Featured Research

from universities, journals, and other organizations

Recipe to fine-tune diameter of silica rods devised

Date:
December 16, 2013
Source:
Oak Ridge National Laboratory
Summary:
By controlling the temperature of silica rods as they grow, researchers could be setting the stage for advances in anti-reflective solar cells, computer monitors, TV screens, eye glasses and more.

By controlling the temperature of silica rods as they grow, researchers at the Department of Energy's Oak Ridge National Laboratory could be setting the stage for advances in anti-reflective solar cells, computer monitors, TV screens, eye glasses and more.

The goal of fabricating fixed-size one-dimensional silica structures and being able to precisely control the diameter during growth has long eluded scientists. Now, Panos Datskos and Jaswinder Sharma have demonstrated what they describe as the addressable local control of diameter of each segment of the silica rod.

"In nature, many intricate structures develop and grow in response to their environments," said Sharma, a Wigner Fellow and corresponding author of the Angewandte Chemie International Edition paper that outlines the process. "For example, in addition to genotype, shell shape is also controlled by the local environment in many oysters and scallops."

Taking a cue from nature, by manipulating the reaction temperature during growth, Sharma and co-author Datskos were able to control thickness while retaining control of each segment of the rod separately.

When the researchers increased growth temperatures, the segment diameter became smaller. By increasing incubation times, they obtained longer segments at the same temperature. Higher temperatures for the same incubation time produced longer segments of the glass-like silica rods.

It appears that the correlation between temperature and diameter is a result of the relationship between temperature and the size of the emulsion droplet, according to the authors, who discovered that the higher the temperature, the smaller the emulsion droplet.

The researchers envision this finding leading to further opportunities that require vertically aligned arrays of silica rods for gradually changing a refractive index on a large scale.


Story Source:

The above story is based on materials provided by Oak Ridge National Laboratory. Note: Materials may be edited for content and length.


Journal Reference:

  1. Panos Datskos, Jaswinder Sharma. Synthesis of Segmented Silica Rods by Regulation of the Growth Temperature. Angewandte Chemie International Edition, 2013; DOI: 10.1002/anie.201308140

Cite This Page:

Oak Ridge National Laboratory. "Recipe to fine-tune diameter of silica rods devised." ScienceDaily. ScienceDaily, 16 December 2013. <www.sciencedaily.com/releases/2013/12/131216154332.htm>.
Oak Ridge National Laboratory. (2013, December 16). Recipe to fine-tune diameter of silica rods devised. ScienceDaily. Retrieved August 23, 2014 from www.sciencedaily.com/releases/2013/12/131216154332.htm
Oak Ridge National Laboratory. "Recipe to fine-tune diameter of silica rods devised." ScienceDaily. www.sciencedaily.com/releases/2013/12/131216154332.htm (accessed August 23, 2014).

Share This




More Matter & Energy News

Saturday, August 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Is It a Plane? No, It's a Hoverbike

Is It a Plane? No, It's a Hoverbike

Reuters - Business Video Online (Aug. 22, 2014) UK-based Malloy Aeronautics is preparing to test a manned quadcopter capable of out-manouvering a helicopter and presenting a new paradigm for aerial vehicles. A 1/3-sized scale model is already gaining popularity with drone enthusiasts around the world, with the full-sized manned model expected to take flight in the near future. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Coal Gas Boom in China Holds Climate Risks

Coal Gas Boom in China Holds Climate Risks

AP (Aug. 22, 2014) China's energy revolution could do more harm than good for the environment, despite the country's commitment to reducing pollution and curbing its carbon emissions. (Aug. 22) Video provided by AP
Powered by NewsLook.com
Former TSA X-Ray Scanners Easily Tricked To Miss Weapons

Former TSA X-Ray Scanners Easily Tricked To Miss Weapons

Newsy (Aug. 21, 2014) Researchers found the scanners could be duped simply by placing a weapon off to the side of the body or encasing it under a plastic shield. Video provided by Newsy
Powered by NewsLook.com
Flower Power! Dandelions Make Car Tires?

Flower Power! Dandelions Make Car Tires?

Reuters - Business Video Online (Aug. 20, 2014) Forget rolling on rubber, could car drivers soon be traveling on tires made from dandelions? Teams of scientists are racing to breed a type of the yellow flower whose taproot has a milky fluid with tire-grade rubber particles in it. As Joanna Partridge reports, global tire makers are investing millions in research into a new tire source. Video provided by Reuters
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:
from the past week

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