Cited Article: Hummer, G. Water conduction through the hydrophobic channel of a carbon nanotube
Alert Expires: 22 AUG 2011
Number of Citing Articles: 6 new records this week (6 in this e-mail)
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Title:
Forced vibration of an embedded single-walled carbon nanotube traversed by a moving load using nonlocal Timoshenko beam theory
Authors:
Simsek, M
Author Full Names:
Simsek, Mesut
Source:
STEEL AND COMPOSITE STRUCTURES 11 (1): 59-76 FEB 2011
Language:
English
Document Type:
Article
Author Keywords:
vibration; nonlocal Timoshenko beam theory; carbon nanotubes; moving loads
KeyWords Plus:
SHEAR DEFORMATION-THEORY; PRESTRESSED DAMPED BEAM; SMALL LENGTH SCALE; HARMONIC LOAD; WAVE-PROPAGATION; CONTINUUM-MECHANICS; DYNAMIC-ANALYSIS; ELASTICITY THEORY; MICROTUBULES; MODELS
Abstract:
Dynamic analysis of an embedded single-walled carbon nanotube (SWCNT) traversed by a moving nanoparticle, which is modeled as a moving load, is investigated in this study based on the nonlocal Timoshenko beam theory, including transverse shear deformation and rotary inertia. The governing equations and boundary conditions are derived by using the principle of virtual displacement. The Galerkin method and the direct integration method of Newmark are employed to find the dynamic response of the SWCNT. A detailed parametric study is conducted to study the influences of the nonlocal parameter, aspect ratio of the SWCNT, elastic medium constant and the moving load velocity on the dynamic responses of SWCNT. For comparison purpose, free vibration frequencies of the SWCNT are obtained and compared with a previously published study. Good agreement is observed. The results show that the above mentioned effects play an important role on the dynamic behaviour of the SWCNT.
Reprint Address:
Simsek, M, Yildiz Tech Univ, Dept Civil Engn, Davutpasa Campus, TR-34210 Esenler, Turkey.
Research Institution addresses:
Yildiz Tech Univ, Dept Civil Engn, TR-34210 Esenler, Turkey
E-mail Address:
mesutsimsek@gmail.com
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Cited Reference Count:
82
Times Cited:
0
Publisher:
TECHNO-PRESS; PO BOX 33, YUSEONG, DAEJEON 305-600, SOUTH KOREA
Subject Category:
Construction & Building Technology; Engineering, Civil; Materials Science, Composites
ISSN:
1229-9367
IDS Number:
729MH
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Title:
Transition from one-dimensional water to ferroelectric ice within a supramolecular architecture
Authors:
Zhao, HX; Kong, XJ; Li, H; Jin, YC; Long, LS; Zeng, XC; Huang, RB; Zheng, LS
Author Full Names:
Zhao, Hai-Xia; Kong, Xiang-Jian; Li, Hui; Jin, Yi-Chang; Long, La-Sheng; Zeng, Xiao Cheng; Huang, Rong-Bin; Zheng, Lan-Sun
Source:
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 108 (9): 3481-3486 MAR 1 2011
Language:
English
Document Type:
Article
Author Keywords:
ab initio molecular dynamics; phase transition; supramolecular nanochannel
KeyWords Plus:
WALLED CARBON NANOTUBES; NEUTRON-DIFFRACTION; PHASE-TRANSITION; DENSITY; DYNAMICS; CRYSTAL; NANOSCALE; EXISTENCE
Abstract:
Ferroelectric materials are characterized by spontaneous electric polarization that can be reversed by inverting an external electric field. Owing to their unique properties, ferroelectric materials have found broad applications in microelectronics, computers, and transducers. Water molecules are dipolar and thus ferroelectric alignment of water molecules is conceivable when water freezes into special forms of ice. Although the ferroelectric ice XI has been proposed to exist on Uranus, Neptune, or Pluto, evidence of a fully proton-ordered ferroelectric ice is still elusive. To date, existence of ferroelectric ice with partial ferroelectric alignment has been demonstrated only in thin films of ice grown on platinum surfaces or within microdomains of alkali-hydroxide doped ice I. Here we report a unique structure of quasi-one-dimensional (H2O)(12n) wire confined to a 3D supramolecular architecture of [(Cu2CuII)-Cu-I(CDTA)(4,4'-bpy)(2)](n) H(4)CDTA, trans-1,2-diaminocyclohexane-
N,N,N',N'-tetraacetic acid; 4,4'-bpy, 4,4'-bipyridine). In stark contrast to the bulk, this 1D water wire not only exhibits enormous dielectric anomalies at approximately 175 and 277 K, respectively, but also undergoes a spontaneous transition between "1D liquid" and "1D ferroelectric ice" at approximately 277 K. Hitherto unrevealed properties of the 1D water wire will be valuable to the understanding of anomalous properties of water and synthesis of novel ferroelectric materials.
Reprint Address:
Long, LS, Xiamen Univ, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China.
