Cited Article: Hummer, G. Water conduction through the hydrophobic channel of a carbon nanotube
Alert Expires: 22 AUG 2011
Number of Citing Articles: 7 new records this week (7 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Frictionless Sliding of Single-Stranded DNA in a Carbon Nanotube Pore Observed by Single Molecule Force Spectroscopy
Authors:
Lulevich, V; Kim, S; Grigoropoulos, CP; Noy, A
Author Full Names:
Lulevich, Valentin; Kim, Sangil; Grigoropoulos, Costas P.; Noy, Aleksandr
Source:
NANO LETTERS 11 (3): 1171-1176 MAR 2011
Language:
English
Document Type:
Article
Author Keywords:
Single molecule force spectroscopy; DNA; carbon nanotubes; CNT membrane; nanofluidics; molecular friction
KeyWords Plus:
MICROSCOPY; TRANSPORT; INSERTION; HYBRIDS
Abstract:
Smooth inner pores of carbon nanotubes (CNT) provide a fascinating model for studying biological transport. We used an atomic force microscope to pull a single-stranded DNA oligomer from a carbon nanotube pore. DNA extraction from CNT pores occurs at a nearly constant force, which is drastically different from the elastic profile commonly observed during polymer stretching with atomic force microscopy. We show that a combination of the frictionless nanotube pore walls and an unfavorable DNA solvation energy produces this constant force profiles.
Reprint Address:
Noy, A, UC Merced, Sch Nat Sci, Merced, CA 95343 USA.
Research Institution addresses:
[Noy, Aleksandr] UC Merced, Sch Nat Sci, Merced, CA 95343 USA; [Lulevich, Valentin; Grigoropoulos, Costas P.] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA; [Kim, Sangil] Porifera Inc, Hayward, CA USA; [Lulevich, Valentin; Kim, Sangil; Noy, Aleksandr] Lawrence Berkeley Natl Lab, Mol Foundry, Berkeley, CA USA
E-mail Address:
anoy@ucmerced.edu
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Cited Reference Count:
28
Times Cited:
0
Publisher:
AMER CHEMICAL SOC; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Subject Category:
Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
ISSN:
1530-6984
DOI:
10.1021/nl104116s
IDS Number:
730UY
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Title:
Growth stimulation of gram (Cicer arietinum) plant by water soluble carbon nanotubes
Authors:
Tripathi, S; Sonkar, SK; Sarkar, S
Author Full Names:
Tripathi, Shweta; Sonkar, Sumit Kumar; Sarkar, Sabyasachi
Source:
NANOSCALE 3 (3): 1176-1181 2011
Language:
English
Document Type:
Article
KeyWords Plus:
CELL-MEMBRANES; TRANSLOCATION; TRANSPORTERS; ROOTS; MICE
Abstract:
Water soluble carbon nanotubes (wsCNTs) show enhancement of the growth rate of common gram (Cicer arietinum) plants. Treating plants with up to 6.0 mu g mL(-1) of wsCNT shows an increased growth rate in every part of the plant including the roots, shoots and also in branching. The noticeable difference between the wsCNT treated and controlled gram is the water uptake; in the former it is dramatically enhanced, suggesting better water absorption and retention related to enhanced growth. This work shows that unlike CNTs, wsCNTs are non-toxic to plant cells that conserve water transport in plants.
Reprint Address:
Sarkar, S, Indian Inst Technol, Dept Chem, Kanpur 208016, Uttar Pradesh, India.
Research Institution addresses:
[Tripathi, Shweta; Sonkar, Sumit Kumar; Sarkar, Sabyasachi] Indian Inst Technol, Dept Chem, Kanpur 208016, Uttar Pradesh, India
E-mail Address:
abya@iitk.ac.in
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Cited Reference Count:
28
Times Cited:
0
Publisher:
ROYAL SOC CHEMISTRY; THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Subject Category:
Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied
ISSN:
2040-3364
DOI:
10.1039/c0nr00722f
IDS Number:
732VR
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Title:
Design of a one-way nanovalve based on carbon nanotube junction and C-60
Authors:
Chen, HY; Liu, ZF; Gong, XG; Sun, DY
Author Full Names:
Chen, H. Y.; Liu, Z. F.; Gong, X. G.; Sun, D. Y.
Source:
MICROFLUIDICS AND NANOFLUIDICS 10 (4): 927-933 APR 2011
Language:
English
Document Type:
Article
Author Keywords:
Molecular dynamics simulation; Nanofluid devices; Carbon nanotube junctions
KeyWords Plus:
MOLECULAR-DYNAMICS SIMULATIONS; WATER CHANNEL; FLUID-FLOW; MOTOR; PUMP
Abstract:
We report the conceptual construction of a one-way nanovalve based on a carbon nanotube intramolecular junction and a C-60. Using molecular dynamics simulations, we demonstrate the flow behavior of helium through the nanovalve as controlled by the pressure balance around C-60. The van der Waals interaction between C-60 and carbon nanotube keeps C-60 close to the junction, while the pressure balance around C-60 can juggle it between two adsorption sites, which in turn closes or opens the nanovalve.
Reprint Address:
Sun, DY, E China Normal Univ, Dept Phys, Shanghai 200062, Peoples R China.
Research Institution addresses:
[Chen, H. Y.; Sun, D. Y.] E China Normal Univ, Dept Phys, Shanghai 200062, Peoples R China; [Liu, Z. F.] Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China; [Liu, Z. F.] Chinese Univ Hong Kong, Ctr Sci Modeling & Computat, Shatin, Hong Kong, Peoples R China; [Gong, X. G.] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China
E-mail Address:
dysun@phy.ecnu.edu.cn
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Cited Reference Count:
39
Times Cited:
0
Publisher:
SPRINGER HEIDELBERG; TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY
Subject Category:
Nanoscience & Nanotechnology; Instruments & Instrumentation; Physics, Fluids & Plasmas
ISSN:
1613-4982
DOI:
10.1007/s10404-010-0719-8
IDS Number:
733HU
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Title:
Functional Relationships between Agonist Binding Sites and Coupling Regions of Homomeric Cys-Loop Receptors
Authors:
Andersen, N; Corradi, J; Bartos, M; Sine, SM; Bouzat, C
Author Full Names:
Andersen, Natalia; Corradi, Jeremias; Bartos, Mariana; Sine, Steven M.; Bouzat, Cecilia
Source:
JOURNAL OF NEUROSCIENCE 31 (10): 3662-3669 MAR 9 2011
Language:
English
Document Type:
Article
KeyWords Plus:
NICOTINIC ACETYLCHOLINE-RECEPTOR; GABA(A) RECEPTOR; LIGAND-BINDING; ION-CHANNEL; M2 DOMAIN; RESOLUTION; RESIDUES; DYNAMICS; PRE-M1; WATER
Abstract:
Each subunit in a homopentameric Cys-loop receptor contains a specialized coupling region positioned between the agonist binding domain and the ion conductive channel. To determine the contribution of each coupling region to the stability of the open channel, we constructed a receptor subunit (alpha 7-5-HT3A) with both a disabled coupling region and a reporter mutation that alters unitary conductance, and coexpressed normal and mutant subunits. The resulting receptors show single-channel current amplitudes that are quantized according to the number of reporter mutations per receptor, allowing correlation of the number of intact coupling regions with mean open time. We find that each coupling region contributes an equal increment to the stability of the open channel. However, by altering the numbers and locations of active coupling regions and binding sites, we find that a coupling region in a subunit flanked by inactive binding sites can still stabilize the open channel. We a
lso determine minimal requirements for channel opening regardless of stability and find that channel opening can occur in a receptor with one active coupling region flanked by functional binding sites or with one active binding site flanked by functional coupling regions. The overall findings show that, whereas the agonist binding sites contribute interdependently and asymmetrically to open-channel stability, the coupling regions contribute independently and symmetrically.
Reprint Address:
Sine, SM, Mayo Clin, Coll Med, Receptor Biol Lab, Dept Physiol, Rochester, MN 55905 USA.
Research Institution addresses:
[Sine, Steven M.] Mayo Clin, Coll Med, Receptor Biol Lab, Dept Physiol, Rochester, MN 55905 USA; [Sine, Steven M.] Mayo Clin, Coll Med, Receptor Biol Lab, Dept Biomed Engn, Rochester, MN 55905 USA; [Sine, Steven M.] Mayo Clin, Coll Med, Receptor Biol Lab, Dept Neurol, Rochester, MN 55905 USA; [Andersen, Natalia; Corradi, Jeremias; Bartos, Mariana; Bouzat, Cecilia] Univ Nacl Sur, Inst Invest Bioquim, Consejo Nacl Invest Cient & Tecn, RA-8000 Bahia Blanca, Buenos Aires, Argentina
E-mail Address:
sine@mayo.edu; inbouzat@criba.edu.ar
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30
Times Cited:
0
Publisher:
SOC NEUROSCIENCE; 11 DUPONT CIRCLE, NW, STE 500, WASHINGTON, DC 20036 USA
Subject Category:
Neurosciences
ISSN:
0270-6474
DOI:
10.1523/JNEUROSCI.5940-10.2011
IDS Number:
732CJ
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Title:
C-60-polysulfone nanocomposite membranes: Entropic and enthalpic determinants of C-60 aggregation and its effects on membrane properties
Authors:
Taurozzi, JS; Crock, CA; Tarabara, VV
Author Full Names:
Taurozzi, Julian S.; Crock, Christopher A.; Tarabara, Volodymyr V.
