Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Oregon chemists eye improved thin films with metal substitution: Solution-based inorganic process could drive more efficient electronics and solar devices

Maisha K. Kamunde-Devonish
Maisha K. Kamunde-Devonish

Abstract:
The yield so far is small, but chemists at the University of Oregon have developed a low-energy, solution-based mineral substitution process to make a precursor to transparent thin films that could find use in electronics and alternative energy devices.

Oregon chemists eye improved thin films with metal substitution: Solution-based inorganic process could drive more efficient electronics and solar devices

Eugene, OR | Posted on July 21st, 2014

A paper describing the approach is highlighted on the cover of the July 21 issue of the journal Inorganic Chemistry, which draws the most citations of research in the inorganic and nuclear chemistry fields. The paper was chosen by the American Chemical Society journal as an ACS Editor's Choice for its potential scientific and broad public interest when it initially published online.

The process described in the paper represents a new approach to transmetalation, in which individual atoms of one metal complex -- a cluster in this case -- are individually substituted in water. For this study, Maisha K. Kamunde-Devonish and Milton N. Jackson Jr., doctoral students in the Department of Chemistry and Biochemistry, replaced aluminum atoms with indium atoms.

The goal is to develop inorganic clusters as precursors that result in dense thin films with negligible defects, resulting in new functional materials and thin-film metal oxides. The latter would have wide application in a variety of electronic devices.

"Since the numbers of compounds that fit this bill is small, we are looking at transmetelation as a method for creating new precursors with new combinations of metals that would circumvent barriers to performance," Kamunde-Devonish said.

Components in these devices now use deposition techniques that require a lot of energy in the form of pressure or temperature. Doing so in a more green way -- reducing chemical waste during preparation -- could reduce manufacturing costs and allow for larger-scale materials, she said.

"In essence," said co-author Darren W. Johnson, a professor of chemistry, "we can prepare one type of nanoscale cluster compound, and then step-by-step substitute out the individual metal atoms to make new clusters that cannot be made by direct methods. The cluster we report in this paper serves as an excellent solution precursor to make very smooth thin films of amorphous aluminum indium oxide, a semiconductor material that can be used in transparent thin-film transistors."

Transmetalation normally involves a reaction done in organic chemistry in which the substitution of metal ions generates new metal-carbon bonds for use in catalytic systems and to synthesize new metal complexes.

"This is a new way to use the process," Kamunde-Devonish said, "Usually you take smaller building blocks and put them together to form a mix of your basic two or three metals. Instead of building a house from the ground up, we're doing some remodeling. In everyday life that happens regularly, but in chemistry it doesn't happen very often. We've been trying to make materials, compounds, anything that can be useful to improve the processes to make thin films that find application in a variety of electronic devices."

The process, she added, could be turned into a toolbox that allows for precise substitutions to generate specifically desired properties. "Currently, we can only make small amounts," she said, "but the fact that we can do this will allow us to get a fundamental understanding of how this process happens. The technology is possible already. It's just a matter of determining if this type of material we've produced is the best for the process."

The research was funded primarily through the National Science Foundation-funded Center for Sustainable Materials Chemistry (NSF grant CHE-1102637). It also was supported by the NSF-supported (grant CHE-0923589) NMR Spectroscopy Facility for analyses work done in the Center for Advanced Materials Characterization in Oregon (CAMCOR) located in the UO's Lorry I. Lokey Laboratories.

Co-authors with Kamunde-Devonish, Jackson and Johnson were former UO doctoral student Zachary L. Mensinger, now at the University of Minnesota at Morris, and Lev N. Zakharov of CAMCOR.

####

About University of Oregon
The University of Oregon is among the 108 institutions chosen from 4,633 U.S. universities for top-tier designation of "Very High Research Activity" in the 2010 Carnegie Classification of Institutions of Higher Education. The UO also is one of two Pacific Northwest members of the Association of American Universities.

