Nanomaterials最新文献_第2页

Colossal Dielectric Constant of Nanocrystalline/Amorphous Homo-Composite BaTiO₃ Films Deposited via Pulsed Laser Deposition Technique. 通过脉冲激光沉积技术沉积的纳米晶/非晶同质复合 BaTiO3 薄膜的巨大介电常数

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-10-18 DOI: 10.3390/nano14201677

Shinya Kondo, Taichi Murakami, Loick Pichon, Joël Leblanc-Lavoie, Takashi Teranishi, Akira Kishimoto, My Ali El Khakani

{"title":"Colossal Dielectric Constant of Nanocrystalline/Amorphous Homo-Composite BaTiO3 Films Deposited via Pulsed Laser Deposition Technique.","authors":"Shinya Kondo, Taichi Murakami, Loick Pichon, Joël Leblanc-Lavoie, Takashi Teranishi, Akira Kishimoto, My Ali El Khakani","doi":"10.3390/nano14201677","DOIUrl":"https://doi.org/10.3390/nano14201677","url":null,"abstract":"We report the pulsed laser deposition (PLD) of nanocrystalline/amorphous homo-composite BaTiO3 (BTO) films exhibiting an unprecedented combination of a colossal dielectric constant (εr) and extremely low dielectric loss (tan δ). By varying the substrate deposition temperature (Td) over a wide range (300-800 °C), we identified Td = 550 °C as the optimal temperature for growing BTO films with an εr as high as ~3060 and a tan δ as low as 0.04 (at 20 kHz). High-resolution transmission electron microscopy revealed that the PLD-BTO films consist of BTO nanocrystals (~20-30 nm size) embedded within an otherwise amorphous BTO matrix. The impressive dielectric behavior is attributed to the combination of highly crystallized small BTO nanograins, which amplify interfacial polarization, and the surrounding amorphous matrix, which effectively isolates the nanograins from charge carrier transport. Our findings could facilitate the development of next-generation integrated dielectric devices.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11510155/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142504471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rare-Earth Metal-Based Materials for Hydrogen Storage: Progress, Challenges, and Future Perspectives. 用于储氢的稀土金属基材料：进展、挑战和未来展望》。

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-10-18 DOI: 10.3390/nano14201671

Yaohui Xu, Xi Yang, Yuting Li, Yu Zhao, Xing Shu, Guoying Zhang, Tingna Yang, Yitao Liu, Pingkeng Wu, Zhao Ding

{"title":"Rare-Earth Metal-Based Materials for Hydrogen Storage: Progress, Challenges, and Future Perspectives.","authors":"Yaohui Xu, Xi Yang, Yuting Li, Yu Zhao, Xing Shu, Guoying Zhang, Tingna Yang, Yitao Liu, Pingkeng Wu, Zhao Ding","doi":"10.3390/nano14201671","DOIUrl":"https://doi.org/10.3390/nano14201671","url":null,"abstract":"Rare-earth-metal-based materials have emerged as frontrunners in the quest for high-performance hydrogen storage solutions, offering a paradigm shift in clean energy technologies. This comprehensive review delves into the cutting-edge advancements, challenges, and future prospects of these materials, providing a roadmap for their development and implementation. By elucidating the fundamental principles, synthesis methods, characterization techniques, and performance enhancement strategies, we unveil the immense potential of rare-earth metals in revolutionizing hydrogen storage. The unique electronic structure and hydrogen affinity of these elements enable diverse storage mechanisms, including chemisorption, physisorption, and hydride formation. Through rational design, nanostructuring, surface modification, and catalytic doping, the hydrogen storage capacity, kinetics, and thermodynamics of rare-earth-metal-based materials can be significantly enhanced. However, challenges such as cost, scalability, and long-term stability need to be addressed for their widespread adoption. This review not only presents a critical analysis of the state-of-the-art but also highlights the opportunities for multidisciplinary research and innovation. By harnessing the synergies between materials science, nanotechnology, and computational modeling, rare-earth-metal-based hydrogen storage materials are poised to accelerate the transition towards a sustainable hydrogen economy, ushering in a new era of clean energy solutions.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11510320/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142504511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanomaterials Toward CO₂ Reduction and Conversion. 减少和转化二氧化碳的纳米材料。

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-10-18 DOI: 10.3390/nano14201676

Rafael Camarillo

引用次数: 0

Using Femtosecond Laser Light to Investigate the Concentration- and Size-Dependent Nonlinear Optical Properties of Laser-Ablated CuO Quantum Dots. 利用飞秒激光研究激光刻蚀氧化铜量子点的浓度和尺寸非线性光学特性。

