Free Newsletters - Space - Defense - Environment - Energy - Solar - Nuclear
..
. 24/7 Space News .




TECH SPACE
NTU research embraces laser and sparks cool affair
by Staff Writers
Singapore (SPX) Feb 01, 2013


File image.

Bulky and noisy air-conditioning compressors and refrigerators may soon be a thing of the past.

With the latest discovery by scientists from Nanyang Technological University (NTU), current cooling systems which uses refrigerant harmful to the ozone layer could be replaced by a revolutionary cooling system using lasers.

This discovery, published and featured on the cover of Nature, the world's top scientific journal, could also potentially lead to a host of other innovations. This includes making huge Magnetic Resonance Imaging (MRI) machines, unwieldy night vision goggles and satellite cameras - all of which require extreme cooling systems - even more compact and energy saving.

This breakthrough in laser cooling technology can even lead to the development of almost sci-fi like computer chips that cool on their own, minimising heat and thus prolonging battery life for portable devices like tablets and smart phones.

Assistant Professor Xiong Qihua from the School of Physical and Mathematical Sciences and the School of Electrical and Electronic Engineering had cooled down a semiconductor from 20 degrees Celsius down to minus 20 degrees Celsius. Before this, the cooling of semiconductors by laser has never been proven.

The material, Cadmium Sulfide, is a type of group II-VI semiconductor commonly used in solar cells, sensors and electronics.

"If we are able to harness the power of laser cooling, it would mean that medical devices which require extreme cooling, such as MRI which uses liquid helium, could do away with their bulky refrigerant systems with just with an optical refrigeration device in its place," Prof Xiong said.

"Not only that, but it would also remove the need for compressors and coolants in air-conditioning and refrigerators used in our homes and automobiles, saving space, energy and green house gases which are harmful to our ozone layer.

The potential for a compact, cost-effective, vibration-free and cryogen-less cooling system is enormous, as the global market for energy-efficient buildings is estimated to be worth over $100 billion dollars by 2017, according to reports by Global Industry Analysts (GIA).

"This also translates into the ability to build miniaturised coolers to cool infrared sensors used in satellites for imaging and build self-cooling computer chips suitable for use in portable devices like tablets and smart phones."

Prof Xiong, who leads a research team of 25 people including three undergraduates, is now looking to bring laser cooling down to liquid helium temperature at minus 269 degree Celsius. This is because in principle and theory, semiconductors can support laser cooling down to such a low temperatures.

"Our initial results published in Nature, have shown that it is possible to laser-cool a semiconductor to liquid nitrogen temperature, so we are aiming to reach an even lower temperature, such as that of liquid helium," said Prof Xiong, who had directed the research efforts of his researchers Dr. Zhang Jun and Ph.D. student Li Dehui towards this new area.

This experiment which took three years to complete was funded by NTU, Prof Xiong's National Research Foundation Fellowship grant and the Ministry of Education Academic Research Fund.

NTU's ground-breaking research into fundamental physics and sciences is one of the key components in Sustainability, one of the university's Five Peaks of Excellence, areas of research which NTU hopes to make a global mark in under its five-year strategic plan.

Such a development of a laser cooling system will also benefit other key research areas, such as Future Healthcare which is also a Peak of Excellence. Other peaks include New Media, Innovation Asia and the Best of East and West.

.


Related Links
Nanyang Technological University
Space Technology News - Applications and Research






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





TECH SPACE
Space Station Crew Uses Laser Channel to Beam Data
Moscow (RIA Novosti) Jan 31, 2013
Russian astronauts onboard the International Space Station (ISS) have transferred scientific data using a laser communication channel for the first time in international practice, the Federal Space Agency Roscosmos said on Tuesday. The information was transferred through the earth's atmosphere at a rate of 125 megabytes per second from an onboard laser terminal, the agency said. The ... read more


TECH SPACE
US, Europe team up for moon fly-by

Russia to Launch Lunar Mission in 2015

US, Europe team up for moon fly-by

Mission would drag asteroid to the moon

TECH SPACE
AAS Division For Planetary Sciences Issues Statement On Mars 2020 Program

Curiosity Maneuver Prepares for Drilling

Ridges on Mars suggest ancient flowing water

Changes on Mars Caused by Seasonal Thawing of CO2

TECH SPACE
Sierra Nevada Corporation and Lockheed Martin Space Systems Company Partner On Dream Chaser Programs

NASA Launches Next-Gen Communications Satellite

NASA Takes Strides Forward to Launch Americans from U.S. Soil

Iran Takes First Step to Send Man to Space

TECH SPACE
Reshuffle for Tiangong

China to launch 20 spacecrafts in 2013

Mr Xi in Space

China plans manned space launch in 2013: state media

TECH SPACE
NASA to Send Inflatable Pod to International Space Station

ISS to get inflatable module

ESA workhorse to power NASA's Orion spacecraft

Competition Hopes To Fine Tune ISS Solar Array Shadowing

TECH SPACE
Site of space rocket launch to become home of S. Korea's space program

Payload preps continue for first Ariane 5 flights of 2013

NASA Wallops Rocket Mission January 29 Prepping for Future Projects

Russia's Troubled Rocket Cleared for Launch

TECH SPACE
TW Hydrae: There's more to astronomers' favorite planetary nursery than previously thought

The Origin And Maintenance Of A Retrograde Exoplanet

New Evidence Indicates Auroras Occur Outside Our Solar System

Glitch has space telescope shut down

TECH SPACE
NTU research embraces laser and sparks cool affair

Bioinspired fibers change color when stretched

Stanford Researchers Break Million-core Supercomputer Barrier

Scientists trick iron-eating bacteria into breathing electrons instead




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement