Nanomaterials最新文献_第9页

Optimization of Soft X-Ray Fresnel Zone Plate Fabrication Through Joint Electron Beam Lithography and Cryo-Etching Techniques. 通过电子束光刻和低温蚀刻联合技术优化软 X 射线菲涅尔区板的制作。

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-11-26 DOI: 10.3390/nano14231898

Maha Labani, Vito Clericò, Enrique Diez, Giancarlo Gatti, Mario Amado, Ana Pérez-Rodríguez

{"title":"Optimization of Soft X-Ray Fresnel Zone Plate Fabrication Through Joint Electron Beam Lithography and Cryo-Etching Techniques.","authors":"Maha Labani, Vito Clericò, Enrique Diez, Giancarlo Gatti, Mario Amado, Ana Pérez-Rodríguez","doi":"10.3390/nano14231898","DOIUrl":"https://doi.org/10.3390/nano14231898","url":null,"abstract":"The ability to manufacture complex 3D structures with nanometer-scale resolution, such as Fresnel Zone Plates (FZPs), is crucial to achieve state-of-the-art control in X-ray sources for use in a diverse range of cutting-edge applications. This study demonstrates a novel approach combining Electron Beam Lithography (EBL) and cryoetching to produce silicon-based FZP prototypes as a test bench to assess the strong points and limitations of this fabrication method. Through this method, we obtained FZPs with 100 zones, a diameter of 20 µm, and an outermost zone width of 50 nm, resulting in a high aspect ratio that is suitable for use across a range of photon energies. The process incorporates a chromium mask in the EBL stage, enhancing microstructure precision and mitigating pattern collapse challenges. This minimized issues of under- and over-etching, producing well-defined patterns with a nanometer-scale resolution and low roughness. The refined process thus holds promise for achieving improved optical resolution and efficiency in FZPs, making it viable for the fabrication of high-performance, nanometer-scale devices.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 23","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142837617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Semiconductor Nanomaterials for Optoelectronic Applications. 用于光电应用的半导体纳米材料。

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-11-26 DOI: 10.3390/nano14231896

Ikai Lo

引用次数: 0

Surface-Functionalised Copper Oxide Nanoparticles: A Pathway to Multidrug-Resistant Pathogen Control in Medical Devices.

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-11-26 DOI: 10.3390/nano14231899

James Hall, Subbareddy Mekapothula, Rebecca Coxhill, Dominic Craske, Adam M Varney, Gareth W V Cave, Samantha McLean

引用次数: 0

Enhancing the Performance and Stability of Li-CO₂ Batteries Through LAGTP Solid Electrolyte and MWCNT/Ru Cathode Integration. 通过 LAGTP 固体电解质和 MWCNT/Ru 阴极集成提高锂-CO2 电池的性能和稳定性。

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-11-26 DOI: 10.3390/nano14231894

Dan Na, Dohyeon Yu, Hwan Kim, Baeksang Yoon, David D Lee, Inseok Seo

{"title":"Enhancing the Performance and Stability of Li-CO2 Batteries Through LAGTP Solid Electrolyte and MWCNT/Ru Cathode Integration.","authors":"Dan Na, Dohyeon Yu, Hwan Kim, Baeksang Yoon, David D Lee, Inseok Seo","doi":"10.3390/nano14231894","DOIUrl":"https://doi.org/10.3390/nano14231894","url":null,"abstract":"Li-CO2 batteries (LCBs) have emerged as promising solutions for energy storage, with the added benefit of contributing to carbon neutrality by capturing and utilizing CO2 during operation. In this study, a high-performance LCB was developed using a Ge-doped LiAlGeTi (PO4)3 (LAGTP) solid electrolyte, which was synthesized via a solution-based method by doping Ge into NASICON-type LATP. The ionic conductivity of the LAGTP pellets was measured as 1.04 × 10-3 S/cm at 25 °C. The LCB utilizing LAGTP and an MWCNT/Ru cathode maintained a stable cycling performance over 200 cycles at a current density of 100 mA/g, with a cut-off capacity of 500 mAh/g. Post-cycle analysis confirmed the reversible electrochemical reactions at the cathode. The integration of LAGTP as a solid electrolyte effectively enhanced the ionic conductivity and improved the cycle life and performance of the LCB. This study highlights the potential of Ge-doped NASICON-type solid electrolytes for advanced energy-storage technologies and offers a pathway for developing sustainable and high-performance LCBs.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 23","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142837982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanisms of Chromium Removal from Water and Soil Using Bioleached Nano Zero-Valent Iron-Mediated Biochar via Co-Pyrolysis.

