由於石墨烯卓越的特性使眾人對它的研究不曾停止過，竭盡所能地希望將石墨烯推向商業化的發展。本實驗參考自前人的液態剝離法，其將石墨放入有機溶劑中震盪剝離產生石墨烯，不同的是，我們以酒精與水混合液取代有機溶劑，此方法對環境較友善、毒性較低。並藉由調整酒精與水比例、震盪時間長短、離心速率快慢與原料石墨濃度得到較佳的石墨烯懸浮液體。
　　由拉曼光譜圖可判別樣品為石墨或少層石墨烯，並藉由原子力顯微鏡得到其高度、寬度與樣品的均勻度，再將拉曼圖譜與原子力顯微鏡結果做交互比對。另外，使用紫外光/可見光光譜儀與電導度計去得知分散液吸收度、石墨濃度與電導度。實驗結果得知：震盪時間超過三小時即可得到少層石墨烯；若達六小時，少層石墨烯的比例會更高、均勻度更佳。酒精與水比例則是控制在40%：60%左右，能使懸浮中的石墨烯不易沉積於底部，有較佳的穩定性，可維持數週以上。離心速率在3000 rpm可有效分離尚未剝離的石墨片與少層石墨烯，使樣品有較佳的均勻度；石墨濃度則必須控制在0.2 mg / ml以下，使石墨易於剝離成石墨烯，提高整體懸浮石墨烯之產量。

Graphene dispersions were produced by liquid-phase exfoliation method. Sonication of graphite powder in alcohol solution can yield graphene dispersions which contains numerous few-layers graphene sheets at micrometer scale, and they can be identified by the Raman spectroscopy and atomic force microscope (AFM). Raman spectroscopy analysis revealed two peaks at ~1580cm-1 and 2600~2700cm-1 called G peak and 2D peak, we focus on shape difference of 2D peak that can use to determine the graphene layers. The conductivity and concentration of dispersions is determined by the conductivity meter and visible absorbance via Lambert – Beer’s law (A=abc). It shows the yield of graphene is about 0.63%. In order to examine the stability of the graphene dispersions, the solution was placed for a month and the concentration variation was measured every interval. The experimental parameters are optimized by adjusting alcohol-water mixture proportion, sonication time, graphite mass and centrifugation speed. This study provides a green liquid-phase exfoliation method to prepare few-layers graphene with alcohol-water mixture.

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