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光纤拉曼生化传感器是一种基于拉曼散射原理的光纤传感器,它结合了拉曼散射光谱技术和光纤传输的优势,具有体积小、无需标记、高灵敏度和特异性,能够实现实时快速检测的特点,可以广泛应用于生化检测领域低浓度分析物的检测。对光纤拉曼生化传感器的基本原理、结构和工作方式进行相关介绍,以它在食品安全、环境监测和生物医学等多个领域的实际应用为切入点,重点介绍了不同结构光纤拉曼探针的制备过程和对实际分析物的检测限。此外,总结了当前光纤拉曼生物传感器面临的挑战和未来的发展方向,进一步就如何提高光纤拉曼传感器的性能进行了相关讨论。 相似文献
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ChristinaNickolas 《今日电子》2004,(3):1-1
美国马里兰大学(位于美国马里兰州CollegePark)的研究人员发现半导体碳纳米管的迁移率比其他半导体材料高25%,比硅高70%。这些发现有望促使碳纳米管在从计算机芯片到生化传感器的各类应用中取代传统半导体材料。 相似文献
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《电子设计工程》2012,20(11):178
横跨多重电子应用领域、全球领先的半导体供应商、全球最大的消费电子和便携设备MEMS传感器供应商意法半导体推出拥有9个自由度的新系列一体化传感器模块,让体积紧凑的便携设备能够实现先进的运动位置检测功能、移动定位服务(LBS)和室内导航。运动位置检测功能整合给智能手机、平板电脑、个人导航仪等便携产品带来新契机。市场调研机构IHS iSuppli预测,到2015年,手机和平板电脑运动传感器销售量将达到40亿颗,意法半导体的iNEMO系列惯性传感器在一个封装内整合1颗3轴加速度计、1颗3轴陀螺仪和1颗3轴磁力计,兼备优异的传感器性能和9自由度(DOF)惯性感应功能。 相似文献
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一种实用可靠的氢气检测器 总被引:1,自引:0,他引:1
本文洋细介绍一种采用集成化硅半导体场效应传感器MQ51为敏感器件的氢气检测器,分析了影响检测准确性的因素,并给出了提高检测精度的措施。 相似文献
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Aluminium was a primary material for interconnection in integrated circuits (ICs) since their inception. Later, copper was introduced as interconnect material which has better metallic conductivity and resistance to electromigration. As the aggressive technology scaling continues, the copper resistivity increased because of size effects, which causes increase in delay, power dissipation and electromigration. The need to reduce the resistor-capacitor??????? delay, dynamic power utilisation and the crosstalk commotion is as of now the fundamental main impetus behind the presentation of new materials. The purpose of this paper is to do a survey of interconnect material used in IC from introduction of ICs to till date. This paper studies and reviews new materials available for interconnect application which are optical interconnects, carbon nanotube (CNT), graphene nanoribbons (GNRs) and silicon nanowires which are alternatives to copper. While doing a survey of interconnect material, it is found that multiwalled CNTs, multilayer GNR and mixed CNT bundles are promising candidates and are ultimate choice that can strongly address the problems faced by copper but on integration basis copper would last for coming years. 相似文献
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OBIST methodology incorporating modified sensitivity of pulses for active analogue filter components
In this paper, oscillation-based built-in self-test method is used to diagnose catastrophic and parametric faults in integrated circuits. Sallen–Key low pass filter and high pass filter circuits with different gains are used to investigate defects. Variation in seven parameters of operational amplifier (OP-AMP) like gain, input impedance, output impedance, slew rate, input bias current, input offset current, input offset voltage and catastrophic as well as parametric defects in components outside OP-AMP are introduced in the circuit and simulation results are analysed. Oscillator output signal is converted to pulses which are used to generate a signature of the circuit. The signature and pulse count changes with the type of fault present in the circuit under test (CUT). The change in oscillation frequency is observed for fault detection. Designer has flexibility to predefine tolerance band of cut-off frequency and range of pulses for which circuit should be accepted. The fault coverage depends upon the required tolerance band of the CUT. We propose a modification of sensitivity of parameter (pulses) to avoid test escape and enhance yield. Result shows that the method provides 100% fault coverage for catastrophic faults. 相似文献
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随着太赫兹技术的应用和发展,对大功率太赫兹固态源的需求愈加迫切。文中基于GaN肖特基二极管(SBD)工艺设计并制造了具有高功率输出的170 GHz和340 GHz太赫兹倍频器,实现了340 GHz大功率太赫兹固态倍频链。采用多管芯GaN SBD提高器件功率承载能力,综合开展电路优化设计提升倍频性能,通过仿真研究和实验测试,验证了倍频器设计的有效性和先进性。170 GHz倍频器的实测峰值输出功率达到580 mW,倍频效率为14.5%。340 GHz倍频器的实测峰值输出功率为66 mW,倍频效率为12.5%。该太赫兹固态倍频链性能优良,在太赫兹系统中具有重要的应用价值。 相似文献
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聚对苯撑苯并双(口恶)唑发光及其器件制备 总被引:2,自引:0,他引:2
采用光谱技术,研究了聚对苯撑苯并双(口恶)唑(PBO)溶液的光敏发光特性,并用相对法估算出溶液发光效率在50%范围.结合光谱技术、半导体电学和电化学等研究手段,具体研究了以PBO为发光层的单层电致发光器件,研究结果显示,电致发光与薄膜的光致发光有具有相同的发光中心,峰值位于510 nm左右.同时发现,由于存制备过程中不同处理条件使得不同厚度薄膜残留的掺杂物质浓度不同,从而引起薄膜的导电性的不同.使得器件的阈值场强随PBO厚度的减小而逐渐增加. 相似文献
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应用低压多晶硅TFT和高压多晶硅TFT组合开发成功高分辨率(〉300ppi)LCD/OEL显示系统,也就是说,将受激准分子激光结晶化(ELC)TFT用于耐高压显示电路,而将选择扩大激光结晶化(SELAX)TFT用于低功耗高性能显示电路。在这两种混合型的TFT中,扩大激光结晶化(SELAX)TFT成功地整合了显示系统大电流驱动的可靠性。 相似文献
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Colloidal core/shell quantum dots (QDs) are promising for solar technologies because of their excellent optoelectronic properties including tunable light absorption/emission spectra, high photoluminescence quantum yield (PLQY), suppressed Auger recombination, efficient charge separation/transfer, and outstanding photo-/thermal-/chemical stability. In this review, engineered core/shell QDs with various types of band structures and corresponding device performance in luminescent solar concentrators (LSCs), light-emitting diodes (LEDs), solar-driven photoelectrochemical (PEC) devices, and QDs-sensitized solar cells (QDSCs) are summarized. In particular, the applications of interfacial layer engineering and eco-friendly, heavy metal-free core/shell QDs in optoelectronic devices are highlighted. Finally, strategies towards the developments and practical perspectives of core/shell QDs are briefly mentioned to offer guidelines for achieving prospective high-efficiency and long-term stable QD devices. 相似文献