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Synthesis of single layer MOS2 array for surface Raman enhancement spectroscopy

机译:用于表面拉曼增强光谱的单层MOS2阵列的合成

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We present direct synthesis of high quality single-layer MoS2 array on substrates with pre-deposited sulfur seeds for the first time with strong Raman signals of diluted Rhodamine 6G (R6G) due to Surface-Enhanced Raman Scattering (SERS). This work has following unprecedented accomplishments: (1) the usages of sulfur terminated substrate for the synthesis of CVD MoS2 array; (2) SERS using the monolayer MoS2 array with partially bowtie structures. (3) First time demonstration of SERS and photoluminescence (PL) on MoS2 covered with Al2O3, which address the possibility of the physical enhancement mechanism. As such, the newly developed processes can enable large scale growth of MoS2 for applications in bio-chemical sensing, and bring great inspiration in the 2D chalcogenide SERS mechanism.
机译:由于表面增强拉曼散射(SERS),我们首次在具有预先沉积的硫籽的基质上直接合成了高质量的单层MoS2阵列,具有稀释的若丹明6G(R6G)的强拉曼信号。这项工作具有以下空前的成就:(1)将硫封端的底物用于CVD MoS2阵列的合成; (2)使用具有部分领结结构的单层MoS2阵列的SERS。 (3)首次在覆盖有Al2O3的MoS2上演示了SERS和光致发光(PL),解决了物理增强机制的可能性。因此,新开发的工艺可以使MoS2大规模生长,以应用于生化传感,并为2D硫族化物SERS机理带来巨大启发。

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