Issue 72, 2015

A colorimetric Boolean INHIBIT logic gate for the determination of sulfide based on citrate-capped gold nanoparticles

Abstract

Herein, we designed a noncommutative logic gate (INHIBIT gate) by utilizing citrate-capped AuNPs as a signal transducer and S2− and TU as mechanical activators and devised a colorimetric sensor for inexpensive, label-free, rapid, sensitive and selective determination of S2−. Under the optimum conditions, 4 μM S2− could induce a significant color change which can be directly recognized by naked eyes. The calibration curve for the absorbance ratios of A680/A520 against S2− concentration was linear in the range from 2 to 9 μM and the RSD was 1.3% for the determination of 4 μM S2− (n = 6). Moreover, this logic gate was successfully applied for sensing S2− in various practical samples, implying its wide applications in food, environment, and biological system.

Graphical abstract: A colorimetric Boolean INHIBIT logic gate for the determination of sulfide based on citrate-capped gold nanoparticles

Supplementary files

Article information

Article type
Paper
Submitted
28 May 2015
Accepted
29 Jun 2015
First published
29 Jun 2015

RSC Adv., 2015,5, 58574-58579

Author version available

A colorimetric Boolean INHIBIT logic gate for the determination of sulfide based on citrate-capped gold nanoparticles

H. Deng, G. Wu, X. Lin, X. Xu, A. Liu, X. Xia and W. Chen, RSC Adv., 2015, 5, 58574 DOI: 10.1039/C5RA10085B

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