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:8/17/2015)... Aug. 17, 2015  NXT-ID, Inc. (NASDAQ: NXTD ... focused on the growing mobile commerce market and creator ... campaign for Q4 2015. The new marketing campaign is ... of Amplitude Marketing Group ( http://amplitudemarketing.com/ ) and TPMG ... a leader in retail driven marketing and brand awareness ...
(Date:8/12/2015)... , August 12, 2015 ... of mobile payment innovation and advanced biometrics technology is ... the way consumers rely on using their credit cards, ... reinventing the future for payment services led by companies ... NXTD ), :  Google, Inc. (NASDAQ: GOOG ), ...
(Date:8/12/2015)... , Aug. 12, 2015  Synaptics Inc. (NASDAQ: ... interface solutions, today announced that four of its ... solution, have officially been named FIDO Certified™ by ... of the certification, Synaptics, Natural ID™ fingerprint solutions ... Authentication Framework (UAF) standard and are interoperable among ...
Breaking Biology News(10 mins):NXT-ID, Inc. Launches Sales Campaign for Wocket Smart Wallet with Award Winning Marketing Team 2NXT-ID, Inc. Launches Sales Campaign for Wocket Smart Wallet with Award Winning Marketing Team 3Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 2Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 3Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 4Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 5Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 6Synaptics Announces FIDO Certification of Natural ID Fingerprint Solutions 2Synaptics Announces FIDO Certification of Natural ID Fingerprint Solutions 3
... it, bread that contains critical nutrients could help combat ... of a group of Johns Hopkins University undergraduate students ... so that it yields beta carotene, the orange substance ... turns into vitamin A. The students, project ...
... likely, you would be disgusted if confronted with a ... worms. Or a particularly bloody wound. Or a horribly ... disgust you feel may lend important insight into your ... scientists closely measured people,s physiological reactions as they looked ...
... -- Low levels of a brain protein that regulates gene ... disorder, a complex and sometimes disabling psychiatric disease. As reported ... journal of The International Society for Bipolar Disorders, levels of ... of the brain in postmortem samples from patients with bipolar ...
Cached Biology News:Students coax yeast cells to add vitamins to bread 2Students coax yeast cells to add vitamins to bread 3Students coax yeast cells to add vitamins to bread 4That's gross!: Study uncovers physiological nature of disgust in politics 2Gene regulatory protein is reduced in bipolar disorder 2Gene regulatory protein is reduced in bipolar disorder 3
(Date:8/31/2015)... FL (PRWEB) , ... August 31, 2015 , ... ... bring together the world's most successful food and beverage processors, equipment manufacturers and ... competencies in product inspection and industrial weighing and formulation for manufacturers of bakery ...
(Date:8/31/2015)... ... August 31, 2015 , ... Proove Biosciences, Inc. is a finalist for ... High Tech Awards. , Now in its 22nd year, this premier awards event celebrates ... across the nation and around the world. The OC Tech Alliance will announce all ...
(Date:8/28/2015)... Aug. 28, 2015 Research ... of the "Global & USA BioSimilar Market Analysis ... The highly awaited US Biosimilar market will be initiated ... biologic, Zarxio. How will the global market react? Will ... that biosimilars could save the US economy up to ...
(Date:8/28/2015)... ... August 28, 2015 , ... ... studies at the International Spine Intervention Society’ s 23rd Annual Scientific ... August 1st, 2015. With a focus on evidence-based research and clinical application, the ...
Breaking Biology Technology:METTLER TOLEDO Hosts Food Safety Educational Center at 2015 PROCESS EXPO 2Proove Biosciences, Inc. Named a Finalist for 22nd OC Tech Alliance High-Tech Awards for Company of the Year 2Proove Biosciences, Inc. Named a Finalist for 22nd OC Tech Alliance High-Tech Awards for Company of the Year 3Proove Biosciences, Inc. Named a Finalist for 22nd OC Tech Alliance High-Tech Awards for Company of the Year 4Global & USA BioSimilar Market Analysis Report 2015-2021 2Global & USA BioSimilar Market Analysis Report 2015-2021 3Proove Biosciences Presents New Research Study at the International Spine Intervention Society’s Annual Scientific Meeting 2Proove Biosciences Presents New Research Study at the International Spine Intervention Society’s Annual Scientific Meeting 3Proove Biosciences Presents New Research Study at the International Spine Intervention Society’s Annual Scientific Meeting 4
... , SAN DIEGO, Calif., INDIANAPOLIS, Ind., and CAMBRIDGE, ... ), Eli Lilly and Company (NYSE: LLY ) and Alkermes, ... 20 studies at the 45th Annual Meeting of the European Association for ... 29 to Oct. 2. The companies will present the latest research findings ...
... ... million round of funding. Participating investors included CTTV Investments LLC, the venture capital ... , ... Francisco, CA (PRWEB) September 24, 2009 -- LS9, Inc., the Renewable Petroleum Company™, today ...
... , , PHILADELPHIA and LONDON, ... -- researchers likely to be in contention for Nobel honors -- in anticipation ... be announced from October 5-12. , , Thomson Reuters ... Nobel Prize winners. , , Each year, data ...
Cached Biology Technology:Amylin and Lilly to Present More than 20 Studies for Exenatide at EASD 2009 2Amylin and Lilly to Present More than 20 Studies for Exenatide at EASD 2009 3Amylin and Lilly to Present More than 20 Studies for Exenatide at EASD 2009 4Amylin and Lilly to Present More than 20 Studies for Exenatide at EASD 2009 5Amylin and Lilly to Present More than 20 Studies for Exenatide at EASD 2009 6Amylin and Lilly to Present More than 20 Studies for Exenatide at EASD 2009 7LS9 Secures $25 Million in Latest Round of Funding 2LS9 Secures $25 Million in Latest Round of Funding 3Thomson Reuters Predicts Nobel Laureates 2Thomson Reuters Predicts Nobel Laureates 3Thomson Reuters Predicts Nobel Laureates 4Thomson Reuters Predicts Nobel Laureates 5Thomson Reuters Predicts Nobel Laureates 6
... Complete kit for stabilizing 1.5mg of purified ... optimised for the stabilization of aqueous RNA ... methods such as guanidine, phenol/chloroform, silica, oligo ... StabMRT Kits contain all the necessary components ...
... stabilizing 50g of purified RNA samples for RT-PCR ... all of the advantages and applications you expect ... RNA can be used for enzymatic applications such ... been optimised for the stabilization of aqueous RNA ...
Blasticidin resistance gene (bsr), provided in a pORF plasmid. pORF is an expression plasmid selectable with Ampicillin....
Puromycin resistance gene (pac), provided in a pORF plasmid. pORF is an expression plasmid selectable with Ampicillin....
Biology Products: