Water Transport through Ultrathin Graphene

被引：471

作者：

Suk, Myung E. ^{[1
]}

Aluru, N. R. ^{[1
]}

机构：

[1] Univ Illinois, Beckman Inst Adv Sci & Technol, Dept Mech Sci & Engn, Urbana, IL 61801 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2010年 / 1卷 / 10期

基金：

美国国家科学基金会;

关键词：

CARBON NANOTUBE MEMBRANES; MOLECULAR-DYNAMICS; CHANNEL; SEPARATION; NANOPORES; PORES; SIZE; FLOW;

D O I：

10.1021/jz100240r

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 compare the results with water transport,through thin (less than 10 nm in thickness/length) carbon nanotube (CNT) mernbranes. 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 so forth.

引用

页码：1590 / 1594

页数：5

共 38 条

[1] Single-file transport of water molecules through a carbon nanotube [J].

Berezhkovskii, A ;

Hummer, G .

PHYSICAL REVIEW LETTERS, 2002, 89 (06) :064503/1-064503/4

[2] Macroscopic graphene membranes and their extraordinary stiffness [J].

Booth, Tim J. ;

Blake, Peter ;

Nair, Rahul R. ;

Jiang, Da ;

Hill, Ernie W. ;

Bangert, Ursel ;

Bleloch, Andrew ;

Gass, Mhairi ;

Novoselov, Kostya S. ;

Katsnelson, M. I. ;

Geim, A. K. .

NANO LETTERS, 2008, 8 (08) :2442-2446

[3] Impermeable atomic membranes from graphene sheets [J].

Bunch, J. Scott ;

Verbridge, Scott S. ;

Alden, Jonathan S. ;

van der Zande, Arend M. ;

Parpia, Jeevak M. ;

Craighead, Harold G. ;

McEuen, Paul L. .

NANO LETTERS, 2008, 8 (08) :2458-2462

[4] ELECTRON-PHONON INTERACTIONS AND SUPERCONDUCTIVITY IN K3C60 [J].

CHEN, GH ;

GUO, YJ ;

KARASAWA, N ;

GODDARD, WA .

PHYSICAL REVIEW B, 1993, 48 (18) :13959-13970

[5] Designing carbon nanotube membranes for efficient water desalination [J].

Corry, Ben .

JOURNAL OF PHYSICAL CHEMISTRY B, 2008, 112 (05) :1427-1434

[6] Proton transport through water-filled carbon nanotubes [J].

Dellago, C ;

Naor, MM ;

Hummer, G .

PHYSICAL REVIEW LETTERS, 2003, 90 (10) :4-105902

[7] Electron beam nanosculpting of suspended graphene sheets [J].

Fischbein, Michael D. ;

Drndic, Marija .

APPLIED PHYSICS LETTERS, 2008, 93 (11)

[8] Ion exclusion by sub-2-nm carbon nanotube pores [J].

Fornasiero, Francesco ;

Park, Hyung Gyu ;

Holt, Jason K. ;

Stadermann, Michael ;

Grigoropoulos, Costas P. ;

Noy, Aleksandr ;

Bakajin, Olgica .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2008, 105 (45) :17250-17255

[9] Graphene: Status and Prospects [J].

Geim, A. K. .

SCIENCE, 2009, 324 (5934) :1530-1534

[10] Graphene at the Edge: Stability and Dynamics [J].

Girit, Caglar Oe ;

Meyer, Jannik C. ;

Erni, Rolf ;

Rossell, Marta D. ;

Kisielowski, C. ;

Yang, Li ;

Park, Cheol-Hwan ;

Crommie, M. F. ;

Cohen, Marvin L. ;

Louie, Steven G. ;

Zettl, A. .

SCIENCE, 2009, 323 (5922) :1705-1708

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