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A Kinetic Model for Exfoliation Kinetics of Layered Materials
Author(s) -
Texter John
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201504693
Subject(s) - exfoliation joint , intercalation (chemistry) , diffusion , kinetics , materials science , graphene , bilayer , kinetic energy , nanotechnology , chemistry , thermodynamics , membrane , organic chemistry , physics , biochemistry , quantum mechanics
Exfoliation of two‐dimensional materials is key to obtaining high‐performance properties. We present a simple kinetic model for exfoliation that is readily solved analytically. Random and irreversible sheet separation is postulated in the presence of highly effective stabilizers. This model appears to quantitatively fit graphene exfoliation data, and it illuminates mechanistic aspects of exfoliation. Thicker sheets exfoliate much faster than trilayer and bilayer sheets. Exfoliation follows highly activated diffusion‐controlled intercalation of stabilizer into inter‐sheet galleries. Application to the most concentrated graphene exfoliation data available supports these assumptions and provides insight for practical treatment regimens.