基于夹心免疫原理和表面免疫吸附模型，采用Image Pro Plus软件对硅片表面磁颗粒分布图像进行定量化处理，建立了硅片表面心衰标志物可视化联合检测方法。研究表明，该方法从抗体包被到获得检测结果不超过1h，操作简单，在单张硅片上可...基于夹心免疫原理和表面免疫吸附模型，采用Image Pro Plus软件对硅片表面磁颗粒分布图像进行定量化处理，建立了硅片表面心衰标志物可视化联合检测方法。研究表明，该方法从抗体包被到获得检测结果不超过1h，操作简单，在单张硅片上可实现心衰标志物NT_proBNP和cTnI的联合检测。NT—proBNP和cTnI的最低检出限分别为21．8pg／mL和0．034ng／mL，检测范围分别为21．8-40000pg／mL和0．034～50ng／mL。83例不同程度心血管疾病患者的血清样本的检测结果与商品化免疫分析仪检测结果一致，相关系数r〉0．98。因此，该快速免疫检测方法可以满足临床检测心衰标志物的需要。展开更多
Porous silicon （PSi） prepared from Pt metal-assisted chemical etching （MACE） was demonstrated to possess higher hydrosi- lylation efficiency （-57%） than anodized PSi （-11%） by surface reaction with co-undeceny...Porous silicon （PSi） prepared from Pt metal-assisted chemical etching （MACE） was demonstrated to possess higher hydrosi- lylation efficiency （-57%） than anodized PSi （-11%） by surface reaction with co-undecenyl alcohol （UO）. Deconvolution of the SiHx （x = 1-3） stretching bands revealed the abundance of SiH2 species on MaCE PSi was 53%, -10% higher than on ano- dized samples, while both of Sill1 and Sill3 were -5% lower correspondently on MaCE PSi than on anodized samples. The surface SiHx abundances were suggested to account for the higher hydrosilylation efficiency on MaCE PSi. Optimization of Pt-assisted chemical etching parameters suggested a 7-15 nm thick Pt-coating and an etching time of 3-10 min for biochip ap- plications. Scanning electron microscopy images revealed that an isotropic top meso-porous layer was beneficial for hydrosi- lylation and long-term durability under ambient conditions. To end, an example of histidine-tagged protein immobilization and microarray was illustrated. Combining the materials＇ property, surface chemistry, and micro-fabrication technology together, we envision that silicon based biochip applications have a prosperous future.展开更多
文摘基于夹心免疫原理和表面免疫吸附模型，采用Image Pro Plus软件对硅片表面磁颗粒分布图像进行定量化处理，建立了硅片表面心衰标志物可视化联合检测方法。研究表明，该方法从抗体包被到获得检测结果不超过1h，操作简单，在单张硅片上可实现心衰标志物NT_proBNP和cTnI的联合检测。NT—proBNP和cTnI的最低检出限分别为21．8pg／mL和0．034ng／mL，检测范围分别为21．8-40000pg／mL和0．034～50ng／mL。83例不同程度心血管疾病患者的血清样本的检测结果与商品化免疫分析仪检测结果一致，相关系数r〉0．98。因此，该快速免疫检测方法可以满足临床检测心衰标志物的需要。
基金the financial support of the National Basic Research Program of China(2013CB922101)the National Natural Science Foundation of China(20827001,91027019,21021062)
文摘Porous silicon （PSi） prepared from Pt metal-assisted chemical etching （MACE） was demonstrated to possess higher hydrosi- lylation efficiency （-57%） than anodized PSi （-11%） by surface reaction with co-undecenyl alcohol （UO）. Deconvolution of the SiHx （x = 1-3） stretching bands revealed the abundance of SiH2 species on MaCE PSi was 53%, -10% higher than on ano- dized samples, while both of Sill1 and Sill3 were -5% lower correspondently on MaCE PSi than on anodized samples. The surface SiHx abundances were suggested to account for the higher hydrosilylation efficiency on MaCE PSi. Optimization of Pt-assisted chemical etching parameters suggested a 7-15 nm thick Pt-coating and an etching time of 3-10 min for biochip ap- plications. Scanning electron microscopy images revealed that an isotropic top meso-porous layer was beneficial for hydrosi- lylation and long-term durability under ambient conditions. To end, an example of histidine-tagged protein immobilization and microarray was illustrated. Combining the materials＇ property, surface chemistry, and micro-fabrication technology together, we envision that silicon based biochip applications have a prosperous future.
