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graphene-platelets
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Effect of porosity on buckling and vibrational characteristics of the imperfect GPLRC composite nanoshell
, Article Mechanics Based Design of Structures and Machines ; Volume 49, Issue 6 , 2021 , Pages 811-840 ; 15397734 (ISSN) ; Mohammadi, A ; Safarpour, H ; Ghadiri, M ; Sharif University of Technology
Bellwether Publishing, Ltd
2021
Abstract
Due to rapid development of manufacturing process, composite materials with porosity have attracted commercially notices in advanced engineering applications. For this regard, buckling and vibrational characteristics of a porous composite cylindrical nanoshell reinforced with GPLs is investigated in this paper. The material properties of piece-wise graphene-reinforced composites (GPLRC) are assumed to be graded in the thickness direction of a cylindrical nanoshell and are estimated using a nanomechanical model. The novelty of our work is including the effects of porosity and GPLRC on natural frequency, critical axial load and critical temperature of the GPLRC cylindrical nanoshell. The...
The effect of heat treatment on formation of graphene thin films from graphene oxide nanosheets
, Article Carbon ; Volume 48, Issue 2 , February , 2010 , Pages 509-519 ; 00086223 (ISSN) ; Sharif University of Technology
2010
Abstract
Graphene thin films with very low concentration of oxygen-containing functional groups were produced by reduction of graphene oxide nanosheets (prepared by using a chemical exfoliation) in a reducing environment and using two different heat treatment procedures (called one and two-step heat treatment procedures). The effects of heat treatment procedure and temperature on thickness variation of graphene platelets and also on reduction of the oxygen-containing functional groups of the graphene oxide nanosheets were studied by atomic force microscopy and X-ray photoelectron spectroscopy. While formation of the thin films composed of single-layer graphene nanosheets with minimum thickness of...