ISI Web of Knowledge Alert - Ghosh, S

ISI Web of Knowledge Citation Alert

Cited Article: Ghosh, S. Carbon nanotube flow sensors
Alert Expires: 09 NOV 2010
Number of Citing Articles: 1 new records this week (1 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Vertically Aligned Single-Walled Carbon Nanotubes by Chemical Assembly - Methodology, Properties, and Applications

Authors:
Diao, P; Liu, ZF

Author Full Names:
Diao, Peng; Liu, Zhongfan

Source:
ADVANCED MATERIALS 22 (13): 1430-1449 APR 6 2010

Language:
English

Document Type:
Review

KeyWords Plus:
ELECTRON-TRANSFER KINETICS; SCANNING PROBE MICROSCOPY; FIELD-EMISSION; ELECTROCHEMICAL CHARACTERIZATION; FORCE MICROSCOPY; ROOM-TEMPERATURE; VAPOR-DEPOSITION; GOLD; ARRAYS; MONOLAYERS

Abstract:
Single-walled carbon nanotubes (SWNTs), as one of the most promising one-dimension nanomaterials due to its unique structure, peculiar chemical, mechanical, thermal, and electronic properties, have long been considered as an important building block to construct ordered alignments. Vertically aligned SWNTs (v-SWNTs) have been successfully prepared by using direct growth and chemical assembly strategies. In this review, we focus explicitly on the v-SWNTs fabricated via chemical assembly strategy. We provide the readers with a full and systematic summary covering the advances in all aspects of this area, including various approaches for the preparation of v-SWNTs using chemical assembly techniques, characterization, assembly kinetics, and electrochemical properties of v-SWNTs. We also review the applications of v-SWNTs in electrochemical and bioelectrochemical sensors, photoelectric conversion, and scanning probe microscopy.

Reprint Address:
Liu, ZF, Peking Univ, Coll Chem & Mol Engn, State Key Lab Struct Chem Unstable & Stable Speci, Beijing Natl Lab Mol Sci,Ctr Nanochem, Beijing 100871, Peoples R China.

Research Institution addresses:
[Liu, Zhongfan] Peking Univ, Coll Chem & Mol Engn, State Key Lab Struct Chem Unstable & Stable Speci, Beijing Natl Lab Mol Sci,Ctr Nanochem, Beijing 100871, Peoples R China; [Diao, Peng] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

E-mail Address:
zfliu@pku.edu.cn

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Cited Reference Count:
133

Times Cited:
0

Publisher:
WILEY-V C H VERLAG GMBH; PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY

Subject Category:
Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter

ISSN:
0935-9648

DOI:
10.1002/adma.200903592

IDS Number:
584FY

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ISI Web of Knowledge Alert - Hummer, G

ISI Web of Knowledge Citation Alert

Cited Article: Hummer, G. Water conduction through the hydrophobic channel of a carbon nanotube
Alert Expires: 09 NOV 2010
Number of Citing Articles: 1 new records this week (1 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Iron(III), nickel(II) and cadmium(II) complexes of triazamacrocyclic ligand with pendant nitrile groups 1,4,7-tris(cyanomethyl)-1,4,7-triazacyclononane: Synthesis, structural characteristics and artificial nuclease activity

Authors:
Zhang, Z; Geng, ZR; Kan, XW; Zhao, Q; Li, YZ; Wang, ZL

Author Full Names:
Zhang, Zhong; Geng, Zhi-Rong; Kan, Xian-Wen; Zhao, Qun; Li, Yi-Zhi; Wang, Zhi-Lin

Source:
INORGANICA CHIMICA ACTA 363 (8): 1805-1812 MAY 5 2010

Language:
English

Document Type:
Article

Author Keywords:
1,4,7-Triazacyclononane; Metal complexes; Nitrile; Crystal structure; Nuclease activity

KeyWords Plus:
PHOSPHATE DIESTER HYDROLYSIS; CRYSTAL-STRUCTURES; ARM DERIVATIVES; METAL-COMPLEXES; DNA-BINDING; TRIAZACYCLONONANE DERIVATIVES; TETRAAZAMACROCYCLIC LIGAND; PHOSPHODIESTER HYDROLYSIS; COBALT(III) COMPLEXES; COPPER(II) COMPLEXES

Abstract:
Three novel transition metal complexes with 1,4,7-tris(cyanomethyl)-1,4,7-triazacyclononane (L)were synthesized and structurally characterized. In complex [FeLCl3]center dot 2H(2)O (1), three N-donors from the macrocyclic backbone and three chloride anions complete the coordination polyhedron around Fe(III)and lead to a neutral [FeLCl3] unit. The neutral Fe(III)units of the same chirality are linked through weak interactions into 3D supramolecular network with hexagonal channels. Guest water molecules trapped inside the channel are associated into an unprecedented 1D linear chain. The crystal structures of complexes [NiL(CH3CN)(3)](ClO4)(2) center dot 0.5H(2)O (2)and [CdL(CH3CN)(3)](ClO4)(2)center dot 0.5H(2)O (3)reveal that the metal center lies in a distorted octahedral N6 environment with three acetonitrile occupying the remaining coordination sites opposite to the macrocyclic ring. The artificial nuclease activity of redox-active complex 1 towards pMD-AMT plasmid DNA was!
assessed by gel electrophoresis. As a result, complex 1 can effectively cleave supercoiled DNA under near physiological conditions with/without H2O2 in a time-and complex concentration-dependent manner. (C) 2010 Elsevier B.V. All rights reserved.

Reprint Address:
Wang, ZL, Nanjing Univ, Sch Chem & Chem Engn, State Key Lab Coordinat Chem, Nanjing 210093, Peoples R China.

Research Institution addresses:
[Zhang, Zhong; Geng, Zhi-Rong; Kan, Xian-Wen; Zhao, Qun; Li, Yi-Zhi; Wang, Zhi-Lin] Nanjing Univ, Sch Chem & Chem Engn, State Key Lab Coordinat Chem, Nanjing 210093, Peoples R China

E-mail Address:
zzkltl@163.com

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Cited Reference Count:
46

Times Cited:
0

Publisher:
ELSEVIER SCIENCE SA; PO BOX 564, 1001 LAUSANNE, SWITZERLAND

Subject Category:
Chemistry, Inorganic & Nuclear

ISSN:
0020-1693

DOI:
10.1016/j.ica.2010.02.024

IDS Number:
585IK

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ISI Web of Knowledge Alert - Ghosh, S

ISI Web of Knowledge Citation Alert

Cited Article: Ghosh, S. Carbon nanotube flow sensors
Alert Expires: 09 NOV 2010
Number of Citing Articles: 1 new records this week (1 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Integrated SWCNT sensors in micro-wind tunnel for air-flow shear-stress measurement

Authors:
Chow, WWY; Qu, YL; Li, WJ; Tung, SCH

Author Full Names:
Chow, Winnie W. Y.; Qu, Yanli; Li, Wen J.; Tung, Steve C. H.

Source:
MICROFLUIDICS AND NANOFLUIDICS 8 (5): 631-640 MAY 2010

Language:
English

Document Type:
Article

Author Keywords:
Carbon nanotubes; CNT sensors; Micro-flow sensor; Micro shear-stress sensor

Abstract:
We have developed SWCNT sensors for air-flow shear-stress measurement inside a polymethylmethacrylate (PMMA) "micro-wind tunnel" chip. An array of sensors is fabricated by using dielectrophoretic (DEP) technique to manipulate bundled single-walled carbon nanotubes (SWCNTs) across the gold microelectrodes on a PMMA substrate. The sensors are then integrated in a PMMA micro-wind tunnel, which is fabricated by SU-8 molding/hot-embossing technique. Since the sensors detect air flow by thermal transfer principle, we have first examined the I-V characteristics of the sensors and confirmed that self-heating effect occurs when the input voltage is above similar to 1 V. We then performed the flow sensing experiment on the sensors using constant temperature (CT) configuration with input power of similar to 230 mu W. The voltage output of the sensors increases with the increasing flow rate in the micro-wind tunnel and the detectable volumetric flow is in the order of 1 x 10(-5)m(3)/s. !
We also found that the activation power of the sensors has a linear relation with 1/3 exponential power of the shear stress which is similar to conventional hot-wire and polysilicon types of convection-based shear-stress sensors. Moreover, measurements of sensors with different overheat ratios were compared, and results showed that sensor is more sensitive to the flow with a higher overheat ratio.

Reprint Address:
Li, WJ, Chinese Univ Hong Kong, Ctr Micro & Nano Syst, William MW Mong Engn Bldg, Shatin, Hong Kong, Peoples R China.

