Navigation Links
Scientists observe single ions moving through tiny carbon-nanotube channel
Date:9/9/2010

the electric current can travel from one electrode to the other, the researchers can easily determine whether ions are traveling through the nanotube.

They found that protons do flow steadily across the nanotube, carrying an electric current. Protons flow easily through the nanochannel because they are so small, but the researchers observed that other positively charged ions, such as sodium, can also get through but only if enough electric field is applied. Sodium ions are much larger than protons, so they take longer to cross once they enter. While they travel across the channel, they block protons from flowing, leading to a brief disruption in current known as the Coulter effect.

Strano believes that the channels allow only positively charged ions to flow through them because the ends of the tubes contain negative charges, which attract positive ions. However, he plans to build channels that attract negative ions by adding positive charges to the tube.

Once the researchers have these two types of channels, they hope to embed them in a membrane that could also be used for water desalination. More than 97 percent of Earth's water is in the oceans, but that vast reservoir is undrinkable unless the salt is removed. The current desalination methods, distillation and reverse osmosis, are expensive and require lots of energy. So a nanotube membrane that allows both sodium and chloride ions (which are negatively charged) to flow out of seawater could become a cheaper way to desalinate water.

This study marks the first time that individual ions dissolved in water have been observed at room temperature. This means the nanochannels could also detect impurities, such as arsenic or mercury, in drinking water. (Ions can be identified by how long it takes them to cross the channel, which depends on their size). "If a single arsenic ion is floating in solution, you could detect it," says Strano.


