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제122회 대한화학회 학술발표회, 총회 및 기기전시회 안내 The Effect of Electrophilicity of Thiol Molecules in Chemical Interface Damping of Single Triangular Gold Nanoplates

등록일
2018년 8월 22일 13시 43분 13초
접수번호
2607
발표코드
ANAL2.O-9 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 10시 : 00분
발표형식
구두발표
발표분야
Analytical Chemistry - Oral Presentation of Young Analytical Chemists II
저자 및
공동저자
Junho Lee, Ji Won Ha*
Department of Chemistry, University of Ulsan, Korea
Plasmonic nanoparticles have been extensively studied for various applications such as photocatalyst, bio-sensor, orientation probe, photothermal cancer therapy etc. This is because they exhibit unique size and shape dependent optical properties resulted from the localized surface plasmon resonance (LSPR) effect. The LSPR is vibration of free electrons in the conduction band induced by interaction with an electromagnetic field. Recently, two-dimensional (2D) triangular gold nanoplates (AuNPs) are of great interest in many applications such as nanocatalysis and biosensors due to their characteristic LSPR property caused by triangular shape. However, chemical interface damping in single AuNPs at the single particle level has not yet been studied so far. In this study, we characterized the optical properties of single AuNPs and thiolate effect under dark-field (DF) microscopy. The LSPR damping was observed for single thiol-capped AuNPs due to chemical interface damping effect on their surface under single particle scattering spectroscopy. Furthermore, thiol molecules with strong electron withdrawing group (EWG) was compared to strong electron donating group (EDG) on chemical interface damping in single AuNPs. Therefore, we found the potential use of single AuNPs as plasmonic biosensors using this chemical interface damping.

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