Concurrently depostied Ag-Au alloyed nanoislands for wide-range plasmon resonance tuning = 동시열증착법 기반 금은 합금 나노섬을 이용한 광대역 플라즈몬공명파장 조율

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Despite relatively recent discovery, vigorous research has been performed to apply localized surface plasmonic resonance (LSPR) in numerous fields of biophotonic applications such as surface enhanced Raman scattering and metal enhanced fluorescence. LSPR refers to electro-magnetic field enhancement of metallic nanoparticles when the wavelength of incident light matches the resonant frequency of the particle’s free electrons. However, naturally existing metals’ intrinsic properties, i.e., material’s permittivity and refractive index, set a limitation upon tuning range of plasmonic resonance wavelength. To overcome such limitation, recent works have reported studies on plasmonic resonance of bimetallic or metal alloy nano-structures. Yet, conventional methods on alloyed plasmonics incorporates e-beam lithography or dip-pen patterning in fabricating alloyed nanostructures, which are economically expensive and time-consuming methods that are not suitable for biophotonic applications. The objective of this research is to propose a novel method for visible range plasmonic resonance wavelength tuning of plasmonic nanostructures. Gold (Au) and silver (Ag) were used to fabrication metal alloy nanostructures for visible range resonance tuning, while solid-state dewetting method was utilized for wafer-level fabrication at a very low cost. Ag-Au alloyed nanoislands presented in this work provides a new insight in wide-range plasmonic resonance wavelengths tuning in the visible region that can potentially be used for numerous biophotonic applications such as SERS, PEF, and plasmonic color filters.
Advisors
Jeong, Ki-Hunresearcher정기훈researcher
Description
한국과학기술원 :바이오및뇌공학과,
Publisher
한국과학기술원
Issue Date
2017
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 바이오및뇌공학과, 2017.2,[viii, 40 p. :]

Keywords

Plasmonics; LSPR tuning; Alloyed Plasmonics; Solid-state Dewetting; Micro/Nano Fabrication; 플라즈모닉; LSPR 파장 조율; 합금 플라즈모닉; 고체상비젖음현상; N/MEMS

URI
http://hdl.handle.net/10203/242990
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=675204&flag=dissertation
Appears in Collection
BiS-Theses_Master(석사논문)
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