A highly selective and sensitive on-off sensor for silver ions and cysteine by light scattering technique of DNA-functionalized gold nanoparticles

作者：Feng, Da-Qian; Liu, Guoliang; Zheng, Wenjie; Liu, Jie; Chen, Tianfeng; Li, Dan^*

来源：Chemical communications, 2011, 47(30): 8557-8559.

DOI：10.1039/c1cc12377g

• COLORIMETRIC DETECTION
• BASE-PAIR
• ONE-STEP
• RESONANCE
• ASSAY
• HG2+
• HYBRIDIZATION
• AGGREGATION
• FLUORESCENT
• AG+

DNA-functionalized gold nanoparticles are shown to act as a light-scattering switch. Ag+ ion turns on the switch through the DNA-Au NPs conjugates based on the formation of cytosine-Ag+-cytosine base pairs, whereas cysteine turns off the light-scattering signal because it competitively binds to Ag+

• 出版日期2011
• 单位暨南大学; 汕头大学