Accelerated color change of gold nanoparticles assembled by DNAzymes for simple and fast colorimetric Pb2+ detection
Accelerated color change of gold nanoparticles assembled by DNAzymes for simple and fast colorimetric Pb2+ detection
复制标题
DOI：
10.1021/ja046628h
复制
发表时间：
2004-10-06
影响因子：
15
通讯作者：
Lu, Y
中科院分区：
文献类型：
--
作者：
Liu, JW;Lu, Y
DNAzymes的高金属选择性与金属纳米颗粒的强距离依赖光学性质相结合，为设计金属离子比色传感器提供了相当大的机会。我们之前交流了一种基于Pb2+依赖性DNAzyme组装金纳米粒子的比色引线传感器的设计。然而，加热到50度，然后冷却大约2小时，才能观察到颜色的变化。在此，我们报告了一种新的改进设计，允许快速(
The combination of high metal selectivity of DNAzymes with the strong distance-dependent optical properties of metallic nanoparticles has presented considerable opportunities for designing colorimetric sensors for metal ions. We previously communicated a design for a colorimetric lead sensor based on the assembly of gold nanoparticles by a Pb2+-dependent DNAzyme. However, heating to 50 degreesC followed by a cooling process of similar to2 h was required to observe the color change. Herein we report a new improved design that allows fast (