检索结果-南通市图书馆

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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nano-confined ammonia borane for chemical hydrogen storage

引用

Frontiers of Chemical Science and Engineering 2012年第1期6卷 27-33页

作者： M. A.WAHAB Huijun ZHAO X. D. YAO ARC centre of Excellence for Functional Nanomaterials Australian Institute for Engineering and Nanotechnology the University of Queensland St Lucia 4072 Australia centre for Clean Energy and Environment Griffith University Gold Coast 4222 Australia Queensland micro-and nanotechnology centre Griffith University Nathan 4111 Australia

There is a great demand for a sufficient and sustainable energy supply. Hence, the search for applicable hydrogen storage materials is extremely important owing to the diversified merits of hydrogen energy. In this regard, ammonia borane （NH3BH3, AB） containing 19.6wt-% hydrogen has been considered as a promising material for hydrogen storage applications to realize the ＂hydrogen economy＂, but with limits from slow kinetics of hydrogen release and by-product of trace gases such as ammonia and borazine. In this review, we introduce the recent research on AB, regarding to the nanoconfinement effect on improving the kinetics at a relatively low temperature and the prevention/reduction of undesirable gas formation.

关键词： ammonia borane hydrogen storage

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Near-infrared light-driven Janus capsule motors： Fabrication, propulsion, and simulation

引用

Nano Research 2016年第12期9卷 3747-3756页

作者： Yingjie Wu Tieyan Si Jingxin Shao Zhiguang Wu Qiang He Key Laboratory of microsystems and microstructures Manufacturing Ministry of Education Micro/Nanotechnology Research CentreHarbin Institute of Technology Yi Kuang Jie 2 Harbin 150080 China

We report a fuel-free, near-infrared （NIR）-driven Janus microcapsule motor. The Janus microcapsule motors were fabricated by template-assisted polyelectrolyte layer-by-layer assembly, followed by spraying of a gold layer on one side. The NIR-powered Janus motors achieved high propulsion with a maximum speed of 42μm.s-1 in water. The propulsion mechanism of the Janus motor was attributed to the self-thermophoresis effect： The asymmetric distribution of the gold layer generated a local thermal gradient, which in turn generated thermophoretic force to propel the Janus motor. Such NIR-propelled Janus capsule motors can move efficiently in cell culture medium and have no obvious effects on the cell at the power of the NIR laser, indicating considerable promise for future biomedical applications.

关键词： layer-by-layer assembly Janus micromotor light-driven active targeting photothermal effect

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Single crystal-single crystal bonding of langasite exhibited high strength of 23.28 MPa

引用

Journal of Materials Science & Technology 2023年第29期160卷 139-147页

作者： Guangyao Pei Binghe Ma Tao Ye Zhonggang Zhang Keli Zhao Jinjun Deng Seeram Ramakrishna Jian Luo Ministry of Education Key Laboratory of micro/Nano Systems for Aerospace Northwestern Polytechnical UniversityXi’an 710072China centre for Nanofibers and nanotechnology National University of Singapore117576Singapore

Langasite(LGS,La_(3)Ga_(5)SiO_(14))is a promising material in high-temperature piezoelectric devices due to its excellent thermal stability,piezoelectricity,and electrical property.A major challenge in the development of LGS-based devices is to form high-strength bonding of the brittle ***,we report that the single crystal-single crystal(dual-SC)bonding of LGS is realized through thermal activation under a low com-pression of 50 kPa for the first time.A record bonding strength of 23.28 MPa is achieved within the dual-SC bonded LGS/LGS structure(with a high bonding ratio exceeding 93%),which is 5 times higher than that of the recent reported LGS/LGS bonding structure(in which a relatively fragile amorphous interface layer is formed between the two LGS samples).The smooth and void-free dual-SC bonding interface of LGS is verified via the cross-sectional transmission electron microscopy(TEM)observations.

