Uniform Surface, The Stability Of The Gold Film Preparation On The Surface Enhanced Raman Spectroscopy Applications

Surface enhanced Raman scattering (SERS) spectroscopy as one of the most sensitive technologies for detection of adsorbed molecules on nanostructured metal surfaces at monolayer or sub-monolayer level has been broadly applied in chemistry, biology, and anti-corrosion of metal. Hence, preparation of the SERS-active substrate with reproducible and high Raman scattering enhancement in two-dimension becomes a key and attractive project for meeting the need of Raman chemical mapping or imaging. A lot of methods to prepare metal film or array have been investigated, such as self-assembly, template method, photolithography, nanoimprint lithography and so on.Inositol hexakisphosphoric molecules (shortly named as IP6) are easy to form IP6 micelles by their self-organization due to 6 phosphates of IP6 separately in the both sides of cyclohexane and IP6 micelles possess capability of capturing metal nanoparticles. Due to the existing fashion of inositol hexakisphosphoric molecule depending on the pH media, in present work, we adjust pH values of IP6 solutions for forming various structures of IP6-micelles films at the indium tin oxide (ITO) glass surfaces and then the resulting IP6-micelles film can capture gold nanoparticles (AuNPs) for two-dimensional SERS substrates. A group of materials contain foil, silicon wafer and ITO glass can be used as framework of two-dimensional metal film. At present, these substrate materials have put up satisfactory performance in the fields of SERS research.