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Nano Research 2023年第7期16卷 10222-10233页

作者： Vadim I.Avilov Roman V.Tominov Zakhar E.Vakulov Lev G.Zhavoronkov Vladimir A.Smirnov Research lab.ratory Neuroelectronics and Memristive nanomaterials(NEUROMENA lab. Southern Federal UniversityTaganrog 347922Russia Institute of Nanotechnologies Electronics and Electronic Equipment EngineeringSouthern Federal UniversityTaganrog 347922Russia

The paper shows the results of the mathematical model development and the numerical simulation of the oxygen vacancies,and the distribution of TiO,Ti_(2)O_(3),and TiO_(2)oxides in the titanium oxide nanostructure obtained by local anodic oxidation(anodization).The effect of the anodization voltage pulse duration and amplitude on the titanium oxide composition distribution and the conduction channel formation was *** device prototypes based on electrochemical titanium oxide are fabricated and *** was shown that forming free resistive switching between the low resistances state(LRS)1.43±0.54 kΩand the high resistance state(HRS)28.75±9.75 kΩwere observed during 100,000 switching cycles and LRS 1.49±0.23 kΩwas maintained for 10,000 *** resistive switching of the synaptic device prototype was *** was shown that increasing Uset from 0.5 to 1.5 V leads to different LRS from 3.96±0.19 to 0.71±0.10 kΩ.The results obtained can be used in the development of technological foundations for the formation of high-performance multilevel artificial synapses for elements of neuroelectronics and hardware neural networks.

关键词： artificial intelligence neuromorphic systems memristive cross bar resistive switching scanning probe microscopy titanium oxide

Drosophila melanogaster as an indispensable model to decipher the mode of action of neurotoxic compounds

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BIOCELL 2023年第1期47卷 51-69页

作者： MONALISA MISHRA PUNYATOYA PANDA BEDANTA KUMAR BARIK AMRITA MONDAL MRUTUNJAYA PANDA Neural Developmental Biology lab Department of Life ScienceNIT RourkelaRourkela769008India Centre for nanomaterials NIT RourkelaRourkela769008India

Exposure to some toxic compounds causes structural and behavioral anomalies associated with the neurons in the later stage of *** toxic compounds are termed as a neurotoxicant,which can be a physical factor,a toxin,an infection,radiation,or maybe a *** incongruities caused due to a neurotoxicant further depend on the toxicity of the *** importantly,the neurotoxicity of the compound is associated with the concentration and the time point of *** neurodevelopmental defect appears depending on the toxicity of the compound.A neurodevelopmental defect may be associated with a delay in developmental time,defective growth,structural abnormality of many organs,including sensory organs,behavioral abnormalities,or death in the fetus *** model organisms are employed to assess the effect of *** current review summarizes several methods used to check the effect of neurotoxicant and their effect using the model organism Drosophila melanogaster.

关键词： Developmental cycle Drug metabolism Neurotoxicity Neurotoxicants Complex behavioral assay Stress enzymes

Function-regeneration of non-porous hydrolyzed-MOF-derived materials

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Nano Research 2019年第8期12卷 1921-1930页

作者： Yo Chan Jeong Jin Weon Seo Jae Ho Kim Seunghoon Nam Min Chang Shin Young Shik Cho Jin Syul Byeon Chong Rae Park Seung Jae Yang Carbon nanomaterials Design lab.ratory Research Institute of Advanced Materials and Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea Advanced Nanohybrids lab. Department of Chemical Engineering Inha UniversityIncheon 22212Republic of Korea School of Advanced Materials Engineering College of Engineering Andong National University Andong Gyeongsangbuk-do 36729Republic of Korea

A facile synthetic strategy based on a water-based process is developed for the preparation of metal-organic framework (MOF)-derived materials by revisiting the hydrolyzed non-porous metal-organic frameworks (h-MOF). The poor water stability of MOF has been recognized as key limitations for its commercialization and large-scale applications because the hydrolysis resulted in the complete loss of their functionalities. However, we found that the negative effect of hydrolysis on MOF can be nullified during the heat treatment. As similar to the intact MOF, h-MOF can be used as a precursor for the preparation of MOF-derived materials from porous MOF-derived carbons (MDCs) to MDC@ZnO composites. The property of h-MOF-derived materials is almost equivalent to that of MOF-derived materials. In addition, h-MOF turned the weakness of water instability to the strength of facile water-based process for hybridization. With the demonstration of the hybrid composite between h-MDC@ZnO and reduced graphene oxide (rGO) as a prototype example, it exhibited superior electrochemical performance when evaluated as an electrode material for lithium-ion batteries.

关键词： nanomaterials metal-organic framework (MOF) porous materials MOF-derived carbon hydrolyzed MOF

Structural and Optical Properties of Graphene Oxide Prepared by Modified Hummers’Method

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Computers, Materials & Continua 2016年第6期52卷 175-185页

作者： N.Selvakumar Uday Pradhan S.B.Krupanidhi Harish C.Barshilia nanomaterials Research lab Surface Engineering DivisionCSIR-National Aerospace LaboratoriesBangalore-560017India Materials Research Center Indian Institute of ScienceBangalore-560012India

Graphene oxide was synthesized from graphite flakes using modified Hummers’*** interlayer spacings of graphite,graphite oxide and graphene oxide were measured using X-ray diffraction *** C/O atomic ratios of graphite oxide and graphene oxide were calculated from XPS *** transformation of graphite to graphite oxide and finally to graphene oxide was clearly observed from the micro-Raman spectroscopy data and was confirmed from the FESEM ***-VIS-NIR spectrophotometer was used to study the absorbance of graphene oxide and reduced graphene oxide ***,the chemically reduced graphene oxide was heat-treated in air to obtain chemically modified graphene.

关键词： Graphene oxide Graphite,modified Hummers’method thermal annealing optical properties

Fast Zn^(2+)mobility enabled by sucrose modified Zn^(2+)solvation structure for dendrite-free aqueous zinc battery

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Nano Research 2023年第3期16卷 3839-3846页

作者： Yufang Cao Xiaohui Tang Linge Li Haifeng Tu Yuzhen Hu Yingying Yu Shuang Cheng Hongzhen Lin Liwen Zhang Jiangtao Di Yongyi Zhang Meinan Liu School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China Key lab.ratory of Multifunctional nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China Division of nanomaterials and Jiangxi Key lab.of Carbonene Materials Jiangxi Institute of NanotechnologyNanchang 330200China

Aqueous zinc battery has been regarded as one of the most promising energy storage systems due to its low cost and environmental ***,the safety concern on Zn anodes caused by uncontrolled Zn dendrite growth in aqueous electrolyte hinders their ***,sucrose with multi-hydroxyl groups has been introduced into aqueous electrolyte to modify Zn^(2+)solvation environment and create a protection layer on Zn anode,thus effectively retarding the growth of zinc *** simulations and experiments confirm that sucrose molecules can enter into the solvation sheath of Zn^(2+),and the as-formed unique solvation structure enhances the mobility of Zn^(2+).Such fast Zn^(2+)kinetics in sucrose-modified electrolyte can successfully suppress the dendrite *** this sucrose-modified aqueous electrolyte,Zn/Zn symmetric cells present more stable cycle performance than those using pure aqueous electrolyte;Zn/C cells also deliver an impressive higher energy density of 129.7 Wh·kg^(−1)and improved stability,suggesting a great potential application of sucrose-modified electrolytes for future Zn batteries.

