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:
Fluidic delivery of homogeneous solutions through carbon tube bundles
Authors:
Srikar, R; Yarin, AL; Megaridis, CM
Author Full Names:
Srikar, R.; Yarin, A. L.; Megaridis, C. M.
Source:
NANOTECHNOLOGY 20 (27): Art. No. 275706 JUL 8 2009
Language:
English
Document Type:
Article
KeyWords Plus:
POLYMER NANOFIBERS; RHODAMINE-B; NANOTUBES; TRANSPORT; RELEASE; MEMBRANES; DEVICES; FLOW
Abstract:
A wide array of technological applications requires localized high-rate delivery of dissolved compounds (in particular, biological ones), which can be achieved by forcing the solutions or suspensions of such compounds through nano or microtubes and their bundled assemblies. Using a water-soluble compound, the fluorescent dye Rhodamine 610 chloride, frequently used as a model drug release compound, it is shown that deposit buildup on the inner walls of the delivery channels and its adverse consequences pose a severe challenge to implementing pressure-driven long-term fluidic delivery through nano and microcapillaries, even in the case of such homogeneous solutions. Pressure-driven delivery (3-6 bar) of homogeneous dye solutions through macroscopically-long (similar to 1 cm) carbon nano and microtubes with inner diameters in the range 100 nm-1 mu m and their bundled parallel assemblies is studied experimentally and theoretically. It is shown that the flow delivery gradually sh!
ifts from fast convection-dominated (unobstructed) to slow jammed convection, and ultimately to diffusion-limited transport through a porous deposit. The jamming/clogging phenomena appear to be rather generic: they were observed in a wide concentration range for two fluorescent dyes in carbon nano and microtubes, as well as in comparable transparent glass microcapillaries. The aim of the present work is to study the physics of jamming, rather than the chemical reasons for the affinity of dye molecules to the tube walls.
Reprint Address:
Yarin, AL, Univ Illinois, Dept Mech & Ind Engn, Chicago, IL 60607 USA.
Research Institution addresses:
[Srikar, R.; Yarin, A. L.; Megaridis, C. M.] Univ Illinois, Dept Mech & Ind Engn, Chicago, IL 60607 USA; [Yarin, A. L.] Tech Univ Darmstadt, Ctr Smart Interfaces, D-64287 Darmstadt, Germany
E-mail Address:
ayarin@uic.edu
Cited References:
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Cited Reference Count:
28
Times Cited:
0
Publisher:
IOP PUBLISHING LTD; DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
Subject Category:
Engineering, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied
ISSN:
0957-4484
DOI:
10.1088/0957-4484/20/27/275706
IDS Number:
459GN
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Title:
Open-Cage Fullerene-like Graphitic Carbons as Catalysts for Oxidative Dehydrogenation of Isobutane
Authors:
Liang, CD; Xie, H; Schwartz, V; Howe, J; Dai, S; Overbury, SH
Author Full Names:
Liang, Chengdu; Xie, Hong; Schwartz, Viviane; Howe, Jane; Dai, Sheng; Overbury, Steven H.
Source:
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 131 (22): 7735-7741 JUN 10 2009
Language:
English
Document Type:
Article
KeyWords Plus:
ORDERED MESOPOROUS POLYMERS; BLOCK-COPOLYMERS; NANOTUBES; ETHYLBENZENE; TRANSFORMATION; FRAMEWORKS
Abstract:
We report herein a facile synthesis of fullerene-like cages, which can be opened and closed through simple thermal treatments. A glassy carbon with enclosed fullerene-like cages of 2-3 nm was synthesized through a soft-template approach that created open mesopores of 7 nm. The open mesopores provided access to the fullerene-like cages, which were opened and closed through heat treatments in air and inert gas at various temperatures. Catalytic measurements showed that the open cages displayed strikingly higher activity for the oxidative dehydrogenation of isobutane in comparison to the closed ones. We anticipate that this synthesis approach could unravel an avenue for pursuing fundamental understanding of the unique catalytic properties of graphitic carbon nanostructures.
Reprint Address:
Liang, CD, Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
Research Institution addresses:
[Liang, Chengdu; Xie, Hong; Schwartz, Viviane; Dai, Sheng; Overbury, Steven H.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA; [Howe, Jane] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA; [Dai, Sheng; Overbury, Steven H.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA
E-mail Address:
liangcn@ornl.gov; schwartzv@ornl.gov
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Cited Reference Count:
30
Times Cited:
0
Publisher:
AMER CHEMICAL SOC; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Subject Category:
Chemistry, Multidisciplinary
ISSN:
0002-7863
DOI:
10.1021/ja900888p
IDS Number:
460HD
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