拉曼散射
罗丹明6G
材料科学
基质(水族馆)
拉曼光谱
吸附
纳米技术
分子
检出限
密度泛函理论
薄膜
光电子学
分析化学(期刊)
光学
化学
物理化学
色谱法
计算化学
有机化学
物理
地质学
海洋学
作者
Yuancai Ge,Fei Wang,Ying Yang,Yi Xu,Ye Ying,Yu Cai,Qingwen Zhang,Shengying Cai,Danfeng Jiang,Xiaohu Liu,Bo Liedberg,Jian Mao,Yi Wang
出处
期刊:Small
[Wiley]
日期:2022-03-04
卷期号:18 (15)
被引量:30
标识
DOI:10.1002/smll.202107027
摘要
An atomically thin TaSe2 sample, approximately containing two to three layers of TaSe2 nanosheets with a diameter of 2.5 cm is prepared here for the first time and applied on the detection of various Raman-active molecules. It achieves a limit of detection of 10-10 m for rhodamine 6G molecules. The excellent surface-enhanced Raman scattering (SERS) performance and underlying mechanism of TaSe2 are revealed using spectrum analysis and density functional theory. The large adsorption energy and the abundance of filled electrons close to the Fermi level are found to play important roles in the chemical enhancement mechanism. Moreover, the TaSe2 film enables highly sensitive detection of bilirubin in serum and urine samples, highlighting the potential of using 2D SERS substrates for applications in clinical diagnosis, for example, in the diagnosis of jaundice caused by excess bilirubin in newborn children.
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