Featured Research

from universities, journals, and other organizations

University Of Arkansas Researchers Find Effective Solvents For Nanocrystal Formation

Date:
July 15, 2002
Source:
University Of Arkansas
Summary:
University of Arkansas researchers have used new solvents to create safe, inexpensive, high-quality semiconductor nanocrystals for use in industry. Their work appears as a "Hot Paper" in the current issue of Angewandte Chemie, a leading international chemistry journal.

FAYETTEVILLE, Ark. -- University of Arkansas researchers have used new solvents to create safe, inexpensive, high-quality semiconductor nanocrystals for use in industry. Their work appears as a "Hot Paper" in the current issue of Angewandte Chemie, a leading international chemistry journal.

Related Articles


The article, authored by Xiaogang Peng, assistant professor of chemistry and biochemistry, and W. William Yu, postdoctoral research associate, was chosen as a "Hot Paper" for its importance in a rapidly evolving field of high current interest and appears as a communication in the journal.

In the article, the authors present a new approach for developing synthetic chemistry to produce high quality semiconductor nanocrystals. Because high quality nanocrystals are not readily available, the need for safe, simple, and inexpensive synthetic methods is of interest to scientists working in many different fields, including materials sciences, biomedical sciences, and the physical sciences.

In the past ten years, all relatively successful synthetic methods for creating semiconductor nanocrystals have been based on carefully selected coordinating solvents. The research of Peng and Yu shows that non-coordinating solvents make a better media for the synthesis of colloidal semiconductor nanocrystals.

"The molecules of the non-coordinating solvents are chemically inert to the metal ions and the resulting nanocrystals," said Peng. This means that scientists can "tune" the chemical binding status of the metal ions using binding elements in the non-coordinating solvents. Thus, the chemical reactivity of the metal ions can be fine-tuned to meet the desired balance between the nucleation--the stage generating seeds for the resulting nanocrsytals--and the growth of the seeds generated in the nucleation step.

This allows researchers better control over the formation of nanocrystals of uniform size. "Many properties of semiconductor nanocrystals, including their emission colors, are strongly size dependent," Peng said. "As a result, it is necessary to synthesize nanocrystals with nearly monodisperse size distribution in order to take full advantage of these novel materials."

The flexibility provided by this approach opens possibilities for developing "greener," cheaper and simpler synthetic schemes for producing important high quality nanocrystals.

Angewandte Chemie is the only journal in the field to have a stimulating mixture of review articles, highlights and short communications. The communications, which are selected by a review board of leading scientists, report on the latest research results, making the journal indispensable to the chemist who wants to stay well informed. The journal also regularly publishes Nobel lectures in chemistry and related fields.

The article is called "Formation of High Quality CdS and Other II-VI Semiconductor Nanocrystals in Non-Coordinating Solvents: Tunable Reactivity of Monomers."


Story Source:

The above story is based on materials provided by University Of Arkansas. Note: Materials may be edited for content and length.


Cite This Page:

University Of Arkansas. "University Of Arkansas Researchers Find Effective Solvents For Nanocrystal Formation." ScienceDaily. ScienceDaily, 15 July 2002. <www.sciencedaily.com/releases/2002/07/020711080927.htm>.
University Of Arkansas. (2002, July 15). University Of Arkansas Researchers Find Effective Solvents For Nanocrystal Formation. ScienceDaily. Retrieved October 23, 2014 from www.sciencedaily.com/releases/2002/07/020711080927.htm
University Of Arkansas. "University Of Arkansas Researchers Find Effective Solvents For Nanocrystal Formation." ScienceDaily. www.sciencedaily.com/releases/2002/07/020711080927.htm (accessed October 23, 2014).

Share This



More Matter & Energy News

Thursday, October 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

3D Printed Instruments Make Sweet Music in Sweden

3D Printed Instruments Make Sweet Music in Sweden

Reuters - Innovations Video Online (Oct. 23, 2014) Students from Lund University's Malmo Academy of Music are believed to be the world's first band to all use 3D printed instruments. The guitar, bass guitar, keyboard and drums were built by Olaf Diegel, professor of product development, who says 3D printing allows musicians to design an instrument to their exact specifications. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Chameleon Camouflage to Give Tanks Cloaking Capabilities

Chameleon Camouflage to Give Tanks Cloaking Capabilities

Reuters - Innovations Video Online (Oct. 22, 2014) Inspired by the way a chameleon changes its colour to disguise itself; scientists in Poland want to replace traditional camouflage paint with thousands of electrochromic plates that will continuously change colour to blend with its surroundings. The first PL-01 concept tank prototype will be tested within a few years, with scientists predicting that a similar technology could even be woven into the fabric of a soldiers' clothing making them virtually invisible to the naked eye. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Jet Sales Lift Boeing Profit 18 Pct.

Jet Sales Lift Boeing Profit 18 Pct.

Reuters - Business Video Online (Oct. 22, 2014) Strong jet demand has pushed Boeing to raise its profit forecast for the third time, but analysts were disappointed by its small cash flow. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Internet of Things Aims to Smarten Your Life

Internet of Things Aims to Smarten Your Life

AP (Oct. 22, 2014) As more and more Bluetooth-enabled devices are reaching consumers, developers are busy connecting them together as part of the Internet of Things. (Oct. 22) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins