title   
  

L-cysteine-mediated self-assembled Ag-Au nanoparticles as fractal patterns with bowling-alley-like hollow arrays for electrochemical sensing of dopamine

Siddique, Samia İftikhar and Shawuti, Shalima and Sirajuddin, and Kolkar, Javed and Qureshi, Anjum (2019) L-cysteine-mediated self-assembled Ag-Au nanoparticles as fractal patterns with bowling-alley-like hollow arrays for electrochemical sensing of dopamine. Industrial and Engineering Chemistry Research, 58 (19). pp. 8035-8043. ISSN 0888-5885

[img]PDF - Registered users only - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
9Mb

Official URL: http://dx.doi.org/10.1021/acs.iecr.9b00016

Abstract

In this study, hierarchical self-assembly of Au-Ag fractal patterns with bowling-alley-like hollow arrays was achieved by a hydrothermal method using L-cysteine as an environmentally friendly reducing and stabilizing reagent. Here, free thiol groups of cysteine molecules electrostatically stabilized gold and silver nanoparticles (NPs). The plasmonic resonance red-shift of Au-Ag was confirmed from self-assembled fractal patterns that consist of micro/nano fern structures forming bowling-alley-like hollow arrays. The as-synthesized large-area hierarchical self-assembly of Au-Ag fractal patterns with the synergistic catalytic advantage of a Au and Ag NPs/glassy carbon electrode (GCE) is investigated as a potential electrochemical dopamine (DA) sensor. The biosensor based on a GCE modified with bimetallic nanoparticle fractals exhibited a reversible electrochemical behavior with limits of detection and quantification of 0.014 and 0.048 mu M, respectively. Detection of DA using the developed electrochemical sensor has several advantages, such as low cost, ease-of-use, sensitivity, and stability, that can be potentially applied for detection in a variety of chemical and biosensing applications.

Item Type:Article
Subjects:Q Science > QD Chemistry
Q Science > QC Physics
ID Code:37845
Deposited By:Anjum Qureshi
Deposited On:24 Aug 2019 12:21
Last Modified:24 Aug 2019 12:21

Repository Staff Only: item control page