120th General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation of Young Analytical Chemists I
Room No. Room C311+C312
Time THU 09:34-:
Code ANAL1.O-10
Subject Surface-Enhanced Raman Scattering of Gold Nanourchins with Sharp and Short Branches
Authors MINJUNG SEO, JI WON HA*
Department of Chemistry, University of Ulsan, Korea
Abstract Raman spectroscopy is a useful technique to observe vibrational, rotational, and other low-frequency modes in a system. Raman spectroscopy is complementary with IR and can be used when IR is forbidden. But, spontaneous Raman scattering is typically very weak compared with Rayleigh scattering because Raman intensity is almost 0.001% of the source intensity. Therefore, it is important to develop methods to enhance the signals. SERS (Surface Enhanced-Raman Scattering) is one of the methods that can enhance the signals up to 〖10〗^11. It is the basic principle of SERS that enhances Raman scattering by molecules adsorbed on rough metal surfaces or nanostructures. Various conditions are required for SERS. In the present study, we tried to optimize SERS with gold nanourchins (AuNUs) having sharp tips and rough surface. We tried SERS effect with R6G, p-aminothiophenol as probe molecules, 100-nm AuNUs. Raman spectra were measured with confocal homemade-Raman spectroscopy, and a 785-nm diode laser was used as a radiation source. LSPR peak of 100-nm AuNUs is close to 785-nm laser for resonance effect.
E-mail minjung7760@naver.com