binding constants are found to be <em>K</em><sub>a</sub> = 5.86× 10<sup>3</sup> M<sup>−1</sup> for Amphetamine and 3.75× 10<sup>3</sup> M<sup>−1</sup> for Morphine by using Benesi-Hildebrand equation. The trimetallic cluster also showed selective turn off luminescence response in presence of mercury (Hg<sup>2+</sup>) ions. The origin of the enhanced PL responses in presence of amphetamine and morphine was further investigated by exploring the PL lifetime decay studies, which reveals that larger excited state lifetime (in μs timescale) value of pristine cluster remain unchanged upon incremental addition of drugs leading to longer interaction time with the analytes. Thus, the present work undoubtedly establishes the superior drug sensing behaviour of AuAgCd-BSA tri-metallic NCs as compared to its mono-metallic and bi-metallic counterparts and open further emphasis on exploring luminescence-based sensing of narcotic drugs which has great forensic relevance.</p></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100107"},"PeriodicalIF":0.0,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949829524000688/pdfft?md5=bcb9957161202b16e8e683a51dabcdaa&pid=1-s2.0-S2949829524000688-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142272476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-16DOI: 10.1016/j.nxnano.2024.100103
Constantino Fernandes-Neto , Erika Bronze-Uhle , Leonardo Francisco Gonçalves Dias , Fabio Antonio Piola Rizzante , Paulo Noronha Lisboa-Filho , Adilson Yoshio Furuse
Zirconia has become a popular choice for indirect restorations; however, adhesion to this material remains a challenge. The present study aimed to evaluate surface characteristics and bond strength to tetragonal Y-TZP and cubic Y-PSZ zirconia submitted to experimental surface treatments. Specimens of Y-TZP (T) and Y-PSZ (P) were prepared and divided into groups: Tf-A) thin TiO2 film functionalized with 3-(aminopropyl)trimethoxysilane (APTMS); Tf) thin TiO2 film; MNt-A) manual application of TiO2 nanotubes with APTMS; MNt) manual application of TiO2 nanotubes; VNt-A) vacuum application of TiO2 nanotubes with APTMS; VNt) vacuum application of TiO2 nanotubes; C) control with Al2O3 sandblasting. Characterization with x-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) was done. Bond strength was evaluated by microshear bond strength (µSBS). Data were analyzed by two-way ANOVA and Tukey’s HSD tests (α = 0.05). XPS showed signals for elements O 1 s, Ti 2p, and Zr 3d 5/2. In addition, high-resolution demonstrated Ti-O-Si and Zr-O-Si bonding for treatments with TiO2 and APTMS for T-Tf-A/P-Tf-A. SEM presented a homogeneous film for T-Tf/T-Tf-A/P-Tf/P-Tf-A and cluster formations for all nanotube groups. Control groups for both Y-TZP and Y-PSZ showed clear surfaces. No differences of µSBS were seen between experimental surface treatments and the controls, except for T-MNt-A/T-VNt-A/P-MNt-A/P-VNt-A, which showed the lowest mean µSBS and highest incidence of pre-test failures. Surface treatments with TiO2 nanostructures were effective in modifying the surface of both zirconia materials evaluated, providing strong covalent bonds, changes to the surface topology, and shear bond strength comparable to conventional sandblasting protocols.