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-10-18 DOI: 10.3390/nano14201674

Mohamed Ashour, Rasha Ibrahim, Yasmin Abd El-Salam, Fatma Abdel Samad, Alaa Mahmoud, Tarek Mohamed

{"title":"Using Femtosecond Laser Light to Investigate the Concentration- and Size-Dependent Nonlinear Optical Properties of Laser-Ablated CuO Quantum Dots.","authors":"Mohamed Ashour, Rasha Ibrahim, Yasmin Abd El-Salam, Fatma Abdel Samad, Alaa Mahmoud, Tarek Mohamed","doi":"10.3390/nano14201674","DOIUrl":"https://doi.org/10.3390/nano14201674","url":null,"abstract":"In this work, the nonlinear optical (NLO) properties of CuO nanoparticles (CuO NPs) were studied experimentally using the pulsed laser ablation (PLA) technique. A nanosecond Nd: YAG laser was employed as the ablation excitation source to create CuO NPs in distilled water. Various CuO NPs samples were prepared at ablation periods of 20, 30, and 40 min. Utilizing HR-TEM, the structure of the synthesized CuO NPs samples was verified. In addition, a UV-VIS spectrophotometer was used to investigate the linear features of the samples. The Z-scan technique was utilized to explore the NLO properties of CuO NPs samples, including the nonlinear absorption coefficient (β) and nonlinear refractive index (n2). An experimental study on the NLO features was conducted at a variety of excitation wavelengths (750-850 nm), average excitation powers (0.8-1.2 W), and CuO NPs sample concentrations and sizes. The reverse saturable absorption (RSA) behavior of all CuO NPs samples differed with the excitation wavelength and average excitation power. In addition, the CuO NPs samples demonstrated excellent optical limiters at various excitation wavelengths, with limitations dependent on the size and concentration of CuO NPs.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11509968/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142504529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unraveling Oxygen Vacancies Effect on Chemical Composition, Electronic Structure and Optical Properties of Eu Doped SnO₂. 揭示氧空位对掺杂 Eu 的二氧化锡的化学组成、电子结构和光学特性的影响。

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-10-18 DOI: 10.3390/nano14201675

Maxim A Mashkovtsev, Anastasiya S Kosykh, Alexey V Ishchenko, Andrey V Chukin, Andrey I Kukharenko, Pavel A Troshin, Ivan S Zhidkov

{"title":"Unraveling Oxygen Vacancies Effect on Chemical Composition, Electronic Structure and Optical Properties of Eu Doped SnO2.","authors":"Maxim A Mashkovtsev, Anastasiya S Kosykh, Alexey V Ishchenko, Andrey V Chukin, Andrey I Kukharenko, Pavel A Troshin, Ivan S Zhidkov","doi":"10.3390/nano14201675","DOIUrl":"https://doi.org/10.3390/nano14201675","url":null,"abstract":"The influence of Eu doping (0.5, 1 and 2 mol.%) and annealing in an oxygen-deficient atmosphere on the structure and optical properties of SnO2 nanoparticles were investigated in relation to electronic structure. The X-ray diffraction (XRD) patterns revealed single-phase tetragonal rutile structure for both synthesized and annealed Eu-doped SnO2 samples, except for the annealed sample with 2 mol.% Eu. The results of X-ray photoelectron spectroscopy (XPS) emphasized that europium incorporated into the SnO2 host lattice with an oxidation state of 3+, which was accompanied by the formation of oxygen vacancies under cation substitution of tetravalent Sn. Moreover, XPS spectra showed the O/Sn ratio, which has been reduced under annealing for creating additional oxygen vacancies. The pulse cathodoluminescence (PCL) demonstrated the concentration dependence of Eu site symmetry. Combination of XRD, XPS and PCL revealed that Eu doping and following annealing induce strongly disordering of the SnO2 crystal lattice. Our findings provide new insight into the interaction of rare-earth metals (Eu) with host SnO2 matrix and new evidence for the importance of oxygen vacancies for optical and electronic structure formation.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11509938/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142504526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the Potential of Bimetallic PtPd/C Cathode Catalysts to Enhance the Performance of PEM Fuel Cells. 探索双金属 PtPd/C 阴极催化剂提高 PEM 燃料电池性能的潜力。

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-10-18 DOI: 10.3390/nano14201672

