Nanomaterials最新文献

{"title":"Ni Nanoparticles Supported on Graphene-Based Materials as Highly Stable Catalysts for the Cathode of Alkaline Membrane Fuel Cells.","authors":"Sthephanie J Martínez, Raquel Cos-Hugas, Marco Bellini, Hamish A Miller, Alessandro Lavacchi, José Luis Rodríguez, Elena Pastor","doi":"10.3390/nano14211768","DOIUrl":"10.3390/nano14211768","url":null,"abstract":"<p><p>Ni nanoparticles supported on graphene-based materials were tested as catalysts for the oxygen reduction reaction (ORR) to be used in anion exchange membrane fuel cells (AEMFCs). The introduction of N into the graphene structure produced an enhancement of electrocatalytic activity by improving electron transfer and creating additional active sites for the ORR. Materials containing both N and S demonstrated the highest stability, showing only a 3% performance loss after a 10 h stability test and therefore achieving the best overall performance. This long-term durability is attributed to the synergetic effect of Ni nanoparticles and bi-doped (S/N)-reduced graphene oxide. The findings suggest that the strategic incorporation of both nitrogen and sulphur into the graphene structure plays a crucial role in optimising the electrocatalytic properties of Ni-based catalysts.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 21","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11547394/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142605544","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}

{"title":"Study of Hard Protein Corona on Lipid Surface of Composite Nanoconstruction.","authors":"Anna V Epanchintseva, Svetlana V Baranova, Julia E Poletaeva, Irina A Bakhno, Elena I Ryabchikova, Ilya S Dovydenko","doi":"10.3390/nano14211767","DOIUrl":"10.3390/nano14211767","url":null,"abstract":"<p><p>The composition of the protein corona covering any nanoparticle (NP) when it enters a biological fluid determines the parameters of the NP's interaction with the body. To \"control\" these parameters, it is important to know the composition of the protein corona, the determination of which is a complex task associated with the two-layer organization of the corona (hard and soft coronas). In a previous publication, we reported obtaining lipid-coated NPs with a full protein corona, isolating them, and proving the presence of the corona on the surface of the NPs. This work reports on the preparation, isolation, and purification of lipid-coated NPs bearing a hard corona. The protein corona composition was determined by using the LC-MS/MS method. Thirty-seven serum proteins were identified with a high degree of reliability. The hard corona contained various apolipoproteins, including apolipoprotein E, which can potentially affect the penetration of NPs into the cell.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 21","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11547845/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142605611","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}

{"title":"Synthesis of Needle-like CoO Nanowires Decorated with Electrospun Carbon Nanofibers for High-Performance Flexible Supercapacitors.","authors":"Xiang Zhang","doi":"10.3390/nano14211770","DOIUrl":"10.3390/nano14211770","url":null,"abstract":"<p><p>Needle-like CoO nanowires have been successfully synthesized by a facile hydrothermal process on an electrospun carbon nanofibers substrate. The as-prepared sample mesoporous CoO nanowires aligned vertically on the surface of carbon nanofibers and cross-linked with each other, producing loosely porous nanostructures. These hybrid composite electrodes exhibit a high specific capacitance of 1068.3 F g^-1 at a scan rate of 5 mV s^-1 and a good rate capability of 613.7 F g^-1 at a scan rate of 60 mV s^-1 in a three-electrode cell. The CoO NWs@CNF//CNT@CNF asymmetric device exhibits remarkable cycling stability and delivers a capacitance of 79.3 F/g with a capacitance retention of 92.1 % after 10,000 cycles. The asymmetric device delivers a high energy density of 37 Wh kg^-1 with a power density of 0.8 kW kg^-1 and a high power density of 16 kW kg^-1 with an energy density of 23 Wh kg^-1. This study demonstrated a promising strategy to enhance the electrochemical performance of flexible supercapacitors.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 21","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11547584/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142605695","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}

{"title":"Current Advances in Nanoelectronics, Nanosensors, and Devices.","authors":"Filippo Giubileo","doi":"10.3390/nano14211771","DOIUrl":"10.3390/nano14211771","url":null,"abstract":"<p><p>This Special Issue on \"Current Advances in Nanoelectronics, Nanosensors, and Devices\" collects cutting-edge research and comprehensive reviews in the rapidly evolving field of nanotechnology. This collection aims to highlight key breakthroughs in nanostructures, 2D materials, and their applications in nanoelectronics, nanosensors, and emerging device technologies.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 21","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11547765/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142605099","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}

