L-Cysteine-Mediated Self-Assembled Ag-Au Nanoparticles As Fractal Patterns with Bowling-Alley-like Hollow Arrays for Electrochemical Sensing of Dopamine 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Industrial & Engineering Chemistry Research
年/卷/期
2019 / 58 / 19
页码
8035-8043
ISSN号
0888-5885
作者单位
Sabanci Univ, SUNUM Nanotechnol Res Ctr, TR-34956 Istanbul, Turkey;Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Istanbul, Turkey;Univ Sindh, Natl Ctr Excellence Analyt Chem, Jamshoro 76080, Pakistan;Sabanci Univ, SUNUM Nanotechnol Res Ctr, TR-34956 Istanbul, Turkey;Sabanci Univ, SUNUM Nanotechnol Res Ctr, TR-34956 Istanbul, Turkey;
作者
Siddiqui, Samia;Shawuti, Shalima;Sirajuddin;Niazi, Javed H.;Qureshi, Anjum;
摘要
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.
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