Lighting Up the Raman Signal of Molecules in the Vicinity of Graphene Related Materials

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• 作者：Xi Ling ; Shengxi Huang ; Shibin Deng ; Nannan Mao ; Jing Kong ; Mildred S. Dresselhaus ; Jin Zhang
• 刊名：Accounts of Chemical Research
• 出版年：2015
• 出版时间：July 21, 2015
• 年：2015
• 卷：48
• 期：7
• 页码：1862-1870
• 全文大小：597K
• ISSN：1520-4898

文摘

Surface enhanced Raman scattering (SERS) is a popular technique to detect the molecules with high selectivity and sensitivity. It has been developed for 40 years, and many reviews have been published to summarize the progress in SERS. Nevertheless, how to make the SERS signals repeatable and quantitative and how to have deeper understanding of the chemical enhancement mechanism are two big challenges. A strategy to target these issues is to develop a Raman enhancement substrate that is flat and nonmetal to replace the conventional rough and metal SERS substrate. At the same time, the newly developed substrate should have a strong interaction with the adsorbate molecules to guarantee strong chemical enhancement. The flatness of the surface allows better control of the molecular distribution and configuration, while the nonmetal surface avoids disturbance of the electromagnetic mechanism.