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- Title
Amino-Containing Ultrafine Organosilica-Nanoparticle-Modified Au Electrode for the Determination of Cu(II) Ions.
- Authors
Wu, Zhongwei; Liao, Jinjin; Xiao, Jianlin; Liu, Jianyun; Yang, Jianmao; Zhou, Xin; Xin, Meng
- Abstract
Using 3-Aminopropyltriethoxysilane(APTES) as a single silica source, an amino-rich ultrafine organosilica-nanoparticle-modified Au electrode was fabricated, following the formation of (3-mercaptopropyl)-trimethoxysilane (MPTS) monolayer on Au surface (MPTS/Au). With cetyltrimethylammonium bromide as an additive, APTES-based gel particles on the electrode have a narrow particle size distribution of 4-7 nm and 'crystal-like' structure. AFM and electrochemical characterization confirmed the successful grafting of APTES nanoparticles on MPTS/Au. The APTES/MPTS/Au electrode is highly sensitive for the detection of copper(II) ions with a detection limit as low as 1.6×10−12 mol L−1 ( S/N>3) by square wave voltammetry. The current is linear to copper(II) concentration between 1.6×10−12 and 6.25×10−10 mol L−1.
- Subjects
NANOPARTICLES; COPPER; MONOMOLECULAR films; ELECTRODES; CETYLTRIMETHYLAMMONIUM bromide; PARTICLE size distribution
- Publication
Electroanalysis, 2013, Vol 25, Issue 11, p2557
- ISSN
1040-0397
- Publication type
Article
- DOI
10.1002/elan.201300355