关键词： Thermal activation Single crystal-single crystal bonding Langasite High-strength Low compression

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Flexible supercapacitor electrodes with vertically aligned carbon nanotubes grown on aluminum foils

引用

Progress in Natural Science:Materials International 2016年第3期26卷 232-236页

作者： Itir Bakis Dogru Mete Batuhan Durukan Onur Turel Husnu Emrah Unalan micro and nanotechnology Department METU Department of Metallurgical and Materials Engineering METU

In this work, vertically aligned carbon nanotubes（VACNTs） grown on aluminum foils were used as flexible supercapacitor electrodes. Aluminum foils were used as readily available, cheap and conductive substrates, and VACNTs were grown directly on these foils through chemical vapor deposition（CVD）method. Solution based ultrasonic spray pyrolysis（USP） method was used for the deposition of the CNT catalyst. Direct growth of VACNTs on aluminum foils ruled out both the internal resistance of the supercapacitor electrodes and the charge transfer resistance between the electrode and electrolyte. A specific capacitance of 2.61 m F/cm;at a scan rate of 800 m V/s was obtained from the fabricated electrodes, which is further improved through the bending cycles.

关键词： Supercapacitor electrodes Carbon nanotubes Flexibility

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Size effect of semiconductor quantum wells in excitonic spin generation under drift

引用

Optoelectronics Letters 2020年第4期16卷 318-320页

作者： M.Idrish Miah Department of Physics University of ChittagongChittagong 4331Bangladesh Queensland micro-and nanotechnology centre Griffith UniversityBrisbane 4111Australia

The excitonic spin polarization in dependence of the size of semiconductor quantum well(QW)was investigated by observing the two different circular polarizations of photoluminescence(PL).From the measurements of PL in QWs,it was found that there is a difference between the two different polarization conditions,which is caused by spindependent phase-space *** PL spin polarization was estimated from the signals of the left and right circularly polarized PL and was found to depend on the size of the wells as well as on the strength of the bias *** effects of the size of the well and applied electric field on the excitonic PL spin polarization were studied.

关键词： field. quantum circular

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

High-aspect-ratio nanoimprint process chains

引用

microsystems & Nanoengineering 2017年第1期3卷 221-232页

作者： Víctor J.Cadarso Nachiappan Chidambaram Loïc Jacot-Descombes Helmut Schift Laboratory for micro-and nanotechnology Research Division Synchrotron Radiation and NanotechnologyPaul Scherrer InstitutVilligen 5232Switzerland micro Resist Technology GmbH Köpenicker Straße 325Berlin 12555Germany

Different methods capable of developing complex structures and building elements with high-aspect-ratio nanostructures combined with microstructures,which are of interest in nanophotonics,are *** originals for subsequent replication steps,two families of masters were developed:(i)3.2μm deep,180 nm wide trenches were fabricated by silicon cryo-etching and(ii)9.8μm high,350 nm wide ridges were fabricated using 2-photon polymerization direct laser *** emerging technologies enable the vertical smooth sidewalls needed for a successful imprint into thin layers of polymers with aspect ratios exceeding *** with high aspect ratios of up to 28 and no residual layer were produced in Ormocers using the micromoulding into capillaries(MIMIC)process with subsequent *** work presents and balances the different fabrication routes and the subsequent generation of working tools from masters with inverted tones and the combination of hard and soft *** provides these techniques with a proof of concept for their compatibility with high volume manufacturing of complex micro-and nanostructures.

关键词： cryo-etching direct 6 write laser lithography high aspect ratio moulding nanoimprint lithography Ormocer photonic nanofences 2-photon polymerization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Leukocyte Membrane-Coated Liquid Metal Nanoswimmers for Actively Targeted Delivery and Synergistic Chemophotothermal Therapy

引用

Research 2020年第1期2020卷 571-580页

作者： Daolin Wang Changyong Gao Chang Zhou Zhihua Lin Qiang He Key Laboratory of microsystems and microstructures Manufacturing Ministry of EducationMicro/Nanotechnology Research CentreHarbin Institute of Technology92 West Dazhi StreetHarbin 150080China