Vladimir Guterman, Anastasia Alekseenko, Sergey Belenov, Vladislav Menshikov, Elizaveta Moguchikh, Irina Novomlinskaya, Kirill Paperzh, Ilya Pankov

{"title":"Exploring the Potential of Bimetallic PtPd/C Cathode Catalysts to Enhance the Performance of PEM Fuel Cells.","authors":"Vladimir Guterman, Anastasia Alekseenko, Sergey Belenov, Vladislav Menshikov, Elizaveta Moguchikh, Irina Novomlinskaya, Kirill Paperzh, Ilya Pankov","doi":"10.3390/nano14201672","DOIUrl":"https://doi.org/10.3390/nano14201672","url":null,"abstract":"Bimetallic platinum-containing catalysts are deemed promising for electrolyzers and proton-exchange membrane fuel cells (PEMFCs). A significant number of laboratory studies and commercial offers are related to PtNi/C and PtCo/C electrocatalysts. The behavior of PtPd/C catalysts has been studied much less, although palladium itself is the metal closest to platinum in its properties. Using a series of characterization methods, this paper presents a comparative study of structural characteristics of the commercial PtPd/C catalysts containing 38% wt. of precious metals and the well-known HiSpec4000 Pt/C catalyst. The electrochemical behavior of the catalysts was studied both in a three-electrode electrochemical cell and in the membrane electrode assemblies (MEAs) of hydrogen-air PEMFCs. Both PtPd/C samples demonstrated higher values of the electrochemically active surface area, as well as greater specific and mass activity in the oxygen reduction reaction in comparison with conventional Pt/C, while not being inferior to the latter in durability. The MEA based on the best of the PtPd/C catalysts also exhibited higher performance in single tests and long-term durability testing. The results of this study conducted indicate the prospects of using bimetallic PtPd/C materials for cathode catalysts in PEMFCs.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11510532/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142504485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Peptide-Conjugated Vascular Endothelial Extracellular Vesicles Encapsulating Vinorelbine for Lung Cancer Targeted Therapeutics. 包裹长春瑞滨的肽结合血管内皮细胞外囊泡用于肺癌靶向治疗。

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-10-17 DOI: 10.3390/nano14201669

Isha Gaurav, Abhimanyu Thakur, Kui Zhang, Sudha Thakur, Xin Hu, Zhijie Xu, Gaurav Kumar, Ravindran Jaganathan, Ashok Iyaswamy, Min Li, Ge Zhang, Zhijun Yang

{"title":"Peptide-Conjugated Vascular Endothelial Extracellular Vesicles Encapsulating Vinorelbine for Lung Cancer Targeted Therapeutics.","authors":"Isha Gaurav, Abhimanyu Thakur, Kui Zhang, Sudha Thakur, Xin Hu, Zhijie Xu, Gaurav Kumar, Ravindran Jaganathan, Ashok Iyaswamy, Min Li, Ge Zhang, Zhijun Yang","doi":"10.3390/nano14201669","DOIUrl":"https://doi.org/10.3390/nano14201669","url":null,"abstract":"Lung cancer is one of the major cancer types and poses challenges in its treatment, including lack of specificity and harm to healthy cells. Nanoparticle-based drug delivery systems (NDDSs) show promise in overcoming these challenges. While conventional NDDSs have drawbacks, such as immune response and capture by the reticuloendothelial system (RES), extracellular vesicles (EVs) present a potential solution. EVs, which are naturally released from cells, can evade the RES without surface modification and with minimal toxicity to healthy cells. This makes them a promising candidate for developing a lung-cancer-targeting drug delivery system. EVs isolated from vascular endothelial cells, such as human umbilical endothelial-cell-derived EVs (HUVEC-EVs), have shown anti-angiogenic activity in a lung cancer mouse model; therefore, in this study, HUVEC-EVs were chosen as a carrier for drug delivery. To achieve lung-cancer-specific targeting, HUVEC-EVs were engineered to be decorated with GE11 peptides (GE11-HUVEC-EVs) via a postinsertional technique to target the epidermal growth factor receptor (EGFR) that is overexpressed on the surface of lung cancer cells. The GE11-HUVEC-EVs were loaded with vinorelbine (GE11-HUVEC-EVs-Vin), and then characterized and evaluated in in vitro and in vivo lung cancer models. Further, we examined the binding affinity of ABCB1, encoding P-glycoprotein, which plays a crucial role in chemoresistance via the efflux of the drug. Our results indicate that GE11-HUVEC-EVs-Vin effectively showed tumoricidal effects against cell and mouse models of lung cancer.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11510406/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142504508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advanced Nanomaterials in Biomedical Applications (2nd Edition). 生物医学应用中的先进纳米材料（第 2 版）》。

