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:3/30/2015)... 2015 Richmond Pharmacology nimmt ... Pharmacology ist das erste Zentrum weltweit, das in ... Hospital in London in ... Studienversuche an einem Patienten begonnen hat. Das Therapeutikum ... entwickelt (ATTR), einer seltenen Herz- und Nervenkrankheit. ...
(Date:3/29/2015)... March 29, 2015  Caris Life Sciences® today ... Caris Molecular Intelligence®, the company,s panomic, comprehensive tumor ... between several rare and difficult to treat gynecological ... the potential to improve patient outcomes. These studies ... the Society of Gynecologic Oncology (SGO) 2015 Annual ...
(Date:3/29/2015)... 29, 2015 Caris Life Sciences® ... data showing the presence of PD-1 and ... samples. Using Caris Molecular Intelligence®, the company,s ... expression of programmed cell death protein-1 (PD-1) ... while its ligand (PD-L1) expression was variable ...
(Date:3/27/2015)... (PRWEB) March 27, 2015 Earlier this ... the promotion of hair regrowth in adult men and ... I-II or Norwood Hamilton classifications of IIa-V and Fitzpatrick ... industry plagued by products that over-promise and under-deliver, FDA ... renewing faith and confidence among more than 80 million ...
Breaking Biology Technology:Caris Molecular Intelligence Facilitates Comparison of Biomarker Profiles to Inform Targeted Treatment Strategies in Distinct Gynecological Cancers 2Caris Molecular Intelligence Facilitates Comparison of Biomarker Profiles to Inform Targeted Treatment Strategies in Distinct Gynecological Cancers 3Caris Molecular Intelligence Facilitates Comparison of Biomarker Profiles to Inform Targeted Treatment Strategies in Distinct Gynecological Cancers 4Caris Life Sciences' Multiplatform Tumor Profiling Technology Identifies Expression of PD-1 and PD-L1 in Gynecologic Malignancies 2Caris Life Sciences' Multiplatform Tumor Profiling Technology Identifies Expression of PD-1 and PD-L1 in Gynecologic Malignancies 3Caris Life Sciences' Multiplatform Tumor Profiling Technology Identifies Expression of PD-1 and PD-L1 in Gynecologic Malignancies 4Dr. Robert Leonard Applauds FDA Clearance of Capillus272Pro™ Hair Loss Laser Cap 2
... Tiger and Jacky tip shapes,stand out in Terumo,s newest ... Terumo Interventional Systems announces the launch of Optitorque(TM), ... Tiger and,Jacky tip shapes designed and cleared specifically for ... "The Optitorque catheters, specially designed for radial approach, will,help ...
... biofuel market is estimated at 33 billion with a double digit ... biodiesel. Bioethanol is produced and consumed mainly in Brazil and North ... biodiesel production and this fuel represents about ¾ of the European ... ...
... PLYMOUTH MEETING, Pa., Dec. 1 /PRNewswire-Asia-FirstCall/ -- BMP Sunstone,Corporation ... "Company") today announced,that the company will attend the 20th ... The 20th Annual Piper Jaffray Health ... to Wednesday, December 3, 2008, at the New York,Palace ...
Cached Biology Technology:Terumo Interventional Systems Launches a Complete Line of Coronary Diagnostic Catheters 2Terumo Interventional Systems Launches a Complete Line of Coronary Diagnostic Catheters 3CBDM.T, the Market and Business Intelligence Company Reviews the Biofuel Market 2CBDM.T, the Market and Business Intelligence Company Reviews the Biofuel Market 3CBDM.T, the Market and Business Intelligence Company Reviews the Biofuel Market 4
(Date:3/12/2015)... FAIRFAX, Va. , March 12, 2015 ... company and a member of the Texas Instruments Design ... Chandrababu Naidu has demonstrated its IriShield USB MK2120U ... iris scanning facility for pension distribution. ... and assembled to be marketed in India ...
(Date:3/12/2015)... March 12, 2015 Beta ... identity and access management (IAM) solution for a ... With Beta System,s new IAM package, customers benefit ... gleaned from multiple IAM implementations across different industries. ... as well as any necessary services and consulting. ...
(Date:3/11/2015)... DUBLIN , Mar. 11, 2015 Research and ... addition of the "Access Control Market by Product, ... to 2020" report to their offering. , ... is expected to reach $10.4 billion by 2020, with ... control market report covers the products types such as ...
Breaking Biology News(10 mins):Indian States See IriTech's Scanner Bolstering Efficiency of Authentication for Aadhaar 2Indian States See IriTech's Scanner Bolstering Efficiency of Authentication for Aadhaar 3Beta Systems Fast Forward IAM Available Now: a Standardized IAM Package at a Fixed Price 2Global Access Control (Cards & Readers, Biometrics, Controllers, Management Software) Market 2015-2020 - Analysis of the $10 Billion Market 2
... Miquel Crusafont Catalan Palaeontology Institute has for the first time ... de Narg archaeological site in Lleida, Spain. Up until now, ... the region. , The archaeological site in Coll de Narg ... of the town that bears the same name in the ...
... from Boston University School of Medicine (BUSM) reveals that ... through two specific mechanisms. The study, published in the ... indicates the importance of continuing to explore B cells ... Nikolajczyk, PhD, associate professor of microbiology at BUSM, is ...
... is the causative agent of listeriosisa debilitating disease ... per annum in the US alone. A characteristic feature ... grow at refrigeration temperatures and in the presence of ... the growth of most other pathogens. Work in ...
Cached Biology News:4 dinosaur egg species identified in Lleida 2BUSM study reveals therapeutic targets to alter inflammation, type 2 diabetes 2Sleator lab identifies single point mutation in Listeria monocytogenes 2
... The Experion Pro260 analysis kit for 10 ... to perform protein analysis with the Experion ... Pro260 microfluidic chips, 3 x 520 microliters ... microliters Pro260 ladder (10-260 kD), 400 microliters ...
Caliper offers a wide array of standard LabChip products designed to be used in combination with our AMS 90 and LabChip 3000 microfluidic platforms....
... fast and reliable automation for today's ... development laboratories. Staccato Mini-Workstations offer the ... basic liquid handling and material management ... either Caliper's time proven CLARA™ assay ...
Experion StdSens chips are the microfluidic chips used to perform standard-sensitivity RNA analysis (nanogram levels) with the Experion automated electrophoresis system. Each chip has the capacity to...
Biology Products: