Crystal structure, electrical properties and Raman spectra of BaBi1-xPbxO3 are reported. The result of x-ray diffraction shows that the specimen is pure, and the lattice parameters decrease continuously in the semicon...Crystal structure, electrical properties and Raman spectra of BaBi1-xPbxO3 are reported. The result of x-ray diffraction shows that the specimen is pure, and the lattice parameters decrease continuously in the semiconducting range, whereas it vibrates similarly to a sine wave in the superconducting range, which is ascribed to the existence of oxygen vacancies and the function of breathing modes of Bi（Pb）O6. The temperature dependence of resistivity indicates that the electrical property of the samples is connected sensitively with the crystal structures. Raman spectra show that the specimen becomes disorder when x increases, and the critical temperature To depends not only on the deformation potential of the soft A19 mode derived from the Bi（Pb）O6 rigid rotation, but also on the energy shift of the mode.展开更多
采用二元混合自组装膜修饰纳米金颗粒,在经自组装单分子层修饰的金电极上阵列式排布,并通过共价键固定抗体形成生物敏感膜。采用原子力显微镜、扫描电镜和阻抗谱分别对电极表面的修饰过程进行了表征。纳米粒子在微电极表面均匀分布,没...采用二元混合自组装膜修饰纳米金颗粒,在经自组装单分子层修饰的金电极上阵列式排布,并通过共价键固定抗体形成生物敏感膜。采用原子力显微镜、扫描电镜和阻抗谱分别对电极表面的修饰过程进行了表征。纳米粒子在微电极表面均匀分布,没有明显的团聚,并且可实现抗体有效固定。基于标准互补金属氧化物半导体(Complementary metal oxide semiconductor,CMOS)工艺和微加工技术,利用该抗体固定化方法,制备了糖化血红蛋白免疫微传感器,可同时检测血液中的糖化血红蛋白和血红蛋白含量,其对糖化血红蛋白和血红蛋白的检测范围分别为14～170μg/L和167～570μg/L。展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 10104013 and 50421201, and the National Basic Research Programme of China under Grant No 2006CB601003.
文摘Crystal structure, electrical properties and Raman spectra of BaBi1-xPbxO3 are reported. The result of x-ray diffraction shows that the specimen is pure, and the lattice parameters decrease continuously in the semiconducting range, whereas it vibrates similarly to a sine wave in the superconducting range, which is ascribed to the existence of oxygen vacancies and the function of breathing modes of Bi（Pb）O6. The temperature dependence of resistivity indicates that the electrical property of the samples is connected sensitively with the crystal structures. Raman spectra show that the specimen becomes disorder when x increases, and the critical temperature To depends not only on the deformation potential of the soft A19 mode derived from the Bi（Pb）O6 rigid rotation, but also on the energy shift of the mode.
文摘采用二元混合自组装膜修饰纳米金颗粒,在经自组装单分子层修饰的金电极上阵列式排布,并通过共价键固定抗体形成生物敏感膜。采用原子力显微镜、扫描电镜和阻抗谱分别对电极表面的修饰过程进行了表征。纳米粒子在微电极表面均匀分布,没有明显的团聚,并且可实现抗体有效固定。基于标准互补金属氧化物半导体(Complementary metal oxide semiconductor,CMOS)工艺和微加工技术,利用该抗体固定化方法,制备了糖化血红蛋白免疫微传感器,可同时检测血液中的糖化血红蛋白和血红蛋白含量,其对糖化血红蛋白和血红蛋白的检测范围分别为14～170μg/L和167～570μg/L。
