【摘 要】
：
According to the atmospheric pressure plasma (APP) technology,we propose a rapid synthetic approach of the sub-strates for enhanced Raman spectroscopy.The plasma is used to modify and etch the surface of silver film,which generates large scale hotspots\
【机 构】
：
Jiangsu Key Laboratory of Power Transmission and Distribution Equipment Technology,Hohai University,
论文部分内容阅读
According to the atmospheric pressure plasma (APP) technology,we propose a rapid synthetic approach of the sub-strates for enhanced Raman spectroscopy.The plasma is used to modify and etch the surface of silver film,which generates large scale hotspots\' aggregation.By switching the discharge polarity and adjusting the film thickness,different surface morphologies are formed due to the oxidation,reactive etch and accumulation of the plasma product in a certain space.Especially under positive corona discharge condition,dense snake-like microstructures are formed by the gradual connec-tion of individual nanoparticles,which are driven by the influence of the electric field on surface diffusion.In addition,the experiments verify that the corresponding enhancement factor (EF) raises at least five orders of magnitude and the treatment time is about 10 min.
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