Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Scientists ’PAD’ their way to new metal-oxide film technology

17.12.2004


University of California scientists working with a researcher from Washington State University at Los Alamos National Laboratory’s Superconductivity Technology Center have developed a novel method for creating high performance, inorganic metal-oxide films using polymer-assisted deposition, or PAD. The breakthrough could pave the way for a greater use of metal-oxide films into the electronics manufacturing industry.



"The successful creation of both simple and complex metal-oxide films using PAD is part of the significance of this invention," said Dean Peterson, director of the Superconductivity Technology Center. "This technology provides a cost-effective approach to grow electronic and optical materials, which would find wide applications in any fields where the material is needed in the film form."

The PAD process uses a water-based solution to create a high-quality film of nearly any metal oxide. The films can be made from a single or several different metals with controlled atomic weight relationships. Amorphous, polycrystalline, or epitaxial films can be made with thicknesses from 10 nanometers to hundreds of nanometers or thicker. Using PAD, Los Alamos researchers have produced films of simple metal oxides, such as titanium dioxide and zinc oxide, and also complex metal oxides, such as strontium titanate and indium tin oxide.


Metal-oxides are emerging as technically important materials because of the wide variety of physical properties they possess, which make them attractive for applications such as photovoltaic devices, gas sensors, microelectronics and corrosion protection devices. However, the production of high-quality metal-oxide films with a desired chemical composition has been costly and challenging. Metal-oxide films are typically grown by physical or chemical-vapor deposition techniques that require a vacuum system. Both techniques deliver quality metal-oxide films, but the cost of deposition systems and the ability to coat films only on a flat surface have limited their potential applications. Chemical solution deposition methods, such as sol-gel, are less capital-intensive, but many metal-oxides cannot be deposited using this technique.

The PAD process distinguishes itself from other coating technologies because of its low cost and ability to coat large areas and irregular surfaces. The technique not only uses 100 percent of the source materials, but also has the capability to control the chemical phases, microstructures and physical properties of the materials deposited.

Bill Tumas, director of the Laboratory’s Institute for Hydrogen and Fuel Cell Research said, "Perhaps the most promising aspect of this new technology is the potential diversity of materials that can be readily made. PAD has the capability to enable the rapid exploration of a wide range of new materials."

The development of the PAD metal-oxide film coating technology involved the expertise of a number of Los Alamos scientists, including Quanxi Jia, Yuan Lin, Haiyan Wang and Stephen Foltyn from the Superconductivity Technology Center of the Materials Science and Technology Division, and Mark McCleskey, Anthony Burrell and Gavin Collis from the Chemistry Division. The team also included Alexander DeQuan Li from the Chemistry Department at Washington State University in Pullman, Wash.

Todd Hanson | EurekAlert!
Further information:
http://www.lanl.gov

More articles from Power and Electrical Engineering:

nachricht Scientists print sensors on gummi candy: creating microelectrode arrays on soft materials
21.06.2018 | Technische Universität München

nachricht Electron sandwich doubles thermoelectric performance
20.06.2018 | Hokkaido University

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Graphene assembled film shows higher thermal conductivity than graphite film

22.06.2018 | Materials Sciences

Fast rising bedrock below West Antarctica reveals an extremely fluid Earth mantle

22.06.2018 | Earth Sciences

Zebrafish's near 360 degree UV-vision knocks stripes off Google Street View

22.06.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>