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| Type |
Poster Presentation |
| Area |
Analytical Chemistry |
| Room No. |
Event Hall |
| Time |
4월 19일 (목요일) 11:00~12:30 |
| Code |
ANAL.P-231 |
| Subject |
Surface Enhanced Raman Scattering of Rhodamine 6G at Electrospun IrO2 Nanofibers Depending on Degree of Reduction |
| Authors |
Ara Jo, Chongmok Lee*, Myung Hwa Kim*
Department of Chemistry and Nano Science, Ewha Womans University, Korea
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| Abstract |
In this study, IrO2 nanofibers (NFs) were fabricated by electrospinning and calcination process. The IrO2 NFs were reduced by H2 atmosphere with various reduction time, resulting IrO2-Ir NFs as products which have diverse fraction of Ir oxide. Progressive reduction of IrO2 to Ir metal was observed until reduction time of 2 h, and the IrO2 NFs and IrO2-Ir NFs were examined for SERS substrates with rhodamine 6G (R6G) as an analyte. The Raman peak intensities of R6G gradually increased with the metallic Ir ratio in IrO2-Ir NFs, demonstrating that the conversion of Ir oxide to Ir metal was accountable for enhanced Raman scattering on IrO2-Ir NFs. This enhancement was considered due to the plasmon frequency shift from infrared to visible region by reduction of Ir oxide to metal. Additionally, bulk Ir did not show Raman signal enhancement, which indicates the nanostructure of IrO2-Ir NFs was responsible for the SERS effect by making a localized surface plasmon on IrO2-Ir NFs. |
| E-mail |
ala0122@naver.com |
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121st General Meeting of the KCS