Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Method Safely Deposits Novel Metal Oxide Thin Films on Substrates

Chemist James Garvey has developed a way to deposit metal oxide onto a polymeric substrate, as shown in this scanning electron microscope image, magnified 30,000 times.
Chemist James Garvey has developed a way to deposit metal oxide onto a polymeric substrate, as shown in this scanning electron microscope image, magnified 30,000 times.

Abstract:
University at Buffalo chemists have developed a novel way to grow chemically pure, zinc oxide thin films characterized by dense, bristle-like nanostructures and a new method for depositing them on temperature-sensitive substrates, including polymers, plastics and tapes.

Method Safely Deposits Novel Metal Oxide Thin Films on Substrates

Buffalo, NY | Posted on September 11th, 2007

The research, published online last month in the Journal of Physical Chemistry, may make possible the deposition of versatile zinc oxide films onto flexible surfaces, enabling the development of more efficient solar cells, liquid-crystal displays, chemical sensors and optoelectronic devices.

The issue of the journal commemorates the career of Richard E. Smalley, a pioneer of nanotechnology, with whom the lead UB author, James F. Garvey, Ph.D., professor of chemistry, worked while on sabbatical in 1995.

High-quality zinc oxide thin films are versatile and can be fabricated into many shapes, including films, nanorods and nanoparticles. However, there is a drawback: They usually are deposited at high temperatures, which can damage or even melt the substrate they are coating.

"That makes it impossible to coat plastic, a hard drive, an electronic device or even contact lenses since the deposition process damages the underlying surface," Garvey said.

By contrast, the UB researchers have developed a technique in which the metal oxide molecules are cool enough to safely coat temperature-sensitive substrates.

The UB researchers grow the thin films by first reacting zinc metal and oxygen in the presence of a high power, electrical arc discharge.

The method they developed, called Pulsed Arc Molecular Beam Deposition (PAMBD), strikes a discharge between two pure zinc rods.

"This lightening-like discharge creates a bright, blue plasma five times hotter than the surface of the sun," Garvey said.

At these high temperatures, the pure zinc metal is vaporized and reacts completely with an oxygen gas pulse to create chemically zinc oxide molecules.

The gaseous zinc oxide is then sprayed through a tiny aperture, a process that results in cooling the expanding gas down to about 50 degrees Kelvin, he explained, allowing the beam of now cold metal oxides to safely coat even the most temperature-sensitive surfaces.

"This is an enabling technology that will allow for the deposition of thin films on batteries, credit cards, on any flexible surface you have," Garvey said, adding that the UB process can use any metal and a wide array of different metal oxides can be produced easily.

"Since it is a pulsed technique, the thickness of the resulting films can be precisely controlled," he noted. "In this way, our PAMBD source is really a high-temperature chemical reactor that generates metal oxide molecules on demand and then rapidly cools them down for subsequent coating of any surface."

The chemists now are working with researchers in the UB Department of Physics to use the thin films and the deposition technique to create nanorods and spintronic devices.

In addition to Garvey, co-authors on the paper are Chi-Tung Chiang, Ph.D., post-doctoral associate, and Robert L. DeLeon, Ph.D., adjunct associate professor, both in the Department of Chemistry in the UB College of Arts and Sciences.

The research was funded by the Missile Defense Agency of the U.S. Department of Defense.

####

About University at Buffalo
The University at Buffalo is a premier research-intensive public university, the largest and most comprehensive campus in the State University of New York. UB's more than 27,000 students pursue their academic interests through more than 300 undergraduate, graduate and professional degree programs. Founded in 1846, the University at Buffalo is a member of the Association of American Universities.

For more information, please click here

Contacts:
Ellen Goldbaum

716-645-5000 ext 1415

Copyright © University at Buffalo

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

Discoveries

QuantumWise guides the semiconductor industry towards the atomic scale October 24th, 2014

Iranian, Malaysian Scientists Study Nanophotocatalysts for Water Purification October 23rd, 2014

Nanoparticle technology triples the production of biogas October 23rd, 2014

Strengthening thin-film bonds with ultrafast data collection October 23rd, 2014

Materials/Metamaterials

Iran to Hold 3rd Int'l Engineering Materials, Metallurgy Conference October 25th, 2014

Researchers patent a nanofluid that improves heat conductivity October 22nd, 2014

Materials for the next generation of electronics and photovoltaics: MacArthur Fellow develops new uses for carbon nanotubes October 21st, 2014

Super stable garnet ceramics may be ideal for high-energy lithium batteries October 21st, 2014

Announcements

Iran to Hold 3rd Int'l Engineering Materials, Metallurgy Conference October 25th, 2014

Haydale Secures Exclusive Development and Supply Agreement with Tantec A/S: New reactors to be built and commissioned by Tantec A/S represent another step forward towards the commercialisation of graphene October 24th, 2014

QuantumWise guides the semiconductor industry towards the atomic scale October 24th, 2014

Strengthening thin-film bonds with ultrafast data collection October 23rd, 2014

Military

NanoTechnology for Defense (NT4D) October 22nd, 2014

Crystallizing the DNA nanotechnology dream: Scientists have designed the first large DNA crystals with precisely prescribed depths and complex 3D features, which could create revolutionary nanodevices October 20th, 2014

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

1980s aircraft helps quantum technology take flight October 20th, 2014

Grants/Awards/Scholarships/Gifts/Contests/Honors/Records

Special UO microscope captures defects in nanotubes: University of Oregon chemists provide a detailed view of traps that disrupt energy flow, possibly pointing toward improved charge-carrying devices October 21st, 2014

Crystallizing the DNA nanotechnology dream: Scientists have designed the first large DNA crystals with precisely prescribed depths and complex 3D features, which could create revolutionary nanodevices October 20th, 2014

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

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