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|
| Type |
Poster Presentation |
| Area |
무기화학 |
| Room No. |
포스터발표장 |
| Time |
4월 21일 (금요일) 13:00~14:30 |
| Code |
INOR.P-69 |
| Subject |
Identification of multi-step mechanism of cysteine-induced sulfidation by plasmonic monitoring |
| Authors |
박영찬, 오현철, 송현준*
KAIST 화학과, Korea
|
| Abstract |
Recent advances in dark-field microscopic imaging analysis technique using plasmonic nanoparticles have enabled the monitoring of chemical reactions in a real-time at a single-particle level. Here, we observed interaction between cysteine and silver nanoparticle from adsorption process to the further sulfidation reaction using dark-field microscopy with flow-cell setup for in situ monitoring. We revealed that the overall reaction of cysteine-induced sulfidation is limited by three different mechanisms: (1) diffusion of cysteine from bulk to silver surface, (2) cysteine decomposition (or sulfidation), and (3) inter-diffusion between silver and silver sulfide. Moreover, kinetic parameters such as activation energy and diffusion constant were calculated. Consequently, these findings provide deeper understanding of the reaction mechanism leading to a new synthetic strategy in bulk system. Our result prove that dark-field microscopic imaging analysis technique can analyze not only simple single reaction but also mixed multi-step mechanism. We expect this method could be used to study more complex reactions. |
| E-mail |
young103606@kaist.ac.kr |
|
119th General Meeting of the KCS