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Bimetallic Single‑Atom Catalysts for Water Splitting

Nano-Micro Letters 2025年第1期17卷 1-45页

作者： Megha A.Deshmukh Aristides Bakandritsos Radek Zbořil nanotechnology centre Centre for Energy and Environmental TechnologiesVŠB–Technical University of Ostrava17.listopadu 2172/1570800 Ostrava‑PorubaCzech Republic Regional centre of Advanced Technologies and Materials Czech Advanced Technology and Research Institute(CATRIN)Palacky University OlomoucŠlechtitelů241/2778371 Olomouc–HoliceCzech Republic

Green hydrogen from water splitting has emerged as a critical energy vector with the potential to spearhead the global transition to a fossil fuel-independent *** field of catalysis has been revolutionized by single-atom catalysts(SACs),which exhibit unique and intricate interactions between atomically dispersed metal atoms and their ***,bimetallic SACs(bimSACs)have garnered significant attention for leveraging the synergistic functions of two metal ions coordinated on appropriately designed *** offer an avenue for rich metal–metal and metal–support cooperativity,potentially addressing current limitations of SACs in effectively furnishing transformations which involve synchronous proton–electron exchanges,substrate activation with reversible redox cycles,simultaneous multi-electron transfer,regulation of spin states,tuning of electronic properties,and cyclic transition states with low activation *** review aims to encapsulate the growing advancements in bimSACs,with an emphasis on their pivotal role in hydrogen generation via water *** subsequently delve into advanced experimental methodologies for the elaborate characterization of SACs,elucidate their electronic properties,and discuss their local coordination ***,we present comprehensive discussion on the deployment of bimSACs in both hydrogen evolution reaction and oxygen evolution reaction,the two half-reactions of the water electrolysis process.

关键词： Single-atom catalysts Single-atom dimers Hydrogen evolution Oxygen evolution Water splitting

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Optoelectronic and electrochemical behaviour of γ-CuI thin films prepared by solid iodination process

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Progress in Natural Science:Materials International 2019年第5期29卷 533-540页

作者： Karthik Kumar Chinnakutti Vengatesh Panneerselvam Durai Govindarajan Ajith kumar Soman Kuppusami Parasuraman Shyju Thankaraj Salammal centre of Excellence for Energy Research Sathyabama Institute of Science and Technology centre for nanoscience and nanotechnology Sathyabama Institute of Science and Technology

A simple and efficient solid iodination method has been proposed for the fabrication of p-type γ-CuI thin *** structural,morphological,optical,electrical and electrochemical properties have been investigated in order to serve as an effective hole-transporting layer in solid-state solar *** fabricated films exhibited p-type conductivity with resistivity of 7.0×10;Ωcm,the hole concentration of ～1.13×10;cm;and the mobility of 18.34 cm;V;s;.The cyclic voltammetry result shows a maximum specific capacitance of 43 mF/cm;at a scan rate of 10 mV/*** cyclic stability and capacitance retention were found to be 99.7%.These findings demonstrate that γ-CuI film can be a potential candidate for multiple applications,such as a hole transporting material for solid-state solar cells and electrochemical supercapacitor.

关键词： Copper iodide Solid iodination Hole mobility Cyclic voltammetry

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Selective nano-buckling improves the performance of graphene logic transistors

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National Science Review 2024年第2期11卷 95-96页

作者： Tong Yang Ming Yang Department of Applied Physics The Hong Kong Polytechnic University Research centre for nanoscience and nanotechnology The Hong Kong Polytechnic University

The massive integration of silicon-based transistors into modern electronic devices greatly increases power consumption and heat generation/dissipation[1]. In this concern, transistors based on atomically-thin graphene that exhibit high electric and thermoelectric conductivities with negligible contact resistance,

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Recent developments in self-powered smart chemical sensors for wearable electronics

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Nano Research 2021年第11期14卷 3669-3689页

作者： Aaryashree Surjit Sahoo Pravin Walke Saroj Kumar Nayak Chandra Sekhar Rout Dattatray J.Late Shibaura Institute of Technology Koto-CityTokyo135-8548Japan School of Basic Sciences Indian Institute of Technology BhubaneswarJatniOdisha752050India National centre for nanosciences and nanotechnology University of MumbaiMumbaiMaharashtra400098India centre for Nano and Material Sciences Jain UniversityRamanagaramBangalore562112India centre for nanoscience&nanotechnology Amity University MaharashtraMumbai-Pune ExpresswayBhatanPost—SomathnePanvelMaharashtra410206India

