Tuning Optical Properties of Graphene Oxide under Compressive Strain Using Wet Ball Milling Method
Tuning Optical Properties of Graphene Oxide under Compressive Strain Using Wet Ball Milling Method作者机构：Magnetic Materials and Device Physics Laboratory Department of Physics Indian Institute of Technology Hyderabad Hyderabad-502285 India
出 版 物：《Graphene》 (石墨烯（英文）)
年 卷 期：2016年第5卷第2期
页 面：73-80页
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）]
主 题：Graphene Oxide Band Gap Oxygen Functional Groups Optical Properties
摘 要：We report on the effect of compressive stress on the optical properties of graphene oxide using a wet ball milling technique. For this purpose, graphene oxide was prepared using the modified Hummer’s method and subsequently processed with wet ball milling. X-ray diffraction infers a peak at 9.655° which is the allowed reflection for the graphene oxide. The Williamson-Hall method is used to quantify the strain on the 10 hrs and 20 hrs ball milled graphene oxide samples and is found to be 4.2% and 4.8% respectively. Although we applied strain on the graphene oxide, it actually helped to reduce the defects which are confirmed by the intensity drop-off of D-peak in Raman spectroscopy. Indeed there exists a band gap alteration of 0.14 eV for an applied compressive strain of ~4.8%, hinting that the reduction in oxygen functional groups and the same is confirmed with the Fourier Transform Infrared Spectroscopy (FTIR). The present results would be helpful in developing graphene oxide based flexible memories and optoelectronic devices.
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