{"title":"Surface treatments with TiO2 nanostructures for bonding to zirconia materials as an alternative to conventional airborne-particle abrasion of the surface","authors":"Constantino Fernandes-Neto , Erika Bronze-Uhle , Leonardo Francisco Gonçalves Dias , Fabio Antonio Piola Rizzante , Paulo Noronha Lisboa-Filho , Adilson Yoshio Furuse","doi":"10.1016/j.nxnano.2024.100103","DOIUrl":"10.1016/j.nxnano.2024.100103","url":null,"abstract":"<div><p>Zirconia has become a popular choice for indirect restorations; however, adhesion to this material remains a challenge. The present study aimed to evaluate surface characteristics and bond strength to tetragonal Y-TZP and cubic Y-PSZ zirconia submitted to experimental surface treatments. Specimens of Y-TZP (T) and Y-PSZ (P) were prepared and divided into groups: Tf-A) thin TiO<sub>2</sub> film functionalized with 3-(aminopropyl)trimethoxysilane (APTMS); Tf) thin TiO<sub>2</sub> film; MNt-A) manual application of TiO<sub>2</sub> nanotubes with APTMS; MNt) manual application of TiO<sub>2</sub> nanotubes; VNt-A) vacuum application of TiO<sub>2</sub> nanotubes with APTMS; VNt) vacuum application of TiO<sub>2</sub> nanotubes; C) control with Al<sub>2</sub>O<sub>3</sub> sandblasting. Characterization with x-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) was done. Bond strength was evaluated by microshear bond strength (µSBS). Data were analyzed by two-way ANOVA and Tukey’s HSD tests (α = 0.05). XPS showed signals for elements O 1 s, Ti 2p, and Zr 3d 5/2. In addition, high-resolution demonstrated Ti-O-Si and Zr-O-Si bonding for treatments with TiO<sub>2</sub> and APTMS for T-Tf-A/P-Tf-A. SEM presented a homogeneous film for T-Tf/T-Tf-A/P-Tf/P-Tf-A and cluster formations for all nanotube groups. Control groups for both Y-TZP and Y-PSZ showed clear surfaces. No differences of µSBS were seen between experimental surface treatments and the controls, except for T-MNt-A/T-VNt-A/P-MNt-A/P-VNt-A, which showed the lowest mean µSBS and highest incidence of pre-test failures. Surface treatments with TiO<sub>2</sub> nanostructures were effective in modifying the surface of both zirconia materials evaluated, providing strong covalent bonds, changes to the surface topology, and shear bond strength comparable to conventional sandblasting protocols.</p></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100103"},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949829524000640/pdfft?md5=e74ebd3b7feb0128513fbcdd9607b907&pid=1-s2.0-S2949829524000640-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142240799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Caffeic acid, a potent polyphenol belonging to the hydroxycinnamic acid derivative class, was utilized in the synthesis of silver nanoparticles (AgNPs) at ambient temperature. The resultant conjugates underwent comprehensive characterization employing various analytical techniques, including UV–visible spectroscopy, FTIR, RAMAN spectroscopy, dynamic light scattering (DLS) for size and zeta potential analysis, atomic force microscopy (AFM), and scanning electron microscopy (SEM). Through these analyses, the morphological characteristics of the synthesized nanoparticles were elucidated, providing valuable insights into their structural properties. Subsequently, the cytotoxic effects of the caffeic acid-synthesized silver nanoparticles were assessed against A549 cells over a 48-h period by MTT assay. Remarkably, these nanoparticles exhibited significant toxicity towards the cells, with inhibitory effects observed at concentrations of 141 μg/ml for CA AgNPs. This underscores their potential as potent agents against cancer cells. Furthermore, the profound significance of caffeic acid-synthesized silver nanoparticles was evaluated specifically against A549 lung cancer cells. This was corroborated through cell cycle analysis, which demonstrated the potent anticancer activity of the caffeic acid-synthesized silver nanoparticles. Such findings suggest promising prospects for their utilization in diverse cancer treatment modalities. Overall, the successful synthesis and characterization of caffeic acid-synthesized silver nanoparticles underscore their potential as potent agents against cancer, particularly in combating A549 lung cancer cells. Further research and exploration into their mechanisms of action and potential synergistic effects with existing anticancer therapies could unveil additional avenues for their clinical translation and utilization in cancer management.
