检索结果-南通市图书馆

Fabrication of multilayer Nb_2O_5 nanoporous film by anodization of niobium foils

Rare Metals 2015年第2期34卷 77-80页

作者： Guang-Zhong Li Hui-Ping Tang Wen-Yan Zhang Gang Li Lan-Lan Yu Ya-Ning Li State Key Laboratory of Porous Metal Materials Northwest Institute for Nonferrous Metal Research

Multilayer Nb2O5 nanoporous films were successfully synthesized on Nb surfaces by the control anodization process in ethylene glycol containing 4 vol% HF and 2 vol% H2O2 electrolyte. The nanoporous films are characterized in detail by field-emission scanning electron microscopy（FESEM）, transmission electron microscopy（TEM）, and X-ray diffraction（XRD）. The Nb_2O_5 nanoporous films have a multilayer morphology with the side wall thickness of ～5 nm, irregular pores with a diameter of ～25 nm, and a length of up to 7.39 lm, depending on the anodization time. A mechanism for the multilayer Nb2O5 nanoporous formation was also discussed. These nanoporous materials can be very useful in the fields of solar cells, gas sensors, catalysts, optical filters, and capacitors.

关键词： Anodization Multilayer nanoporous film Growth mechanism

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

Nanoparticle-based lift-off technique for ultra-thin nanoporous film preparation

引用

Science in China(Series F) 2008年第6期51卷 819-824页

作者： WANG Wei ZHAO Yu LEI YinHua LI ZhiHong National Key Laboratory of Nano/Micro Fabrication Technology Institute of Microelectronics Peking Uni-versity Beijing 100871 China

Ultra-thin membrane with nanoscale through hole has great potential in biomedical applications, where precise controllability of porosity, pore size and film thickness is urgently required. The present work proposed a cost-effective way to prepare the ultra-thin nanoporous film with a promising controllability. Monodispersed nanoparticle, rather than photoresist, is used as the sacrificial material for this new lift-off process. By releasing the particles, holes can be achieved with predeter-mined characters. A 110 nm-thick nanoporous aluminum film with well-controlled pore＇s diameter was successfully fabricated to validate the technique. The technique has wider process window and better applicability than other nanofabrication methods.

关键词： nanoparticle lift-off nanoporous film

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

Label-free Detection of Biotin Using nanoporous TiO2/DNA Thin-film Coated Wavelength Interrogated Surface Plasmon Resonance Sensors

引用

Chemical Research in Chinese Universities 2014年第1期30卷 157-162页

作者： LI Qiushun HE Hao WANG Junnan ZHENG Hui SHI Jianguo LI Mingyu DONG Wenfei QI Zhimei Key Laboratory of Biosensor of Shandong Province Biology Institute of Shandong Academy of Sciences Jinan 250014 P R. China Suzhou Institute of Biomedical Engineering and Technology Chinese Academy of Sciences Suzhou 215163 P. R. China The Second Hospital of Jilin University Changchun 130041 P. R. China State Key Laboratory of Modern Optical Instrumentation Zhejiang University Hangzhou 310027 P. R. China State Key Laboratory of Transducer Technology Institute of Electronics Chinese Academy of Sciences Beijing 100190 P. R. China

The sensing sensitivity of the wavelength interrogated surface plasmon resonance（WISPR） biosensor could be improved by self-assembly of nanoporous thin-film of TiO2 nanoparticles/DNA（TiO2/DNA）n（n is the number of bilayer） on wavelength interrogated surface plasmon resonance（WISPR） *** growth behavior and surface structure of the nanoporous thin-film were investigated by UV-Vis spectroscopy and scanning electron microscopy,*** home-made WISPR sensor with Krestchmann configuration consisted of a tungsten-halogen lamp as a photon source and a CCD camera as the *** the deposition of （DNA/TiO2）n thin film on WISPR chips,the resonance peak of the reflection spectra appeared in *** the increases of n,the resonance wavelength gradually red shifted,which is consistent with the simulated *** the optimization of the porous film,the WISPR biosensor was utilized to detect low-molecular-weight analytes,such as *** result demonstrates that the sensitivity of [poly（styrene sulfonate）/polyally lamine hydrochlorides]5（PSS/PAH）5 could be 4 times higher than that of polyelectrolyte multilayer modified WISPR sensor.

