Jump to main content
Jump to site search

Issue 6, 2019
Previous Article Next Article

A single gold nanoprobe for colorimetric detection of silver(i) ions with dark-field microscopy

Author affiliations

Abstract

Highly sensitive colorimetric detection of silver(I) ions (Ag+) at the single-particle level was developed based on the color of a gold nanoparticle (AuNP) assembly captured by dark-field microscopy (DFM) imaging. Formation of C–Ag+–C bonding between cytosines was utilized to induce interparticle coupling of AuNPs modified with single-strand DNA, resulting in a color change as the signal transduction to quantify Ag+ under DFM imaging. This method allowed visual quantitation of Ag+ in the range of 0.05 nM–250.00 nM and a detection limit of 28.8 pM was achieved. Furthermore, we demonstrated its applicability for the colorimetric detection of Ag+ in a small quantity of real samples, showing the good potential of this developed method for environmental monitoring and drug quality control.

Graphical abstract: A single gold nanoprobe for colorimetric detection of silver(i) ions with dark-field microscopy

Back to tab navigation

Supplementary files

Article information


Submitted
11 Dec 2018
Accepted
10 Jan 2019
First published
10 Jan 2019

Analyst, 2019,144, 2011-2016
Article type
Paper

A single gold nanoprobe for colorimetric detection of silver(I) ions with dark-field microscopy

Y. F. Xie, Y. Y. Cheng, M. L. Liu, H. Y. Zou and C. Z. Huang, Analyst, 2019, 144, 2011
DOI: 10.1039/C8AN02397B

Social activity

Search articles by author

Spotlight

Advertisements