Cited Article: Majumder M. Nanoscale hydrodynamics - Enhanced flow in carbon nanotubes
Alert Expires: 18 OCT 2009
Number of Citing Articles: 2 new records this week (2 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Deformation of Carbon Nanotubes by Exposure to Water Vapor
Authors:
Rossi, MP; Gogotsi, Y; Kornev, KG
Author Full Names:
Rossi, Maria Pia; Gogotsi, Yury; Kornev, Konstantin G.
Source:
LANGMUIR 25 (5): 2804-2810 MAR 3 2009
Language:
English
Document Type:
Article
KeyWords Plus:
SCANNING-ELECTRON-MICROSCOPY; DER-WAALS FORCES; CAPILLARY CONDENSATION; KELVIN EQUATION; YOUNGS MODULUS; NANOPIPES; RINGS; FILMS; TRANSPORT; SORBENTS
Abstract:
The condensation of water inside multiwalled carbon nanotubes has been monitored and controlled using environmental scanning electron microscopy. Undersaturated vapor condenses inside nanotubes and forms nanometer-thick water films. Simultaneously, nanotubes deform and decrease their apparent diameter. When the vapor pressure in the chamber approaches the saturation pressure, we observe the formation of menisci and spontaneous buckling of the nanotubes. We derive a criterion of the buckling instability caused by capillary condensation. Remarkably, the buckling criterion appears to be independent of the meniscus shape. Using our experiments and models, we estimated the circumferential Young's modulus of large-diameter carbon nanotubes with disordered wall structure produced by the chemical vapor deposition method (CVD) to be E-theta theta approximate to 13-18 MPa. It appears to be at least 2 orders of magnitude lower than the longitudinal modulus of nanotubes produced by arc !
discharge or catalytic CVD methods. The reported experiments and proposed theory suggest possible applications of "soft" nanotubes as sensors to probe minute concentrations of absorbable gases and vapors.
Reprint Address:
Kornev, KG, Clemson Univ, Sch Mat Sci & Engn, 161 Sirrine Hall, Clemson, SC 29634 USA.
Research Institution addresses:
[Kornev, Konstantin G.] Clemson Univ, Sch Mat Sci & Engn, Clemson, SC 29634 USA; [Rossi, Maria Pia; Gogotsi, Yury] Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA; [Rossi, Maria Pia; Gogotsi, Yury] Drexel Univ, AJ Drexel Nanotechnol Inst, Philadelphia, PA 19104 USA
E-mail Address:
kkornev@clemson.edu
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Cited Reference Count:
60
Times Cited:
0
Publisher:
AMER CHEMICAL SOC; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Subject Category:
Chemistry, Physical
ISSN:
0743-7463
DOI:
10.1021/la802684q
IDS Number:
413CP
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Title:
Maximum Velocity for a Single Water Molecule Entering a Carbon Nanotube
Authors:
Hilder, TA; Hill, JM
Author Full Names:
Hilder, Tamsyn A.; Hill, James M.
Source:
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 9 (2): 1403-1407 Sp. Iss. SI FEB 2009
Language:
English
Document Type:
Proceedings Paper
Author Keywords:
Water; Carbon Nanotube; Suction Energy; Acceptance Condition
KeyWords Plus:
MECHANICS; FLOW
Abstract:
Carbon nanotubes, despite their hydrophobic nature, rapidly fill with water and allow super fast fluid flow through their interior due to the almost frictionless nanotube surface. The question arises as to whether it is possible to maximize the uptake (suction energy) of water and thus generate the highest possible fluid flow. In this paper, we outline the concepts of an acceptance condition and the suction energy and subsequently examine the suction characteristics of a single water molecule entering a carbon nanotube. In particular, we find that for the hydrogen atoms oriented towards the tube end, the radius of the carbon nanotube must be at least 3.464 angstrom (or 0.3464 nm) for acceptance of a water molecule, and that a radius of 3.95 angstrom provides the maximum uptake or suction energy.
Reprint Address:
Hilder, TA, Univ Wollongong, Sch Math & Appl Stat, Nanomech Grp, Wollongong, NSW 2522, Australia.
Research Institution addresses:
[Hilder, Tamsyn A.; Hill, James M.] Univ Wollongong, Sch Math & Appl Stat, Nanomech Grp, Wollongong, NSW 2522, Australia
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Cited Reference Count:
16
Times Cited:
0
Publisher:
AMER SCIENTIFIC PUBLISHERS; 25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USA
Subject Category:
Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter
ISSN:
1533-4880
DOI:
10.1166/jnn.2009.C166
IDS Number:
411MI
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