Facile Method for Liquid-exfoliated Graphene Size Prediction by UV-visible Spectroscopy

Zulhelmi, Ismail and Kamal, Yusoh (2016) Facile Method for Liquid-exfoliated Graphene Size Prediction by UV-visible Spectroscopy. In: AIP Conference Proceedings: 2nd International Conference on Functional Materials and Metallurgy (ICoFM 2016) , 28 May 2016 , Penang, Malaysia. pp. 1-5., 1756 (070002). ISSN 0094-243X ISBN 978-0-7354-1414-3

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In this work, an application of UV spectroscopy for facile prediction of liquid –exfoliated graphene size is discussed. Dynamic light scattering method was used to estimate the graphene flake size (<d> whilst UV spectroscopy measurement was carried out for extinction coefficient value (ε) determination. It was found that the value of (ε) decreased gradually as the graphene size was further reduced after intense sonication time (7h). This observation showed the influence of sonication time on electronic structure of graphene. A mathematical equation was derived from log-log graph for correlation between (<d>) and (ε) value. Both values can be expressed in a single equation as (<d> = (3.4 × 10−2) ε1.2).

Item Type: Conference or Workshop Item (Lecture)
Uncontrolled Keywords: UV spectroscopy; graphene
Subjects: T Technology > TP Chemical technology
T Technology > TS Manufactures
Faculty/Division: Faculty of Chemical & Natural Resources Engineering
Faculty of Manufacturing Engineering
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 28 Dec 2016 03:30
Last Modified: 31 Dec 2018 08:40
URI: http://umpir.ump.edu.my/id/eprint/13864
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