Navigation Links
Molecules pass through nanotubes at size-dependent speeds
Date:9/12/2013

CAMBRIDGE, MA -- Like a pea going through a straw, tiny molecules can pass through microscopic cylinders known as nanotubes. This could potentially be used to select molecules according to size for example, to purify water by allowing water molecules to pass through while blocking salt or other substances.

Now, researchers at MIT, Seoul University in Korea and Ursinus College in Pennsylvania have found that such tubes are more selective than had been thought: Molecules of a precise size can zip through five times faster than those that are a bit smaller or larger. The new findings are published in the journal Nature Communications by MIT professor Michael Strano, graduate students Wonjoon Choi and Zachary Ulissi, and three others.

This size-dependence in nanotube transport was completely unexpected, says Strano, a professor of chemical engineering at MIT. "This work illustrates how transport in pores of this type remains exotic and relatively unexplored," he says.

The team "looked at ion transport through the smallest single nanopores that have been studied," Strano says. The carbon nanotubes they studied had widths ranging from 0.9 to 2 nanometers about the diameter of a DNA helix and were about 1 millimeter long.

"What we found was not predicted by theory," he says: Up to a certain diameter, the flow of ions through a nanotube increased steadily but then beyond that diameter, the flow decreased. "The dependence is a volcano-shaped plot," Strano says.

The peak flow, at the center of that plot, allows transport that is five times greater than transport at smaller or larger diameters. "The experimental results are counterintuitive," Strano says, "that there appears to be an optimal diameter."

This size-dependence of transport could turn out to be useful in a variety of technologies, he suggests, including proton-exchange membrane (PEM) fuel cells, where molecules of oxygen or hydrogen must pass thr
'/>"/>

Contact: Sarah McDonnell
s_mcd@mit.edu
617-253-8923
Massachusetts Institute of Technology
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Predictive Biomarker Discovery for Oncology Small-Molecules and Biologics - a Webinar Hosted by Xtalks
2. South Dakota School of Mines & Technology Researchers Document Splitting Water Molecules in Multiple Thermochemical Cycles with Goal to Sustain Hydrogen Energy
3. Islet Sciences Announces Exclusive License Agreement with the University of California (UCLA) to Commercialize Small Molecules for Islet Expansion
4. Imprisoned molecules quantum rattle in their cages
5. Metamolecules that switch handedness at light-speed
6. Study improves understanding of surface molecules in controlling size of gold nanoparticles
7. Discarded data may hold the key to a sharper view of molecules
8. Computer-designed molecules point to new therapy for cystic fibrosis
9. Single molecules in a quantum movie
10. LoneStar Heart Acquires Worldwide Exclusive Rights to New Class of Small Molecules That May Lead to New Treatments for Diabetes
11. In new quantum-dot LED design, researchers turn troublesome molecules to their advantage
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/2/2014)... Massachusetts , September 2, 2014 ... to BioData,s research and lab management services  ... management service, is pleased to announce the appointment of ... Culot most recently served as VP Marketing and Business ... life science research and clinical applications. Previously, ...
(Date:9/1/2014)... 01, 2014 The Collaborative R&D ... report provides comprehensive understanding and unprecedented access to ... by the worlds leading life science companies. , ... of how and why companies enter collaborative R&D ... partner’s negotiated deals terms provides critical insight into ...
(Date:8/31/2014)... Dallas, Texas (PRWEB) August 31, 2014 ... on the current state of the Epoxy Hardener ... provides a basic overview of the industry, including ... analysis and Chinese domestic market analysis are provided ... competitive landscape of the market. A comparison between ...
(Date:8/29/2014)... Albany, New York (PRWEB) August 29, 2014 ... be valued at $5.6 billion in 2019. It ... 18.1% from 2013 to 2019, and was valued ... research report published by Transparency Market Research. , ... please visit: http://www.transparencymarketresearch.com/companion-diagnostics-market.html . , The research ...
Breaking Biology Technology:Louis Culot Appointed as BioData's CEO 2Collaborative R&D Terms & Agreements in Pharma, Biotech and Diagnostics Industry Analysis, Size, Share, Growth, Trends And Forecast Research Report by Researchmoz.us 2Collaborative R&D Terms & Agreements in Pharma, Biotech and Diagnostics Industry Analysis, Size, Share, Growth, Trends And Forecast Research Report by Researchmoz.us 3Collaborative R&D Terms & Agreements in Pharma, Biotech and Diagnostics Industry Analysis, Size, Share, Growth, Trends And Forecast Research Report by Researchmoz.us 4Epoxy Hardener Industry Development Trends in Global & China Regions Now Available at ReportsnReports.com 2Epoxy Hardener Industry Development Trends in Global & China Regions Now Available at ReportsnReports.com 3Companion Diagnostics Market to Hit $5.6 Billion in 2019: Transparency Market Research 2Companion Diagnostics Market to Hit $5.6 Billion in 2019: Transparency Market Research 3
... Medarex, Inc. (Nasdaq: MEDX ) is ... at 8:30 a.m. Eastern Time on Thursday, April 30, ... for the first quarter of 2009.To access the call ... webcast can be accessed through the Investor Relations section ...
... Integrity Provider First to Bring IP Ownership into Discussion , ... ... LLC , the leading provider of data integrity solutions, announced today ... and only data integrity protection provider of its kind ...
... BioMS Medical Corp (TSX: MS), a leading developer in the ... Giese, President and CEO, will present at a session entitled ... technology sector" as part of the Alberta Economic Forum in ... Monday May 4th at 10:05am (Local time), ...
Cached Biology Technology:Medarex to Host Business and Financial Update Conference Call on Thursday, April 30, 2009 2Surety, LLC Joins Microsoft BioIT Alliance 2Surety, LLC Joins Microsoft BioIT Alliance 3BioMS Medical to present at Alberta Economic Forum in Geneva 2
(Date:9/2/2014)... Sam Kean stops by Reactions this week to debunk ... that, despite what "Shark Week" may lead you to ... http://youtu.be/KhFygIoW_MA . , Kean,s book, "The Disappearing Spoon: ... History of the World from the Periodic Table of ... 10-episode video series produced for the newly launched American ...
(Date:9/2/2014)... spiky legs and their propensity for eating anything, including ... And now research from North Carolina State University finds ... across the eastern United States. , "The good news ... kind of threat to humans," says Dr. Mary Jane ... author of a paper about the research. , The ...
(Date:9/2/2014)... N.C. -- When you accidentally touch a hot oven, ... the basic neural circuits involved in sensing and responding ... the molecular players. , Duke researchers have made a ... involved in pain in worms, and have built a ... 2 in Nature Communications , may help direct ...
Breaking Biology News(10 mins):Researchers find Asian camel crickets now common in US homes 2Surprising new role for calcium in sensing pain 2Surprising new role for calcium in sensing pain 3
... of Alzheimer,s disease reports improvement in language abilities ... the research, published today in the open access ... minutes of using this new treatment. Building ... in BioMed Central,s Journal of Neuroinflammation, ...
... to be the niche. As air and water preceded life, ... cells in many tissues and provides factors necessary to keep ... cell dependents. A team of scientists at the ... assistant professor in the Laboratory of Genetics, now suggests that ...
... the burgeoning field of interventional therapies for congenital ... Vegas July 20-23 for the Pediatric & Adult ... Medical Center in Chicago will perform live cases ... On Monday, July 21st, Dr. Ziyad M. ...
Cached Biology News:Stem cell chicken and egg debate moves to unlikely arena: the testes 2Stem cell chicken and egg debate moves to unlikely arena: the testes 3Latest advances in interventional cardiology for congenital heart disease presented 2
... and affinity purification of small components ... monodisperse magnetic particles (2.8 m in ... surface activation is not required. Allows ... orientation for affinity purification of proteins. ...
ZO-2 (H-110)...
p-Bcl-2 (Thr 74)...
Derlin-2 (C-18)...
Biology Products: