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Large tuning of Surface Plasmon Resonance of Au-fullerene nanocomposite
Ritu Vishnoi,Satakshi Gupta,Ganesh D. Sharma,Rahul Singhal 대한금속·재료학회 2019 ELECTRONIC MATERIALS LETTERS Vol.15 No.1
Gold–fullerene C 60 nanocomposite thin fi lms prepared by thermal co-deposition were irradiated by a high energy beam of120 MeV Ag ions using Pelletron accelerator. Absorption spectra revealed a large and progressive tuning of surface plasmonresonance wavelength when the fi lms were irradiated at higher fl uences. This blue shift (~ 119 nm) can be ascribed to theevolution of fullerene into amorphous carbon upon bombardment of high energy ions at higher fl uences and causes a shiftin refractive index of the matrix. Raman spectra ascertained this transformation with the presence of two bands: D and Gband. Ion irradiation also leads to the formation of bigger size Au nanoparticles with well defi ned spherical shape at higherfl uences as confi rmed by TEM. XRD results demonstrated decrease in FWHM of diff raction peaks indicating the increasein particle size which is in agreement with the result obtained from TEM analysis.