{"title":"Deep Ultraviolet Excitation Photoluminescence Characteristics and Correlative Investigation of Al-Rich AlGaN Films on Sapphire.","authors":"Zhe Chuan Feng, Ming Tian, Xiong Zhang, Manika Tun Nafisa, Yao Liu, Jeffrey Yiin, Benjamin Klein, Ian Ferguson","doi":"10.3390/nano14211769","DOIUrl":"10.3390/nano14211769","url":null,"abstract":"<p><p>AlGaN is attractive for fabricating deep ultraviolet (DUV) optoelectronic and electronic devices of light-emitting diodes (LEDs), photodetectors, high-electron-mobility field-effect transistors (HEMTs), etc. We investigated the quality and optical properties of Al_xGa_1-xN films with high Al fractions (60-87%) grown on sapphire substrates, including AlN nucleation and buffer layers, by metal-organic chemical vapor deposition (MOCVD). They were initially investigated by high-resolution X-ray diffraction (HR-XRD) and Raman scattering (RS). A set of formulas was deduced to precisely determine x(Al) from HR-XRD data. Screw dislocation densities in AlGaN and AlN layers were deduced. DUV (266 nm) excitation RS clearly exhibits AlGaN Raman features far superior to visible RS. The simulation on the AlGaN longitudinal optical (LO) phonon modes determined the carrier concentrations in the AlGaN layers. The spatial correlation model (SCM) analyses on E₂(high) modes examined the AlGaN and AlN layer properties. These high-x(Al) Al_xGa_1-xN films possess large energy gaps E_g in the range of 5.0-5.6 eV and are excited by a DUV 213 nm (5.8 eV) laser for room temperature (RT) photoluminescence (PL) and temperature-dependent photoluminescence (TDPL) studies. The obtained RTPL bands were deconvoluted with two Gaussian bands, indicating cross-bandgap emission, phonon replicas, and variation with x(Al). TDPL spectra at 20-300 K of Al_0.87Ga_0.13N exhibit the T-dependences of the band-edge luminescence near 5.6 eV and the phonon replicas. According to the Arrhenius fitting diagram of the TDPL spectra, the activation energy (19.6 meV) associated with the luminescence process is acquired. In addition, the combined PL and time-resolved photoluminescence (TRPL) spectroscopic system with DUV 213 nm pulse excitation was applied to measure a typical AlGaN multiple-quantum well (MQW). The RT TRPL decay spectra were obtained at four wavelengths and fitted by two exponentials with fast and slow decay times of ~0.2 ns and 1-2 ns, respectively. Comprehensive studies on these Al-rich AlGaN epi-films and a typical AlGaN MQW are achieved with unique and significant results, which are useful to researchers in the field.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 21","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11547956/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142605102","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}

{"title":"Optimization of Thermoelectric Performance of Ag₂Te Films via a Co-Sputtering Method.","authors":"Hanwen Xu, Zhongzhao Zha, Fu Li, Guangxing Liang, Jingting Luo, Zhuanghao Zheng, Yue-Xing Chen","doi":"10.3390/nano14211762","DOIUrl":"10.3390/nano14211762","url":null,"abstract":"<p><p>Providing self-powered energy for wearable electronic devices is currently an important research direction in the field of thermoelectric (TE) thin films. In this study, a simple dual-source magnetron sputtering method was used to prepare Ag₂Te thin films, which exhibit good TE properties at room temperature, and the growth temperature and subsequent annealing process were optimized to obtain high-quality films. The experimental results show that films grown at a substrate temperature of 280 °C exhibit a high power factor (PF) of ~3.95 μW/cm·K² at room temperature, which is further improved to 4.79 μW/cm·K² after optimal annealing treatment, and a highest PF of ~7.85 μW/cm·K² was observed at 200 °C. Appropriate annealing temperature effectively increases the carrier mobility of the Ag₂Te films and adjusts the Ag/Te ratio to make the composition closer to the stoichiometric ratio, thus promoting the enhancement of electrical transport properties. A TE device with five legs was assembled using as-fabricated Ag₂Te thin films. With a temperature difference of 40 K, the device was able to generate an output voltage of approximately 14.43 mV and a corresponding power of about 50.52 nW. This work not only prepared a high-performance Ag₂Te film but also demonstrated its application prospects in the field of self-powered electronic devices.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 21","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11547814/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142605555","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}

{"title":"Enhancing the Thermal Stability of Skyrmion in Magnetic Nanowires for Nanoscale Data Storage.","authors":"Mohammed Al Bahri, Mohammed Al Hinaai, Rayya Al Balushi, Salim Al-Kamiyani","doi":"10.3390/nano14211763","DOIUrl":"10.3390/nano14211763","url":null,"abstract":"<p><p>Magnetic skyrmion random switching and structural stability are critical limitations for storage data applications. Enhancing skyrmions' magnetic properties could improve their thermal structural stability. Hence, micromagnetic calculation was carried out to explore the thermal nucleation and stability of skyrmions in magnetic nanodevices. Different magnetic properties such as uniaxial magnetic anisotropy energy (<i>Ku</i>), saturation magnetization (<i>Ms</i>) and Dzyaloshinskii-Moriya interaction (<i>DMI</i>) were used to assess the thermal stability of skyrmions in magnetic nanowires. For some values of <i>Ms</i> and <i>Ku</i>, the results verified that the skyrmion structure is stable at temperatures above 800 K, which is higher than room temperature. Additionally, manipulating the nanowire geometry was found to have a substantial effect on the thermal structural stability of the skyrmion in storage nanodevices. Increasing the nanowire dimensions, such as length or width, enhanced skyrmions' structural stability against temperature fluctuations in nanodevices. Furthermore, the random nucleation of the skyrmions due to the device temperature was examined. It was shown that random skyrmion nucleation occurs at temperature values greater than 700 K. These findings make skyrmion devices suitable for storage applications.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 21","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11547876/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142605289","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}