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-10-17 DOI: 10.3390/nano14201668

Goran N Kaluđerović, Nebojša Đ Pantelić

引用次数: 0

DNA: Novel Crystallization Regulator for Solid Polymer Electrolytes in High-Performance Lithium-Ion Batteries. DNA：高性能锂离子电池中固体聚合物电解质的新型结晶调节剂。

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-10-17 DOI: 10.3390/nano14201670

Xiong Cheng, Joonho Bae

{"title":"DNA: Novel Crystallization Regulator for Solid Polymer Electrolytes in High-Performance Lithium-Ion Batteries.","authors":"Xiong Cheng, Joonho Bae","doi":"10.3390/nano14201670","DOIUrl":"https://doi.org/10.3390/nano14201670","url":null,"abstract":"In this work, we designed a novel polyvinylidene fluoride (PVDF)@DNA solid polymer electrolyte, wherein DNA, as a plasticizer-like additive, reduced the crystallinity of the solid polymer electrolyte and improved its ionic conductivity. At the same time, due to its Lewis acid effect, DNA promotes the dissociation of lithium salts when interacting with lithium salt anions and can also fix the anions, creating more free lithium ions in the electrolyte and thus improving its ionic conductivity. However, owing to hydrogen bonding between DNA and PVDF, excess DNA occupies the lone pairs of electrons of the fluorine atoms on the PVDF molecular chains, affecting the conduction of lithium ions and the conductivity of the solid electrolyte. Hence, in this study, we investigated the effects of adding different DNA amounts to solid polymer electrolytes. The results show that 1% DNA addition resulted in the best improvement in the electrochemical performance of the electrolyte, demonstrating a high ionic conductivity of 3.74 × 10-5 S/cm (25 °C). The initial capacity reached 120 mAh/g; moreover, after 500 cycles, the all-solid-state batteries exhibited a capacity retention of approximately 71%, showing an outstanding cycling performance.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11510397/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142504476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mandarin Peels-Derived Carbon Dots: A Multifaceted Fluorescent Probe for Cu(II) Detection in Tap and Drinking Water Samples. 柑橘皮衍生碳点：一种用于自来水和饮用水样本中铜（II）检测的多元荧光探针。

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2024-10-17 DOI: 10.3390/nano14201666

Marwa El-Azazy, Alaa AlReyashi, Khalid Al-Saad, Nessreen Al-Hashimi, Mohammad A Al-Ghouti, Mohamed F Shibl, Abdulrahman Alahzm, Ahmed S El-Shafie

{"title":"Mandarin Peels-Derived Carbon Dots: A Multifaceted Fluorescent Probe for Cu(II) Detection in Tap and Drinking Water Samples.","authors":"Marwa El-Azazy, Alaa AlReyashi, Khalid Al-Saad, Nessreen Al-Hashimi, Mohammad A Al-Ghouti, Mohamed F Shibl, Abdulrahman Alahzm, Ahmed S El-Shafie","doi":"10.3390/nano14201666","DOIUrl":"https://doi.org/10.3390/nano14201666","url":null,"abstract":"Carbon dots (CDs) derived from mandarin peel biochar (MBC) at different pyrolysis temperatures (200, 400, 600, and 800 °C) have been synthesized and characterized. This high-value transformation of waste materials into fluorescent nanoprobes for environmental monitoring represents a step forward towards a circular economy. In this itinerary, CDs produced via one-pot hydrothermal synthesis were utilized for the detection of copper (II) ions. The study looked at the spectroscopic features of biochar-derived CDs. The selectivity of CDs obtained from biochar following carbonization at 400 °C (MBC400-CDs towards various heavy metal ions resulted in considerable fluorescence quenching with copper (II) ions, showcasing their potential as selective detectors. Transmission electron microscopic (TEM) analysis validated the MBC-CDs' consistent spherical shape, with a particle size of <3 nm. The Plackett-Burman Design (PBD) was used to study three elements that influence the F0/F ratio, with the best ratio obtained with a pH of 10, for 10 min, and an aqueous reaction medium. Cu (II) was detected over a dynamic range of 4.9-197.5 μM and limit of detection (LOD) of 0.01 μM. Validation testing proved the accuracy and precision for evaluating tap and mountain waters with great selectivity and no interference from coexisting metal ions.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11509961/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142504498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0