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-11-26 DOI: 10.3390/nano14231895

Zhiyi Liu, Shuhong Zhou, Yubing Cai, Xuehai Zhang, Muhammad Shaaban, Qi-An Peng, Yajun Cai

{"title":"Mechanisms of Chromium Removal from Water and Soil Using Bioleached Nano Zero-Valent Iron-Mediated Biochar via Co-Pyrolysis.","authors":"Zhiyi Liu, Shuhong Zhou, Yubing Cai, Xuehai Zhang, Muhammad Shaaban, Qi-An Peng, Yajun Cai","doi":"10.3390/nano14231895","DOIUrl":"https://doi.org/10.3390/nano14231895","url":null,"abstract":"Biological charcoal loaded with nano zero-valent iron (nZVI@BC) was synthesized using the bioleaching co-pyrolysis method. This study analyzed the formulation sequence of nZVI@BC and its influence on chromium elimination from water and soil, along with the involved mechanisms. The bioleaching method facilitated ionic iron incorporation onto biochar in the form of yellow potassium ferroalum compounds, which were reduced to Fe0 by H2, CO, and CH4 generated during biomass co-pyrolysis. In aqueous conditions, the removal capacity of Cr(VI) by nZVI@BC increased by 72.01% and 66.92% compared to biochar (BC) and biochar-bioleachate composite (BBC), respectively. Under optimal conditions, nZVI@BC eliminated 90.11% of 20 mg/L Cr(VI), with experimental data fitting the Freundlich and pseudo-second-order kinetic models. The nZVI@BC also showed a passivation effect on chromium in soil; after 45 days, the exchangeable state of chromium was reduced by 12.89%, while the residual state increased by 10.45%. This enhancement in chromium elimination from soil was evident, as the residual state increased more for nZVI@BC (10.45%) than for BC alone (9.67% and 8.48%). Soil physicochemical properties and microbial community abundance improved as well. Cr(VI) removal mechanisms involved adsorption, reduction, and co-precipitation in water, while soil mechanisms included surface adsorption, electrostatic attraction, ion exchange, and complexation. The synthesis of nZVI@BC offers a novel method for creating iron-modified materials to effectively remove Cr(VI).","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 23","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142838077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Synthesis of Granular ZSM-23 Zeolite with a High Degree of Crystallinity and a Micro-Meso-Macroporous Structure, and Its Use in the Hydroisomerization of n-Hexadecane.

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-11-26 DOI: 10.3390/nano14231897

Olga S Travkina, Dmitry V Serebrennikov, Rezeda Z Kuvatova, Alfira N Khazipova, Nadezhda A Filippova, Marat R Agliullin, Boris I Kutepov

引用次数: 0

Elongated Particles Show a Preferential Uptake in Invasive Cancer Cells.

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-11-25 DOI: 10.3390/nano14231891

Talya Cohen, Chalom Zemmour, Ora T Cohen, Ofra Benny

{"title":"Elongated Particles Show a Preferential Uptake in Invasive Cancer Cells.","authors":"Talya Cohen, Chalom Zemmour, Ora T Cohen, Ofra Benny","doi":"10.3390/nano14231891","DOIUrl":"https://doi.org/10.3390/nano14231891","url":null,"abstract":"Mechanically driven cellular preference for drug carriers can enhance selectivity in cancer therapy, underscoring the importance of understanding the physical aspects of particle uptake. In this study, it was hypothesized that elongated particles might be preferentially taken up by deformable, aggressive cancer cells compared to normal cells. Two film-stretching methods were tested for 0.8-2.4 μm polystyrene (PS) particles: one based on solubility in organic solvents and the other on heat-induced softening. The heat-induced method produced more homogenous particle batches, with a standard deviation in the particle aspect ratio of 0.42 compared to 0.91 in the solvent-based method. The ability of cells to engulf elongated PS particles versus spherical particles was assessed in two subsets of human melanoma A375 cells. In the more aggressive cancer cell subset (A375+), uptake of elongated PS particles increased by 10% compared to spherical particles. In contrast, the less aggressive subset (A375-) showed a 25% decrease in uptake of elongated particles. This resulted in an uptake ratio between A375+ and A375- that was 1.5 times higher for elongated PS particles than for spherical ones. To further demonstrate relevance to drug delivery, elongated paclitaxel-loaded biodegradable, slow-releasing poly(lactic-co-glycolic) acid (PLGA) particles were synthesized. No significant difference in cytotoxic effect was observed between A375+ and A375- cells treated with spherical drug-loaded particles. However, treatment with ellipsoidal particles led to a significantly enhanced cytotoxic effect in aggressive cells compared to less aggressive cells. These findings present promising directions for tailored cancer drug delivery and demonstrate the importance of particle physical properties in cellular uptake and drug delivery mechanisms.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 23","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142837844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Excitonic-Vibrational Interaction at 2D Material/Organic Molecule Interfaces Studied by Time-Resolved Sum Frequency Generation. 通过时间分辨和频发生研究二维材料/有机分子界面上的激子-振动相互作用。

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-11-25 DOI: 10.3390/nano14231892

Huiling Chen, Yu Lian, Tao Zhou, Hui Li, Jiashi Li, Xinyi Liu, Yuan Huang, Wei-Tao Liu

{"title":"Excitonic-Vibrational Interaction at 2D Material/Organic Molecule Interfaces Studied by Time-Resolved Sum Frequency Generation.","authors":"Huiling Chen, Yu Lian, Tao Zhou, Hui Li, Jiashi Li, Xinyi Liu, Yuan Huang, Wei-Tao Liu","doi":"10.3390/nano14231892","DOIUrl":"https://doi.org/10.3390/nano14231892","url":null,"abstract":"The hybrid heterostructures formed between two-dimensional (2D) materials and organic molecules have gained great interest for their potential applications in advanced photonic and optoelectronic devices, such as solar cells and biosensors. Characterizing the interfacial structure and dynamic properties at the molecular level is essential for realizing such applications. Here, we report a time-resolved sum-frequency generation (TR-SFG) approach to investigate the hybrid structure of polymethyl methacrylate (PMMA) molecules and 2D transition metal dichalcogenides (TMDCs). By utilizing both infrared and visible light, TR-SFG can provide surface-specific information about both molecular vibrations and electronic transitions simultaneously. Our setup employed a Bragg grating for generating both a narrowband probe and an ultrafast pump pulse, along with a synchronized beam chopper and Galvo mirror combination for real-time spectral normalization, which can be readily incorporated into standard SFG setups. Applying this technique to the TMDC/PMMA interfaces yielded structural information regarding PMMA side chains and dynamic responses of both PMMA vibrational modes and TMDC excitonic transitions. We further observed a prominent enhancement effect of the PMMA vibrational SF amplitude for about 10 times upon the resonance with TMDC excitonic transition. These findings lay a foundation for further investigation into interactions at the 2D material/organic molecule interfaces.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 23","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142837984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Innovative Carbonaceous Materials and Metal/Metal Oxide Nanoparticles for Electrochemical Biosensor Applications.

