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Published on Web Date: April 30, 2010 r 2010 American Chemical Society 1590 DOI: 10.1021/jz100240r |J. Phys. Chem. Lett. 2010, 1, 15901594
 

Summary: Published on Web Date: April 30, 2010
r 2010 American Chemical Society 1590 DOI: 10.1021/jz100240r |J. Phys. Chem. Lett. 2010, 1, 15901594
pubs.acs.org/JPCL
Water Transport through Ultrathin Graphene
Myung E. Suk and N. R. Aluru*
Department of Mechanical Science and Engineering, Beckman Institute for Advanced Science and Technology, University of
Illinois at Urbana-Champaign, Urbana, Illinois 61801
ABSTRACT Graphene can be considered as an ideal membrane since its thickness
is only one carbon diameter. In this study, using molecular dynamics simulations,
we investigate water transport through a porous graphene membrane and com-
pare the results with water transport through thin (less than 10 nm in thickness/
length) carbon nanotube (CNT) membranes. For smaller diameter pores, where a
single-file water structure is obtained, CNT membranes provide higher water flux
compared to graphene membranes. For larger diameter pores, where the water
structure is not single-file, graphene membranes provide higher water flux
compared to CNT membranes. Furthermore, in thin CNT membranes, the water
flux did not vary significantly with the thickness of the membrane. We explain the
results through a detailed analysis considering pressure distribution, velocity
profiles, and potential of mean force. This work opens up opportunities for
graphene-based membranes in molecular sieving, water filtration, fuel cells, and

  

Source: Aluru, Narayana R. - Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign

 

Collections: Engineering; Materials Science