Source:
DESALINATION 269 (1-3): 111-119 MAR 15 2011
Language:
English
Document Type:
Article
Author Keywords:
Polymer nanocomposite; C-60 fullerene; Phase inversion; Polysulfone; Enthalpic and entropic interactions
KeyWords Plus:
AEROSIL COMPOSITE MEMBRANES; CELLULOSE-ACETATE MEMBRANES; CARBON NANOTUBES; PHASE-INVERSION; ESTROGENIC COMPOUNDS; POLYMER COMPOSITES; FUEL-CELLS; SEPARATION; WATER; NANOPARTICLES
Abstract:
The study focuses on the effects of C-60 filler on the phase inversion process and related changes in the morphology and separation properties of cast C-60-polysulfone nanocomposite membranes. The effects of C-60 on the rejection and permeability of the cast membranes are correlated to rheological and demixing properties of the corresponding casting mixtures. The observed differences between C-60-free and nanocomposite membranes are interpreted as resulting from enthalpic and entropic C-60-polysulfone interactions that drive and are mediated by the aggregation of C-60. Only 30 nm and smaller C-60 aggregates are observed in membranes with the smallest (1% C-60/polysulfone by mass) C-60 loading. In contrast, only aggregates larger than 30 nm are found in composites with 5% and 10% C-60 loadings. A correlation between the demixing rate and permeability and a counter-correlation between permeability and rejection are observed for nanocomposite membranes for the entire C-60 loadin
gs range studied. The observed accumulation of the filler at the surface of internal membrane pores is attributed to the expulsion of C60 aggregates to the free surface for an entropic gain. The findings have implications for the design of polymer nanocomposite membranes as well as for the lifecycle analysis of nanomaterial-enabled products. (C) 2010 Elsevier B.V. All rights reserved.
Reprint Address:
Tarabara, VV, Michigan State Univ, Dept Civil & Environm Engn, E Lansing, MI 48824 USA.
Research Institution addresses:
[Taurozzi, Julian S.; Crock, Christopher A.; Tarabara, Volodymyr V.] Michigan State Univ, Dept Civil & Environm Engn, E Lansing, MI 48824 USA
E-mail Address:
tarabara@msu.edu
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Cited Reference Count:
54
Times Cited:
0
Publisher:
ELSEVIER SCIENCE BV; PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Subject Category:
Engineering, Chemical; Water Resources
ISSN:
0011-9164
DOI:
10.1016/j.desal.2010.10.049
IDS Number:
730UO
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Title:
Wetting of Liquid Iron in Carbon Nanotubes and on Graphene Sheets: A Molecular Dynamics Study
Authors:
Gao, YF; Yang, Y; Sun, DY
Author Full Names:
Gao Yu-Feng; Yang Yang; Sun De-Yan
Source:
CHINESE PHYSICS LETTERS 28 (3): Art. No. 036102 MAR 2011
Language:
English
Document Type:
Article
KeyWords Plus:
CONTACT-ANGLE; LINE TENSION; VAPOR INTERFACE; ENERGY; CAPILLARITY; SIMULATION; POTENTIALS; DEPENDENCE; NANOWIRES; SURFACES
Abstract:
Using molecular dynamics simulations, we study the wetting of liquid iron in a carbon nanotube and on a graphene sheet. It is found that the contact angle of a droplet in a carbon nanotube increases linearly with the increase of wall curvature but is independent of the length of the filled liquid. The contact angle for a droplet on a graphene sheet decreases with the increasing droplet size. The line tension of a droplet on a graphene sheet is also obtained. Detailed studies show that liquid iron near the carbon walls exhibits the ordering tendencies in both the normal and tangential directions.
Reprint Address:
Gao, YF, E China Normal Univ, Dept Phys, Shanghai 200062, Peoples R China.
Research Institution addresses:
[Gao Yu-Feng; Yang Yang; Sun De-Yan] E China Normal Univ, Dept Phys, Shanghai 200062, Peoples R China
E-mail Address:
dysun@phy.ecnu.edu.cn
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39
Times Cited:
0
Publisher:
IOP PUBLISHING LTD; DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
Subject Category:
Physics, Multidisciplinary
ISSN:
0256-307X
DOI:
10.1088/0256-307X/28/3/036102
IDS Number:
731PF
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Title:
Separation and Diameter-Sorting of Empty (End-Capped) and Water-Filled (Open) Carbon Nanotubes by Density Gradient Ultracentrifugation
Authors:
Cambre, S; Wenseleers, W
Author Full Names:
Cambre, Sofie; Wenseleers, Wim
Source:
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 50 (12): 2764-2768 2011
Language:
English
Document Type:
Article
Author Keywords:
carbon nanotubes; chirality; luminescence; surfactants; ultracentrifugation
KeyWords Plus:
DIFFERENTIATION; SPECTROSCOPY; SURFACTANTS
Reprint Address:
Wenseleers, W, Univ Antwerp, Dept Phys, Univ Pl 1, B-2610 Antwerp, Belgium.
Research Institution addresses:
[Cambre, Sofie; Wenseleers, Wim] Univ Antwerp, Dept Phys, B-2610 Antwerp, Belgium
E-mail Address:
wim.wenseleers@ua.ac.be
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Cited Reference Count:
31
Times Cited:
0
Publisher:
WILEY-BLACKWELL; COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
Subject Category:
Chemistry, Multidisciplinary
ISSN:
1433-7851
DOI:
10.1002/anie.201007324
IDS Number:
732GQ
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