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 July 31, 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 July 31, 2014).

Share This




More Matter & Energy News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Britain Testing Driverless Cars on Roadways

Britain Testing Driverless Cars on Roadways

AP (July 30, 2014) British officials said on Wednesday that driverless cars will be tested on roads in as many as three cities in a trial program set to begin in January. Officials said the tests will last up to three years. (July 30) Video provided by AP
Powered by NewsLook.com
Amid Drought, UCLA Sees Only Water

Amid Drought, UCLA Sees Only Water

AP (July 30, 2014) A ruptured 93-year-old water main left the UCLA campus awash in 8 million gallons of water in the middle of California's worst drought in decades. (July 30) Video provided by AP
Powered by NewsLook.com
Smartphone Powered Paper Plane Debuts at Airshow

Smartphone Powered Paper Plane Debuts at Airshow

AP (July 30, 2014) Smartphone powered paper airplane that was popular on crowdfunding website KickStarter makes its debut at Wisconsin airshow (July 30) Video provided by AP
Powered by NewsLook.com
U.K. To Allow Driverless Cars On Public Roads

U.K. To Allow Driverless Cars On Public Roads

Newsy (July 30, 2014) Driverless cars could soon become a staple on U.K. city streets, as they're set to be introduced to a few cities in 2015. Video provided by Newsy
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