{"title":"An MIP-Based PFAS Sensor Exploiting Nanolayers on Plastic Optical Fibers for Ultra-Wide and Ultra-Low Detection Ranges-A Case Study of PFAS Detection in River Water.","authors":"Rosalba Pitruzzella, Alessandro Chiodi, Riccardo Rovida, Francesco Arcadio, Giovanni Porto, Simone Moretti, Gianfranco Brambilla, Luigi Zeni, Nunzio Cennamo","doi":"10.3390/nano14211764","DOIUrl":"10.3390/nano14211764","url":null,"abstract":"<p><p>In this work, a novel optical-chemical sensor for the detection of per- and polyfluorinated substances (PFASs) in a real scenario is presented. The proposed sensing approach exploits the multimode characteristics of plastic optical fibers (POFs) to achieve unconventional sensors via surface plasmon resonance (SPR) phenomena. The sensor is realized by the coupling of an SPR-POF platform with a novel chemical chip based on different polymeric nanolayers over the core of a D-shaped POF, one made up of an optical adhesive and one of a molecularly imprinted polymer (MIP) for PFAS. The chemical chip is used to launch the light into the SPR D-shaped POF platform, so the interaction between the analyte and the MIP's sites can be used to modulate the propagated light in the POFs and the SPR phenomena. Selectivity tests and dose-response curves by standard PFOA water solutions were carried out to characterize the detection range sensor response, obtaining a wide PFAS response range, from 1 ppt to 1000 ppt. Then, tests performed on river water samples collected from the Bormida river paved the way for the applicability of the proposed approach to a real scenario.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 21","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11547922/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142605070","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}

{"title":"From Structure to Sensing: Molecular Mechanistic Insights into Plant-Derived Carbon Dots for Heavy Metal Ion Detection.","authors":"Himanshi Soni, Vicky Jain, Suhas Ballal, Indang Ariati Ariffin, Mamata Chahar, Suman Saini, Monika Bhattu, Harbinder Singh, Mikhael Bechelany, Jagpreet Singh","doi":"10.3390/nano14211766","DOIUrl":"10.3390/nano14211766","url":null,"abstract":"<p><p>Plant-derived carbon dots (P-CDs) are gaining attention in environmental remediation due to their cost-effectiveness, availability, and lower toxicity compared with chemically synthesized carbon dots. This review comprehensively examines the recent advancements in the synthesis and application of P-CDs, with a particular emphasis on their efficacy in the sensing of heavy metals, which are among the most pervasive environmental contaminants. A detailed comparative analysis is presented by evaluating the performance of P-CDs against their chemically synthesized counterparts based on key parameters, such as optimal operating conditions and detection limits. Furthermore, sensing the potential of P-CDs towards every heavy metal ion has been discussed with in-depth mechanistic insights. Additionally, this review explores the industrial applications and future directions of P-CDs. This review provides a comprehensive analysis of -P-CDs for heavy metal sensing, aiming to enhance their sensitivity and selectivity toward heavy metal ions.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 21","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11547485/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142605344","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}

{"title":"Transition Metal-Doped Layered Iron Vanadate (FeV_3-xM_xO₉.2.6H₂O, M = Co, Mn, Ni, and Zn) for Enhanced Energy Storage Properties.","authors":"Mawuse Amedzo-Adore, Jeong In Han","doi":"10.3390/nano14211765","DOIUrl":"10.3390/nano14211765","url":null,"abstract":"<p><p>With its distinctive multiple electrochemical reaction, iron vanadate (FeV₃O₉.2.6H₂O) is considered as a promising electrode material for energy storage. However, it has a relatively low practical specific capacitance. Therefore, using the low temperature sol-gel synthesis process, transition metal doping was used to enhance the electrochemical performance of layered structured FeV₃O₉.2.6H₂O (FVO). According to this study, FVO doped with transition metals with larger interlayer spacing exhibited superior electrochemical performance than undoped FVO. The Mn-doped FVO electrode showed the highest specific capacitance and retention of 143 Fg^-1 and 87%, respectively, while the undoped FVO showed 78 Fg^-1 and 54%.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"14 21","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11547368/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142605702","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}