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

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Design of micro and nanoparticles to improve treatments for Alzheimers and Parkinsons: At the Faculty of Pharmacy of the UPV/EHU-University of the Basque Country encapsulation techniques are being developed to deliver correctly and effectively certain drugs October 20th, 2014

Physicists build reversible laser tractor beam October 20th, 2014

Removal of Limitations of Composites at Superheat Temperatures October 20th, 2014

Chemistry

Non-Toxic Nanocatalysts Open New Window for Significant Decrease in Reaction Process October 19th, 2014

QD Vision Wins Prestigious Presidential Green Chemistry Challenge Award from the U.S. Environmental Protection Agency October 16th, 2014

Unique catalysts for hydrogen fuel cells synthesized in ordinary kitchen microwave oven October 14th, 2014

Display technology/LEDs/SS Lighting/OLEDs

QD Vision Wins Prestigious Presidential Green Chemistry Challenge Award from the U.S. Environmental Protection Agency October 16th, 2014

Beyond LEDs: Brighter, new energy-saving flat panel lights based on carbon nanotubes - Planar light source using a phosphor screen with highly crystalline single-walled carbon nanotubes (SWCNTs) as field emitters demonstrates its potential for energy-efficient lighting device October 14th, 2014

Aledia’s Nanowire LED Technology Endorsed By 2014 Physics Nobel Prize Winner: Hiroshi Amano Serves on Company’s Scientific Advisory Board October 13th, 2014

Nanotubes/Buckyballs

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Beyond LEDs: Brighter, new energy-saving flat panel lights based on carbon nanotubes - Planar light source using a phosphor screen with highly crystalline single-walled carbon nanotubes (SWCNTs) as field emitters demonstrates its potential for energy-efficient lighting device October 14th, 2014

NTU develops ultra-fast charging batteries that last 20 years October 14th, 2014

Fast, cheap nanomanufacturing: Arrays of tiny conical tips that eject ionized materials could fabricate nanoscale devices cheaply October 4th, 2014

Sensors

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Graphenea opens US branch October 16th, 2014

IRLYNX and CEA-Leti to Streamline New CMOS-based Infrared Sensing Modules Dedicated to Human-activities Characterization October 15th, 2014

Nanodevices for clinical diagnostic with potential for the international market: The development is based on optical principles and provides precision and allows saving vital time for the patient October 15th, 2014

Discoveries

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Design of micro and nanoparticles to improve treatments for Alzheimers and Parkinsons: At the Faculty of Pharmacy of the UPV/EHU-University of the Basque Country encapsulation techniques are being developed to deliver correctly and effectively certain drugs October 20th, 2014

Physicists build reversible laser tractor beam October 20th, 2014

Removal of Limitations of Composites at Superheat Temperatures October 20th, 2014

Announcements

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Design of micro and nanoparticles to improve treatments for Alzheimers and Parkinsons: At the Faculty of Pharmacy of the UPV/EHU-University of the Basque Country encapsulation techniques are being developed to deliver correctly and effectively certain drugs October 20th, 2014

Physicists build reversible laser tractor beam October 20th, 2014

Removal of Limitations of Composites at Superheat Temperatures October 20th, 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