Electrochemical growth of flowerlike gold nanoparticles on polydopamine modified ITO glass for SERS application

• Published in: Electrochimica acta Vol. 55; no. 6; pp. 2004 - 2009
• Main Authors: Ye, Weichun, Wang, Daoai, Zhang, Hong, Zhou, Feng, Liu, Weimin
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 15.02.2010; Elsevier
• Subjects: Chemistry; Coating; Electrochemical deposition; Electrochemistry; Electrodeposition; Exact sciences and technology; Flowerlike gold nanostructure; General and physical chemistry; Glass; Gold; Indium tin oxide; Nanomaterials; Nanostructure; Nucleation; Polydopamine; Polymerization; Study of interfaces; Surface-enhanced Raman scattering; Electrochemical deposition; Polydopamine; Flowerlike gold nanostructure; Surface-enhanced Raman scattering; Scanning electron microscopy; Gold; Indium tin oxide electrode; Indole derivative polymer; Nanoparticle; Transition metal; Nanostructure; X ray diffraction; Surface structure; Morphology; Surface Enhanced Raman Spectrometry; Electrodeposition; Raman spectrometry; Electrochemical reaction; Modified material
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2009.11.022

A functional biopolymer – polydopamine (Pdop) layer was easily modified on the surface of indium tin oxide substrates by spontaneous oxidative polymerization in a dopamine solution. The Pdop layer functions as a novel and promising protector for electrochemical growth of flowerlike gold nanostructures (AuNFs). Electrochemical investigations and SEM results demonstrate that Pdop coating is favored to rapid gold nucleation. The application of AuNFs in surface-enhanced Raman scattering is investigated by using rhodamine 6G as probe molecule. Its detection limit reaches as low as 10 −12 M. Pdop coating as a functional platform to prepare AuNFs is promising for potential applications in sensitive optical chemical sensors.