钼
罗丹明6G
纤维
材料科学
拉曼光谱
纳米-
无定形固体
化学工程
等离子体
拉曼散射
纳米技术
化学
分子
复合材料
冶金
有机化学
光学
物理
工程类
量子力学
作者
Zhijun Wang,Che Liao,Chi Yang,Xinchun Mao,Huazhou Zhang,Ge He,Fujun Gou,Kun Zhang,Feng Zhao,Zongbiao Ye,Qingyuan Wang
标识
DOI:10.1016/j.jpcs.2022.111207
摘要
Owing to the direct activation of reactant species, plasma has been playing an important role in surface engineering in recently years, especially for production of nano-materials. Herein, molybdenum derived nano-fiber films have been synthesized via thermal plasma method under the irradiation of dense helium plasma. Surface composition of the nano-fiber films can be controlled by following plasma treatment or chemical reaction to produce molybdenum nitrides or molybdenum oxides while the nanofiber structure is retained. When applied as substrates for the Raman detection of Rhodamine 6G molecule (R6G), the Mo nano-fiber film with amorphous MoOx layer on surface showed strong SERS effect, by pushing the detection limit of R6G from 10−4 M to 10−7 M, while those with MoO3 and Mo2N surface compositions only displayed very weak or none SERS effect. These results indicated that the surface composition of the nano-fiber molybdenum films rather than surface structure plays an important role regarding to their SERS performance.
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