title: Surface-enhanced Raman scattering-active silver nanostructures with two domains.
abstract: Generally, a controllable and reproduced surface roughness for surface-enhanced Raman scattering (SERS) studies can be generated through control of the electrochemical oxidation-reduction cycles (ORC) procedure. In this work, we propose a new sonoelectrochemical approach to prepare SERS-active substrates with two domain-Ag nanostructures. The method is based on a strategy of deposition-dissolution cycles (DDCs) by using a cathodic overpotential and an anodic overpotential from open circuit potential (OCP) in turn under sonication. The prepared SERS-active substrate demonstrates large Raman scattering enhancement for adsorbed Rhodamine 6G (R6G) with an enhancement factor of 2.3×10(8) and a limit of detection of 2×10(-13)M. The improved SERS performances can be successfully explained from the viewpoints of electromagnetic (EM) and chemical (CHEM) enhancements.
authors: Division of Gastroenterology and Hepatology, Department of Internal Medicine, Taipei Medical University Hospital, Taipei, Taiwan.
authors: Chun-Chao
authors: CC
authors: Chang
authors: Kuang-Hsuan
authors: KH
authors: Yang
authors: Yu-Chuan
authors: YC
authors: Liu
authors: Chung-Chin
authors: CC
authors: Yu
mesh_terms: D055664:Electrochemical Techniques; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010984:Platinum / Q000737:chemistry; D012235:Rhodamines / Q000737:chemistry; D012834:Silver / Q000737:chemistry*; D013010:Sonication; D013059:Spectrum Analysis, Raman
chemical_list: D012235:Rhodamines; C026188:rhodamine 6G; D012834:Silver; D010984:Platinum