Featured Research

from universities, journals, and other organizations

Physicists quantify temperature changes in metal nanowires

Date:
January 21, 2014
Source:
University of Arkansas, Fayetteville
Summary:
Physicists have demonstrated the capability of measuring temperature changes in very small 3-D regions of space.

Using the interaction between light and charge fluctuations in metal nanostuctures called plasmons, physicist have demonstrated the capability of measuring temperature changes in very small 3-D regions of space.

Plasmons can be thought of as waves of electrons in a metal surface, said Joseph B. Herzog, visiting assistant professor of physics at the University of Arkansas, who co-authored a paper detailing the findings that was published Jan. 1 by the journal Nano Letters, a publication of the American Chemical Society.

The paper, titled "Thermoplasmonics: Quantifying Plasmonic Heating in Single Nanowires," was co-written by Rice University researchers Mark W. Knight and Douglas Natelson.

In the experiments, Herzog fabricated plasmonic nanostructures with electron beam lithography and precisely focused a laser on to a gold nanowire with a scanning optical setup.

"This work measures the change in electrical resistance of a single gold nanowire while it is illuminated with light," Herzog said. "The change in resistance is related to the temperature change of the nanowire. Being able to measure temperature changes at small nanoscale volumes can be difficult, and determining what portion of this temperature change is due to plasmons can be even more challenging.

"By varying the polarization of the light incident on the nanostructures, the plasmonic contribution of the optical heating has been determined and confirmed with computational modeling," he said.

Herzog's publication is in a rapidly growing, specialized area called thermoplasmonics, a sub-field of plasmonics that studies the effects of heat due to plasmons and has been used in applications ranging from cancer treatment to solar energy harvesting.

Herzog combines his research of plasmons with his expertise in nano-optics, which is the nanoscale study of light.

"It's a growing field," he said. "Nano-optics and plasmonics allow you to focus light into smaller regions that are below the diffraction limit of light. A plasmonic nanostructure is like an optical antenna. The plasmon-light interaction makes plasmonics fascinating."


Story Source:

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


Journal Reference:

  1. Joseph Bruce Herzog, Mark W. Knight, Douglas Natelson. Thermoplasmonics: Quantifying Plasmonic Heating in Single Nanowires. Nano Letters, 2014; 140101181917003 DOI: 10.1021/nl403510u

Cite This Page:

University of Arkansas, Fayetteville. "Physicists quantify temperature changes in metal nanowires." ScienceDaily. ScienceDaily, 21 January 2014. <www.sciencedaily.com/releases/2014/01/140121113322.htm>.
University of Arkansas, Fayetteville. (2014, January 21). Physicists quantify temperature changes in metal nanowires. ScienceDaily. Retrieved July 30, 2014 from www.sciencedaily.com/releases/2014/01/140121113322.htm
University of Arkansas, Fayetteville. "Physicists quantify temperature changes in metal nanowires." ScienceDaily. www.sciencedaily.com/releases/2014/01/140121113322.htm (accessed July 30, 2014).

Share This




More Matter & Energy News

Wednesday, July 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Climate Change Could Cost Billions, According To White House

Climate Change Could Cost Billions, According To White House

Newsy (July 29, 2014) A report from the White House warns not curbing greenhouse gas emissions could cost the U.S. billions. Video provided by Newsy
Powered by NewsLook.com
Stranded Whale Watching Boat Returns to Boston

Stranded Whale Watching Boat Returns to Boston

Reuters - US Online Video (July 29, 2014) Passengers stuck overnight on a whale watching boat return safely to Boston. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
Baluchistan Mining Eyes an Uncertain Future

Baluchistan Mining Eyes an Uncertain Future

AFP (July 29, 2014) Coal mining is one of the major industries in Baluchistan but a lack of infrastructure and frequent accidents mean that the area has yet to hit its potential. Duration: 01:58 Video provided by AFP
Powered by NewsLook.com
Easier Nuclear Construction Promises Fall Short

Easier Nuclear Construction Promises Fall Short

AP (July 29, 2014) The U.S. nuclear industry started building its first new plants using prefabricated Lego-like blocks meant to save time and prevent the cost overruns that crippled the sector decades ago. So far, it's not working. (July 29) 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:
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