Making Nanotube TVs happen


Researchers have turned to carbon nanotubes to create a new class of large area, high resolution, low cost flat panel displays. Some believe field emission display (FED) technology, utilizing carbon nanotubes (CNT) as electron emitter, will be the bi

(I-Newswire) March 2, 2006 - (Nanowerk News) Researchers have turned to carbon nanotubes to create a new class of large area, high resolution, low cost flat panel displays. Some believe field emission display (FED) technology, utilizing carbon nanotubes (CNT) as electron emitter, will be the biggest threat to LCD's dominance in the panel display arena and that FED is the technology of choice for ultra-high definition, wide-screen televisions.
FEDs, in a sense, are a hybrid of CRT televisions and LCD televisions. They capitalise on the well-established cathode-anode-phosphor technology built into full-sized CRTs using this in combination with the dot matrix cellular construction of LCDs. The electron emitters, arranged in a grid, are individually controlled by "cold" cathodes (unlike in normal CRTs, field emission does not rely on heating the cathode to boil off electrons) to generate colored light.
Field emission display technology makes possible the thin panel of today's liquid crystal displays (LCD), offers a wider field-of-view, provides the high image quality of today's cathode ray tube (CRT) displays, and requires less power than today's CRT displays.
Researchers in Taiwan report significant progress in developing a very low-cost fabrication method for the deposition of CNT film for FED applications. Their findings were reported in a paper titled "Fabrication of carbon nanotube field emission cathodes in patterns by a laser transfer method" in the Feb. 7, 2006 online edition of the journal Nanotechnology.

Jeng-Rong Ho, Professor in the Department of Mechanical Engineering at National Chung Cheng University in Taiwan, explained to Nanowerk that their study proposes a simple and inherently very low cost fabrication method, based on the laser induced forward transfer (LIFT) technique, for the deposition of CNT film for FED applications. The LIFT technique employs laser irradiation to transfer a film initially precoated on an optically transparent support onto a substrate with single laser pulses.
"Here, for the first time" says Ho, "employing this technique for FED applications, precision pattern deposition of CNT on a variety of substrates at room temperature and in an ambient environment and also with the feature size down to 10 µm has been achieved." He adds "The lighting test shows that the patterned CNT film exhibits excellent field emission characteristics."
FED manufacturing requires CNT to be grown in precise sizes and densities. Height, diameter and tip sharpness affect voltage, while density affects current. But early techniques were rife with technical problems.
Researchers incorporated nanotubes into a paste that was placed on a substrate. The haphazard placement of the tubes and their tendency to clump together created spotty illumination. This problem was overcome by growing carbon nanotubes in a specific and orderly manner on substrates using a low-temperature chemical vapor deposition (CVD) process. Low melting temperature, however, excludes the use of the chemical vapour deposition method for growing the large area CNT film directly on substrates.
Several alternative approaches have been proposed. The printing based methods and the electrophoretic deposition related methods are two sets of alternatives that attract much industrial attention due to their full scalability and mass production potential. The printing based methods usually use binders or pastes mixing with the CNT that sometimes have problems of tube alignment, uniformity, insufficient outcrop tube density on the surface and possible organic residues. A special surface post-treatment, such as surface rubbing, adhesive taping or laser irradiation, is indispensable.
The electrophoretic related methods, although they have shown promise in producing reasonable homogeneity and packing density with controllable film thickness and morphology, require formation from the liquid phase and detailed information on operation has not been reported yet.
In their laser-assisted pattern deposition of CNT field emission cathodes on different substrates the Korean researchers achieved favourable emission characteristics, high pattern resolution, with feature size down to 10 µm, high feasibility of using various substrates, good CNT adhesion and fast deposition rate. Furthermore, all steps can be executed in the ambient environment and at low temperature, consequently offering the benefit of potential low cost fabrication of precision pattern deposition.

By Michael Berger, Copyright 2006 Nanowerk LLC




Company Contact Information
Nanowerk News




Archive

March 2, 2006

If you have questions regarding information in this press release contact the company listed above. I-Newswire.com is a press release service and not the author of this press release. The information that is on or available through this site is for informational purposes only and speaks only as of the particular date or dates of that information. As some companies / PR Agencies submit their press releases once per week/month or quarter, make sure check the official company website for accurate release dates as our site displays the I-Newswire.com distribution date only. We do not guarantee the accuracy or completeness of information on or available through this site, and we are not responsible for inaccuracies or omissions in that information or for actions taken in reliance on that information.


