Facile and reliable determination of multilayer graphene thickness using optical microscopy

John, Benjamin M.; Ngumbi, Paul K.; Ngei, K.; Mugo, Simon W.; Timonah, Nelson S.; Ngaruiya, James M.

dc.contributor.author	John, Benjamin M.
dc.contributor.author	Ngumbi, Paul K.
dc.contributor.author	Ngei, K.
dc.contributor.author	Mugo, Simon W.
dc.contributor.author	Timonah, Nelson S.
dc.contributor.author	Ngaruiya, James M.
dc.date.accessioned	2016-03-21T12:08:16Z
dc.date.available	2016-03-21T12:08:16Z
dc.identifier.citation	Chuka University, 2nd International research Conference, 28th – 30th Oct, 2015
dc.identifier.uri	http://repository.seku.ac.ke/handle/123456789/1996
dc.description.abstract	Optical transmittance of exfoliated multilayer graphene (MLG) was investigated and cross-referenced with a standard monolayer sample. Plots of grayscale values against position on the images were found to have step-like profiles. Step heights were extracted from the profiles and found to have peak points. The peaks occur at approximately 80 layers region. These findings occur due to interlayer interactions within the samples, with the 80 layers being the transition from MLG to the bulk graphite. Our experimental results show optical transmittance of %3.97 , %2.95 %2.93 and %3.91 for single layer, bilayer, trilayer and tetralayer respectively. The observed exponential decrease in transmittance with the number of graphene layers has been attributed to the variations in optical absorption of the incident light by the MLG samples.	en_US
dc.language.iso	en	en_US
dc.subject	Single layer graphene	en_US
dc.subject	Multilayer graphene	en_US
dc.subject	optical microscopy	en_US
dc.subject	transmittance	en_US
dc.subject	image contrast	en_US
dc.title	Facile and reliable determination of multilayer graphene thickness using optical microscopy	en_US
dc.type	Presentation	en_US