abs

학술발표회초록보기

초록문의 abstract@kcsnet.or.kr

결제문의 member@kcsnet.or.kr

현재 가능한 작업은 아래와 같습니다.
  • 09월 20일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제126회 대한화학회 학술발표회 및 총회 Influence of the Preferred Orientation of Pyridine Derivatives with Donor Substituents on Chemical Interface Damping Induced in Silver-Coated Gold Nanorods with Different Shell Thicknesses

등록일
2020년 9월 10일 12시 35분 09초
접수번호
1261
발표코드
ANAL1.O-12 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
화 09시 : 44분
발표형식
구두발표
발표분야
Analytical Chemistry - Oral Presentation of Young Analytical Chemists I
저자 및
공동저자
Kyeong Rim Ryu, Ji Won Ha1,*
Chemistry, University of Ulsan, Korea
1Department of Chemistry, University of Ulsan, Korea
Chemical interface damping (CID) is one of the plasmon decay processes caused by adsorbate molecules in gold nanoparticles. Despite the advances in this field, the effect of pyridine derivatives having a preferred orientation on CID in silver-coated gold nanorods (AuNRs@Ag, core@shell) with different shell thicknesses remains unknown. Herein, dark-field scattering studies using pyridine derivatives with donor substituents as adsorbates in single AuNRs@Ag with two different Ag shell thicknesses are described. Pyridine derivatives having electrondonating groups (EDGs) were adsorbed on single AuNRs@Ag and induced a strong CID through the interaction of nitrogen with the Ag surface. AuNRs@Ag with thick shells showed a considerably enhanced CID effect compared with AuNRs@Ag with thin shells for all pyridine derivatives. Furthermore, pyridine derivatives with EDGs in the para position (4-aminopyridine and 4-dimethylaminopyridine) caused a decrease in the localized surface plasmon resonance (LSPR) linewidth broadening of single AuNRs@Ag compared with unsubstituted pyridine under the same experimental conditions. In contrast to the high inclination of pyridine molecules, pyridine derivatives bearing EDGs adopted a parallel orientation to the Ag surface according to surface-enhanced Raman spectroscopy and dynamic light scattering measurements, which resulted in different surface coverage on the Ag surface and decreased LSPR linewidth broadening. Therefore, this study provides deeper understanding of the effects of pyridine derivatives with donor substituents and Ag shell thickness on CID in single AuNRs@Ag.

상단으로