关键词： solvation structure Zn^(2+)mobility dendrite suppression sucrose

Battery Separators Functionalized with Edge-Rich MoS2/C Hollow Microspheres for the Uniform Deposition of Li2S in High-Performance Lithium-Sulfur Batteries

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Nano-Micro Letters 2019年第3期11卷 104-118页

作者： Nan Zheng Guangyu Jiang Xiao Chen Jiayi Mao Nan Jiang Yongsheng Li lab.of Low-Dimensional Materials Chemistry Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and Engineering East China University of Science and Technology

As promising energy storage systems,lithium-sulfur(Li-S)batteries have attracted significant attention because of their ultra-high energy ***,Li-S battery suffers problems related to the complex phase conversion that occurs during the charge-discharge process,particularly the deposition of solid Li2S from the liquid-phase polysulfides,which greatly limits its practical *** this paper,edge-rich MoS2/C hollow microspheres(Edg-MoS2/C HMs)were designed and used to functionalize separator for Li-S battery,resulting in the uniform deposition of *** microspheres were fabricated through the facile hydrothermal treatment of MoO3-aniline nanowires and a subsequent carbonization *** obtained Edg-MoS2/C HMs have a strong chemical absorption capability and high density of Li2S binding sites,and exhibit excellent electrocatalytic performance and can effectively hinder the polysulfide shuttle effect and guide the uniform nucleation and growth of ***,we demonstrate that the Edg-MoS2/C HMs can effectively regulate the deposition of Li2S and significantly improve the reversibility of the phase conversion of the active sulfur species,especially at high sulfur loadings and high *** a result,a cell containing a separator functionalized with Edg-MoS2/C HMs exhibited an initial discharge capacity of 935 mAh g-1 at 1.0 C and maintained a capacity of 494 mAh g-1 after 1000 cycles with a sulfur loading of 1.7 mg ***,at a high sulfur loading of 6.1 mg cm-2 and high rate of 0.5 C,the cell still delivered a high reversible discharge capacity of 478 mAh g-1 after 300 *** work provides fresh insights into energy storage systems related to complex phase conversions.

关键词： Edge-rich MoS2/C Hollow microspheres Li2S Lithium-sulfur batteries

Recent trends,challenges,and perspectives in piezoelectric-driven self-chargeable electrochemical supercapacitors

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Carbon Energy 2022年第5期4卷 833-855页

作者： Karthikeyan Krishnamoorthy Parthiban Pazhamalai Sindhuja Manoharan Noor Ul Haq Liyakath Ali Sang-Jae Kim nanomaterials&System lab Major of Mechatronics EngineeringFaculty of Applied Energy SystemJeju National UniversityJejuSouth Korea Research Institute of Energy New Industry Jeju National UniversityJejuSouth Korea nanomaterials&System lab Major of Mechanical System EngineeringCollege of EngineeringJeju National UniversityJejuSouth Korea

The increasing demand for wearable electronic devices has resulted in tremendous progress in research on energy harvesting and storage devices/*** storage devices require a power source to charge them,whereas energy harvesting devices require a storage compartment to store the harvested energy for sustainable ***,a piezoelectrically driven self-charging supercapacitor power cell(SCSPC)was developed to harvest and store electrical energy in a solitary system to determine the potential impact of these two types of energy devices for wearable electronic *** review describes the recent advances in piezoelectric-driven SCSPCs in terms of device configuration,piezoelectric separator,electrolyte types,electrode materials,current collectors,and system *** review focuses specifically on the principles and mechanism of the self-charging process that occurred in the SCSPCs and the use of a promising piezo electrochemical spectroscopic tool to realize the piezo electrochemical energy transfer and storage process in the ***,the current challenges and new perspectives for future developments in the emerging area of SCSPCs or integrated energy devices are discussed.

关键词： electrospinning integrated energy cell mechanical energy piezoelectric separators piezoelectrochemical spectroscopy self-charging supercapacitor power cell

Microscale methods to assemble mammalian cells into tissue-like structures

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Science China(Life Sciences) 2012年第10期55卷 862-871页

作者： GONG PeiYuan ZHENG WenFu XIAO Dan JIANG XingYu College of Chemistry Sichuan UniversityChengdu 610064China Key lab.for Biological Effects of nanomaterials and Nanosafety National Center for Nanoscience and TechnologyBeijing 100190China

Different cell types make up tissues and organs hierarchically and communicate within a complex, three-dimensional (3D) en- vironment. The in vitro recapitulation of tissue-like structures is meaningful, not only for fundamental cell biology research, but also for tissue engineering (TE). Currently, TE research adopts either the top-down or bottom-up approach. The top-down approach involves defining the macroscopic tissue features using biomaterial scaffolds and seeding cells into these scaffolds. Conversely, the bottom-up approach aims at crafting small tissue building blocks with precision-engineered structural and functional microscale features, using physical and/or chemical approaches. The bottom-up strategy takes advantage of the repeating structural and functional units that facilitate cell-cell interactions and cultures multiple cells together as a functional unit of tissue. In this review, we focus on currently availab.e microscale methods that can control mammalian cells to assemble into 3D tissue-like structures.

关键词： microscale cell assembly tissue-like structures tissue engineering

Microstructure and Toughness of Seeded Hot-Pressed Si_3N_4 Ceramics

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Journal of Materials Science & Technology 2004年第3期20卷 241-244页

作者： D.Bucevac S.Boskovic M.Vlajic V.Krstic Institute of Nuclear Sciences vinca Materials Sci.Lab.POB 52211001 BelgradeSerbia and MontenegroInstitute of Nuclear Sciences vincaMaterials Sci.Lab.POB 52211001 BelgradeSerbia and MontenegroCentre for Manufacturing of Advanced Ceramics and NanomaterialsQueens UniversityNicol HallKingstonOntarioCanadaCentre for Manufacturing of Advanced Ceramics and NanomaterialsQueens UniversityNicol HallKingstonOntarioCanada

Densification, phase transformation and fracture toughness were studied in hot-pressed Si_3N_4 seeded by in-houseproduced large, elongated β-Si_3N_4 seeds. A mixture of Y_2O_3-Al_2O_3 was used as the sintering aid. Concentration ofseeds were varied from 0 to 6 wt pct and the sintering time at 1700℃ was varied from 1 to 4 h. Maximum fracturetoughness of 9.0 MPam^(1/2) was measured in samples containing 5 wt pct seeds, hot pressed at 1700℃ for 4 h.

关键词： In-situ composites Seeds Hot-pressing Silicon nitride

S vacant CuIn_(5)S_(8) confined in a few-layer MoSe_(2) with interlayerexpanded hollow heterostructures boost photocatalytic CO_(2) reduction

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Rare Metals 2022年第1期41卷 144-154页

作者： Li-Juan Chen Ting-Ting Liu Shu-Ming Liu Sheng Cai Xiao-Xiao Zou Jing-Wen Jiang Zhi-Yuan Mei Gen-Fu Zhao Xiao-Fei Yang Hong Guo School of Materials and Energy Yunnan UniversityKunming 650091China nanomaterials and Energy lab Department of Mechanical and Materials EngineeringWestern UniversityLondonON N6A 5B9Canada

The conversion of CO_(2)into CO,CH_(4)and other hydrocarbons through solar energy can alleviate the energy shortage *** design a novel photocatalyst with S defects CuIn_(5)S_(8)@MoSe_(2)hollow *** interlayerexpanded MoSe_(2)can increase the adsorption of *** unique hollow structure can improve the light utilization efficiency and the electron–holes ***_(5)S_(8)with S vacancies in bimetallic sites has high selectivity and photocatalytic reduction of CO_(2)***,S vacant CuIn_(5)S_(8)confined in a few-layers MoSe_(2)with interlayer-expanded hollow heterostructures exhibit super performance for photocatalytic CO_(2)*** 8-h light reaction,the outputs of CO and CH_(4)for the 15.3 wt%CuIn_(5)S_(8)@MoSe_(2)sample containing S vacancies(Vs)are 30.4 and 14.7 lmol·g^(-1),*** mechanism is also investigated in detail through in situ Fourier transform infrared spectroscopy technology.

关键词： Sulfur vacancy CuIn_(5)S_(8) MoSe_(2)heterojunction Photocatalytic CO_(2)reduction