Related Releases

Relish The Interesting Stories Of Amar Chitra Katha At Unbelievable Price On Infibeam

Get the best collection of Indian stories published by Amar Chitra Katha at infibeam, an online shopping website at an unbelievable additional 15% off.

Lamb of God Partners with Specticast for Worldwide Theatrical Distribution of "As The Palaces Burn" Documentary Film

As The Palaces Burn is a film about metal icons Lamb of God, the zealous passion of their fan base, and the gut-wrenching manslaughter trial of lead singer Randy Blythe.

Mervik Haums Publishes Free Infographic To Explain Affiliate Marketing

An Infographic is by far the best way to demonstrate any idea or marketing plan. As it is a visual representation of information, data and knowledge, the viewer get a very clear idea about whatever the graphic is built for.

86.7% Of People Think It Is A Good Time To Be Investing In Adelaide Property

Adelaide Finance Brokers Urbantech Group recently ran a survey on their website. They asked the simple question: "Do you think it is a good time to be i

The Metro Joins The Hunt For Santa With Ted Burns

Ted Burns, the host of Third Degree, is searching for Santa, also known as the Yuletide Yobbo. And now he's got the support of the Metro, the UK's leading free newspaper.

Latest 10 Headlines

Broken Head Holiday Park Special Offers 2014

Broken Head Holiday Park has made it even easier for families, couples and individuals to afford to take a break thanks to a new range of special offers available on their website.

Australian Government's Frustration on RBA Stance 'risks Central Bank's Independence' States Alocoveritas' Earl Reginald Stevenson

"The question here is not should rates be lower or higher, but is it worth the risk of impugning the independence of the Reserve Bank," said Alcoveritas' Senior Managing Partner, Earl Reginald Stevenson in Sydney, Australia.

Broken Head Holiday Park Gear Up With New Activities List

Byron Bay camping and caravan resort, Broken Head Holiday Park, has introduced a new list of activities to their website which holiday makers can look forward to over the coming months.

Ingram Content Group and Hachette Livre Offer Titles from the Bibliothèque Nationale De France

Ingram Content Group Inc. today announced a print-on-demand initiative that integrates Hachette Livre's publishing program with Ingram's on-demand print and distribution solutions to make thousands of Bibliothèque nationale de France (BnF).

Pay Per Click Jobs Available At Manav Revolution Infotech

PAY PER CLICK Jobs is an internet advertising model used to direct traffic to websites in which advertisers pay the website owner when the ad is clicked. In simple words "the amount spent to get an ad clicked."

How Can I Get White Teeth In Bonita Springs, Fl

Here are the numerous advantages of teeth whitening and the way it will enhance someone's life.

Resume Myths Vs. Facts Infographic by Almagreta Outlines An Ideal Resume

Almagreta just released Resume Myths vs. Facts infographic which highlights resume writing misconceptions and provide hard facts from HR officers, recruiters and career coaches to help job seekers land the job.

Transportation of Chemicals - Market Requirements

Due to the exacting standards, transportation of chemicals is not an easy project. A rapidly growing chemical market creates new opportunities for logistics companies but it also systematically requires higher requirements.

BroadConnect Telecom Provides Automatic Call Distribution (ACD) and Queuing

Broadconnect Telecom, the leading telecommunication provider in USA and Canada provides automatic call distribution and queuing.

Chic Blueprint Started Shirt Distribution Center in Karolbagh New Delhi

Chic Blueprint is a global online casual shirts wholesaler and retailer own label product lines across menswear with approximately 500 new product are being introduced each month.

Helpful Articles

Increase Website Traffic By Using Press Releases
Write A Press Release For Big Time News
Get Backlinks From Press Releases
How To Write A Press Release Quick And Easy
Choosing A Press Release Service
Writing A News Press Release
Get More Traffic From Press Releases
Is A Press Release Service Worth It?
Effective Press Release Distribution
Create a Successful Online Press Release
Submit A Press Release and Get More Traffic
How To Write A Press Release
Check This Before You Send A Press Release
Using A Press Release Service For Your News Release

Our Services:

Submit Your Free Press Release Now.

Open Now:
Online Classified Ads at I-Newswire.com
Job Search Engine at I-Newswire.com
Car Search Engine at I-Newswire.com
Real Estate Search at I-Newswire.com
Website News Releases, Announcements and Updates

Other Cool Sites:
Breaking and Latest Automotive News
Learn the secrets on how to become an alpha male and how to meet girls on facebook at Dating-To-Mating.com. Check out the best spinner and instant article factory for your content writing needs.