{"title":"Caffeic acid functionalized silver nanoparticles: A bionanoformulation and its assessment of cell cycle and in vitro cytotoxicity","authors":"Sangeetha Pushpanathan , Showket yahya , Amsaveni Gunasekaran , Sathan Raj Natarajan , Kayilainayaki Kannan , Kathiravan Krishnan","doi":"10.1016/j.nxnano.2024.100105","DOIUrl":"10.1016/j.nxnano.2024.100105","url":null,"abstract":"<div><p>Caffeic acid, a potent polyphenol belonging to the hydroxycinnamic acid derivative class, was utilized in the synthesis of silver nanoparticles (AgNPs) at ambient temperature. The resultant conjugates underwent comprehensive characterization employing various analytical techniques, including UV–visible spectroscopy, FTIR, RAMAN spectroscopy, dynamic light scattering (DLS) for size and zeta potential analysis, atomic force microscopy (AFM), and scanning electron microscopy (SEM). Through these analyses, the morphological characteristics of the synthesized nanoparticles were elucidated, providing valuable insights into their structural properties. Subsequently, the cytotoxic effects of the caffeic acid-synthesized silver nanoparticles were assessed against A549 cells over a 48-h period by MTT assay. Remarkably, these nanoparticles exhibited significant toxicity towards the cells, with inhibitory effects observed at concentrations of 141 μg/ml for CA AgNPs. This underscores their potential as potent agents against cancer cells. Furthermore, the profound significance of caffeic acid-synthesized silver nanoparticles was evaluated specifically against A549 lung cancer cells. This was corroborated through cell cycle analysis, which demonstrated the potent anticancer activity of the caffeic acid-synthesized silver nanoparticles. Such findings suggest promising prospects for their utilization in diverse cancer treatment modalities. Overall, the successful synthesis and characterization of caffeic acid-synthesized silver nanoparticles underscore their potential as potent agents against cancer, particularly in combating A549 lung cancer cells. Further research and exploration into their mechanisms of action and potential synergistic effects with existing anticancer therapies could unveil additional avenues for their clinical translation and utilization in cancer management.</p></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100105"},"PeriodicalIF":0.0,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949829524000664/pdfft?md5=9247219ae7cadd0a89f02eb40bd67711&pid=1-s2.0-S2949829524000664-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142228813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-12DOI: 10.1016/j.nxnano.2024.100104
Nimish Kumar , Anjali Singh , Vijay Devra
Here, we describe the phytosynthesis of nickel nanoparticles (NiNPs) utilizing an extract from the leaves of Azadirachta indica as a reducing and capping agent. The optimal conditions for synthesizing stable NiNPs were pH 6.8, temperature 70°C, and 5 % leaf extract and [NiNO3.6H2O] = 1.0×10−3 mol dm−3. The X-ray diffraction (XRD) analysis revealed a face-centered cubic crystalline structure, and the Transmission Electron Microscope (TEM) and Scanning Electron Microscope (SEM) analyses verified a triangular form with particles ranging in size from 7 to 18 nm. The study examined the impact of reactant concentrations, reaction temperature, and solution pH on the nickel nanoparticle fabrication method. The following are the ideal parameters for synthesis: 5 % leaf extract, pH = 6.8, temperature = 70 °C, and [NiNO3.6H2O] = 1.0×10−3 mol dm−3. Plant biomolecules induce the reduction of nickel ions to NiNPs and function as a capping and stabilizing agent, as confirmed by the FTIR technique. The findings indicated that the synthesis of NiNPs from A. indica leaf extracts are safe technology and may have significant impacts on the industrial synthesis of metallic nanoparticles.
{"title":"Experimental investigation on plant extract-induced biosynthesis of Nickel nanoparticles","authors":"Nimish Kumar , Anjali Singh , Vijay Devra","doi":"10.1016/j.nxnano.2024.100104","DOIUrl":"10.1016/j.nxnano.2024.100104","url":null,"abstract":"<div><p>Here, we describe the phytosynthesis of nickel nanoparticles (NiNPs) utilizing an extract from the leaves of Azadirachta indica as a reducing and capping agent. The optimal conditions for synthesizing stable NiNPs were pH 6.8, temperature 70°C, and 5 % leaf extract and [NiNO<sub>3</sub>.6H<sub>2</sub>O] = 1.0×10<sup>−3</sup> mol dm<sup>−3</sup>. The X-ray diffraction (XRD) analysis revealed a face-centered cubic crystalline structure, and the Transmission Electron Microscope (TEM) and Scanning Electron Microscope (SEM) analyses verified a triangular form with particles ranging in size from 7 to 18 nm. The study examined the impact of reactant concentrations, reaction temperature, and solution pH on the nickel nanoparticle fabrication method. The following are the ideal parameters for synthesis: 5 % leaf extract, pH = 6.8, temperature = 70 °C, and [NiNO<sub>3</sub>.6H<sub>2</sub>O] = 1.0×10<sup>−3</sup> mol dm<sup>−3</sup>. Plant biomolecules induce the reduction of nickel ions to NiNPs and function as a capping and stabilizing agent, as confirmed by the FTIR technique. The findings indicated that the synthesis of NiNPs from A. indica leaf extracts are safe technology and may have significant impacts on the industrial synthesis of metallic nanoparticles.</p></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100104"},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949829524000652/pdfft?md5=db91375cf9c2572af8cb7de515711868&pid=1-s2.0-S2949829524000652-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142168535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-11DOI: 10.1016/j.nxnano.2024.100102
