Issue 104, 2014

Highly portable fluorescent turn-on sensor for sulfide anions based on silicon nanowires

Abstract

By covalently modifying 3-[2-(2-aminoethylamino)ethylamino]propyl-trimethoxysilane (ligand) and 4-amino-1,8-naphthalic anhydride (fluorophore) onto the surface of silicon nanowires (SiNWs) and subsequently complexing them with copper ions (Cu2+), a SiNWs-based fluorescent sensor for sulfide anions (S2−) was realized. Based on such a ligand/Cu2+ approach, the new type of sensor realizes rapid sensing of S2−, and exhibits high sensitivity and selectivity for S2− in water. Moreover, the as-prepared SiNW arrays-based sensor was successfully used in real time and in-situ monitoring of S2− in running water by directly inserting it into the water. The present SiNW arrays-based sensor can be developed into a portable commercial device applied in environmental analysis after further optimizing the technique and finely quantifying the response of the sensor.

Graphical abstract: Highly portable fluorescent turn-on sensor for sulfide anions based on silicon nanowires

Supplementary files

Article information

Article type
Paper
Submitted
22 Sep 2014
Accepted
05 Nov 2014
First published
06 Nov 2014

RSC Adv., 2014,4, 60086-60091

Author version available

Highly portable fluorescent turn-on sensor for sulfide anions based on silicon nanowires

H. Wang, L. Mu, L. Jin, G. She, H. Xu and W. Shi, RSC Adv., 2014, 4, 60086 DOI: 10.1039/C4RA10963E

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