We report a leukocyte membrane-coated gallium nanoswimmer(LMGNS)capable of ultrasound-propelled motion,antibiofouling,and cancer cell recognition and *** LMGNS consists of a needle-shaped gallium core encapsulating an anticancer drug and a natural leukocyte membrane *** the propulsion of an ultrasound field,LMGNSs could autonomously move in biological media with a speed up to 108.7μms^(-1).The velocity and motion direction of the LMGNSs can be modulated by regulating the frequency and voltage of the applied ultrasound *** to the leukocyte membrane coating,LMGNSs can not only avoid biofouling during the motion in blood but also possess cancer cell recognition *** LMGNSs could actively seek,penetrate,and internalize into the cancer cells and achieve enhanced anticancer efficiency by combined photothermal and chemical *** biofunctionalized liquid metal nanoswimmer presents a new type of multifunctional platform for biomedical applications.

关键词： needle fouling autonomous

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in haemostatic sponges: Characteristics and the underlying mechanisms for rapid haemostasis

引用

Bioactive Materials 2023年第9期27卷 231-256页

作者： Akriti Nepal Huong D.N.Tran Nam-Trung Nguyen Hang Thu Ta Queensland micro-and nanotechnology centre Griffith UniversityNathanQueensland4111Australia Australian Institute for Bioengineering and nanotechnology University of QueenslandSt LuciaQueensland4072Australia Bioscience Discipline School of Environment and ScienceGriffith UniversityNathanQueensland4111Australia

In traumatized patients, the primary cause of mortality is uncontrollable continuous bleeding and unexpected intraoperative bleeding which is likely to increase the risk of complications and surgical failure. High expansion sponges are effective clinical practice for the treatment of wound bleeding (irregular/deep/narrow) that are caused by capillaries, veins and even arterioles as they possess a high liquid absorption ratio so can absorb blood platelets easily in comparison with traditional haemostasis treatments, which involve compression, ligation, or electrical coagulation etc. When in contact with blood, haemostatic sponges can cause platelet adhesion, aggregation, and thrombosis, preventing blood from flowing out from wounds, triggering the release of coagulation factors, causing the blood to form a stable polymerized fibre protein, forming blood clots, and achieving the goal of wound bleeding control. Haemostatic sponges are found in a variety of shapes and sizes. The aim of this review is to facilitate an overview of recent research around haemostatic sponge materials, products, and technology. This paper reviews the synthesis, properties, and characteristics of haemostatic sponges, together with the haemostasis mechanisms of haemostatic sponges (composite materials), such as chitosan, cellulose, gelatin, starch, graphene oxide, hyaluronic acid, alginate, polyethylene glycol, silk fibroin, synthetic polymers silver nanoparticles, zinc oxide nanoparticles, mesoporous silica nanoparticles, and silica nanoparticles. Also, this paper reviews commercial sponges and their properties. In addition to this, we discuss various in-vitro/in-vivo approaches for the evaluation of the effect of sponges on haemostasis .

关键词： Haemostatic sponge Characteristics Mechanism Haemostasis Nanoparticles

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fast patterning and dry-etch of SiN_x for high resolution nanoimprint templates

引用

Journal of Semiconductors 2009年第6期30卷 138-141页

作者：疏珍万景陆冰睿谢申奇陈宜方屈新萍刘冉 State Key Laboratory of ASIC and System Department of Microelectronics Fudan University micro and nanotechnology centre Rutherford Appleton Laboratory Chilton Didcot Oxon OX11 0QX UK

We developed a simplified nanofabrication process for imprint templates by fast speed electron beam lithography（EBL） and a dry etch technique on a SiNx substrate,intended for large area *** this end,the highly sensitive chemically amplified resist（CAR）,NEB-22,with negative tone was *** EBL process first defines the template pattern in NEB-22,which is then directly used as an etching mask in the subsequent reactive ion etching（RIE） on the SiNx to form the desired *** properties of both e-beam lithography and dry etch of NEB-22 were carefully studied,indicating significant advantages of this process with some drawbacks compared to when Cr was used as an etching ***,our results open up a good opportunity to fabricate high resolution imprint templates with the prospect of wafer scale manufacturing.

关键词： SiNx templates nanoimprint NEB-22 electron bean lithography reactive ion etch

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：