Optical properties of nucleobase thin films as studied by attenuated total reflection and surface-enhanced Raman spectroscopy

被引：7

作者：

Kim, MinSuk ^{[1
]}

Ham, Won Kyu ^{[1
]}

Kim, Wonyoung ^{[1
]}

Hwangbo, Chang Kwon ^{[1
]}

Choi, Eun Ha ^{[2
]}

Lee, Geon Joon ^{[2
]}

机构：

[1] Inha Univ, Dept Phys, Incheon 22212, South Korea

[2] Kwangwoon Univ, Dept Elect & Biol Phys, Seoul 01897, South Korea

来源：

OPTICAL MATERIALS | 2018年 / 78卷

基金：

新加坡国家研究基金会;

关键词：

Adenine; Guanine; Thin film; Surface plasmon resonance; Attenuated total reflection; Surface-enhanced Raman scattering; REFRACTIVE-INDEX; DNA; NANOWIRE;

D O I：

10.1016/j.optmat.2018.03.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Optical properties of nucleobase thin films were studied by attenuated total reflection (ATR) and surface enhanced Raman spectroscopy (SERS). Adenine and guanine films were deposited on fused silica and silver at room temperature by thermal evaporation, and the normal dispersion of refractive indices of transparent adenine and guanine films in the visible and near-infrared regions were analyzed. The measured ATR spectra of adenine (guanine) films and numerical simulations by optical transfer matrix formalism demonstrate that the shift of surface plasmon resonance (SPR) wavelength is approximately linearly proportional to the adenine (guanine) film thickness, indicating that SPR can be used for quantitative measurements of biomaterials. The Raman spectra indicated that the adenine (guanine) films can be deposited by thermal evaporation. The adenine (guanine) films on silver exhibited Raman intensity enhancement as compared to those on glass, which was attributed to the SPR effect of silver platform and might play a role as a hot plate for SERS detection of biomaterials. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：531 / 537

页数：7

共 29 条

[1] Admittance matching analysis of perfect absorption in unpatterned thin films [J].