The next generation of electronics technology is purely going to be based on wearable sensing systems. Wearable electronic sensors that can operate in a continuous and sustainable manner without the need of an external power sources, are essential for portable and mobile electronic applications. In this review article, the recent progress and advantages of wearable self-powered smart chemical sensors systems for wearable electronics are presented. An overview of various modes of energy conversion and storage technologies for self-powered devices is provided. Self-powered chemical sensors (SPCS) systems with integrated energy units are then discussed, separated as solar cell-based SPCS, triboelectric nano-generators based SPCS, piezoelectric nano-generators based SPCS, energy storage device based SPCS, and thermal energy-based SPCS. Finally, the outlook on future prospects of wearable chemical sensors in self-powered sensing systems is addressed.

关键词： chemical sensors self-powered wearable electronics smart sensors

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A multiple-labelling method for cells using Au nanoparticles with different shapes

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Chinese Science Bulletin 2013年第21期58卷 2640-2645页

作者： ZHANG Ke FENG JianTao SUN QuanMei JIN Lin LI Jing WU XiaoChun HAN Dong Chinese Academy of Sciences Key Laboratory of Standardisation and Measurement for nanotechnology National Centre for Nanoscience and Technology Laboratory for Biological Effects of Nanomaterials and Nanosafety National Centre for Nanoscience and Technology

An important and difficult issue is simultaneously identifying the detailed locations of various molecules on the cell surface, as this identification requires a synergistic effect between more than one molecule in a living cell. Au nanoparticles (NPs) with different shapes can be readily recognised under low vacuum scanning electron microscopy (lvSEM). Anisotropic Au nanorods (NRs) possess unique surface plasmon resonance (SPR) properties, which can be further utilised for two photon luminescence (TPL) and other optical imaging techniques. In this paper, Au NRs and Au nanooctahedra (Au NOs) are introduced as biomarkers for ICAM-1 and Integrin β1. Combined with the advantages of lvSEM, this multiple-labelling method is a new method for studying the interactions between specific, functional molecules.

关键词：金纳米粒子细胞表面形状扫描电子显微镜标签表面等离激元 ICAM-1 自然保护区

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Room-temperature tracking of chiral recognition process at the single-molecule level

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Nano Research 2015年第11期8卷 3505-3511页

作者： Ruilin Xu Juan Liu Feng Chen Nianhua Liu Yingxiang Cai Xiaoqing Liu Xin Song Mingdong Dong Li Wang Department of Physics Nanchang University Nanchang 330031 China nanoscience and nanotechnology Laboratory Institute for Advanced Study Nanchang University Nanchang 330031 China Interdisciplinary nanoscience Center Centre for DNA Nanotechnology (CDNA) Aarhus University Aarhus C 8000 Denmark

The molecular-level identification of a chiral recognition process of phthalocyanine （Pc） was studied on a Cu（100） surface by scanning tunneling microscopy （STM）. STM revealed that a chiral Pc molecule forms a series of metastable dimer configurations with other Pc molecules. Eventually, the Pc molecule recognizes another Pc molecule with the same chirality to form a stable dimer configuration. Homochiral dimers were found on the Cu surface, demonstrating the chiral specificity of Pc dimerization. The mechanism for this chiral recognition process is identified, disclosing the critical role of the particular adsorption geometry of the chiral dimers on the Cu surface.

关键词： chirality recognition scanning tunneling microscopy dynamic process

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Synthesis and photoluminescence properties of zinc sulfide nanoparticles doped with copper using effective surfactants

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Particuology 2013年第5期11卷 566-573页

作者： G.Murugadoss centre for nanoscience and Technology Anna University

Zinc sulfide （ZnS）, various concentrations of Cu2＋（0.25%-1.25%）-doped ZnS and ZnS：Cu2~ nanoparticles capped with various surfactants have been successfully synthesized by a chemical precipitation method in ambient air at 80 ~C. The synthesized particles were characterized by UV-visible absorption （UV-vis）, X-ray diffraction （XRD）, transmission electron microscopy （TEM）, and Fourier transform infrared （FT-1R） and photoluminescence （PL） spectroscopy. The absorption peaks of the synthesized nanoparticles were noticeably blue-shifted from the bulk material. The XRD analysis confirmed the formation of a cubic phase for all samples. The average size of the particles ranged from 3.2 to 5.3 nm. The TEM analysis showed that the particles were highly monodispersed and spherical in shape. Particles with increased Cu2＋ concentrations had a red shift in their PL emission spectra. Enhanced PL emissions were observed for surfactant-capped particles. The experimental results indicate that, as expected, the PL spectrum confirms the presence of Cu2＋ ions in the ZnS nanoparticles.