关键词： nanoporous film Sensing sensitivity Biotin Wavelength interrogated surface plasmon resonance

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

Deposition of nanoporous BiVO;thin-film photocatalyst by reactive magnetron sputtering: Effect of total pressure and substrate

引用

Transactions of Nonferrous Metals Society of China 2022年第3期32卷 957-971页

作者： Siavash BAKHTIARNIA Saeed SHEIBANI Alain BILLARD Eric AUBRY Mohammad ARAB POUR YAZDI School of Metallurgy and Materials Engineering College of EngineeringUniversity of TehranTehranIran Institut FEMTO-ST UMR 6174CNRSUniv.Bourgogne Franche-Comté15BAvenue des Montboucons25030 BesançonFrance

nanoporous BiVO;thin films were deposited using reactive magnetron sputtering in Ar and O;atmosphere, on various substrates, employing pulsed direct-current(DC) power supplies applied to metallic Bi and V targets for rapid deposition. The procedure was followed by a post-annealing treatment in air to crystallize the photoactive monoclinic scheelite structure. The influence of total pressure and substrate on the crystal structure, morphology, microstructure, optical and photocatalytic properties of the films was investigated. The crystallization of monoclinic scheelite structure deposited on fused silica substrate starts at 250 ℃ and the films are stable up to 600 ℃. The morphology of the films is rather dense, despite at the high sputtering pressure(>2 Pa), with embedded nanopores. Among the thin films deposited on fused silica, the one deposited at 4.5 Pa exhibits the highest porosity(52%), with the lowest bandgap(2.44 eV) and it shows the highest photocatalytic activity in the degradation of Rhodamine-B(26% after 7 h) under visible light irradiation. The film deposited on the silicon substrate exhibits the highest photoactivity(53% after 7 h). Lack of hypsochromic shift in the UV-Vis temporal absorption spectra shows the dominance of the chromophore cleavage pathway in the photodecomposition.

关键词： photocatalysis BiVO4 thin film sputtering nanoporous film

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

Largely reduced cross-plane thermal conductivity of nanoporous In0.1Ga0.9N thin films directly grown by metal organic chemical vapor deposition

引用

Frontiers in Energy 2018年第1期12卷 127-136页

作者： Dongchao XU Quan WANG Xuewang WU Jie ZHU Hongbo ZHAO Bo XIAO Xiaojia WANG Xiaoliang WANG Qing HAO Aerospace & Mechanical Engineering University of Arizona 1130 NMountain Ave Tucson AZ 85721 USA Key laboratory of Semiconductor Materials Science Institute ofSemiconductors Chinese Academy of Sciences Beijing 100083 China Department of Mechanical Engineering University of Minnesota IllChurch St. SE Minneapolis MN 55455 USA

In recent year, nanoporous Si thin films have been widely studied for their potential applications in thermoelectrics, in which high thermoelectric performance can be obtained by combining both the dramatically reduced lattice thermal conductivity and bulk-like elec- trical properties. Along this line, a high thermoelectric figure of merit （ZT） is also anticipated for other nanoporous thin films, whose bulk counterparts possess superior electrical properties but also high lattice thermal conductivities. Numerous thermoelectric studies have been carried out on Si-based nanoporous thin fills, whereas cost-effective nitrides and oxides are not systematically studied for similar thermoelectric benefits. In this work, the cross-plane thermal conductivities of nanoporous ***.9N thin films with varied porous patterns were measured with the time-domain thermoreflectance techni- que. These alloys are suggested to have better electrical properties than conventional SixGel x alloys; however, a high ZT is hindered by their intrinsically high lattice thermal conductivity, which can be addressed by introdu- cing nanopores to scatter phonons. In contrast to previous studies using dry-etched nanopores with amorphous poreedges, the measured nanoporous thin films of this work are directly grown on a patterned sapphire substrate to minimize the structural damage by dry etching. This removes the uncertainty in the phonon transport analysis due to amorphous pore edges. Based on the measurement results, remarkable phonon size effects can be found for a thin film with periodic 300-nm-diameter pores of different patterns. This indicates that a significant amount of heat inside these alloys is still carried by phonons with -300 nm or longer mean flee paths. Our studies provide important guidance for ZT enhancement in alloys of nitrides and similar oxides.

关键词： nanoporous film thermoelectrics phonon,mean free path diffusive scattering

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

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

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

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：