Navigation Links
'Going negative' pays for nanotubes
Date:5/3/2013

A Rice University laboratory's cagey strategy turns negatively charged carbon nanotubes into liquid crystals that could enhance the creation of fibers and films.

The latest step toward making macro materials out of microscopic nanotubes depends on cage-like crown ethers that capture potassium cations. Negatively charged carbon nanotubes associate with potassium cations to maintain their electrical neutrality. In effect, the ethers help strip these cations from the surface of the nanotubes, resulting into a net charge that helps counterbalance the electrical van der Waals attraction that normally turns carbon nanotubes into an unusable clump.

The process by Rice chemist Angel Mart, his students and colleagues was revealed in the American Chemical Society journal ACS Nano.

Carbon nanotubes have long been thought of as a potential basis for ultrastrong, highly conductive fibers a premise borne out in recent work by Rice professor and co-author Matteo Pasquali and preparing them has depended on the use of a "superacid," chlorosulfonic acid, that gives the nanotubes a positive charge and makes them repel each other in a solution.

Mart and first authors Chengmin Jiang and Avishek Saha, both graduate students at Rice, decided to look at producing nanotube solutions from another angle. "We saw in the literature there was a way to do the opposite and give the surface of the nanotubes negative charges," Mart said. It involved infusing single-walled carbon nanotubes with alkali metals, in this case, potassium, and turning them into a kind of salt known as a polyelectrolyte. Mixing them into an organic solvent, dimethyl sulfoxide (DMSO), forced the negatively charged nanotubes to shed some potassium ions and repel each other, but in concentrations too low for extruding into fibers and films.

That took the addition of ether molecules known as 18-crown-6 for their crown-like atomic arrangements. The crowns have a particul
'/>"/>

Contact: David Ruth
david@rice.edu
713-348-6327
Rice University
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Blocked holes can enhance rather than stop light going through
2. Neuralstem President and CEO to Update Ongoing ALS and NSI-189/Major Depressive Disorder Trials at 2012 Biotech Showcase
3. New fuel cell keeps going after the hydrogen runs out
4. Sitting still or going hunting: Which works better?
5. Arnold Schwarzenegger's Climate Change Law Gets Enacted; Going Green News Site Green Bean Cleaning Urges Public to Help It Help Build a Greener Earth
6. Jennifer Aniston's People's Choice Awards Dress Worries Animal Welfare Advocates; Going Green News Site My Cleaning Products Comments It Was a Bad Pick
7. 3SBio Inc. Enters Into Merger Agreement For "Going Private" Transaction
8. Going a step Further: Phase IV and Post-Marketing Observational Studies add Value to new Therapies, life Science Webinar Hosted by Xtalks
9. New metamaterial allows transmission gain while retaining negative refraction property
10. Amsterdam Molecular Therapeutics Announces Negative Equity Position
11. Discovery opens door to low-cost negative refraction, new products and industries
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/26/2015)... LONDON , February 26, 2015 ... of subjects into PEACH, the first pivotal trial ... dialysis dependent chronic kidney disease (DD-CKD), has completed ... achieved. PT20, invented by leading UK-based ... licensed by Phosphate Therapeutics, is a novel phosphate ...
(Date:2/25/2015)... DIEGO , Feb. 25, 2015 Today, ... announced a realignment, including a number of promotions and ... of the company,s strategy to increase shareholder returns through ... the growing health care industry and the innovation sector. ... today, Kent Griffin is leaving his role ...
(Date:2/25/2015)... February 25, 2015 Salt ... $604,000 grant from the National Science Foundation’s ... (STEM) program. , The Foundation’s program supports scholarships ... enabling them to enter the workforce following completion ... STEM discipline. Institutions throughout the U.S. annually vie ...
(Date:2/25/2015)... MA (PRWEB) February 25, 2015 FloDesign ... to their Board of Directors. Michael “Mike” J. Harsh ... GE Healthcare till Dec 2014, and led their Global ... to our board will have a profound impact on ... research and development of acoustic based products in life ...
Breaking Biology Technology:Phosphate Therapeutics Announces Completion of Subject Recruitment Into the PEACH Pivotal Phase 2 Study of its Novel Phosphate Binder (PT20) for the Treatment of Hyperphosphataemia 2Phosphate Therapeutics Announces Completion of Subject Recruitment Into the PEACH Pivotal Phase 2 Study of its Novel Phosphate Binder (PT20) for the Treatment of Hyperphosphataemia 3BioMed Realty Announces Realignment To Leverage Depth Of Life Science Real Estate Expertise And Increase Shareholder Value 2BioMed Realty Announces Realignment To Leverage Depth Of Life Science Real Estate Expertise And Increase Shareholder Value 3BioMed Realty Announces Realignment To Leverage Depth Of Life Science Real Estate Expertise And Increase Shareholder Value 4SLCC Receives $600K National Science Foundation Grant 2FloDesign Sonics Inc adds Michael Harsh, Prior CTO GE Healthcare, to Board of Directors 2FloDesign Sonics Inc adds Michael Harsh, Prior CTO GE Healthcare, to Board of Directors 3
... , ... ... ... ...
... , ... symposium to unveil study aimed at ensuring global food security and sustainability. , ... Washington (PRWEB) -- On ... sustainably double agricultural output and improve storage and distribution to eliminate the global productivity ...
... ... ... ... ...
Cached Biology Technology:Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 2Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 3Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 4Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 5Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 6Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 7Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 8Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 9Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 10Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 11Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 12Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 13Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 14Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 15Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 16Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 17Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 18Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 19Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 20Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 21Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 22Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 23Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 24Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 25Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 26Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 27Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 28Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 29Cornerstone Therapeutics Reports Fourth Quarter and Full Year 2009 Financial Results 30Gloabl Harvest Initiative: Taking Down Fences To Meet Future Needs 2Gloabl Harvest Initiative: Taking Down Fences To Meet Future Needs 3Tianyin Pharmaceutical Co., Inc. to Present at the 2010 Rodman & Renshaw Annual China Investment Conference in Beijing on March 9 2Tianyin Pharmaceutical Co., Inc. to Present at the 2010 Rodman & Renshaw Annual China Investment Conference in Beijing on March 9 3Tianyin Pharmaceutical Co., Inc. to Present at the 2010 Rodman & Renshaw Annual China Investment Conference in Beijing on March 9 4Tianyin Pharmaceutical Co., Inc. to Present at the 2010 Rodman & Renshaw Annual China Investment Conference in Beijing on March 9 5
(Date:2/18/2015)... 18, 2015  Cepheid (NASDAQ: CPHD ) today ... conferences, and invited investors to participate via webcast. , ... Tuesday, March 3, 2015 at 11.20 a.m. Eastern ... Orlando, FL Wednesday, March 4, 2015 at 10.25 ... the live webcasts for these events, please visit Cepheid,s website ...
(Date:2/10/2015)... -- Alere Inc. (NYSE: ALR), a global leader in ... quarter ended December 31, 2014. Namal ... said, "We made substantial progress in the fourth ... in rapid diagnostics and delivering against our financial ... early January enabled us to substantially reduce our ...
(Date:2/5/2015)... --NXT-ID, Inc. (NASDAQ: NXTD and NXTDW) ... on the growing mobile commerce market, announces the launch ... part of its 2015 marketing and branding initiatives for ... consumer website for Wocketwallet.com earlier this month. ... "Our new corporate website naturally showcases our premiere consumer ...
Breaking Biology News(10 mins):Cepheid to Webcast Upcoming Financial Presentations 2Alere Inc. Announces Fourth Quarter 2014 Results 2Alere Inc. Announces Fourth Quarter 2014 Results 3Alere Inc. Announces Fourth Quarter 2014 Results 4Alere Inc. Announces Fourth Quarter 2014 Results 5Alere Inc. Announces Fourth Quarter 2014 Results 6Alere Inc. Announces Fourth Quarter 2014 Results 7Alere Inc. Announces Fourth Quarter 2014 Results 8Alere Inc. Announces Fourth Quarter 2014 Results 9Alere Inc. Announces Fourth Quarter 2014 Results 10Alere Inc. Announces Fourth Quarter 2014 Results 11Alere Inc. Announces Fourth Quarter 2014 Results 12Alere Inc. Announces Fourth Quarter 2014 Results 13Alere Inc. Announces Fourth Quarter 2014 Results 14Alere Inc. Announces Fourth Quarter 2014 Results 15Alere Inc. Announces Fourth Quarter 2014 Results 16Alere Inc. Announces Fourth Quarter 2014 Results 17Alere Inc. Announces Fourth Quarter 2014 Results 18Alere Inc. Announces Fourth Quarter 2014 Results 19Alere Inc. Announces Fourth Quarter 2014 Results 20Alere Inc. Announces Fourth Quarter 2014 Results 21Alere Inc. Announces Fourth Quarter 2014 Results 22Alere Inc. Announces Fourth Quarter 2014 Results 23Alere Inc. Announces Fourth Quarter 2014 Results 24Alere Inc. Announces Fourth Quarter 2014 Results 25Alere Inc. Announces Fourth Quarter 2014 Results 26Alere Inc. Announces Fourth Quarter 2014 Results 27Alere Inc. Announces Fourth Quarter 2014 Results 28Alere Inc. Announces Fourth Quarter 2014 Results 29Alere Inc. Announces Fourth Quarter 2014 Results 30Alere Inc. Announces Fourth Quarter 2014 Results 31Alere Inc. Announces Fourth Quarter 2014 Results 32Alere Inc. Announces Fourth Quarter 2014 Results 33Alere Inc. Announces Fourth Quarter 2014 Results 34Alere Inc. Announces Fourth Quarter 2014 Results 35
... YORK , Dec. 3, 2013 Usernames and passwords ... public domains from unwarranted access. Yet, identity theft and corporate ... can be easily spoofed. Today, biometrics veteran Hector Hoyos ... aims to address and solve the issues of secure identity ...
... to the Arctic, as part of the Catlin Arctic Survey, ... just beneath the ocean surface are likely to battle for ... that copepods that move large distances, migrating vertically across a ... surviving. The increasing level of carbon dioxide in ...
... Arts and Sciences has developed a system of techniques ... a protected marine mammal habitat. The techniques are the ... Bulletin , focusing on the bottlenose dolphin population in ... in the Department of Biology, co-authored the article with ...
Cached Biology News:Hoyos Labs, a Digital Infrastructure Security Company, Launches; Rethinks How We Authenticate and Secure Identity 2Hoyos Labs, a Digital Infrastructure Security Company, Launches; Rethinks How We Authenticate and Secure Identity 3Arctic study shows key marine food web species at risk from increasing CO2 2SU biologist develops method for monitoring shipping noise in dolphin habitat 2
Application: for RNase- decontamination , Registered Trademark of Ambion. ,Special grade: for molecular biology Density: 1.00 g/mL (20 C) Suitab tst: RNase decontamination in accordance...
... cleaning agent for removing RNase ... and pipettors. It is ... contamination from microcentrifuge tubes without ... Zap (R) is ...
Mol wt: average mol wt12,360.96 Da by calculation...
... is part of a series of media originally ... Weiss et al. for the large scale propagation ... medium is primarily used for the growth and ... the propagation of viruses in these cell lines. ...
Biology Products: