微通道板非晶态Al2O3电子透射膜

文中介绍了ＭＣＰ非晶态Ａｌ２Ｏ３电子透射膜在成像器件中的作用，阐述了膜层的选择，形成条件与方法，给出了膜层形成及其与辉光气体放电的关系，测量了膜层及带膜ＭＣＰ的些特性，并进行了初步分析了讨论。     

PECVDSi_3N_4钝化膜对GaAsMESFET直流特性的影响

用ＰＥＣＶＤ氮化硅薄膜对ＧａＡｓ ＭＥＳＦＥＴ进行钝化，本文讨论了钝化对器件特性的影响，提出了一种改善ＧａＡｓ器件表面的方法，结果表明利用该方法和ＰＥＣＶＤ氮化硅钝化膜改善了器件的栅漏击穿电压。     

数字电视技术英文专业词汇释义

ＡＤＲ地址键 　ＡＩＵ辅助设备接口单元 　ＡＭＥＰ高级运动估测处理器 　ＡＭＬＣＤ有源矩阵液晶显示器 　ＡＰ有效图像 　ＡＰＦＣ有源功率因数校正电路 　ＡＳＬ自动排序逻辑 　ＡＵＳＰ高级视频信号处理器 　Ｂｉｄｉｒｅｃｔｉｏｎａｌｌｙｐｒｅｄｉｃｔｅｄｐｉｃｔｕｒｅ双向预测编码图帧 　ＢＢＤ基带延迟线 　ＢＥＦ带宽抑制滤波器 　ＢＥＰ比特误码概率 　ＢＦＰ消色标志脉冲 　ＢＭＡ块匹配法 　ＢＭＣ双相标识编码 　ＢＭＰ块匹配处理器 　ＢＶＤＦ基本向量方向滤波器 　ＣＢＲ固定数码率 　ＣＣＤ氧化物介质电容器 　ＣＣ…     

爱普生新款投影机

日前,ＥＰＳＯＮ在国内发布了两款多媒体液晶投影机新品：便携式投影机ＥＭＰ－７２００和手提式投影机ＥＭＰ—７５００。ＥＰＳＯＮＥＭＰ－７２００提供真正ＸＧＡ级,亮度达１０００ＡＮＳＩ流明,分辨率为１０２４×７６８,能够在ＣＡＤ／ＣＡＭ和计算机图形图像应用中呈现高质量画面;支持各种通用影像规格：ＮＴＳＣ４．４３、Ｍ—ＰＡＬ、Ｎ－ＰＡＬ及ＮＴＳＣ３．５８、ＰＡＬ和ＳＥＣＡＭ。ＥＭＰ－７５００与笔记本电脑和便携屏幕一起组成流动会议系统,提供真正ＸＧＡ分辨率１０２４×７６８的输出,高效ＵＨＥ灯泡能够提供更…     

惠普和掌中万维展示其产品设备及技术解决方案

惠普 ＷＡＰ应用解决包括 ＷＡＰ ＩＮＦＯ服务、ＷＡＰ Ｅ—ｍａｉｌ服务、ＷＡＰ搜索引擎和 ＷＡＰ金融服务。其中ＷＡＰｓｅｒｖ水虎鱼系列解决方案是以实现移动电子化服务为目标的产品,是一系列结合了完整硬件、软件、应用、第三方产品和培训、服务、技术支持的完整的ＷＡＰ 解决方案包。掌中万维目前已形成了支持电信级和企业级的全套无线互联产品：ＭＩＰＴＭ、ＭＡＰＴＭ、ＭＣＳＴＭ、ＭＩＧＴＭ、Ｐ这些产品ＷＡＰ和ＳＭＳ,并均适用于各种网络,如 ＧＳＭ、ＣＤＭＡ、ＧＰＲＳ、３Ｇ、ＦＬＥＸ、ＰＯＣＳＡＧ、ＣＣＰＤ等。同时…     

上海贝尔承建天津联通移动智能网

日前 ,上海贝尔与中国联通天津分公司就天津本地移动智能网建设正式签订合同 ,这是继中国联通天津分公司ＧＳＭ五期工程建设项目后 ,上海贝尔与中国联通在天津的又一项重大合作。在本期工程中 ,上海贝尔将在天津市区为中国联通新建一套移动智能网系统 ,包括一个ＳＣＰ和一个ＳＭＰ ,并将移动网络中的ＧＭＳＣ点升级为ＳＳＰ ,支持标准ＣＡＭＥＬＰＨＡＳＥ 2协议 ,对现有网络的端局设备无需做任何改动 ,即可平滑升级到标准纯ＣＡＭＥＬＰＨＡＳＥ 2系统。此次合作 ,上海贝尔在充分利用现有网络条件的基础上 ,创造性地推出了固定网与移动网合…     

数字音频编码技术的回顾与发展

介绍了早期的ＯＣＦ,ＰＸＦＥ,ＣＮＥＴ和ＭＵＳＩＣＡＭ等编码器,分析了ＭＰＥＧ－４中的两个音频编码器ＴｗｉｎＶＱ和ＭＰＥＧ－２ＡＡＣ,对小波在音频编码上的引用也作了阐述。     

纤云弄巧索尼T415

索尼公司推出堪称世界最轻薄的ＰＤＡ产品Ｃｌｉｅ ＰＥＧ－Ｔ４１５；只有１１．３毫米的厚度，相当于半个烟盒。重量仅有１２２克 这可是ＦＤＡ的轻量级产品。 Ｔ４１５采用目前ＰＡＬＭ公司的操作系统的最高版本ＰＡＬＭ ＯＳ ｖ４．１，频率为３３ＭＨＺ的摩托罗拉ＤｒａｇｏｎｂａｌｌＶＺ　３３ＭＨＺ处理芯片，内置８Ｍ８ ＲＡＭ和４ＭＢ　ｆｌａｓｈ　ＲＯＭ 单从配置上看；这款产品与索尼此前推出的Ｃｌｉｅ　７００并无多大不同，面向中档消费者。 这款新产品综合了手持电脑以及通用遥控器的功能。消费者使用ＦＥＧ－Ｔ４１５可以…     

ISO／IEC MPEG—2先进音频编码（一）

在对兼容性没有任何要求的条件下，ＩＳＯ／ＩＥＣＭＰＥＧ－２先进音频编码（ＡＡＣ）系统使ＩＳＯ／ＩＥＣＭＰＧＥ－２编码具有最好的音频质量，叙述了ＡＡＣ系统（ＩＳＯ／ＩＥＣ１３８１８－７）的主要特点，ＭＰＥＧ－２ＡＡＣ把高分辨率滤波器组，预测技术，霍夫曼编码的编码效率和其他功能结合在一起，可以在数据率可变的情况下，传输品质极高的音频。     

单端PECL与差分PECL的互连

正射极耦合逻辑（ＰＥＣＬ）是成帧器高速Ｉ／Ｏ的标准逻辑电平,这种输出方式耗电较大,为降低功耗需采用一些间接的解决方案。Ｍａｘｉｍ推出的ＭＡＸ３８８１、ＭＡＸ３８９１复用／解复用器的并行通道采用单端ＰＥＣＬＩ／Ｏ,可有效解决上述问题,但在单端与差分接口之间连接时需注意未使用的Ｉ／Ｏ端必须适当连接。差分ＰＥＣＬ输出成帧器ＩＣ与ＭＡＸ３８９１的接口ＭＡＸ３８９１具有单端ＰＥＣＬ输入,与差分ＰＥＣＬ输出的成帧器连接时,成帧器不用的输出必须加终端匹配,在不用的反相输出端接匹配电阻使差分输出负载趋于平衡,减…     

利用化学力显微技术直接测定化学键的强度

本文提出了利用化学力显微镜直接测量化学键强度的实验方法,其基本思想是设法使待测化学键形成于探针与样品之间,这可以通过适当的分子设计并对探针和基底进行修饰来实现。然后在成键的环境下测量探针与样品间的粘附力,并对其进行统计处理,即可计算出键能。本文模拟硫醇在金表面上自组装摹成膜过程,即在无水乙醇溶液中现场检测镀金探针与巯基为末端的自组装膜间的粘附力。然后用ＪＫＲ粘滞理论计算实际成键个数,由此测得Ａｕ－     

In Situ Studies of Surface‐Plasmon‐Resonance‐Coupling Sensor Mediated by Stimuli‐Sensitive Polymer Linker

Hybrid plasmonic nanostructures comprising gold nanoparticle (AuNP) arrays separated from Au substrate through a temperature‐sensitive poly(N‐isopropylacrylamide) (PNIPAM) linker layer are constructed, and unique plasmonic‐coupling‐based surface plasmon resonance (SPR) sensing properties are investigated. The optical properties of the model system are investigated by in situ and scan‐mode SPR analysis. The swelling‐shrinking transitions in the polymer linker brush are studied by in situ contact‐mode atomic force microscopy at two different temperatures in water. It is revealed that the thickness of the PNIPAM layer is decreased from 30 to 14 nm by increasing the temperature from 20 to 32 °C. For the first time the dependence of the coupling behavior in AuNPs is investigated with controlled density on the temperature in a quantitative manner in terms of the change in SPR signals. The device containing AuNPs with optimized AuNP density shows 3.2‐times enhanced sensitivity compared with the control Au film‐PNIPAM sample. The refractive index sensing performance of the Au film‐PNIPAM‐AuNPs is greater than that of Au film‐PNIPAM by 19% when the PNIPAM chains have a collapsed conformation above lower critical solution temperature.     

Surface topographical characterization of silver-plated film on the wedge bondability of leaded IC packages

Strong bond between gold wire and silver-plated leadframe is significantly crucial for maintaining either bondability or reliability during integrated circuit (IC) manufacturing process and IC application in the fields. This study investigated the surface and grain structure of the silver-plated film on the copper leadframe in terms of surface roughness test by atomic force microscopy (AFM), thickness measurement by nano-indentation, and grain structure by transmission electron microscopy (TEM). The characteristics of the silver-plated film surface and structure, e.g., surface roughness, film thickness and grain structure impacted the bonding quality which was verified by the full factorial design of experiment (DOE) wedge pull test. Implications of AFM, TEM and DOE results showed that more smooth and soft crystal surface topography and fewer grain boundaries of silver-plated film provided the higher pull strength which could improve the yield of wedge bondability.     

金纳米粒子有序膜结构的原子力显微研究

通过控制所滴加的金纳米粒子氯仿溶胶的浓度,在高序定向裂解石墨（HOPG）上,可以形成二维乃至三维有序的金纳米粒子膜结构,本文主要利用原子力显微镜中的轻敲原子力（TM－AFM）显微模式,采用形貌与相位同时成像技术以及透射电镜技术,对所形成的有序膜结构进行了系统的表征,并着重阐述了相应成像在表征膜结构方面的重要作用。     

A Green Polymeric Light‐Emitting Diode Material: Poly(9,9‐dioctylfluorene‐alt‐thiophene) End‐Capped with Gold Nanoparticles

Poly(9,9‐dioctylfluorene‐alt‐thiophene copolymer (PDOFT) is functionalized with thiol and end‐capped with in‐situ‐reduced gold nanoparticles (AuNPs). The molecular structure of the resulting material (PDOFT‐Au) is corroborated by ¹H and ¹³C NMR spectroscopy, and direct evidence for the binding between the PDOFT‐bis‐4‐thiol and gold nanoparticles is provided from X‐ray photoelectron spectroscopy. PDOFT‐Au is not only soluble in common organic solvents, but also has a broad range of thermal stability, up to 414 °C. The photoluminescence and electroluminescence spectra show that excitation of PDOFT is virtually unaffected by the end‐capping with gold nanoparticles. However, atomic force microscopy shows that the root‐mean‐square roughness of the PDOFT‐Au film is nearly ten times higher than that of the PDOFT film, resulting in an increased interfacial area between the film and the deposited cathode in a PDOFT‐Au device. This increased interfacial area, together with the photo‐oxidation‐suppressing and hole‐blocking characteristics of AuNPs, significantly enhances the electron injection, lowers the threshold voltage, and increases the electroluminescence (10 521 cd m^–2) and photometric efficiency (1.986 cd A^–1) of the PDOFT‐Au device by nearly an order of magnitude. These increases in electroluminescence and photometric efficiency would be much lower if AuNPs were blended into—rather than capped onto—the copolymer. The Commission International de L'Eclairage color coordinates of PDOFT‐Au (0.237,0.655) are very close to the standard green demanded by the National Television System Committee, making PDOFT‐Au an excellent candidate for a green‐light‐emitting material.     

