Amino‐Containing Ultrafine Organosilica‐Nanoparticle‐Modified Au Electrode for the Determination of Cu(II) Ions. Issue 11 (18th October 2013)

• Record Type: Journal Article
• Authors: Wu, Zhongwei; Liao, Jinjin; Xiao, Jianlin; Liu, Jianyun; Yang, Jianmao; Zhou, Xin; Xin, Meng
• Is Part Of: Electroanalysis. Volume 25:Issue 11(2013:Nov.)
• Page Start: 2557
• Page End: 2566
• Publication Date: 2013-10-18
• Subjects: Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201300355
• Languages: English
• ISSNs: 1040-0397

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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 (<italic>S/N</italic>&gt;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.</p> </abstract>