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-11-25 DOI: 10.3390/nano14231890

Keshavananda Prabhu Channabasavana Hundi Puttaningaiah

{"title":"Innovative Carbonaceous Materials and Metal/Metal Oxide Nanoparticles for Electrochemical Biosensor Applications.","authors":"Keshavananda Prabhu Channabasavana Hundi Puttaningaiah","doi":"10.3390/nano14231890","DOIUrl":"https://doi.org/10.3390/nano14231890","url":null,"abstract":"Electrochemical biosensors have emerged as predominant devices for sensitive, rapid, and specific sensing of biomolecules, with significant applications in clinical diagnostics, environmental observation, and food processing. The improvement of inventive materials, especially carbon-based materials, and metal/metal oxide nanoparticles (M/MONPs), has changed the impact of biosensing, improving the performance and flexibility of electrochemical biosensors. Carbon-based materials, such as graphene, carbon nanotubes, and carbon nanofibers, have excellent electrical conductivity, a high surface area, large pore size, and good biocompatibility, making them ideal electrocatalysts for biosensor applications. Furthermore, M and MONPs have highly effective synergistic, electronic, and optical properties that influence signal transduction, selectivity, and sensitivity. This study completely explored continuous progressions and upgrades in carbonaceous materials (CBN materials) and M/MONPs for electrochemical biosensor applications. It analyzed the synergistic effects of hybrid nanocomposites that combine carbon materials with metal nanoparticles (MNPs) and their part in upgrading sensor performance. The paper likewise incorporated the surface alteration procedures and integration of these materials into biosensor models. The study examined difficulties, requirements, and possibilities for executing these innovative materials in practical contexts. This overview aimed to provide specialists with insights into the most recent patterns in the materials study of electrochemical biosensors and advance further progressions in this dynamic sector.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 23","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142838048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanograting p-n Junctions with Enhanced Charge Confinement. 具有增强电荷约束的纳米雾化 p-n 结。

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-11-24 DOI: 10.3390/nano14231889

Avtandil Tavkhelidze, Larisa Jangidze, Givi Skhiladze, Sergo Sikharulidze, Kristine Dzneladze, Rusudan Kvesitadze, Amiran Bibilashvili

{"title":"Nanograting p-n Junctions with Enhanced Charge Confinement.","authors":"Avtandil Tavkhelidze, Larisa Jangidze, Givi Skhiladze, Sergo Sikharulidze, Kristine Dzneladze, Rusudan Kvesitadze, Amiran Bibilashvili","doi":"10.3390/nano14231889","DOIUrl":"https://doi.org/10.3390/nano14231889","url":null,"abstract":"Recently, geometry-induced quantum effects in a new quasi-1D system, or nanograting (NG) layers, were introduced and investigated. Dramatic changes in band structure and unconventional photoluminescence effects were found in silicon quantum wells with high-energy barriers. Nanograting metal-semiconductor junctions were fabricated and investigated. Here, we report the latest results on a special type of p-n junction in which the charge confinement of the NG is enhanced. The reverse bias dark current is increased in contrast to the metal-semiconductor junctions. When such a junction works as a photovoltaic cell, NG significantly increases short-circuit current and conversion efficiency without affecting open-circuit voltage. These effects are explained by the formation of geometry-induced excitons. To distinguish exciton formation from G-doping effects, we fabricated NGs in both n-type and p-type top layers and obtained qualitatively the same results. To further verify the excitonic mechanism, we analyzed photoluminescence spectrums previously obtained from NG and other NG-like periodic structures. The collected experimental results and previous findings are well explained by the formation of geometry-induced excitons and corresponding quasi-flat bands. Geometry-induced quantum effects can be used to significantly increase the conversion efficiency of photovoltaic cells and enhance the characteristics of other optoelectronic devices.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 23","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142837005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0