Format

Send to

Choose Destination
Chemistry. 2016 Apr 11;22(16):5643-8. doi: 10.1002/chem.201505034. Epub 2016 Mar 7.

Construction of a Graphene/Au-Nanoparticles/Cucurbit[7]uril-Based Sensor for Pb(2+) Sensing.

Author information

1
Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, No. 500, Dongchuan Road, Shanghai, 200241, China.
2
Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, No. 500, Dongchuan Road, Shanghai, 200241, China. lli@chem.ecnu.edu.cn.
3
Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, No. 500, Dongchuan Road, Shanghai, 200241, China. yzxian@chem.ecnu.edu.cn.

Abstract

The development of highly sensitive and selective methods for the detection of lead ion (Pb(2+)) is of great scientific importance. In this work, we develop a new surface-enhanced Raman scattering (SERS)-based sensor for the selective trace measurement of Pb(2+). The SERS-based sensor is assembled from gold nanoparticles (AuNPs) and graphene using cucurbit[7]uril (CB[7]) as a precise molecular glue and a local SERS reporter. Upon the addition of Pb(2+), CB[7] forms stronger complexes with Pb(2+) and desorbs from AuNPs, resulting in a sensitive "turn-off" of SERS signals. This SERS-based assay shows a limit of detection (LOD) of 0.3 nm and a linear detection range from 1 nm to 0.3 μm for Pb(2+). The feasibility of the assay is further demonstrated by probing Pb(2+) in real water samples. This SERS-based analytical method is highly sensitive and selective, and therefore holds promising applications in environmental analysis.

KEYWORDS:

Au; Pb; Raman spectroscopy; graphene; nanoparticles

PMID:
26948157
DOI:
10.1002/chem.201505034

Supplemental Content

Full text links

Icon for Wiley
Loading ...
Support Center