For more information, please click here

Contacts:
Media Contact:
Jim Barlow
director of science and research communications
541-346-3481




Sources:
Maisha K. Kamunde-Devonish
doctoral student
541-346-7653


Darren W. Johnson
professor of chemistry
541-346-1695

Copyright © University of Oregon

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 Links

The paper (Transmetalation of Aqueous Inorganic Clusters: A Useful Route to the Synthesis of Heterometallic Aluminum and Indium Hydroxo—Aquo Clusters):

Johnson faculty page:

Department of Chemistry and Biochemistry:

CAMCOR:

Related News Press

News and information

NIST Puts the Optical Microscope Under the Microscope to Achieve Atomic Accuracy May 22nd, 2018

Magnesium magnificent for plasmonic applications: Rice University, University of Cambridge synthesize and test nanoparticles of abundant material May 22nd, 2018

Self-assembling 3D battery would charge in seconds May 22nd, 2018

Supersonic waves may help electronics beat the heat May 18th, 2018

Disability Can Be a Superpower in Space Disabled astronauts offer unique solutions to emergencies in space May 17th, 2018

Chemistry

Magnesium magnificent for plasmonic applications: Rice University, University of Cambridge synthesize and test nanoparticles of abundant material May 22nd, 2018

Salt boosts creation of 2-D materials: Rice University scientists show how salt lowers reaction temperatures to make novel materials April 18th, 2018

Thin films

Organic solar cells reach record efficiency, benchmark for commercialization April 23rd, 2018

High efficiency solar power conversion allowed by a novel composite material: A composite thin film developed at INRS improves significantly solar cells' power conversion efficiency April 10th, 2018

Researchers develop nanoparticle films for high-density data storage: April 3rd, 2018

Govt.-Legislation/Regulation/Funding/Policy

NIST Puts the Optical Microscope Under the Microscope to Achieve Atomic Accuracy May 22nd, 2018

Magnesium magnificent for plasmonic applications: Rice University, University of Cambridge synthesize and test nanoparticles of abundant material May 22nd, 2018

Self-assembling 3D battery would charge in seconds May 22nd, 2018

Supersonic waves may help electronics beat the heat May 18th, 2018

Chip Technology

Supersonic waves may help electronics beat the heat May 18th, 2018

Deeper understanding of quantum chaos may be the key to quantum computers May 16th, 2018

Strain improves performance of atomically thin semiconductor material May 11th, 2018

A designer's toolkit for constructing complex nanoparticles May 5th, 2018

Discoveries

NIST Puts the Optical Microscope Under the Microscope to Achieve Atomic Accuracy May 22nd, 2018

Magnesium magnificent for plasmonic applications: Rice University, University of Cambridge synthesize and test nanoparticles of abundant material May 22nd, 2018

Self-assembling 3D battery would charge in seconds May 22nd, 2018

Supersonic waves may help electronics beat the heat May 18th, 2018

Announcements

NIST Puts the Optical Microscope Under the Microscope to Achieve Atomic Accuracy May 22nd, 2018

Magnesium magnificent for plasmonic applications: Rice University, University of Cambridge synthesize and test nanoparticles of abundant material May 22nd, 2018

Self-assembling 3D battery would charge in seconds May 22nd, 2018

Supersonic waves may help electronics beat the heat May 18th, 2018

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

NIST Puts the Optical Microscope Under the Microscope to Achieve Atomic Accuracy May 22nd, 2018

Magnesium magnificent for plasmonic applications: Rice University, University of Cambridge synthesize and test nanoparticles of abundant material May 22nd, 2018

Self-assembling 3D battery would charge in seconds May 22nd, 2018

Supersonic waves may help electronics beat the heat May 18th, 2018

Energy

Team achieves two-electron chemical reactions using light energy, gold May 15th, 2018

Hematene joins parade of new 2D materials: Rice University-led team extracts 3-atom-thick sheets from common iron oxide May 8th, 2018

A designer's toolkit for constructing complex nanoparticles May 5th, 2018

Scientists Pinpoint Energy Flowing Through Vibrations in Superconducting Crystals: Interactions between electrons and the atomic structure of high-temperature superconductors impacted by elusive and powerful vibrations May 4th, 2018

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project