Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > News > Porphyrin and carbon nanotube assemblies in polar solvents

January 2nd, 2008

Porphyrin and carbon nanotube assemblies in polar solvents

Abstract:
One of the chief obstacles to exploiting the useful electronic and materials properties of single-wall carbon nanotubes (SWCNTs) is their inclination to form ropes and bundles. Understanding the reaction paths involved in the transition from isolated SWCNTs to bundles in the presence of solvent is basic to controlling the process. Single- and multiple-wall carbon nanotubes (CNTs) in polar, or charged, solvents can also form aggregate assemblies and macromolecular complexes with porphyrin derivatives. This potential is of great interest, as the structural and optical properties of porphyrin derivatives and complexes can be easily engineered, a reality evident not just in the laboratory but also in nature. Indeed, in photosynthesis and other processes, the quantum mechanisms governing charge and energy transfer processes are fundamental to life.

Recent experiments investigating CNTs in amide solvents have led to the debatable conclusion that dispersion and partial debundling can be achieved at low nanotube concentrations with a variety of highly polar solvents possessing high surface tension.1 Among these, N-methylpyrrolidone (NMP) is considered to be the most effective. In particular, it has been postulated that at very low concentrations, the equilibrium (stable) state is a debundled one. Moreover, whether dispersion occurs appears to depend strongly on the method of sample preparation. Taken together, these results suggest that the debundled state is, in fact, not in equilibrium but is metastable (transient though relatively long-lived).

Source:
spie.org

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

Chemistry

Creating new materials with quantum effects for electronics January 29th, 2015

Anti-microbial coatings with a long-term effect for surfaces – presentation at nano tech 2015 in Japan January 21st, 2015

Hydrogels deliver on blood-vessel growth: Rice researchers introduce improved injectable scaffold to promote healing January 20th, 2015

Graphene enables all-electrical control of energy flow from light emitters: First signatures of graphene plasmons at telecommunications wavelength revealed January 20th, 2015

Nanotubes/Buckyballs

Chromium-centered cycloparaphenylene rings for making functionalized nanocarbons January 26th, 2015

GS7 Graphene Sensor maybe Solution in Fight Against Cancer January 25th, 2015

Toyocolor to Launch New Carbon Nanotube Materials at nano tech 2015 January 24th, 2015

Carbon nanotube finding could lead to flexible electronics with longer battery life January 14th, 2015

Discoveries

Creating new materials with quantum effects for electronics January 29th, 2015

Los Alamos Develops New Technique for Growing High-Efficiency Perovskite Solar Cells: Researchers’ crystal-production insights resolve manufacturing difficulty January 29th, 2015

Iranian Scientists Use MOFs to Eliminate Dye Pollutants January 29th, 2015

Made-in-Singapore rapid test kit detects dengue antibodies from saliva: IBN's MedTech innovation simplifies diagnosis of infectious diseases January 29th, 2015

Announcements

Advantest to Exhibit at SEMICON Korea in Seoul, South Korea February 4-6 Showcasing Broad Portfolio of Semiconductor Products, Technologies and Solutions January 29th, 2015

Park Systems Announces Innovations in Bio Cell Analysis with the Launch of Park NX-Bio, the only 3-in-1 Imaging Nanoscale Tool Available for Life Science Researchers January 29th, 2015

2015 Nanonics Image Contest January 29th, 2015

Iranian Scientists Use MOFs to Eliminate Dye Pollutants January 29th, 2015

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE