Locally Welded Silver Nano‐Network Transparent Electrodes with High Operational Stability by a Simple Alcohol‐Based Chemical Approach

As an indispensable aspect of emerging flexible optoelectronics, flexible transparent electrodes, especially those comprised of metal nanowires, have attracted great attentions recently. Welding the nanowire junctions is an effective strategy for reducing the sheet resistance and improving the operational stability of flexible nanowire electrode in practical applications. Herein, a simple alcohol‐based solution approach is proposed to weld crossed silver nanowires by chemically growing silver “solder” at the junctions of the nanowires, forming transparent silver nano‐network electrodes with improved electrical conductivity and operational stability. Remarkably, silver nano‐networks can be rapidly formed by this simple approach under ambient condition and room temperature, requiring no assistance from heat, light, electrical current, or mechanical pressure. Furthermore, our results show that the nano‐network electrode formed from large diameter nanowires offers a better operational stability, whose trend is opposite to that of the untreated electrodes. To demonstrate the potential application of the highly stable silver nano‐network from large diameter nanowires, organic solar cells fabricated on the nano‐network electrode incorporated with silicon dioxide nanoparticles achieve comparable performance to the ITO control device. Consequently, strategy demonstrated in this work can contribute to low‐cost and highly stable transparent electrodes in emerging flexible optoelectronics.     

OLED显示设计与实现

介绍了OLED器件的功能、特性、控制逻辑、读写时序等.以一款新型的OLED器件VGG12864K作为显示终端,用嵌入式MCU开发的显示系统.论述了设计方法和设计过程中遇到的实际问题及解决的办法.如电路设计、软件编程、汉字显示实现等.     

Additive-Free Energetic Film Based on Graphene Oxide and Nanoscale Energetic Coordination Polymer for Transient Microchip

Transient microchips have promising applications in data security and privacy protection. A simple fabrication process and short transient time are two crucial requirements for transient microchips. In this study, a facile drop-casting method is used to develop a transient microchip based on an energetic film and a microheater on a substrate. It is found that the graphene oxide-energetic coordination polymer composite based energetic film plays an important role in simplifying the fabrication process and achieving fast transient time due to its inherent film forming ability, strong binding to substrate, and highly energetic characteristics. The interlayer confinement effect of graphene oxide (GO) can significantly reduce the size of energetic coordination polymer (ECP) to nanometer scale. Van der Waals forces between GO layers and coordination bonds between GO and metal ions are responsible for the film formation ability. Furthermore, the reduction of ECP size and the compact stacking lay the foundation for the excellent combustion and pressure production performance of the energetic film. The strong adhesion of the energetic film and the substrate is confirmed by drop experiments. More importantly, the fabricated silicon based transient microchip can achieve self-destruction within 1 second.     

汽车电子辐射抗扰度测试用带状线的研制

根据汽车电子电器组件的辐射抗扰度测试的要求,研制了一套带状线测试装置.利用仿真软件对带状线装置进行结构优化设计,分析了该带状线装置的场强分布.研制的带状线装置的特性阻抗为50 Ω,在300 kHz～400 MHz的频率范围内,电压驻波比(VSWR)小于1.25.当注入20W的信号功率时,带状线装置的测试区最大能产生200 V/m的电场强度.     

全分布式光纤应力传感器的研究新进展

全面综述了全分布式光纤应力传感器的发展概况.对光后向散射技术、光学非线性效应、模式耦合技术和光干涉技术的主要研究方案进行了评述,重点介绍和分析了实现高空间分辨率和动态应力测量的新技术.最后展望并讨论了全分布式应力传感器的发展趋势和应用前景.     

同轨构型下LBF双基谱精度分析

双基谱精度分析是设计成像算法的前提,该文针对同轨等速构型详细给出了LBF(Loffelds bistatic formula)的谱精度分析,当半双基角的余弦值为1和基线长与目标到航线的最近距离的比值等于半双基角的正切值这两个条件同时满足时,LBF谱是完全严格解析的。谱精度不受基线长度和斜视角大小的影响,通过仿真实验分析讨论了各种约束对于谱精度的影响。     

基于R-LWE问题的新型NTRU加密方案

针对NTRU加密方案没有安全性证明的缺点,基于环上差错学习(R-LWE)问题给出了一个在标准模型下可证明安全的NTRU加密方案。新方案首先对NTRU的环结构进行适当的修改,然后通过格上高斯抽样算法生成密钥对,最后基于R-LWE问题对加密过程进行了改进,改进后的NTRU加密方案实现了在标准模型下语义不可区分的选择明文攻击安全性。     

基于嵌入式Qtopia汽车BCM自动检测系统设计

汽车BCM在车身功能控制系统中起着举足轻重的作用,因此汽车BCM出厂前的功能检测一直得到企业和消费者的高度重视。目前多数企业仍使用人工测试的方法,而本次自动检测系统是采用三星公司的S3C2440作为核心控制器,在嵌入式Linux系统下使用Qtopia应用开发平台搭建控制界面添加检测控制程序,通过接口板连接汽车BCM从而实现自动检测功能。     

Design of ternary counter based on adiabatic domino circuit

By researching the ternary counter and low power circuit design method, a novel design of low power ternary Domino counter on switch-level is proposed. Firstly, the switch-level structure expression of ternary loop operation circuit with enable pin is derived according to the switch-signal theory, and the one bit ternary counter is obtained combining the ternary adiabatic Domino literal operation circuit and buffer. Then the switch-level structure expression of enable signal circuit is derived, and the four bits ternary counter is obtained by cascade connection. Finally, the circuit is simulated by Spice tool and the output waveforms transform in proper order indicating that the logic function is correct. The energy consumption of the four bits ternary adiabatic Domino counter is 63% less than the conventional Domino counterpart.     

Liquid Metal Based Island‐Bridge Architectures for All Printed Stretchable Electrochemical Devices

The adoption of epidermal electronics into everyday life requires new design and fabrication paradigms, transitioning away from traditional rigid, bulky electronics towards soft devices that adapt with high intimacy to the human body. Here, a new strategy is reported for fabricating achieving highly stretchable “island‐bridge” (IB) electrochemical devices based on thick‐film printing process involving merging the deterministic IB architecture with stress‐enduring composite silver (Ag) inks based on eutectic gallium‐indium particles (EGaInPs) as dynamic electrical anchors within the inside the percolated network. The fabrication of free‐standing soft Ag‐EGaInPs‐based serpentine “bridges” enables the printed microstructures to maintain mechanical and electrical properties under an extreme (≈800%) strain. Coupling these highly stretchable “bridges” with rigid multifunctional “island” electrodes allows the realization of electrochemical devices that can sustain high mechanical deformation while displaying an extremely attractive and stable electrochemical performance. The advantages and practical utility of the new printed Ag‐liquid metal‐based island‐bridge designs are discussed and illustrated using a wearable biofuel cell. Such new scalable and tunable fabrication strategy will allow to incorporate a wide range of materials into a single device towards a wide range of applications in wearable electronics.