Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Bismuth-catalyzed growth of tin sulfide nanotubes

Abstract:
Since the discovery of carbon nanotubes in the early 1990s, nanotubes and nanowires have been the focus of much scientific attention. Aside from carbon, nanotubes have since been made from various other materials.

Possible applications for these nanostructures range across many fields, including microelectronic circuits, sensors, and special light conductors and light-emitting nanotubes for displays. A research team headed by Wolfgang Tremel at the University of Mainz has now developed a new process for the production of tin sulfide nanotubes. As reported in the journal Angewandte Chemie, the researchers let the SnS2 tubes "grow" out of a drop of metal.

Bismuth-catalyzed growth of tin sulfide nanotubes

Germany | Posted on June 10th, 2009

Metal sulfides with a lamellar structure that form inorganic nanotubes are not a new concept. They are currently in use in medical technology, for fibers with ultrahigh tensile strength, in hydrogen storage, for rechargeable batteries, in catalysis, and in nanotechnology. One fundamental problem with the fabrication of sulfidic nanotubes is the need for high temperatures to make the planar layers bend and fuse into tubes. In addition, they must be trapped as unstable intermediates. In the case of tin disulfide, this is nearly impossible, however, because the compound decomposes at a significantly lower temperature.

The Mainz researchers thus implemented a different process for the production of tin disulfide nanotubes: they first used a vapor-liquid-solid (VLS) process, a method normally used in the production of semiconducting nanowires. Bismuth metal powder is mixed with tin sulfide nanoflakes and heated in a tube furnace under an argon stream. The reaction product is deposited at the cooler end of the tube.

Nanodroplets of bismuth are formed inside the oven; these act as local points of contact for the tin. In this way, the reaction partners become concentrated within the metal droplet, which then serves as the nucleus for growth of the nanotubes. "In this process, the metal drop is obtained as a sphere at the end of the tube, and the nanotubes grow out of the sphere like a hair out of a follicle," explains Tremel. "Catalysis by the metal droplet makes growth possible at low temperatures."

The new method allowed the scientists to produce nanotubes made of several SnS2 layers with few defects, diameters between 30 and 40 nm, and lengths between 100 and 500 nm.

Author: Wolfgang Tremel, Universität Mainz (Germany),

####

For more information, please click here

Contacts:
Prof. Dr. Wolfgang Tremel
Institute of Inorganic Chemistry and Analytical Chemistry
Room: 2222-03-104
Duesbergweg 10-14
Phone: +49 6131 39-25135
Fax: +49 6131 39-25605
tremel(at)uni-mainz.de

Copyright © Angewandte Chemie

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Atom-thick CCD could capture images: Rice University scientists develop two-dimensional, light-sensitive material December 20th, 2014

Oregon researchers glimpse pathway of sunlight to electricity: Collaboration with Lund University uses modified UO spectroscopy equipment to study 'maze' of connections in photoactive quantum dots December 19th, 2014

Instant-start computers possible with new breakthrough December 19th, 2014

Aculon Hires New Business Development Director December 19th, 2014

Iranian Scientists Use Nanotechnology to Increase Power, Energy of Supercapacitors December 18th, 2014

Chemistry

How does enzymatic pretreatment affect the nanostructure and reaction space of lignocellulosic biomass? December 18th, 2014

Display technology/LEDs/SS Lighting/OLEDs

Unraveling the light of fireflies December 17th, 2014

TCL Launches World’s Most Advanced TV in the World’s Largest Market: New Quantum Dot TVs with Color IQ™ Optics Deliver OLED-Quality Color at a Fraction of the Price December 15th, 2014

Dartmouth researchers create 'green' process to reduce molecular switching waste December 15th, 2014

Stacking two-dimensional materials may lower cost of semiconductor devices December 11th, 2014

Nanotubes/Buckyballs

A sponge-like molecular cage for purification of fullerenes December 15th, 2014

'Trojan horse' proteins used to target hard-to-reach cancers: Scientists at Brunel University London have found a way of targeting hard-to-reach cancers and degenerative diseases using nanoparticles, but without causing the damaging side effects the treatment normally brings December 11th, 2014

Detecting gases wirelessly and cheaply: New sensor can transmit information on hazardous chemicals or food spoilage to a smartphone December 8th, 2014

Green meets nano: Scientists at TU Darmstadt create multifunctional nanotubes using nontoxic materials December 3rd, 2014

Sensors

Promising new method for rapidly screening cancer drugs: UMass Amherst researchers invent fast, accurate new nanoparticle-based sensor system December 15th, 2014

Graphene Applied in Production of Recyclable Electrodes December 13th, 2014

Detecting gases wirelessly and cheaply: New sensor can transmit information on hazardous chemicals or food spoilage to a smartphone December 8th, 2014

Nanosensor to Detect Naproxen Drug Produced in Iran December 6th, 2014

Discoveries

Atom-thick CCD could capture images: Rice University scientists develop two-dimensional, light-sensitive material December 20th, 2014

Oregon researchers glimpse pathway of sunlight to electricity: Collaboration with Lund University uses modified UO spectroscopy equipment to study 'maze' of connections in photoactive quantum dots December 19th, 2014

Instant-start computers possible with new breakthrough December 19th, 2014

Iranian Scientists Use Nanotechnology to Increase Power, Energy of Supercapacitors December 18th, 2014

Announcements

Atom-thick CCD could capture images: Rice University scientists develop two-dimensional, light-sensitive material December 20th, 2014

Oregon researchers glimpse pathway of sunlight to electricity: Collaboration with Lund University uses modified UO spectroscopy equipment to study 'maze' of connections in photoactive quantum dots December 19th, 2014

Instant-start computers possible with new breakthrough December 19th, 2014

Aculon Hires New Business Development Director December 19th, 2014

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 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE