Graphite flakes were divided into two equal parts Part A and Part B. Part A was thermally shocked at 800oC under inert atmosphere of argon for two min before exfoliation under sonic tip while Part B was exfoliated as such using acetonitrile (ACN) as exfoliating media in both cases at 15-20oC. The concentration of the graphene as a result of exfoliation and centrifugation at 500 rpm for 45 min in both cases were determined. After ten hours of sonication the concentration of graphene in Part A is >12mg/ml with few layered thickness while that of Part B was <5mg/ml consisting of more layers than Part A. UV spectroscopy, Raman, Transmission Electron Microscopy and Scanning Electron Microscopy (SEM) were used for the study of these nanoflakes.
Khalid Nawaz, Muhammad Ayub, Arshad Hussain, Abdul Qadeer Malik, Muhammad Bilal Khan, Muhammad Bilal Khan Niazi, Muzammil Hussain, Asad Ullah Khan and Noaman Ul-Haq
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