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학술지 Collapse-Induced Multimer Formation of Self-Assembled Nanoparticles for Surface Enhanced Raman Scattering
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저자
김주영, 오영택, 이수언, 박준현, 박신, 고영춘, 황준표, 선승원, 유태상, 김승희, 이세기, 정민규, 김봉훈
발행일
202101
출처
Coatings, v.11 no.1, pp.1-8
ISSN
2079-6412
출판사
MDPI
DOI
https://dx.doi.org/10.3390/coatings11010076
협약과제
20PB5300, 이온전도도 1mS/cm 이상 두께 30μm 이하의 고체전해질 막 제조기술 개발, 이영기
초록
Metallic nanoparticle ensemble, with narrow inter-particle distance, is a useful element for diverse optical devices due to highly enhanced electric field intensity at the gap. Self-assembly of block copolymer (BCP) can provide the versatile solution to fabricate precise nanostructures, but this methodology has the intrinsic limitation to realize optically coupled metallic multimer geometry with narrow inter-particle distance. This is because BCP-based nanotemplate possesses a minimum size limit for interparticle distance imposed by its thermodynamic restriction. Herein, we investigate the facile formation of metallic multimer with scalability and area-selectivity through the collapse of self-assembled BCP nanopattern. The capillary-force-induced collapse phenomenon enables a spatial transformation of lateral regular ordering in metallic nanoparticle array and enhances electric field intensity. The fabrication of this metallic nanoparticle ensemble from BCP lithography is successfully utilized for surface enhanced Raman scattering (SERS). The enhancement factor of metal nanoparticle multimer is calculated as ~6.74x 105 at 1000 cm-1, 2.04x106 at 1022 cm-1, and 6.11 x 106 at 1580 cm-1, respectively.
키워드
Block copolymer, Chemically modified graphene, Localized surface plasmon resonance, Self-assembly, Surface enhanced raman scattering
KSP 제안 키워드
Electric field intensity, Enhanced electric field, Force-induced, Localized surface plasmon resonance(LSPR), Minimum size, Optical devices, Raman scattering(SERS), Self-assembled nanoparticles, Surface Enhanced Raman Scattering, Surface plasmon(SP), Thermodynamic restriction
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