Raman And Surface-Enhanced Raman Spectroscopic Study On 60&70 Fullerenre Organic Solutions And Thin Films

Buckminster fullerene C60, as well as its football-like brother C70, arouses exhaustless interests of researchers ever since their discovery, not only because of their perfectly symmetrical molecular structure, but also because of their fantastic properties and promising utility foreground.Many of their utilities, if not all, depend on their interaction with other materials in forms of films, surfaces and interfaces. Surface-enhanced Raman Spectroscopy (SERS), using photons as non-damaged in situ probe, provides more information of molecular structures and interactions at less cost of models and hypotheses, proves to be one of the most accurate and profitable methods in surface and interface study.Based on comprehensive study of solubility and spectroscopic properties of 60&70 fullerenes in a number of solvents, we chose pyridine as a media solvent in the present work to help set up fullerene SERS systems in hydrosols as well as on roughen surfaces of noble metals. High-quality SERS spectra were recorded, comparison of which revealed important details about adsorption modes and interaction between fullerene molecules and metal structures.A series of related experiments have been carried out to investigate the extensive properties of C60&C70 in forms of organic solutions and thin films; several kinds of characterizing methods included: UV-Vis-NIR absorbance, infrared spectra, photo-induced fluorescence, scanning and transmission electronic microscopy, etc. As to Raman and SERS experimental, different excitations at 1064nm, 514.5nm and 325nm,respectively, have been applied. The results called for further discussions upon the mechanism study of SERS effect.Possible applications of 60&70 fullerenes were also explored, which pointed to organic LED material and quantitative microanalysis, to name some of them.