Research Institution addresses:
[Chow, Winnie W. Y.; Li, Wen J.] Chinese Univ Hong Kong, Ctr Micro & Nano Syst, Shatin, Hong Kong, Peoples R China; [Qu, Yanli; Li, Wen J.; Tung, Steve C. H.] Chinese Acad Sci, State Key Lab Robot, Shenyang Inst Automat, Shenyang, Peoples R China; [Tung, Steve C. H.] Univ Arkansas, Dept Mech Engn, Fayetteville, AR 72701 USA

E-mail Address:
wen@mae.cuhk.edu.hk

Cited References:
CHOW WWY, 2008, P 3 IEEE INT C NAN M, P1011.
FUNG CKM, 2005, P IEEE SENS 2005, P541.
FUNG CKM, 2005, PROC IEEE MICR ELECT, P251.
FUNG CMKM, 2004, IEEE T NANOTECHNOL, V3, P395, DOI 10.1109/TNANO.2004.834156.
GHOSH S, 2003, SCIENCE, V299, P1042, DOI 10.1126/science.1079080.
GOLDBERG HD, 1994, SOL STAT SENS ACT WO, P111.
HANRATTY TJ, 1996, FLUID MECH MEASUREME.
KOCH M, 2000, MICROFLUIDIC TECHNOL.
KONG J, 2000, SCIENCE, V287, P622.
LEI KF, 2005, MICROSYST TECHNOL, V11, P353, DOI 10.1007/s00542-004-0454-8.
LIAO KJ, 2003, MICROFAB TECHNOL, V4, P57.
LIU C, 1999, J MICROELECTROMECH S, V8, P90.
NAUGHTON JW, 2002, PROG AEROSP SCI, V38, P515.
NI CN, 2007, P MAT RES SOC S, V263.
ONG KG, 2002, IEEE SENS J, V2, P82.
PADMANABHAN A, 1997, IEEE P TRANSDUCERS 9, P137.
QU YL, 2008, IEEE T NANOTECHNOL, V7, P565, DOI 10.1109/TNANO.2008.928572.
SCHMIDT MA, 1988, IEEE T ELECTRON DEV, V35, P750.
SHEPLAK M, 2004, 20042606 AIAA.
SINHA N, 2006, J NANOSCI NANOTECHNO, V6, P573, DOI 10.1166/jnn.2006.121.
WONG TS, 2003, P IEEE MEMS, P41.
XU Y, 2004, PROC IEEE MICR ELECT, P833.
XU Y, 2005, J MICROELECTROMECH S, V14, P1023, DOI 10.1109/JMEMS.2005.856644.

Cited Reference Count:
23

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/s10404-009-0495-5

IDS Number:
580TW

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ISI Web of Knowledge Alert - Hummer, G

ISI Web of Knowledge Citation Alert

Cited Article: Hummer, G. Water conduction through the hydrophobic channel of a carbon nanotube
Alert Expires: 09 NOV 2010
Number of Citing Articles: 1 new records this week (1 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Towards mimicking natural protein channels with aligned carbon nanotube membranes for active drug delivery

Authors:
Majumder, M; Stinchcomb, A; Hinds, BJ

Author Full Names:
Majumder, Mainak; Stinchcomb, Audra; Hinds, Bruce J.

Source:
LIFE SCIENCES 86 (15-16): 563-568 APR 10 2010

Language:
English

Document Type:
Review

Author Keywords:
Drug delivery; Biomimetic; Nanostructure; Gatekeeper; Membrane; Transdermal; Nanoporous

KeyWords Plus:
WATER; TRANSPORT; POLYSTYRENE; GROWTH; FLOW

Abstract:
Aims: Carbon nanotube (CNT) membranes offer an exciting opportunity to mimic natural protein channels due to 1) a mechanism of dramatically enhanced fluid flow 2) ability to place 'gatekeeper' chemistry at the entrance to pores 3) the ability for biochemical reactions to occur on gatekeeper molecules and 4) an ability to chemically functionalize each side of the membrane independently.
Main methods: Aligned CNT membranes were fabricated and CNT pore entrances modified with gatekeeper chemistry. Pressure driven fluid flow and diffusion experiments were performed to study the mechanisms of transport through CNTs.
Key findings: The transport mechanism through CNT membranes is primarily 1) ionic diffusion near bulk expectation 2) gas flow enhanced 1-2 orders of magnitude primarily due to specular reflection 3) fluid flow 4-5 orders of magnitude faster than conventional materials due to a nearly ideal slip-boundary interface. The transport can be modulated by 'gatekeeper' chemistry at the pore entrance using steric hindrance, electrostatic attraction/repulsion, or biochemical state. The conformation of charged tethered molecules can be modulated by applied bias setting the stage for programmable drug release devices.
Significance: The membrane structure is mechanically far more robust than lipid bilayer films, allowing for large-scale chemical separations, delivery or sensing based on the principles of protein channels. The performance of protein channels is several orders of magnitude faster than conventional membrane materials. The fundamental requirements of mimicking protein channels are present in the CNT membrane system. Crown Copyright (C) 2009 Published by Elsevier Inc. All rights reserved.

Reprint Address:
Hinds, BJ, Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40502 USA.

Research Institution addresses:
[Majumder, Mainak; Hinds, Bruce J.] Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40502 USA; [Stinchcomb, Audra] Univ Kentucky, Coll Pharm, Lexington, KY 40502 USA

E-mail Address:
bjhinds@engr.uky.edu

Cited References:
ANDREWS R, 1999, CHEM PHYS LETT, V303, P467.
BAHR JL, 2001, CHEM MATER, V13, P3823.
CHOPRA N, 2005, ADV FUNCT MATER, V15, P858, DOI 10.1002/adfm.200400399.
HILLE B, 1984, IONIC CHANNELS EXCIT.
HINDS BJ, 2004, SCIENCE, V303, P62, DOI 10.1126/science.1092048.
HOLT JK, 2006, SCIENCE, V312, P1034, DOI 10.1126/science.1126298.
HOLT JK, 2006, SCIENCE, V312, P1034, DOI 10.1126/science.1126298.
HUANG SM, 2002, J PHYS CHEM B, V106, P3543.
HUMMER G, 2001, NATURE, V414, P188.
JIRAGE KB, 1997, SCIENCE, V278, P655.
JOSEPH S, 2008, NANO LETT, V8, P452, DOI 10.1021/nl072385q.
LAUGA E, 2005, HDB EXPT FLUID DYNAM.
LEE SB, 2002, SCIENCE, V296, P2198.
MAJUMDER M, 2005, J AM CHEM SOC, V127, P9062, DOI 10.1021/ja043013b.
MAJUMDER M, 2005, NATURE, V438, P44, DOI 10.1038/43844a.
MAJUMDER M, 2007, LANGMUIR, V23, P8624, DOI 10.1021/la700686k.
MAJUMDER M, 2008, J MEMBRANE SCI, V316, P89, DOI 10.1016/j.memsci.2007.09.068.
MAO ZG, 2001, J PHYS CHEM B, V105, P6916, DOI 10.1021/jp0103272.
MERKULOV VI, 2002, APPL PHYS LETT, V80, P4816.
MITCHELL CA, 2002, MACROMOLECULES, V35, P8825, DOI 10.1021/ma020890y.
MULDER M, 1994, BASIC PRINCIPLES MEM.
MURATA K, 2000, NATURE, V407, P599.
NEDNOOR P, 2005, CHEM MATER, V17, P3595, DOI 10.1021/cm047844s.
NEDNOOR P, 2007, J MATER CHEM, V17, P1755, DOI 10.1039/b703365f.
OHBA T, 2005, NANO LETT, V5, P227, DOI 10.1021/nl048327b.
QIAN D, 2000, APPL PHYS LETT, V76, P2868.
REN ZF, 1998, SCIENCE, V282, P1105.
SINNOTT SB, 1999, CHEM PHYS LETT, V315, P25.
SKOULIDAS AL, 2002, PHYS REV LETT, V89.
SOKHAN VP, 2002, J CHEM PHYS, V117, P8531, DOI 10.1063/1.1512643.
STEINLE ED, 2002, ANAL CHEM, V74, P2416.
WONG SS, 1998, J AM CHEM SOC, V120, P8557.
ZHANG ZJ, 2000, APPL PHYS LETT, V77, P3764.

Cited Reference Count:
33

Times Cited:
1

Publisher:
PERGAMON-ELSEVIER SCIENCE LTD; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND

Subject Category:
Medicine, Research & Experimental; Pharmacology & Pharmacy

ISSN:
0024-3205

DOI:
10.1016/j.lfs.2009.04.006

IDS Number:
581UY

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ISI Web of Knowledge Alert - Thompson, P

ISI Web of Knowledge Citation Alert

Cited Article: Thompson, P. A general boundary condition for liquid flow at solid surfaces
Alert Expires: 09 NOV 2010
Number of Citing Articles: 1 new records this week (1 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
========================================================================
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Title:
A numerical simulation for mass transfer through the porous membrane of parallel straight channels

Authors:
Lu, JF; Lu, WQ

Author Full Names:
Lu, Junfeng; Lu, Wen-Qiang

Source:
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 53 (11-12): 2404-2413 MAY 2010

Language:
English

Document Type:
Article

Author Keywords:
Porous plate channel; Porous membrane; Ultra-filtration; Hemodialysis; Reverse osmosis

KeyWords Plus:
FLOW; PERMEABILITY; COEFFICIENT; LIQUID; WALLS; PORES; MODEL

Abstract:
In this paper, by adopting a "half-channel" model, a mass exchange process (presented in the therapy of hemodialysis) between two opposite running flows is numerically simulated. The flows are confined inside channels and separated by intercalary porous membranes. In the simulation, two types of flows, channel flow and ultra-filtration flow, are physically described, respectively, by Navier-Stokes equations and Kedem-Katchalsky (K-K) equations. By further adopting "SimpleR" algorithm, the velocity fields inside the channels are determined, meanwhile, solute mass distributions are predicted by concentration equation. The solid computation in this paper perfectly explored the process of hemodialysis, its results: (1) displayed the flow and solute distribution patterns inside channels; (2) described the ultra-filtration profiles along the surface of the porous membrane; and (3) disclosed an existent nano-scale reverse osmosis problem. (C) 2010 Elsevier Ltd. All rights reserved.

Reprint Address:
Lu, WQ, Chinese Acad Sci, Grad Univ, 19A Yuquanlu, Beijing 100049, Peoples R China.

Research Institution addresses:
[Lu, Wen-Qiang] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China; [Lu, Junfeng] Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100190, Peoples R China

E-mail Address:
junfenglu@mail.ipc.ac.cn; luwq@gucas.ac.cn

Cited References:
ANDERSON JL, 1974, BIOPHYS J, V14, P957.
ANDERSON JL, 1981, J THEOR BIOL, V90, P405.
BAURMEISTER U, 1989, ASAIO T, V35, P519.
BRADY JP, 1996, BIOPHYS J, V71, P3430.
CHU Y, 2009, ASME 2009 SUMM HEAT.
CHU Y, 2009, P 6 INT S MULT FLOW.
CRANK J, 1975, MATH DIFFUSION.
DAMAK K, 2004, DESALINATION, V161, P67.
DING WP, 2003, CHIN SCI B CHINESE V, V48, P1642.
GEE ML, 1990, J CHEM PHYS, V93, P1895.
GHOSAL S, 2002, TECHN P 2002 INT C M, V1, P68.
HUANG ZP, 2003, THESIS U KENTUCKY LE.
KEDEM O, 1958, BIOCHIM BIOPHYS ACTA, V27, P229.
KEDEM O, 1961, J GEN PHYSIOL, V45, P143.
LIAO ZJ, 2002, THESIS U KENTUCKY.
LU JF, 2009, ASME 2009 2 MICR NAN.
MARUCCI M, 2007, J PHYS D APPL PHYS, V40, P2870, DOI 10.1088/0022-3727/40/9/031.
MINESHIMA M, 2005, HEMODIAL INT, V9, P75.
PANICHI V, 1998, NEPHROL DIAL TRANSPL, V13, P1737.
PATANKAR SV, 1981, NUMER HEAT TRANSFER, V4, P409.
POH C, 2006, ENCY BIOMATERIALS BI, DOI 10.1081/E-EBBE-120007344.
QIAO R, 2002, TECHN P 2002 INT C M, V1, P28.
QIU YR, 2005, T NONFERR METAL SOC, V15, P686.
TEHVER R, 1998, PHYS REV E, V57, R17.
THOMPSON PA, 1997, NATURE, V389, P360.
TRAVIS KP, 2000, J CHEM PHYS, V112, P1984.
VERMA PD, 1973, INDIAN J PHYS, V47, P718.
ZIARANI AS, 2005, MICROFLUID NANOFLUID, V2, P12, DOI 10.1007/S10404-005-0036-9.

Cited Reference Count:
28

Times Cited:
0

Publisher:
PERGAMON-ELSEVIER SCIENCE LTD; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND

Subject Category:
Thermodynamics; Engineering, Mechanical; Mechanics

ISSN:
0017-9310

DOI:
10.1016/j.ijheatmasstransfer.2010.01.043

IDS Number:
580EA

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or 734-459-8565.

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ISI Web of Knowledge Alert - Majumder M

ISI Web of Knowledge Citation Alert

Cited Article: Majumder M. Nanoscale hydrodynamics - Enhanced flow in carbon nanotubes
Alert Expires: 09 NOV 2010
Number of Citing Articles: 2 new records this week (2 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
========================================================================
Note: Instructions on how to purchase the full text of an article and Help Desk Contact information are at the end of the e-mail.
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*Record 1 of 2.
*View Full Record: http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS&DestLinkType=FullRecord;KeyUT=000276551500002
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Title:
Towards mimicking natural protein channels with aligned carbon nanotube membranes for active drug delivery

Authors:
Majumder, M; Stinchcomb, A; Hinds, BJ

Author Full Names:
Majumder, Mainak; Stinchcomb, Audra; Hinds, Bruce J.

Source:
LIFE SCIENCES 86 (15-16): 563-568 APR 10 2010

Language:
English

Document Type:
Review

Author Keywords:
Drug delivery; Biomimetic; Nanostructure; Gatekeeper; Membrane; Transdermal; Nanoporous

KeyWords Plus:
WATER; TRANSPORT; POLYSTYRENE; GROWTH; FLOW

Abstract:
Aims: Carbon nanotube (CNT) membranes offer an exciting opportunity to mimic natural protein channels due to 1) a mechanism of dramatically enhanced fluid flow 2) ability to place 'gatekeeper' chemistry at the entrance to pores 3) the ability for biochemical reactions to occur on gatekeeper molecules and 4) an ability to chemically functionalize each side of the membrane independently.
Main methods: Aligned CNT membranes were fabricated and CNT pore entrances modified with gatekeeper chemistry. Pressure driven fluid flow and diffusion experiments were performed to study the mechanisms of transport through CNTs.
Key findings: The transport mechanism through CNT membranes is primarily 1) ionic diffusion near bulk expectation 2) gas flow enhanced 1-2 orders of magnitude primarily due to specular reflection 3) fluid flow 4-5 orders of magnitude faster than conventional materials due to a nearly ideal slip-boundary interface. The transport can be modulated by 'gatekeeper' chemistry at the pore entrance using steric hindrance, electrostatic attraction/repulsion, or biochemical state. The conformation of charged tethered molecules can be modulated by applied bias setting the stage for programmable drug release devices.
Significance: The membrane structure is mechanically far more robust than lipid bilayer films, allowing for large-scale chemical separations, delivery or sensing based on the principles of protein channels. The performance of protein channels is several orders of magnitude faster than conventional membrane materials. The fundamental requirements of mimicking protein channels are present in the CNT membrane system. Crown Copyright (C) 2009 Published by Elsevier Inc. All rights reserved.

Reprint Address:
Hinds, BJ, Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40502 USA.

Research Institution addresses:
[Majumder, Mainak; Hinds, Bruce J.] Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40502 USA; [Stinchcomb, Audra] Univ Kentucky, Coll Pharm, Lexington, KY 40502 USA

E-mail Address:
bjhinds@engr.uky.edu

Cited References:
ANDREWS R, 1999, CHEM PHYS LETT, V303, P467.
BAHR JL, 2001, CHEM MATER, V13, P3823.
CHOPRA N, 2005, ADV FUNCT MATER, V15, P858, DOI 10.1002/adfm.200400399.
HILLE B, 1984, IONIC CHANNELS EXCIT.
HINDS BJ, 2004, SCIENCE, V303, P62, DOI 10.1126/science.1092048.
HOLT JK, 2006, SCIENCE, V312, P1034, DOI 10.1126/science.1126298.
HOLT JK, 2006, SCIENCE, V312, P1034, DOI 10.1126/science.1126298.
HUANG SM, 2002, J PHYS CHEM B, V106, P3543.
HUMMER G, 2001, NATURE, V414, P188.
JIRAGE KB, 1997, SCIENCE, V278, P655.
JOSEPH S, 2008, NANO LETT, V8, P452, DOI 10.1021/nl072385q.
LAUGA E, 2005, HDB EXPT FLUID DYNAM.
LEE SB, 2002, SCIENCE, V296, P2198.
MAJUMDER M, 2005, J AM CHEM SOC, V127, P9062, DOI 10.1021/ja043013b.
MAJUMDER M, 2005, NATURE, V438, P44, DOI 10.1038/43844a.
MAJUMDER M, 2007, LANGMUIR, V23, P8624, DOI 10.1021/la700686k.
MAJUMDER M, 2008, J MEMBRANE SCI, V316, P89, DOI 10.1016/j.memsci.2007.09.068.
MAO ZG, 2001, J PHYS CHEM B, V105, P6916, DOI 10.1021/jp0103272.
MERKULOV VI, 2002, APPL PHYS LETT, V80, P4816.
MITCHELL CA, 2002, MACROMOLECULES, V35, P8825, DOI 10.1021/ma020890y.
MULDER M, 1994, BASIC PRINCIPLES MEM.
MURATA K, 2000, NATURE, V407, P599.
NEDNOOR P, 2005, CHEM MATER, V17, P3595, DOI 10.1021/cm047844s.
NEDNOOR P, 2007, J MATER CHEM, V17, P1755, DOI 10.1039/b703365f.
OHBA T, 2005, NANO LETT, V5, P227, DOI 10.1021/nl048327b.
QIAN D, 2000, APPL PHYS LETT, V76, P2868.
REN ZF, 1998, SCIENCE, V282, P1105.
SINNOTT SB, 1999, CHEM PHYS LETT, V315, P25.
SKOULIDAS AL, 2002, PHYS REV LETT, V89.
SOKHAN VP, 2002, J CHEM PHYS, V117, P8531, DOI 10.1063/1.1512643.
STEINLE ED, 2002, ANAL CHEM, V74, P2416.
WONG SS, 1998, J AM CHEM SOC, V120, P8557.
ZHANG ZJ, 2000, APPL PHYS LETT, V77, P3764.

Cited Reference Count:
33

Times Cited:
1

Publisher:
PERGAMON-ELSEVIER SCIENCE LTD; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND

Subject Category:
Medicine, Research & Experimental; Pharmacology & Pharmacy

ISSN:
0024-3205

DOI:
10.1016/j.lfs.2009.04.006

IDS Number:
581UY

========================================================================

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Title:
Carbon nanotubes: Solid-phase extraction

Authors:
Ravelo-Perez, LM; Herrera-Herrera, AV; Hernandez-Borges, J; Rodriguez-Delgado, MA

Author Full Names:
Ravelo-Perez, Lidia M.; Herrera-Herrera, Antonio V.; Hernandez-Borges, Javier; Angel Rodriguez-Delgado, Miguel

Source:
JOURNAL OF CHROMATOGRAPHY A 1217 (16): 2618-2641 APR 16 2010

Language:
English

Document Type:
Review

Author Keywords:
Carbon nanotubes; Solid-phase extraction; Applications; Review

KeyWords Plus:
PERFORMANCE LIQUID-CHROMATOGRAPHY; ENVIRONMENTAL WATER SAMPLES; ATOMIC-ABSORPTION-SPECTROMETRY; DESORPTION/IONIZATION MASS-SPECTROMETRY; POLYBROMINATED DIPHENYL ETHERS; ELECTRON-CAPTURE DETECTION; RARE-EARTH-ELEMENTS; HEAVY-METAL IONS; GAS-CHROMATOGRAPHY; SENSITIVE DETERMINATION

Abstract:
Since the first report in 1991, carbon nanotubes (CNTs) have shown great possibilities for a wide variety of processes and applications, which include their use as electrodes, sensors (gas, enzymatic, etc.), nanoprobes, electronic materials, field emitters, etc. The combination of structures, dimensions and topologies has provided physical and chemical attractive properties that are unparalleled by most known materials. Their applications have also reached the Analytical Chemistry field in which CNTs are being used as matrices in matrix assisted laser desorption ionization, stationary phases in either gas chromatography, high performance liquid chromatography or capillary electrochromatography, also as pseudostationary phases in capillary electrophoresis, etc. as well as new solid-phase extraction (SPE) materials. Concerning this last application the number of works has considerably increased in the last five years. This review article pretends to focus on the most important!
features and different applications of SPE using CNTs (including matrix solid-phase dispersion and solid-phase microextraction) covering articles published since their introduction up to now (September 2009). (C) 2009 Elsevier B.V. All rights reserved.

Reprint Address:
Hernandez-Borges, J, Univ La Laguna, Dept Quim Analit Nutr & Bromatol, Fac Quim, Ave Astrofis Francisco Sanchez S-N, E-38206 Tenerife, Spain.

Research Institution addresses:
[Ravelo-Perez, Lidia M.; Herrera-Herrera, Antonio V.; Hernandez-Borges, Javier; Angel Rodriguez-Delgado, Miguel] Univ La Laguna, Dept Quim Analit Nutr & Bromatol, Fac Quim, E-38206 Tenerife, Spain

E-mail Address:
jhborges@ull.es; mrguez@ull.es

Cited References:
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CAO AY, 2001, CARBON, V39, P152.
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180

Times Cited:
0

Publisher:
ELSEVIER SCIENCE BV; PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS

Subject Category:
Biochemical Research Methods; Chemistry, Analytical

ISSN:
0021-9673

DOI:
10.1016/j.chroma.2009.10.083

IDS Number:
582AJ

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Cited Article: Sokhan VP. Fluid flow in nanopores: Accurate boundary conditions for carbon nanotubes
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Title:
Towards mimicking natural protein channels with aligned carbon nanotube membranes for active drug delivery

Authors:
Majumder, M; Stinchcomb, A; Hinds, BJ

Author Full Names:
Majumder, Mainak; Stinchcomb, Audra; Hinds, Bruce J.

Source:
LIFE SCIENCES 86 (15-16): 563-568 APR 10 2010

Language:
English

Document Type:
Review

Author Keywords:
Drug delivery; Biomimetic; Nanostructure; Gatekeeper; Membrane; Transdermal; Nanoporous

KeyWords Plus:
WATER; TRANSPORT; POLYSTYRENE; GROWTH; FLOW

Abstract:
Aims: Carbon nanotube (CNT) membranes offer an exciting opportunity to mimic natural protein channels due to 1) a mechanism of dramatically enhanced fluid flow 2) ability to place 'gatekeeper' chemistry at the entrance to pores 3) the ability for biochemical reactions to occur on gatekeeper molecules and 4) an ability to chemically functionalize each side of the membrane independently.
Main methods: Aligned CNT membranes were fabricated and CNT pore entrances modified with gatekeeper chemistry. Pressure driven fluid flow and diffusion experiments were performed to study the mechanisms of transport through CNTs.
Key findings: The transport mechanism through CNT membranes is primarily 1) ionic diffusion near bulk expectation 2) gas flow enhanced 1-2 orders of magnitude primarily due to specular reflection 3) fluid flow 4-5 orders of magnitude faster than conventional materials due to a nearly ideal slip-boundary interface. The transport can be modulated by 'gatekeeper' chemistry at the pore entrance using steric hindrance, electrostatic attraction/repulsion, or biochemical state. The conformation of charged tethered molecules can be modulated by applied bias setting the stage for programmable drug release devices.
Significance: The membrane structure is mechanically far more robust than lipid bilayer films, allowing for large-scale chemical separations, delivery or sensing based on the principles of protein channels. The performance of protein channels is several orders of magnitude faster than conventional membrane materials. The fundamental requirements of mimicking protein channels are present in the CNT membrane system. Crown Copyright (C) 2009 Published by Elsevier Inc. All rights reserved.

Reprint Address:
Hinds, BJ, Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40502 USA.

Research Institution addresses:
[Majumder, Mainak; Hinds, Bruce J.] Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40502 USA; [Stinchcomb, Audra] Univ Kentucky, Coll Pharm, Lexington, KY 40502 USA

E-mail Address:
bjhinds@engr.uky.edu

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33

Times Cited:
1

Publisher:
PERGAMON-ELSEVIER SCIENCE LTD; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND

Subject Category:
Medicine, Research & Experimental; Pharmacology & Pharmacy

ISSN:
0024-3205

DOI:
10.1016/j.lfs.2009.04.006

IDS Number:
581UY

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