3 条结果 关键词:汞离子检测 ×

A novel probe density controllable electrochemiluminescence biosensor for ultra-sensitive detection of Hg2+ based on DNA hybridization optimization with gold nanoparticles array patterned self-assembly platform.

Biosensors & bioelectronics 2013 Gao W, Zhang A, Chen Y, Chen Z 等 7 人

基于DNA杂交的生物传感器有望通过调控探针在换能器表面的分布与取向,提高杂交效率并进一步提升灵敏度。本文报道了一种新型电化学发光(ECL)生物传感器策略:将DNA信标分散锚定在电沉积于玻碳电极表面的金纳米粒子(GNP)阵列上,而非简单铺展在平面金表面,从而挖掘现有ECL体系的灵敏度潜力。作者构建了“信号开启”型ECL传感开关用于超灵...

"Molecular beacon"-directed fluorescence of Hoechst dyes for visual detection of Hg(II) and biothiols and its application for a logic gate.

Chemical communications (Cambridge, England) 2013 Zhang M, Le HN, Jiang XQ, Ye BC

本研究开发了一种分子信标样DNA发夹生物传感器,利用Hoechst染料对富AT双链DNA小沟结合后的荧光增强效应,实现Hg2+和生物硫醇的无标记荧光检测。ATprobe在Hg2+诱导下形成T-Hg2+-T茎环发夹,为Hoechst染料提供结合位点,使其荧光由弱变强;随后Cys、Hcys、GSH等生物硫醇通过硫醇-Hg2+作用夺取Hg...

Design of label-free, homogeneous biosensing platform based on plasmonic coupling and surface-enhanced Raman scattering using unmodified gold nanoparticles.

Biosensors & bioelectronics 2013 Yi Z, Li XY, Liu FJ, Jin PY 等 6 人

表面增强拉曼散射(SERS)已成为生物传感中有前景的光谱技术,但现有SERS生物传感器通常需耗时且复杂地修饰金属纳米颗粒,限制其应用。本文报道了一种基于未修饰金纳米颗粒(Au NPs)的无标记、均相、易操作生物传感平台,用于快速、简便、灵敏的SERS检测。该策略利用单链DNA(ssDNA)与双链DNA(dsDNA)在柠檬酸包覆Au ...