pH에 의한 골드나노입자의 사이즈 조절과 표면라만증강의 효과
Size control of Au nanoparticles by pH and effect of surface enhanced raman spectroscopy (SERS)
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초록
금 나노 입자의 합성은 폴리바이닐피롤리던(PVP)의 계면 활성제로 아스코르브 산(AC)에 의한 골드 솔트의 환원을 통해 수용액 환경을 만들었다. pH 제어에 의해 4 내지 20 nm의 크기 범위를 갖는 고분 산성 금 입자를 고수율로 제조하였다. 합성된 금 나노 입자의 구조적 및 광학적 특성은 투과 전자 현미경(TEM) 및 UV-vis 분광법에 의해 특성화되었다. 제조된 나노 입자는 효율적인 표면 강화 라만 산란(SERS) 특성을 나타내었고, 이들의 SERS 활성은 크기에 의존한다.
Abstract
Synthesis of gold nanoparticles (NPs) made an aqueous environment via the reduction of HAuCl4 by ascorbicacid (AC) with the surfactant of polyvinylpyrrolidone (PVP). Highly monodisperse gold particles with size ranges from 4to 20 nm were prepared in high-yield by pH control. The synthesized gold nanoparticles were analyzed for structural andoptical properties using transmission electron microscopy (TEM) and UV-vis spectroscopy. In this study, we could revealthat the prepared nanoparticles exhibited efficient surface-enhanced Raman scattering (SERS) properties, and their SERSactivities depends on size.
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