Research Institution addresses:
[Zhao, Hai-Xia; Kong, Xiang-Jian; Jin, Yi-Chang; Long, La-Sheng; Huang, Rong-Bin; Zheng, Lan-Sun] Xiamen Univ, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China; [Zhao, Hai-Xia; Kong, Xiang-Jian; Jin, Yi-Chang; Long, La-Sheng; Huang, Rong-Bin; Zheng, Lan-Sun] Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China; [Li, Hui; Zeng, Xiao Cheng] Univ Nebraska, Dept Chem, Lincoln, NE 68588 USA
E-mail Address:
lslong@xmu.edu.cn; xzeng1@unl.edu
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47
Times Cited:
0
Publisher:
NATL ACAD SCIENCES; 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
Subject Category:
Multidisciplinary Sciences
ISSN:
0027-8424
DOI:
10.1073/pnas.1010310108
IDS Number:
728AD
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Title:
Vibrating carbon nanotubes as water pumps
Authors:
Qiu, H; Shen, R; Guo, WL
Author Full Names:
Qiu, Hu; Shen, Rong; Guo, Wanlin
Source:
NANO RESEARCH 4 (3): 284-289 MAR 2011
Language:
English
Document Type:
Article
Author Keywords:
Nanopump; carbon nanotube; nanofluidics; centrifugal forces; water dynamics
KeyWords Plus:
MOLECULAR-DYNAMICS; TRANSPORT; PERMEATION; DESALINATION; MEMBRANES; CHANNEL
Abstract:
Nanopumps conducting fluids directionally through nanopores and nanochannels have attracted considerable interest for their potential applications in nanofiltration, water purification, and hydroelectric power generation. Here, we demonstrate by molecular dynamics simulations that an excited vibrating carbon nanotube (CNT) cantilever can act as an efficient and simple nanopump. Water molecules inside the vibrating cantilever are driven by centrifugal forces and can undergo a continuous flow from the fixed to free ends of the CNT. Further extensive simulations show that the pumping function holds good not only for a single-file water chain in a narrow (6,6) CNT, but also for bulk-like water columns inside wider CNTs, and that the water flux increases monotonically with increasing diameter of the nanotube.
Reprint Address:
Guo, WL, Nanjing Univ Aeronaut & Astronaut, Inst Nano Sci, Nanjing 210016, Peoples R China.
Research Institution addresses:
[Qiu, Hu; Shen, Rong; Guo, Wanlin] Nanjing Univ Aeronaut & Astronaut, Inst Nano Sci, Nanjing 210016, Peoples R China
E-mail Address:
wlguo@nuaa.edu.cn
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Cited Reference Count:
34
Times Cited:
0
Publisher:
TSINGHUA UNIV PRESS; TSINGHUA UNIV, RM A703, XUEYAN BLDG, BEIJING, 10084, PEOPLES R CHINA
Subject Category:
Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied
ISSN:
1998-0124
DOI:
10.1007/s12274-010-0080-y
IDS Number:
729TR
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Title:
Density Functional Theory Study on the Water Clusters on Graphene Chip
Authors:
Abe, S; Nagoya, Y; Watari, F; Tachikawa, H
Author Full Names:
Abe, Shigeaki; Nagoya, Yoshinori; Watari, Fumio; Tachikawa, Hiroto
Source:
JAPANESE JOURNAL OF APPLIED PHYSICS 50 (1): Art. No. 01BJ02 Part 3 Sp. Iss. SI JAN 2011
Language:
English
Document Type:
Article
KeyWords Plus:
INITIO MOLECULAR-DYNAMICS; CARBON NANOTUBES; DIFFUSION DYNAMICS; AMORPHOUS-CARBON; THYMINE DIMER; SIMULATION; SURFACE; ION; MD
Abstract:
The structures and electronic states of graphene-water interaction systems have been investigated by means of density functional theory (DFT) method to elucidate the effects of water clusters on the electronic states of graphene chip. Solvation caused by five to eight water molecules (n = 5-8) was examined as the interaction systems. A graphene chip composed of 14 benzene rings was used as a model of finite-sized graphene (C42H16). The water clusters interact with the graphene chip with hydrogen bonds. The band gap of graphene was slightly red-shifted by the solvation and the first excitation energy was saturated around n = 5. The electronic states of graphene-water systems were discussed on the basis of theoretical results. (c) 2011 The Japan Society of Applied Physics
Reprint Address:
Abe, S, Hokkaido Univ, Grad Sch Dent Med, Dept Biomed Dent Med & Engn, Sapporo, Hokkaido 0608586, Japan.
Research Institution addresses:
[Abe, Shigeaki; Watari, Fumio] Hokkaido Univ, Grad Sch Dent Med, Dept Biomed Dent Med & Engn, Sapporo, Hokkaido 0608586, Japan; [Nagoya, Yoshinori; Tachikawa, Hiroto] Hokkaido Univ, Grad Sch Engn, Div Mat Chem, Sapporo, Hokkaido 0608628, Japan
E-mail Address:
sabe@den.hokudai.ac.jp
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Cited Reference Count:
19
Times Cited:
0
Publisher:
JAPAN SOC APPLIED PHYSICS; KUDAN-KITA BUILDING 5TH FLOOR, 1-12-3 KUDAN-KITA, CHIYODA-KU, TOKYO, 102-0073, JAPAN
Subject Category:
Physics, Applied
ISSN:
0021-4922
DOI:
10.1143/JJAP.50.01BJ02
IDS Number:
723RG
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*Record 5 of 6.
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Title:
Water and ion transport through functionalised carbon nanotubes: implications for desalination technology
Authors:
Corry, B
Author Full Names:
Corry, Ben
Source:
ENERGY & ENVIRONMENTAL SCIENCE 4 (3): 751-759 MAR 2011
Language:
English
Document Type:
Article
KeyWords Plus:
MOLECULAR-DYNAMICS; MECHANOSENSITIVE CHANNEL; ACETYLCHOLINE-RECEPTOR; MEMBRANES; PERMEATION; PORES; AQUAPORIN-1; SELECTIVITY; CONDUCTION; NANOPORES
Abstract:
The use of semipermeable membranes containing carbon nanotubes (CNTs) that form continuous pores has been suggested as a way to reduce the cost of desalination via reverse osmosis. Example membranes containing aligned CNTs have been fabricated, but obtaining only the very narrow pores that are able to block the passage of ions while allowing a rapid flow of water remains a challenge and previous computational studies have focused on idealised tubes. Here molecular dynamics simulations are used to examine water and ion transport through functionalised CNTs with the aim of investigating whether such chemical modification allows the performance of CNT based membranes to be improved, or for larger diameter pores to be used. A range of different charged and polar functional groups were added to a 1.1 nm diameter (8,8) CNT that was previously found to be only moderately effective at rejecting ions. These CNTs were incorporated into membranes and simulations were conducted with a hy
drostatic pressure difference to determine the ion rejection and flux of water passing through each as well as the energy barriers presented to ions and water molecules. The results show that the addition of charges at the entrance of the pore can help to prevent the passage of ions, however, any functionalisation also reduces the flow of water through the membrane due to increased electrostatic interactions between the water molecules and the CNT. Assuming pore densities that have previously been achieved, the performance of these membranes in the simulations is still many times better than existing technology and thus the inclusion of functionalised CNTs in desalination membranes may prove to be useful in achieving salt rejection and rapid water flow.
Reprint Address:
Corry, B, Univ Western Australia, Sch Biomed Biomol & Chem Sci, Perth, WA 6009, Australia.
Research Institution addresses:
Univ Western Australia, Sch Biomed Biomol & Chem Sci, Perth, WA 6009, Australia
E-mail Address:
ben.corry@uwa.edu.au
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Times Cited:
0
Publisher:
ROYAL SOC CHEMISTRY; THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Subject Category:
Chemistry, Multidisciplinary; Energy & Fuels; Engineering, Chemical; Environmental Sciences
ISSN:
1754-5692
DOI:
10.1039/c0ee00481b
IDS Number:
729CE
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*Record 6 of 6.
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Title:
Behavior of Carbon Nanotube Membranes as Channels of Salt and Water in Forward Osmosis Process
Authors:
Jia, YX; Li, Y; Hu, YD
Author Full Names:
Jia Yu-Xiang; Li Yan; Hu Yang-Dong
Source:
ACTA PHYSICO-CHIMICA SINICA 27 (1): 228-232 JAN 2011
Language:
Chinese
Document Type:
Article
Author Keywords:
Forward osmosis; Membrane separation; Desalination; Carbon nanotube; Molecular dynamics simulation
KeyWords Plus:
HOLLOW-FIBER MEMBRANES; MOLECULAR-DYNAMICS; TRANSPORT; DESALINATION; CONDUCTION; MODELS
Abstract:
We investigated the influence of carbon nanotube (CNT) size using CNTs including CNT(6,6), CNT(7,7), CNT(8,8), CNT(9,9), CNT(10,10), and CNT(11,11), and the influence of draw solution concentrations, such as 2.5, 3.75, and 5.0 mol . L-1, on the permeation behaviors of salt and water molecules through the biomimetically manufactured forward osmosis (FO) membranes. Nanosecond-scale molecular dynamic simulations were carried out to obtain the relevant information, including the distributions of the water molecules, water flux, and salt permeation within the different CNT membranes. Simulation results show that the FO membrane incorporating CNT(8,8) can achieve the highest water flux and also the lowest salt permeation.
Reprint Address:
Jia, YX, Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Shandong Prov, Peoples R China.
Research Institution addresses:
[Jia Yu-Xiang; Li Yan; Hu Yang-Dong] Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Shandong Prov, Peoples R China
E-mail Address:
jiayx76@yahoo.com.cn
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Cited Reference Count:
25
Times Cited:
0
Publisher:
PEKING UNIV PRESS; PEKING UNIV, CHEMISTRY BUILDING, BEIJING 100871, PEOPLES R CHINA
Subject Category:
Chemistry, Physical
ISSN:
1000-6818
IDS Number:
700YN
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