'/>"/>

Contact: Jen Hirsch
jfhirsch@mit.edu
617-253-1682
Massachusetts Institute of Technology
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Waters Corporation and UCLA to Convene Leading Life Scientists
2. Castor Bean Genome Published by Research Team Including Scientists from the Venter Institute
3. Scientists achieve highest-resolution MRI of a magnet
4. Univfy and Stanford Scientists Develop the First Personalized Prognostic Test to Predict Live Birth Outcomes with In Vitro Fertilization
5. Stanford scientists develop new way to grow adult stem cells in culture
6. Princeton scientists find unusual electrons that go with the flow
7. Twelve Women Scientists Announced as Winners of Elsevier Foundation TWOWS Awards
8. Scientists strive to replace silicon with graphene on nanocircuitry
9. Prestigious International Champalimaud Vision Award to US Scientists
10. Scientists Give the Go-Ahead for Private Storage of Stem Cells From Umbilical Cord Blood
11. Scientists create artificial mini black hole
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/28/2014)... City, CA (PRWEB) August 28, 2014 ... sanitation products for the food processing industry, is asking ... a side-by side comparison of the E2 soap they’re ... E2 Sanitizing Foam Soap . Hand hygiene is ... in the food processing environment. Six key criteria are ...
(Date:8/28/2014)... Aug. 28, 2014 ... market research report is available ... Whole Exome Sequencing Market by ... Target Enrichment), by Services (Sequencing), ... by Application (Cancer, Monogenic disorders) ...
(Date:8/28/2014)... , Aug. 28, 2014  Armetheon, Inc. ... developing novel mid- to late-stage cardiovascular drug candidates, ... in its first round of financing. The Series ... and Hercules Bioventures with participation from investors that ... pharmaceutical executive, Dr. Larry Hsu , the ...
(Date:8/28/2014)... PrimeSource Building Products, Inc., a ... SoundConnect to support their communication needs with ... web conferencing platform GlobalMeet powered by SoundConnect. The ... SoundConnect delivers award winning “results driven” business ... will be utilizing GlobalMeet powered by SoundConnect ...
Breaking Biology Technology:Best Sanitizers, Inc. Asks Food Industry Professionals: With Fall Harvest On the Way, Is Your E2 Hand Soap Up to the Task? 2Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 2Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 3Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 4Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 5Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 6Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 7Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 8Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 9Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 10Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 11Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 12Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 13Armetheon Completes $7.0 Million Series A Financing 2Armetheon Completes $7.0 Million Series A Financing 3PrimeSource Chooses SoundConnect as Collaboration Provider 2
... Biomedical, Inc., a,leader in human embryonic stem cell ... an exclusive worldwide technology licensing agreement,with the University ... to commercialize human mesenchymal cells developed at the,University ... Under the terms of the agreement, ArunA ...
... ,endometrial regenerative cells, (ERCs) are capable of restoring ... peripheral artery disease. A study published today in ... demonstrates that when circulation-blocked mice were treated with ... , Critical limb ischemia, an advanced form ...
... Builds on Existing Brand Strength and Pediatric ... ... PLYMOUTH MEETING, Pa., Aug. 18 /Xinhua-PRNewswire-FirstCall/ -- BMP,Sunstone Corporation ... (Tangshan) Pharmaceutical Co., Ltd.,("Sunstone"), its wholly-owned subsidiary, has received a ...
Cached Biology Technology:ArunA Biomedical Announces Exclusive Worldwide Technology Licensing Agreement to Commercialize Human Embryonic Stem Cell Derived Mesenchymal Cells 2Limbs saved by menstrual blood stem cells 2BMP Sunstone Receives Production License from the SFDA to Manufacture and Market Pediatric Multivitamin Granules in the PRC 2BMP Sunstone Receives Production License from the SFDA to Manufacture and Market Pediatric Multivitamin Granules in the PRC 3BMP Sunstone Receives Production License from the SFDA to Manufacture and Market Pediatric Multivitamin Granules in the PRC 4
(Date:8/28/2014)...  Privacy Advocate and Senior Staff Attorney at the ... the lineup of biometric and mobile commerce experts set ... Summit in Tampa, Florida on ... include Steven Rahman, Director, Technology and Strategy at Samsung, and ... theme of this year,s event is Mobility at the ...
(Date:8/28/2014)... WASHINGTON, Aug. 28, 2014A new method for measuring and ... help doctors and researchers better understand how drug abuse ... surgery and tissue engineering, and lead to better treatment ... by a team of researchers from Stony Brook University ... of Health, was published today in The Optical Society,s ...
(Date:8/28/2014)... mould in homes could pose a significant health risk to ... the Journal of Allergy and Clinical Immunology . , ... different countries, the research has found that the presence of ... asthma sufferers, as well as increasing the likelihood of developing ... team at the University of Exeter Medical School and is ...
Breaking Biology News(10 mins):Biometrics UnPlugged Welcomes the Electronic Frontier Foundation's Jennifer Lynch to the Mobility at the Crossroads of Commerce and Privacy Summit 2This is your brain's blood vessels on drugs 2This is your brain's blood vessels on drugs 3Indoor mold poses health risk to asthma sufferers 2
... still images and video, as well as local information ... of Life via new tools that let the public ... collaboration of unprecedented scale. Experts and citizen scientists ... which dedicates a Web page to each known species ...
... , , ... LLC, the image analysis and pattern recognition technology provider, today ... for online signature verification at the tenth International Conference on ... 26 - 29, 2009. Parascript was among 12 participants ...
... An indigenous family living in a mountainous area of ... discover information about genetic mutations associated with acromegaly, a form ... facial features. The information could lead to ... a benign pituitary gland tumor that can be deadly if ...
Cached Biology News:Cool new tools let public contribute to massive interactive online biodiversity encyclopedia 2Cool new tools let public contribute to massive interactive online biodiversity encyclopedia 3Cool new tools let public contribute to massive interactive online biodiversity encyclopedia 4Cool new tools let public contribute to massive interactive online biodiversity encyclopedia 5Cool new tools let public contribute to massive interactive online biodiversity encyclopedia 6Cool new tools let public contribute to massive interactive online biodiversity encyclopedia 7Parascript Technology Wins Online Signature Verification Competition 2Clues to gigantism provided by family in Borneo Mountains 2
Rabbit anti-CRSP1 (TRAP220), Polyclonal Antibody, Unconjugated Applications: Immunohistochemistry - 1:100 - 1:500...
... Molecular Probes is pleased to ... for the ultrasensitive detection of primary ... at Indiana University, the ATTO-TAG reagents ... o-phthaldialdehyde (OPA), naphthalene-2,3-dicarboxaldehyde (NDA) and anthracene-2,3-dicarboxaldehyde, ...
... pleased to offer the ATTO-TAG series ... of primary amines. Developed by Novotny ... ATTO-TAG reagents are similar to the ... and anthracene-2,3-dicarboxaldehyde, all of which are ...
...
Biology Products: