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:11/6/2014)... when that predator runs so fast that it essentially blinds ... the fastest creature on Earth. Some of these half-inch-long beetles ... miles per hour). The fastest human can do about five ... beetle, a person would have to hit 480 miles per ... peak speeds, everything becomes a blur. They can,t gather enough ...
(Date:11/5/2014)... his career to understanding the Earth,s climate and ... As deputy director and regional climatologist for the ... Institute, Redmond has more than three decades of ... climate data to the general public. , At ... on December 15-19, 2014 the American Geophysical Union ...
(Date:11/4/2014)... the right time might actually help boost a species, ... in understanding animal populations, pest control and managing fish ... journal Trends in Ecology and Evolution , a ... kind of positive population effect an overall species experiences ... the size and developmental stage of the creatures that ...
Breaking Biology News(10 mins):The tiger beetle: Too fast to see 2Nevada climatologist to be honored at AGU Fall Meeting for lifetime of public outreach 2When less is more: Death in moderation boosts population density in nature 2
... all holders of a valid press card / formal ... press facilities, including a working room and an interview ... to assist you in organising interviews with relevant experts. ... online at: http://www.eular.org/congress_press_registration.cfm , Please direct any ...
... populations have traditionally been thought of as ... in single-cell observational techniques, like flow cytometry, ... for the observation of individual microbes within ... and Biological Synthesis (NIMBioS) is now accepting ...
... Louis scientists are imitating nature as they attempt to solve ... tendon to bone. Their goal is to improve the ... the group of four tendons and muscles that surround the ... detach from the bone. Commonly thought of as a ...
Cached Biology News:Ecology of microbes focus of workshop 2Biomimetic patch to be tested on tricky tendon-to-bone repairs 2Biomimetic patch to be tested on tricky tendon-to-bone repairs 3Biomimetic patch to be tested on tricky tendon-to-bone repairs 4
(Date:11/21/2014)... , November 21, 2014 , ... responsable comercial   Mariano Rodríguez es elegid ... KLOX está en marcha para comenzar de ... cura de heridas de reciente aprobación en Europa   , ... compañía") se complace al anunciar los siguientes nombramientos: ...
(Date:11/21/2014)... CA (PRWEB) November 20, 2014 Author ... Short Walk to the Other Side” published as ... “Award-Winning Finalist in the “Fiction: Short Story” category of ... Jeffrey Keen, President and CEO of USA Book News, ... mainstream and independent publishers, including Simon & Schuster, Penguin, ...
(Date:11/21/2014)... BlueInGreen, LLC ( BlueInGreen® ) and ... PCI, Inc., leading suppliers of ozone process technology ... to provide a new state-of-the-art ozone system for ... Wastewater Treatment. The new ozone disinfection system ... dissolution technology, Pinnacle Ozone’s industry leading Zenith™ ozone ...
(Date:11/21/2014)... , Nov. 20, 2014 Polaris Group ... dosed in its Phase 1 trial of ADI-PEG ... the treatment of malignant pleural mesothelioma (MPM) and ... conducting clinical trials on ADI-PEG 20, both as ... the treatment of several other indications, including breast ...
Breaking Biology Technology:KLOX Technologies anuncia sus nombramientos ejecutivos 2KLOX Technologies anuncia sus nombramientos ejecutivos 3KLOX Technologies anuncia sus nombramientos ejecutivos 4KLOX Technologies anuncia sus nombramientos ejecutivos 5Mystic Ink 's Short Story Collection “A Short Walk to the Other Side” Honoring Ray Bradbury Praised As Award-Winning Finalist In USA Best Book Awards 2Mystic Ink 's Short Story Collection “A Short Walk to the Other Side” Honoring Ray Bradbury Praised As Award-Winning Finalist In USA Best Book Awards 3Mystic Ink 's Short Story Collection “A Short Walk to the Other Side” Honoring Ray Bradbury Praised As Award-Winning Finalist In USA Best Book Awards 4City of Fayetteville Leads Nation with Innovative Ozone Technology 2City of Fayetteville Leads Nation with Innovative Ozone Technology 3City of Fayetteville Leads Nation with Innovative Ozone Technology 4Polaris Group Announces Treatment of First Patient in Phase 1 Study of ADI-PEG 20 plus Pemetrexed and Cisplatin in Malignant Pleural Mesothelioma And Non-Squamous Non-Small Cell Lung Carcinoma 2
... AUSTIN, Texas, March 1, 2012 The nonprofit American ... Ph.D., of the University of Illinois – Chicago (UIC) ... Farnsworth Excellence in Botanical Research Award. (Logo: ... is ABC,s co-founding Board of Trustees member, the late ...
... Reportlinker.com announces that a new market research ... Global Biotechnology Industry ... series on Biotechnology provides a collection of ... of research findings. The report offers a ...
... AHRO), a biotech company focused on the research and ... that it has initiated the first shipment of AHRO-001 ... partner CardioNova, Ltd., a Russia based biotech company responsible ... AHRO-001. The clinical-grade material will be used to commence ...
Cached Biology Technology:Professor Doel Soejarto to Receive ABC's Farnsworth Excellence in Botanical Research Award 2Professor Doel Soejarto to Receive ABC's Farnsworth Excellence in Botanical Research Award 3Professor Doel Soejarto to Receive ABC's Farnsworth Excellence in Botanical Research Award 4Global Biotechnology Industry 2Global Biotechnology Industry 3Global Biotechnology Industry 4Global Biotechnology Industry 5Global Biotechnology Industry 6AtheroNova Achieves Milestone in Initiating First Shipment of AHRO-001 2AtheroNova Achieves Milestone in Initiating First Shipment of AHRO-001 3
... than western blotting. Get results sooner and save ... gel detection. Eliminates the need for a membrane ... All reagents are ready-to-use. No reagents to prepare ... 2 reagents required. Guarantees a simple to perform, ...
... variable angle system, 220-240 V, is used to ... DNA fragments by pulsed field gel electrophoresis (PFGE). ... variable-speed pump, 14 x 13 cm casting stand ... mm thick comb, screened cap, disposable plug molds, ...
High affinity antibodies recognizes HSP70 protein from human cardiac tissue. Could be used for Westerb blotting application, ELISA....
... The RC DC protein assay kit I ... protein concentration in the presence of reducing agents ... a colorimetric assay. The kit includes reagents and ... RC reagent I, 250 ml RC reagent II, ...
Biology Products: