Navigation Links
Simulations help explain fast water transport in nanotubes
Date:9/16/2008

CHAMPAIGN, Ill. By discovering the physical mechanism behind the rapid transport of water in carbon nanotubes, scientists at the University of Illinois have moved a step closer to ultra-efficient, next-generation nanofluidic devices for drug delivery, water purification and nano-manufacturing.

"Extraordinarily fast transport of water in carbon nanotubes has generally been attributed to the smoothness of the nanotube walls and their hydrophobic, or water-hating surfaces," said Narayana R. Aluru, a Willett Faculty Scholar and a professor of mechanical science and engineering at the U. of I.

"We can now show that the fast transport can be enhanced by orienting water molecules in a nanotube," Aluru said. "Orientation can give rise to a coupling between the water molecules' rotational and translational motions, resulting in a helical, screw-type motion through the nanotube," Aluru said.

Using molecular dynamics simulations, Aluru and graduate student Sony Joseph examined the physical mechanism behind orientation-driven rapid transport. For the simulations, the system consisted of water molecules in a 9.83 nanometer long nanotube, connected to a bath at each end. Nanotubes of two diameters (0.78 nanometers and 1.25 nanometers) were used. Aluru and Joseph reported their findings in the journal Physical Review Letters.

For very small nanotubes, water molecules fill the nanotube in single-file fashion, and orient in one direction as a result of confinement effects. This orientation produces water transport in one direction. However, the water molecules can flip their orientations collectively at intervals, reversing the flow and resulting in no net transport.

In bigger nanotubes, water molecules are not oriented in any particular direction, again resulting in no transport.

Water is a polar molecule consisting of two hydrogen atoms and one oxygen atom. Although its net charge is zero, the molecule has a positive side (hydrogen)
'/>"/>

Contact: James E. Kloeppel
kloeppel@illinois.edu
217-244-1073
University of Illinois at Urbana-Champaign
Source:Eurekalert

Page: 1 2

Related biology news :

1. Are existing large-scale simulations of water dynamics wrong?
2. Computer simulations point to key molecular basis of cystic fibrosis
3. Genes newly explained effect on height may change tumor disorder treatment
4. Eating fish may explain very low levels of heart disease in Japan
5. UGA researchers discover mechanism that explains how cancer enzyme winds up on ends of chromosomes
6. Researchers explain nitrogen paradox in forests
7. Mechanism explains link between apolipoprotein E and Alzheimers disease
8. Statistical tool could explain gene study variations
9. Monarch butterflies help explain why parasites harm hosts
10. Genetic breakthrough explains dangerously high blood glucose levels
11. Computers explain why pears may become brown during commercial storage
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/11/2014)... 2014  Forensicon, Inc., a Chicago ... announce the promotion of Yaniv Schiff from ... In Schiff,s new role as Director, he will lead ... forensics examiners and provide leadership within the company,s digital ... http://photos.prnewswire.com/prnh/20141110/157719 Schiff joined Forensicon in ...
(Date:11/7/2014)... -- Leading Biometric companies aim to provide consumers ... transactions.  Companies in focus today are: NXT-ID, Inc. (NASDAQ: ... ), Google Inc. (NASDAQ: GOOG ), Microsoft Corporation ... EBAY ) and MasterCard Inc. (NYSE: MA) NXT-ID, ... authentication company focused on the growing mobile commerce is pleased ...
(Date:11/6/2014)... Medicine, Inc, a Baltimore-based bioinformatics company focused on ... a research collaboration with the international leader in ... CSBR). , "There are many companies utilizing advances ... TumorGraft technology is unique in a way that ... vast amounts of valuable data. Our bioinformatic analysis ...
Breaking Biology News(10 mins):Yaniv Schiff Promoted to Director of Digital Forensics at Forensicon, Inc. 2Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 2Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 3Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 4Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 5Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 6Insilico Medicine, Inc announces research collaboration with Champions Oncology, Inc 2
... issue of Genes & Development, Dr. Karlene Cimprich and ... structure sufficient to activate the ATR-mediated DNA damage checkpoint. ... says Dr. Cimprich. "The ability to precisely define and ... an experimental system will enable us to control, quantitative ...
... one cause of high blood pressure lies within the brain, ... forward by scientists at the University of Bristol, UK, and ... Hidefumi Waki, working in a research group led by Professor ... JAM-1 (junctional adhesion molecule-1), which is located in the walls ...
... Trek: The Next Generation," Geordi La Forge is a ... special implants in his eyes. While the Star Trek ... the 21st century may not have to wait that ... a University of Missouri-Columbia veterinary ophthalmologist, has been working ...
Cached Biology News:Blame the brain for high blood pressure 2MU researcher placing eye implants in cats to help humans see 2
(Date:11/26/2014)... Pittsburgh, PA (PRWEB) November 25, 2014 ... release of its official conference and exposition mobile app, ... available for free download in the App Store for ... as a valuable resource tool before, during and after ... guide containing details on exhibiting companies, technical sessions, Conferee ...
(Date:11/26/2014)... November 26, 2014 CURE™ magazine ... reception on December 5, 2014, in San Francisco prior ... MPN Heroes event will honor clinicians, caregivers, and advocates ... myeloproliferative neoplasms (MPNs). , Special guest speaker Charles ... family's cancer journey at the reception. Over a ...
(Date:11/26/2014)... , 25 novembre 2014 /PRNewswrie/ -- Theravalues Corporation ... il mercato europeo in occasione di Hi Europe 2014 ... ). Si tratta della curcumina con la ... amorfa (senza cristalli) e ingredienti approvati dalle norme europee. ... nella spezia della pianta curcumina ( Curcuma longa ) ...
(Date:11/24/2014)... 2014  Last week, Representatives Gus Bilirakis ... took a bold bipartisan step on behalf of ... Act. Original co-sponsors of the legislation include Representatives ... incentivize drug makers and innovators to "repurpose" major ... cancers, which opens the door to the development ...
Breaking Biology Technology:Pittcon Releases 2015 Mobile App 2CURE Magazine and Incyte to Honor MPN Heroes 2CURE Magazine and Incyte to Honor MPN Heroes 3CURE Magazine and Incyte to Honor MPN Heroes 4La curcumina con la maggiore biodisponibilità di sempre farà il suo debutto in Europa 2La curcumina con la maggiore biodisponibilità di sempre farà il suo debutto in Europa 3OPEN Act Introduced to Repurpose Drugs for Rare Diseases 2
... 6 Axelar AB today announced successful,completion of ... phase I/II,clinical trial on cancer patients with its ... inhibitor which has no effects,on the closely related ... on,patients having terminal cancer disease. The results showed ...
... -- Simcere Pharmaceutical Group,(NYSE: SCR ), ... and,innovative anti-cancer pharmaceuticals in China, announced today that ... on Monday, May 18, 2009,after the market closes ... Ren, and chief financial officer, Frank Zhigang Zhao, ...
... 5 Neurocrine Biosciences, Inc. (Nasdaq: NBIX ) today ... For the first quarter of 2009, the Company reported a ... a net loss of $21.1 million, or $0.55 per share, for ... 2009 were $0.7 million compared with $1.8 million for the same ...
Cached Biology Technology:Successful Phase I/II Clinical Trial Results From Cancer Patients Treated With Anti-Cancer Drug From Axelar AB 2Simcere Pharmaceutical Group to Announce 2009 First Quarter Earnings on Monday, May 18, 2009 2Neurocrine Biosciences Reports First Quarter 2009 Results 2Neurocrine Biosciences Reports First Quarter 2009 Results 3Neurocrine Biosciences Reports First Quarter 2009 Results 4Neurocrine Biosciences Reports First Quarter 2009 Results 5Neurocrine Biosciences Reports First Quarter 2009 Results 6Neurocrine Biosciences Reports First Quarter 2009 Results 7Neurocrine Biosciences Reports First Quarter 2009 Results 8
... and efficient method for purification of DNA fragments ... fragments selectively absorbed in the spin column after ... room temperature for PCR product with equal volume ... DNA can be purified with a single prep ...
BlotGel application pool -see Blotters (Semi-Dry) for more info...
lid holder -see Blotters (Semi-Dry) for more info...
When added to either StemSep CD4+ or CD8+ T Cell Enrichment cocktails, human CD45RA TAC is designed to deplete human CD45RA from samples to isolate memory CD4+ or CD8+ T cells....
Biology Products: