Navigation Links
Self-assembled nanowires could make chips smaller and faster
Date:4/20/2009

CHAMPAIGN, Ill. Researchers at the University of Illinois have found a new way to make transistors smaller and faster. The technique uses self-assembled, self-aligned, and defect-free nanowire channels made of gallium arsenide.

In a paper to appear in the IEEE (Institute of Electrical and Electronics Engineers) journal Electron Device Letters, U. of I. electrical and computer engineering professor Xiuling Li and graduate research assistant Seth Fortuna describe the first metal-semiconductor field-effect transistor fabricated with a self-assembled, planar gallium-arsenide nanowire channel.

Nanowires are attractive building blocks for both electronics and photonics applications. Compound semiconductor nanowires, such as gallium arsenide, are especially desirable because of their better transport properties and versatile heterojunctions. However, a number of challenges including integration with existing microelectronics must first be overcome.

"Our new planar growth process creates self-aligned, defect-free gallium-arsenide nanowires that could readily be scaled up for manufacturing purposes," said Li, who also is affiliated with the university's Micro and Nanoelectronics Laboratory and the Beckman Institute. "It's a non-lithographic process that can precisely control the nanowire dimension and orientation, yet is compatible with existing circuit design and fabrication technology."

The gallium-arsenide nanowire channel used in the researchers' demonstration transistor was grown by metal organic chemical vapor deposition using gold as a catalyst. The rest of the transistor was made with conventional microfabrication techniques.

While the diameter of the transistor's nanowire channel was approximately 200 nanometers, nanowires with diameters as small as 5 nanometers can be made with the gold-catalyzed growth technique, the researchers report. The self-aligned orientation of the nanowires is determined by the crystal
'/>"/>

Contact: James E. Kloeppel
kloeppel@illinois.edu
217-244-1073
University of Illinois at Urbana-Champaign
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Self-assembled materials form mini stem cell lab
2. Researchers peer into nanowires to measure dopant properties
3. Strong elasticity size effects in ZnO nanowires
4. Nanowires may boost solar cell efficiency, UC San Diego engineers say
5. Spiraling nanotrees offer new twist on growth of nanowires
6. Engineers make first active matrix display using nanowires
7. Carbon nanotubes outperform copper nanowires as interconnects
8. Chemists measure copper levels in zinc oxide nanowires
9. High Q NIST nanowires may be practical oscillators
10. Carbon nanotubes to be replaced by MoSIx nanowires in high-tech devices says new study
11. Putting the squeeze on an old material could lead to instant on electronic memory
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/15/2014)... January 15, 2014 A study has been ... the Formula 1 track could help to tackle the problem ... (MAT), Stowhealth (a GP surgery based in Stowmarket) and academics ... Simplyhealth. Telemetry technology, which is inspired by equipment ...
(Date:1/15/2014)... NY (PRWEB) January 15, 2014 The Microcompetition ... a major disease. One of these latent viruses is the ... rheumatoid arthritis (RA). Rheumatoid arthritis (RA) is a chronic inflammatory ... theory, a study found that RA patients have high concentrations ...
(Date:1/15/2014)... (PRWEB) January 15, 2014 Freeslate, ... solutions, today announced that Lupin Limited, one of India’s ... CM Protégé PharmD System for high throughput ... India, is focused on a wide range of quality, ...
(Date:1/14/2014)... Date: Friday, April 11, 2014 , Time: 6 p.m. – ... Warrington, Pa. , Details: The Hepatitis B Foundation, ... cure for hepatitis B and improving the quality of life ... on Friday, April 11 at Warrington Country Club in Warrington, ...
Breaking Biology Technology:Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 2Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 3Formula 1 Technology Tackles Obesity in Unique Healthcare Partnership 4Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 2Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 3Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3Hepatitis B Foundation to Host Annual Crystal Ball Gala 2
... Madison, Wis. - TomoTherapy, Inc. , producer ... reach to Germany. , , The University Clinic Heidelberg ... treat cancer patients with the Hi-Art System, a machine that ... cells with limited damage to healthy tissue. , ,Dr. Jrgen ...
... the third major storm of the 2006 Atlantic ... low-pressure system recently, apprehensions about impending natural and ... , ,A Wisconsin telecommunications company has been enlisted ... ,To address concerns of a large-scale crisis once ...
... tool that misrepresented something simple about more than 90 ... basing their health plan buying decisions on the often ... have to imagine such a scenario because they have ... ,Now a Wisconsin software developer believes it has come ...
Cached Biology Technology:Wisconsin firm leads testing of alerts by cell phone 2Wisconsin firm leads testing of alerts by cell phone 3Healthcare software addresses "90 million" misclassified Americans 2Healthcare software addresses "90 million" misclassified Americans 3
(Date:4/24/2014)... that cells are more resilient in taking care of ... critical components, cells can adapt and make copies of ... study published in this week,s Cell Reports , ... that cells can grow normally without a crucial component ... is stored in DNA, which has to be continuously ...
(Date:4/24/2014)... the Scientific Reports journal. , CSIC researcher Carles ... of CSIC and Pompeu Fabra University-UPF), explains: "When the Y ... that it did not match with the DNA recovered from ... genome and to make a functional interpretation in order to ... , The functional genome analysis was based on two ...
(Date:4/24/2014)... Researchers at Ludwig-Maximilians-Universitaet (LMU) in Munich have identified ... system to discriminate between viral and endogenous RNAs ... they take control of cellular metabolism and hijack ... This process is dependent on viral RNA molecules ... of RNA viruses) and/or newly synthesized in the ...
Breaking Biology News(10 mins):Cell resiliency surprises scientists 2The blood preserved in the pumpkin did not belong to Louis XVI 2Viral infections: Identifying the tell-tale patterns 2Viral infections: Identifying the tell-tale patterns 3
... is on track to become only the second disease ever ... The Journal of Infectious Diseases, now available online, scientists are ... gone. One study reduces concerns that people whose immune systems ... The other study looks at the how switching forms ...
... there has been great controversy about the ubiquitous vegetable's ... National Academies of Sciences, a team led by a ... has for the first time demonstrated a single origin ... scientists analyzed DNA markers in 261 wild and 98 ...
... into the chest to maintain circulation can significantly extend ... failure who are not candidates for heart transplantation, according ... Duke University Medical Center cardiologists. , The pumps, known ... the heart's left ventricle ?the chamber of the heart ...
Cached Biology News:Polio vaccination strategies assessed as eradication nears 2Polio vaccination strategies assessed as eradication nears 3Finding rewrites the evolutionary history of the origin of potatoes 2Implantable pumps extend lives of patients too sick for transplant 2Implantable pumps extend lives of patients too sick for transplant 3
... and other fluid sources for 8 vessels ... of each individual pump is controlled electronically. ... exactly maintained. ,High-precision controlled miniature pumps ... which allows flow rates between 0 and ...
... excellent ion chromatography system . The ... from 0.01S to 5000S, houses the measuring cell ... CE 4715, is available. Data processing is ... Solvent delivery is by the high pressure CE ...
Fujifilm Pictro-Color Process for sharp, clear reproduction comparable to silver-halide photography. Photorealistic 400 dpi quality. A4 and A5 output....
... and other fluid sources for 4 vessels ... of each individual pump is controlled electronically. ... exactly maintained. ,High-precision controlled peristaltic pumps ... which allows flow rates between 0.01 to ...
Biology Products: