Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Tubules "grown" from droplets: Bismuth-catalyzed growth of tin disulfide nanotubes

TEM images of nanotubes obtained when bulk SnS2 (a) and bulk SnS (b, c) were used as precursors for the synthesis of SnS2 nanotubes.
©: Angewandte Chemie, Wiley-VCH-Verlag
TEM images of nanotubes obtained when bulk SnS2 (a) and bulk SnS (b, c) were used as precursors for the synthesis of SnS2 nanotubes. ©: Angewandte Chemie, Wiley-VCH-Verlag

Abstract:
Since the discovery of carbon nanotubes in the early 1990s, nanotubes and nanowires have been the focus of scientific and technological interest. It has since also proved possible to produce these tiny structures from materials other than carbon. Possible applications range across many areas, including microelectronic circuits, sensor technology, and special fibre optics and light-emitting nanotubes for displays. A team of researchers led by Wolfgang Tremel at Johannes Gutenberg University Mainz have now developed a new technique for producing tin disulfide nanotubes. According to the report published in the journal Angewandte Chemie, the scientists have found a way of 'growing' SnS2 tubules from a metal droplet.

Tubules "grown" from droplets: Bismuth-catalyzed growth of tin disulfide nanotubes

Germany | Posted on June 18th, 2009

It is not a new concept that metal sulfides with a lamellar structure will form nano-tubes. These are currently employed in medical devices, as fibres with extremely high tensile strength, in hydrogen storage, for rechargeable batteries, in catalysis, and in nanotechnological applications. However, a major problem associated with the synthesis of sulfide-based nanotubes is that high temperatures are required for the planar structures to be induced to bend to form cylinders. In addition, these unstable intermediate products must be trapped. This is nearly impossible in the case of tin disulfide, as the nanotube collapses already at significantly lower temperatures.

The team of researchers at Mainz University therefore implemented an alternative method for the production of tin disulfide nanotubes: They first used the vapour-liquid-solid (VLS) process, a technique more commonly used to produce semicon-ductor nanowires. Bismuth powder is combined with tin disulfide nanoflakes, and the mixture is heated in a tube furnace under an argon gas flow. The product of the reaction is deposited at the cooler end.

Nanodroplets of bismuth are formed in the furnace, and these act as local collec-tion points for tin. In this manner, the reaction partners accumulate in the metal droplets, providing the raw material from which nanotubes can be grown. Tremel explains: "In this process, the metal droplets are retained in the form of spheres at the end of the tubes, while the nanotubes grow out of them like hairs from follicles. And thanks to the catalytic effect provided by the metal droplets, it is possible to grow nanotubes even at relatively low temperatures."

Using the new technique, the team has been able to produce perfect nanotubes with diameters in a range of 30 - 40 nm and lengths of 100 - 500 nm consisting of several layers of SnS2.

####

For more information, please click here

Copyright © Johannes Gutenberg-Universität Mainz

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

New Biological Nano-Fertilizers Presented in Iran as Appropriate Replacements for Chemical Fertilizers April 18th, 2015

Iranian Foodstuff, Agricultural Industries Welcome Nanotechnology Packaging Bags April 18th, 2015

Nanocomposites Play Effective Role in Production of Smart Fibers April 18th, 2015

Dais Analytic Corporation Appoints Eliza Wang to Board of Directors: Company's Newest Director Brings Expertise in Commercial and Legal Matters Both in the United States and China; Joins on the Heels of Successful Business Development Trade Mission to China April 18th, 2015

Nanotubes/Buckyballs

Nanotubes with two walls have singular qualities: Rice University lab calculates unique electronic qualities of double-walled carbon nanotubes April 16th, 2015

MIT sensor detects spoiled meat: Tiny device could be incorporated into 'smart packaging' to improve food safety April 15th, 2015

Taking aircraft manufacturing out of the oven: New technique uses carbon nanotube film to directly heat and cure composite materials April 14th, 2015

Iranian Scientists Evaluate Dynamic Interaction between 2 Carbon Nanotubes April 14th, 2015

Discoveries

Optical resonance-based biosensors designed for medical applications April 18th, 2015

Iranian Foodstuff, Agricultural Industries Welcome Nanotechnology Packaging Bags April 18th, 2015

Nanocomposites Play Effective Role in Production of Smart Fibers April 18th, 2015

Protein Building Blocks for Nanosystems: Scientists develop method for producing bio-based materials with new properties April 17th, 2015

Materials/Metamaterials

The National Science Foundation names engineering researcher Andrea Alú its Alan T. Waterman awardee for 2015: Alú is a pioneer in the field of metamaterials who has developed "cloaking" technology to make objects invisible to sensors April 16th, 2015

Cobalt film a clean-fuel find: Rice University discovery is efficient, robust at drawing hydrogen and oxygen from water April 15th, 2015

Combined effort for structural determination April 15th, 2015

Harvesting energy from electromagnetic waves: In the future, clean alternatives such as harvesting energy from electromagnetic waves may help ease the world's energy shortage April 15th, 2015

Announcements

New Biological Nano-Fertilizers Presented in Iran as Appropriate Replacements for Chemical Fertilizers April 18th, 2015

Iranian Foodstuff, Agricultural Industries Welcome Nanotechnology Packaging Bags April 18th, 2015

Nanocomposites Play Effective Role in Production of Smart Fibers April 18th, 2015

Dais Analytic Corporation Appoints Eliza Wang to Board of Directors: Company's Newest Director Brings Expertise in Commercial and Legal Matters Both in the United States and China; Joins on the Heels of Successful Business Development Trade Mission to China April 18th, 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