溶液中细胞色素b6f的原子力显微镜和扫描隧道显微镜观测

本文用原子力显微镜(atomic force microscope,AFM)和扫描隧道显微镜(scanning tunneling microscope,STM)在Tricine-NaOH-OG缓冲溶液中研究了细胞色素b6f(Cytochrome b6f,Cyt b6f)在固体表面上的吸附形态。首先用AFM观察了吸附在云母表面上的cyt b6f复合体,观察到了分散较好的蛋白质颗粒。进一步用高分辨率的电化学STM(EC-STM)观察了吸附在Au(111)表面上的cyt b6f分子,在浓度较低时发现了其二聚体的吸附形态,而在浓度较高时cyt b6f分子在Au(111)表面聚集成薄膜。     

Fabrication of Si-nanowires controlled by spontaneously formed nanoholes on annealed Au thin films

Si nanowires (Si-NWs) were fabricated by a simple process that consists of deposition of Au thin films, annealing of the Au films to form porous structure and Si wet-etching using the kinetically appearing porous Au films as a template. The deformation behavior of the Au thin films was investigated by scanning electron microscopy and atomic force microscopy. The nanohole diameter and density of the Au films can be controlled by selecting Au film thickness, annealing temperature and annealing time. The formation mechanism of these porous Au films can be explained by a model that consists of nanohole formation at the grain boundaries of the Au films and ridge formation by Au atom diffusion to the hole periphery. The ridge structure suppresses further deformation of the Au films and keeps the nanohole structure kinetically stable. When a thermal energy larger than the activation energy to destroy the ridge structure is supplied, it transforms to the island structure.     

Fabrication and Characterization of Stable Ultrathin Film Micropatterns Containing CdS Nanoparticles

Stable, ultrathin micropatterns containing CdS nanoparticles (CdS‐NPs) were fabricated in a two‐step process. In the first step, a precursor film was built‐up by the layer‐by‐layer electrostatic self‐assembly of photosensitive nitro‐diazoresin and mercaptoacetic acid capped CdS nanoparticles. In the second step, the film was selectively exposed to UV light through a photomask and developed in an aqueous solution of sodium dodecylsulfate (SDS). The formation of covalently linked micropatterns was based on the different solubilities of the irradiated and non‐irradiated parts of the film in the developer. Namely, the irradiated regions were cross‐linked and insoluble, whereas the non‐irradiated regions, linked with ionic bonds, were removed by the SDS solution. The resultant patterns were systematically characterized with atomic force microscopy, field emission scanning electron microscopy, optical microscopy, and X‐ray photoelectron spectroscopy.     

Low-temperature Au-induced crystallization of hydrogenated amorphous Si0.5Ge0.5 thin films using Au solution

Low-temperature (∼400 °C) metal-induced crystallization of hydrogenated amorphous Si_0.5Ge_0.5 thin films using Au solution has been investigated by X-ray diffraction, Raman spectra, scanning electron microscopy and atomic force microscopy. It was shown that Au solution significantly promotes the crystallization of the films at low temperatures. The effects of annealing temperature and concentration of the Au solution on the structure and morphology of the films were analyzed. The increase in crystallinity was observed with increasing the annealing temperature. The Raman shifts of Ge–Ge and Si–Ge peaks with the annealing temperature were also discussed.     

一种基于聚合物绝缘层的TIPS-pentacene晶体管性质研究

采用顶接触结构研究制备了以TIPS-pentacene为有源层、聚甲基丙烯酸甲酯(PMMA)为绝缘层的有机场效应晶体管(OFET),其中绝缘层采用溶液旋涂法制备,电极采用Au电极。通过原子力显微镜(AFM)和X射线衍射(XRD)技术对TIPS-pentacene在PMMA上的生长特性进行了详细分析,结果表明,器件获得了良好的电学特性,其场效应迁移率、阈值电压以及开关电流比分别为0.137 cm2/Vs、-19 V和9.74×104。对器件的稳定性也做了详细研究。