关键词： NanoparticlesDopingSurfactantQuantum confinementRed shift

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^(1)H NMR tests on damaged and undamaged XLPE and SiR samples

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High Voltage 2019年第3期4卷 203-209页

作者： Lydia Gkoura Taiji Wang Athanasios Anastasiou Noureddine Harid Huw Griffiths Manu Haddad Michalis Fardis Marina Karayianni Institute of nanoscience&nanotechnology National Centre for Scientific Research(NCSR)DemokritosAthensGreece School of Chemical Engineering National Technical University of AthensAthensGreece Department of Electrical and Computer Engineering Advanced Power and Energy Research CentreKhalifa UniversityAbu DhabiUnited Arab Emirates School of Engineering Advanced High Voltage Engineering Research CentreCardiff UniversityCardiffUK

Cross-linked polyethylene(XLPE)and silicone rubber(SiR)samples were subjected to a high-voltage AC stress plane-plane configuration and inclined plane test,*** voltage was applied such that discharge was observed across the surface of the XLPE test sample for several hours and for visible damage to occur on SiR samples also after several *** stressed samples together with virgin samples from the same manufactured batch were tested using nuclear magnetic resonance(NMR)***,^(1)H NMR spin-lattice(T_(1))and spin-spin(T_(2))relaxation time measurements were employed to examine potential changes in the chemical bonding of undamaged and damaged XLPE and SiR *** results show that there may be a moderate increase in the T_(1)and T_(2)values of the damaged samples in comparison with the undamaged *** raises the possibility that NMR can be a useful additional experimental tool in characterising material degradation.

关键词： XLPE rubber relaxation

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Propagation of an electromagnetic soliton in an anisotropic biquadratic ferromagnetic medium

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Chinese Physics B 2013年第3期22卷 275-281页

作者： L.Kavitha M.Saravanan D.Gopi Department of Physics Periyar University The Abdus Salam International centre for Theoretical Physics TriesteItaly Center for nanoscience and nanotechnology Periyar University Department of Chemistry Periyar University

Information storage technology based on anisotropic ferromagnets with sufficiently high magneto-optical effects has received much attention in recent ***-optical recording combines the merits of magnetic and optical *** investigate the magneto-optical effects on a biquadratic ferromagnet and show that the dynamics of the system are governed by a perturbed nonlinear Schro¨dinger *** evolutions of amplitude and velocity of the soliton are found to be time independent,thereby admitting the lossless propagation of the electromagnetic soliton in the medium,which may have potential applications in soliton based optical communication *** also exploit the role of perturbation,which has a significant impact on the propagation of an electromagnetic soliton.

关键词： solitons classical spin models Maxwell equations nonlinear dynamics

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TWO STEPS CHEMICAL-MECHANICAL POLISHING OF RIGID DISK SUBSTRATE TO GET ATOM-SCALE PLANARIZATION SURFACE

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Chinese Journal of Mechanical Engineering 2006年第4期19卷 496-499页

作者： LEI Hong LUO Jianbin LU Xinchun Research centre of nanoscience and nanotechnology Shanghai University Shanghai 200436 China State Key Laboratory of Tribology Tslnghua University Beijing 100084 China

In order to get atomic smooth rigid disk substrate surface, ultra-fined alumina slurry and nanometer silica slurry are prepared, and two steps chemical-mechanical polishing （CMP） of rigid disk substrate in the two slurries are studied. The results show that, during the first step CMP in the alumina slurry, a high material removal rate is reached, and the average roughness （Ra） and the average waviness （Wa） of the polished surfaces can be decreased from previous 1.4 nm and 1.6 nm to about 0.6 nm and 0.7 nm, respectively. By using the nanometer silica slurry and optimized polishing process parameters in the second step CMP, the Ra and the Wa of the polished surfaces can be further reduced to 0.038 nm and 0.06 am, respectively. Atom force microscopy （AFM） analysis shows that the final polished surfaces are ultra-smooth without micro-defects.

关键词： TWo steps Chemical-mechanical polishing(CMP) Rigid disk substrateAtom-scale planarization Slurry

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