检索结果-南通市图书馆

Fabrication and characteristic detection of graphene nanoelectrodes

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2014年第10期57卷 1950-1955页

作者： XIE ShuangXi LIU ZengLei JIAO NianDong tung steve LIU LianQing State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences University of Chinese Academy of Sciences Department of Mechanical Engineering University of Arkansas

Graphene has the advantages of high electrical conductivity,high heat conductivity,and low noise,which makes it a potential option for integrated circuits interconnection and *** this paper,we present a novel fabrication method for graphene nanoeletrodes with ***,graphene grown by chemical vapor deposition(CVD)is assembled to a chip with ***,an atomic force microscopy(AFM)based mechanical cutting method is developed to cut the graphene into nanoribbons and nanoeletrodes with *** the electronic property of a single nanodot is characterized using the garphene nanoelectrodes,demonstrating the effectiveness of the graphene *** fabricated graphene nanoeletrode pairs can be used as probes to detect single molecule in micro-environment,and show an attractive prospect for future molecular electronics applications.

关键词： atomic force microscopy graphene nanoelectrodes nanogap molecular electronics

Research on the atomic force microscopy-based fabrication of nanochannels on silicon oxide surfaces

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2010年第30期55卷 3466-3471页

作者： WANG ZhiQian JIAO NianDong tung steve DONG ZaiLi State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang 110016 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China Mechanical Engineering University of Arkansas Fayetteville Arkansas 72701 USA

The atomic force microscopy (AFM)-based nanomachining of nanochannels on silicon oxide surfaces is investigated both theoretically and experimentally. The relationships of nanochannel depth versus cutting velocity,nanochannel depth versus normal force,friction force versus cutting velocity,and friction force versus normal force are systematically studied. Using the derived theory and fabrication method,a nanochannel with an expected depth can be machined simply by controlling the vertical deflection signal on the position sensitive detector of AFM. The theoretical analysis and fabrication method can be effectively used for AFM-based fabrication of nanochannels.

关键词：原子力显微镜表面氧化硅氧化物基础位置敏感探测器制造纳米通道切割速度

Di-electrophoresis assembly and fabrication of SWCNT field-effect transistor

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2009年第5期54卷 4451-4457页

作者： TIAN XiaoJun WANG YueChao YU HaiBo DONG ZaiLi XI Ning tung steve State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang 110016 China Department of Mechanical Engineering University of Arkansas Fayetteville AR 72701 USA

In the process of fabricating nano electrical device or system based on single-walled carbon nanotube (SWCNT), the controllable assembly and fabrication of SWCNT field-effect transistor (SWCNT FET) is a key issue. SWCNT FET is the most basic and important component in nano electronics. After microelectrode chip of back-gate FET is designed and fabricated, di-electrophoresis technology is adopted to realize the controllable alignment and assembly of SWCNTs, based on dispersing SWCNT by sodium dodecyl sulphate (SDS) facilitated ultra-sonication technique and removing impurities by centrifugal technique. The experiments of SWCNTs assembly demonstrate that SWCNTs are aligned and assembled uniformly at the microelectrodes gap with the alignment density nearly proportional to di-electrophoresis duration and solution concentration. After the processes of rinsing, drying and improving, metallic SWCNTs among the assembled SWCNTs are burned out and residual SDS is removed, and perfect field-effect performance of SWCNT FET is eventually obtained.

关键词：单壁碳纳米管场效应晶体管可控组装电泳技术现场制作十二烷基硫酸钠电子设备电子元件

同方期刊数据库

在线全文

学校读者我要写书评

暂无评论

面向微粒操纵的介电泳芯片系统研究

传感技术学报 2007年第10期20卷 2194-2198页

作者：费飞曲艳丽董再励童兆宏李文荣中国科学院沈阳自动化研究所机器人学实验室

针对目前在纳米器件及传感器的制造中尚无对大量粒子进行有效操纵的方法,我们利用介电泳方法对大量微粒进行定位和传输操纵,介绍了利用MEMS工艺进行介电泳芯片加工的过程以及整个观测与实验系统的建立,通过有限元软件对传统介电泳和行... 详细信息

针对目前在纳米器件及传感器的制造中尚无对大量粒子进行有效操纵的方法,我们利用介电泳方法对大量微粒进行定位和传输操纵,介绍了利用MEMS工艺进行介电泳芯片加工的过程以及整个观测与实验系统的建立,通过有限元软件对传统介电泳和行波介电泳中电极阵列的电场分布进行求解,并在该实验系统下实现了对微通道中的悬浮高度和微粒的运动速度的测量.该实验系统的研究为液体环境下微纳颗粒的装配和分离提供了一条有效的技术路径.

