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학술지 Preparation and Characterization of Graphene Oxide Encapsulated Gold Nanoparticles
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윤용주, 송기봉
Journal of Nanoscience and Nanotechnology, v.13 no.11, pp.7376-7380
American Scientific Publishers (ASP)
13SE1500, 특이질병 진단 센싱 어레이 셀칩 및 송수신 기술(총괄과제명 : 생체진단 가능 시각/미각 수용체 기반 센싱 기술 개발), 송기봉
We present a simple approach for the fabrication of graphene oxide-encapsulated gold nanoparticles using graphene oxide sheet-wrapping via electrostatic self-assembly. By mixing bovine serum albumin molecule- functionalized gold nanoparticles with graphene oxide dispersion, positively charged bovine serum albumin/gold nanoparticles easily assembled with negatively charged graphene oxide sheets through electrostatic interaction. Transmittance electron microscopy, scanning electron microscopy, atomic force microscopy, and Raman spectroscopy were used to confirm the encapsulation of graphene oxide on gold nanoparticles. Interestingly, graphene oxide sheets wrapping mainly occurs along the main body of single or a few gold nanoparticles. Additionally, by measuring the ultraviolet-visible spectroscopy spectrum, we found that the surface plasmon resonances band of the graphene oxide-encapsulated gold nanoparticles was found to become red-shifted compared to that of pristine gold nanoparticles, whereas similar to that of bovine serum albumin-coated gold nanoparticles. These results indicating that most of graphene oxideencapsulated gold nanoparticles have good monodispersity and spherical shape. These resulting materials may potentially serve as a platform for plasmon resonance electron transfer spectroscopy or a probe for low level biosensing. Copyright © 2013 American Scientific Publishers.
Bovine serum albumin, Gold nanoparticle, Graphene oxide, Graphene oxide encapsulated gold nanoparticle
KSP 제안 키워드
Atomic force microscope(AFM), Electron Transfer, Electrostatic interaction, Functionalized gold nanoparticles, Graphene oxide(GOS), Graphene oxide sheets, Negatively charged, Oxide dispersion, Positively charged, Raman spectroscopy, Scanning electron microscopy(S.E.M.)