Evolution of Photocurrent during Coadsorption of Cs and O on GaAs （100）

The photocurrent and spectral response characteristics of gallium arsenide （GaAs） are obtained by a multiinformation measurement system, and the evolution of the photocurrent versus the Cs：O flux ratio is investigated. The experimental results show that the photocurrent increases approximately exponentially after the first exposure to Cs until a maximum sensitivity is reached, the detailed evolution process and the ultimate photocurrent are different for different samples. These differences are analysed, and according to the process of coadsorption of Cs and oxygen on GaAs, an equation is presented to explain the increase of photocurrent.     

基于连续光谱分析的微型生化分析仪及临床试验

介绍了一种基于连续光谱分析的微型生化分析仪及其相应的临床试验。该微型生化分析仪采用后分光设计,具有杂散光小、连续光谱(340～770 nm)实时测量、体积小、重量轻、样品和试剂消耗量小、检测快速直观等优点,在急诊、中小医疗机构和战地救护、医学研究中有很好的应用前景。试验中选取了临床检验中具有代表性的检测项目(如尿酸,总胆固醇和血清白蛋白等),以医院当日的检验标本为试验样本,与医院的标准生化分析仪器(OlympusAU2700全自动生化分析仪、美国雷杜公司半自动生化分析仪RT-1904C,Beckman公司LX-20全自动生化分析仪)进行对比测试和分析。试验结果表明,该微型生化分析仪器已达到临床应用的要求。