关键词：介电泳微粒操纵微电极阵列有限元方法

用于HRP测定的一种主动式PDMS微混合器

在线全文

学校读者我要写书评

暂无评论

纳米技术与精密工程 2011年第2期9卷 134-139页

作者：詹志坤童兆宏曲艳丽董再励 SRINIV ASAN Balaji 中国科学院机器人学国家重点实验室沈阳110016 中国科学院研究生院北京100084 美国阿肯色州立大学机械工程系费耶特维尔市72701

微米尺度下的生物流体混合是生物微机电系统(BioMEMS)和分析化学等领域研究的重要问题之一,目前的混合方式多以被动式自由扩散为主,存在流体混合效率不高的现象.针对该问题,设计了一种主动式聚二甲基硅氧烷(PDMS)微混合器.该装置利用脉... 详细信息

微米尺度下的生物流体混合是生物微机电系统(BioMEMS)和分析化学等领域研究的重要问题之一,目前的混合方式多以被动式自由扩散为主,存在流体混合效率不高的现象.针对该问题,设计了一种主动式聚二甲基硅氧烷(PDMS)微混合器.该装置利用脉冲气体对多个PDMS微隔膜进行顺序驱动,可实现微混合室中不同液体的快速混合和反应.同时,基于鲁米诺-过氧化氢体系的化学发光反应机理,以辣根过氧化物酶(HRP)作为催化剂,进行了微混合器最佳工作条件研究,基于HRP化学发光分析法和L25-5-6正交实验,确定出微混合器化学发光分析法的最优实验条件组合,并在此实验条件下完成了HRP的微量测定.实验结果表明,目前检测体系下线性范围为2.05×10-9 mol/L～2.05×10-8 mol/L,检测限为2.05×10-9 mol/L,检测反应时间小于2 min,可满足生物医学和分析化学领域对于物质测定方面的微量、快速的检测要求.

关键词：主动式微混合器化学发光辣根过氧化物酶微量测定

在线全文

学校读者我要写书评

暂无评论

内嵌式逻辑型非挥发性内存技术与应用

中国集成电路 2010年第3期19卷 34-42页

作者：郭东政沈士杰徐清祥力旺电子股份有限公司

内嵌式非挥发性内存,具备高良率、高精准度与配合系统做参数调效的特性,能使整体系统具最短开发时程与生产成本。内嵌式非挥发性内存的发展可分为传统型与逻辑型。传统型内嵌式非挥发性内存的制造过程相当复杂,相对于一般逻辑制程来说,... 详细信息

内嵌式非挥发性内存,具备高良率、高精准度与配合系统做参数调效的特性,能使整体系统具最短开发时程与生产成本。内嵌式非挥发性内存的发展可分为传统型与逻辑型。传统型内嵌式非挥发性内存的制造过程相当复杂,相对于一般逻辑制程来说,需额外增加7-9道光罩。逻辑型非挥发性存储器则不同于传统型,其利用一般逻辑制程中之I/O组件来组成非挥发性内存之核心存储单元。基于技术成熟度与生产成本因素,逻辑型非挥发性内存成为在逻辑制程中使用度最高之解决方案。其可应用之范围包含所有使用兼容于一般逻辑制程的数字/模拟芯片。未来逻辑型非挥发性内存解决方案会成为一标准化设计,并被广泛使用于各类消费型电子产品中。

关键词：内嵌式非挥发性内存 NEOBIT NEOFLASH SONOS

Fabrication of all-transparent polymer-based and encapsulated nanofluidic devices using nano-indentation lithography

在线全文

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2017年第1期3卷 373-381页

作者： Cong Wu Tiffany G.Lin Zhikun Zhan Yi Li steve C.H.tung William C.Tang Wen J.Li Department of Mechanical and Biomedical Engineering City University of Hong KongHong Kong 999077China Department of Biomedical Engineering University of CaliforniaIrvineCA 92697-2715USA Department of Automation Yanshan UniversityQinghuangdao 066004China Department of Mechanical Engineering University of ArkansasFayettevilleAR 72701USA

In this paper,we describe a novel and simple process for the fabrication of all-transparent and encapsulated polymeric nanofluidic devices using nano-indentation ***,a nanomechanical probe is used to‘scratch’nanoscale channels on polymethylmethacrylate(PMMA)substrates with sufficiently high ***,polydimethylsiloxane(PDMS)is used twice to duplicate the nanochannels onto PDMS substrates from the‘nano-scratched’PMMA substrates.A number of experiments are conducted to explore the relationships between the nano-indentation parameters and the nanochannel dimensions and to control the aspect ratio of the fabricated *** addition,traditional photolithography combined with soft lithography is employed to fabricate microchannels on another PDMS‘cap’*** manually aligning the substrates,all uncovered channels on two separate PDMS substrates are bonded to achieve a sealed and transparent nanofluidic device,which makes the dimensional transition from microscale to nanoscale *** smallest dimensions of the achievable nanochannels that we have demonstrated thus far are of~20 nm depth and~800 nm width,with lengths extendable beyond 100μ*** flow experiments are performed to verify the reliability of the *** types of colloidal solution are used to visualize the fluid flow through the nanochannels,that is,ethanol is mixed with gold colloid or fluorescent dye(fluorescein isothiocyanate),and the flow rate and filling time of liquid in the nanochannels are estimated based on time-lapsed image *** simplicity of the fabrication process,bio-compatibility of the polymer substrates,and optical transparency of the nanochannels for flow visualization are key characteristics of this approach that will be very useful for nanofluidic and biomolecular research applications in the future.

关键词： indentation lithography nanochannel nanofluidic device nanofluidic flow