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Platinum Films with Controlled 3‐Dimensional Nanoscopic Morphologies and Their Effects on Surface Enhanced Raman Scattering
Author(s) -
Lee HyunJu,
Lee UHwang,
Park JinYoung,
Yoo SangHoon,
Park Sungho,
Kwon YoungUk
Publication year - 2009
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.200900109
Subject(s) - rhodamine 6g , materials science , nanostructure , nanoscopic scale , raman scattering , nanorod , nanotechnology , mesoporous material , thin film , mesoporous silica , raman spectroscopy , porosity , platinum , chemical engineering , optoelectronics , optics , composite material , fluorescence , chemistry , biochemistry , physics , engineering , catalysis
The synthesis of Pt thin films with a controlled nanoscopic architecture that can support surface enhanced Raman scattering (SERS) is reported. The syntheses are achieved by replicating the pores of a type of mesoporous silica thin film whose pore structure could be described as a regular array of vertical channels of ∼9 nm in diameter and their interconnections, forming a 3‐dimensional pore network. Electrochemical deposition into the pores followed by the removal of the templates produced Pt films composed of arrays of vertically standing Pt nanorods with narrow gaps between them. The 3‐dimensional nanostructure increases the surface area and enables the Pt film to absorb visible light. SERS studies of rhodamine 6G and benzenethiol on such Pt films as substrates reveals that the control of the nanostructure is critical for the SERS effect.