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  • 09월 01일 18시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제118회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Controlled Assembly of Nanoparticles for Plasmon Coupling Studies

2016년 8월 28일 14시 11분 59초
PHYS3-1 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 13시 : 20분
물리화학 - Recent Physical Chemistry Studies on Nanomaterials
저자 및
중앙대학교 화학과, Korea
The assembly of noble metal nanoparticles offers an appealing means to control and enhance the plasmonic properties of nanostructures. Despite their great advantages, however, making nanoassemblies in a controlled fashion with high efficiency remains challenging. In this talk, I will present our efforts to assemble nanoparticles into various structures with high yields, including core-satellites, sphere dimers, and sphere-cube dimers.[1–3] The interparticle distance (d) in these assemblies is finely tuned at the molecular level using self-assembled monolayers of alkanedithiol linkers. The controlled interparticle distance and ultrahigh purity of the prepared nanoassemblies allow us to investigate the plasmon coupling between the nanoparticles as a function of the gap distance. We find that the plasmon coupling follows the classical electromagnetic model when the nanoparticles are far apart (d > 1 nm); however, quantum tunneling effects play a significant role in the plasmonic response of nanoassemblies in the subnanometer gap region.[1,2,4] I will also briefly introduce our recent attempts to control the interparticle distance continuously using photooxidative desorption of linkers.[5] At the end of the talk, I will discuss the future direction of our research.

[1] Cha, H.; Yoon, J. H.; Yoon, S. ACS Nano 2014, 8, 8554.
[2] Yoon, J. H.; Lim, J.; Yoon, S. ACS Nano 2012, 6, 7199.
[3] Lee, D.; Yoon, S. J. Phys. Chem. C 2015, 119, 7873.
[4] Yoon, J. H.; Zhou, Y.; Blaber, M. G.; Schatz, G. C.; Yoon, S. J. Phys. Chem. Lett. 2013, 4, 1371.
[5] Jung, H.; Cha, H.; Lee, D.; Yoon, S. ACS Nano 2015, 9, 12292.