George G. Njema, Joshua K. Kibet
The increasing demand for renewable energy has stimulated significant advancements in the photovoltaic technology (PV), with perovskite solar cells (PSCs) emerging as leading alternatives because of their impressive efficiency and versatile characteristics. Nevertheless, conventional lead-based PSCs face critical challenges such as environmental instability, lead toxicity, and limited durability, which hinder their broader commercial applications. Chalcogenide-based perovskites, on the other hand have been advanced as promising options, offering improved stability, less toxic compositions, and the potential for more cost-effective, scalable production. This review thoroughly examines the progress made in chalcogenide perovskite research, highlighting their tunable bandgaps for diverse applications, superior charge transport properties, and resilience against advanced weathering conditions such as moisture, oxygen, and UV light. The graphene-like characteristics of certain chalcogenide perovskites, which contribute to their high charge mobility and flexibility, make them strong candidates for the next-generation PV technologies. Furthermore, this work explores the expanding potential for indoor applications of these materials, including their integration into flexible indoor PSCs and other optoelectronic devices designed for controlled environments. Also, various synthesis and optimization strategies, such as advanced deposition techniques, precise doping methods, and innovative interface and additive engineering are presented, aimed at enhancing the PV performance of these materials. Accordingly, this review bridges the gap between fundamental research and practical applications, outlining a strategic direction for developing chalcogenide-based PSCs and optoelectronic devices that meet the global energy demand while advancing sustainability and environmental safety.
{"title":"A review of chalcogenide-based perovskites as the next novel materials: Solar cell and optoelectronic applications, catalysis and future perspectives","authors":"George G. Njema, Joshua K. Kibet","doi":"10.1016/j.nxnano.2024.100102","DOIUrl":"10.1016/j.nxnano.2024.100102","url":null,"abstract":"<div><p>The increasing demand for renewable energy has stimulated significant advancements in the photovoltaic technology (PV), with perovskite solar cells (PSCs) emerging as leading alternatives because of their impressive efficiency and versatile characteristics. Nevertheless, conventional lead-based PSCs face critical challenges such as environmental instability, lead toxicity, and limited durability, which hinder their broader commercial applications. Chalcogenide-based perovskites, on the other hand have been advanced as promising options, offering improved stability, less toxic compositions, and the potential for more cost-effective, scalable production. This review thoroughly examines the progress made in chalcogenide perovskite research, highlighting their tunable bandgaps for diverse applications, superior charge transport properties, and resilience against advanced weathering conditions such as moisture, oxygen, and UV light. The graphene-like characteristics of certain chalcogenide perovskites, which contribute to their high charge mobility and flexibility, make them strong candidates for the next-generation PV technologies. Furthermore, this work explores the expanding potential for indoor applications of these materials, including their integration into flexible indoor PSCs and other optoelectronic devices designed for controlled environments. Also, various synthesis and optimization strategies, such as advanced deposition techniques, precise doping methods, and innovative interface and additive engineering are presented, aimed at enhancing the PV performance of these materials. Accordingly, this review bridges the gap between fundamental research and practical applications, outlining a strategic direction for developing chalcogenide-based PSCs and optoelectronic devices that meet the global energy demand while advancing sustainability and environmental safety.</p></div>","PeriodicalId":100959,"journal":{"name":"Next Nanotechnology","volume":"7 ","pages":"Article 100102"},"PeriodicalIF":0.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949829524000639/pdfft?md5=dd3ed0170f165e8d903bbbbe631861b2&pid=1-s2.0-S2949829524000639-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142168534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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