我們證實覆蓋在金奈米粒子(AuNPs)上的單層石墨烯(single layer graphene,Gr)將會抑制由金奈米粒子所帶來的表面增強拉曼散射
(surfaced-enhanced Raman scattering,SERS)。雖然垂直於石墨烯表面的電場可以很輕易地穿透石墨烯，但是靠近具導電性石墨烯表面且平行於基板表面的電場將會很弱，這樣的結果造成所量測到吸附在石墨烯表面之檢測分子的拉曼訊號將會被抑制。受到遠程電漿氫化處理後的高阻值石墨烯，將允許由金奈米粒子之間電漿耦合所感應的強大電磁場可以穿透過石墨烯，並增強吸附在石墨烯薄膜表面之R6G分子的SERS訊號。
在此篇論文，我們同時也證明了覆蓋在金奈米粒子上的石墨烯，其表面所吸附之R6G分子的SERS訊號強度將隨著石墨烯曝露在遠程氫電漿時間的增加所導致的電阻值提高，而逐漸地變強。

We demonstrate the suppression of gold-nanoparticle induced surface-enhanced Raman scattering (SERS) by single layer graphene(Gr)on gold nanoparticles (AuNPs). Although electric fields perpendicular to Gr surface can easily penetrate through Gr,electric fields near the surface of a conductive Gr and in directions parallel to the substrate surface are weak, resulting in measured SERS signal intensity from molecules adsorbed on the Gr surface to be suppressed. The high resistivity of the Gr after subjecting to remote plasma hydrogenation allows plasmonic coupling induced strong local electromagnetic fields among the gold nanoparticles to penetrate the Gr, and thus enhances the SERS efficiency of R6G molecules adsorbed on the Gr film.
In this thesis, we also report evidences of progressively
increasing SERS signal intensity, due to increasing electrical resistivity of Gr with its exposure time to remote hydrogen plasma,of R6G molecules on Gr covered AuNPs which are deposited on an oxidized silicon chip.

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