Navigation Links
Nano 'pin art': NIST arrays are step toward mass production of nanowires

NIST researchers grow nanowires made of semiconductorsgallium nitride alloysby depositing atoms layer-by-layer on a silicon crystal under high vacuum. NIST has the unusual capability to produce these nanowires without using metal catalysts, thereby enhancing luminescence and reducing defects. NIST nanowires also have excellent mechanical quality factors.

The latest experiments, described in Advanced Functional Materials,* maintained the purity and defect-free crystal structure of NIST nanowires while controlling diameter and placement better than has been reported by other groups for catalyst-based nanowires. Precise control of diameter and placement is essential before nanowires can be widely used.

The key trick in the NIST technique is to grow the wires through precisely defined holes in a stencil-like mask covering the silicon wafer. The NIST nanowires were grown through openings in patterned silicon nitride masks. About 30,000 nanowires were grown per 76-millimeter-wide wafer. The technique controlled nanowire location almost perfectly. Wires grew uniformly through most openings and were absent on most of the mask surface.

Mask openings ranged from 300 to 1000 nanometers (nm) wide, in increments of 100 nm. In each opening of 300 nm or 400 nm, a single nanowire grew, with a well-formed hexagonal shape and a symmetrical tip with six facets. Larger openings produced more variable results. Openings of 400 nm to 900 nm yielded single-crystal nanowires with multifaceted tops. Structures grown in 1,000-nm openings appeared to be multiple wires stuck together. All nanowires grew to about 1,000 nm tall over three days.

NIST researchers analyzed micrographs to verify the uniformity of nanowire shape and size statistically. The analysis revealed nearly uniform areas of wires of the same diameter as well as nearly perfect hexagonal shapes.

Growing nanowires on silicon is one approach NIST researchers are exploring for making "nanowires on a chip" devices. Although the growth temperatures are too highover 800 degrees Celsiusfor silicon circuitry to tolerate, there may be ways to grow the nanowires first and then protect them during circuitry fabrication, lead author Kris Bertness says. The research was partially supported by the Defense Advanced Research Projects Agency (DARPA) Center on NanoscaleScience and Technology for Integrated Micro/Nano-Electromechanical Transducers (iMINT) at the University of Colorado at Boulder.


Contact: Laura Ost
National Institute of Standards and Technology (NIST)

Related biology technology :

1. Ambry Genetics Announces Certified Service Provider Status for Agilent Microarrays
2. Researchers write protein nanoarrays using a fountain pen and electric fields
3. Self-assembling polymer arrays improve data storage potential
4. Flexible nanoantenna arrays capture abundant solar energy
5. Key milestone towards the development of a new clinically useful antibiotic
6. Quantum move toward next generation computing
7. “Let's Move” Toward Filling, Healthy Childhood Snack Solutions
8. Corgenix and Tulane Announce Award of Additional NIH Contract to Expand Lassa Fever Research Towards Development of Vaccines and Improved Therapeutic Agents
9. Critical Step Toward Commercialization of Pre-Symptomatic Diagnosis of Ovarian Cancer Achieved by Arrayit Diagnostics
10. Dendreon Reports Third Quarter 2009 Financial Results and Continuing Progress Toward PROVENGE Commercialization
11. A breakthrough toward industrial production of fluorescent nanodiamonds
Post Your Comments:
Related Image:
Nano 'pin art': NIST arrays are step toward mass production of nanowires
(Date:11/25/2015)... The Global Genomics Industry ... and in-depth study on the current state of ... ) , The report provides ... classifications, applications and industry chain structure. The Genomics ... including development trends, competitive landscape analysis, and key ...
(Date:11/24/2015)... Therapeutics, Inc. (NASDAQ: HALO ) will be presenting at the ... on Wednesday, December 2 at 9:30 a.m. ET/6:30 a.m. PT . ... a corporate overview. th Annual Oppenheimer Healthcare Conference ... a.m. PT . Jim Mazzola , vice president of ... --> th Annual Oppenheimer Healthcare Conference in ...
(Date:11/24/2015)...  Clintrax Global, Inc., a worldwide provider of clinical research services ... that the company has set a new quarterly earnings record in ... growth posted for Q3 of 2014 to Q3 of 2015.   ... , with the establishment of an Asia-Pacific ... United Kingdom and Mexico , ...
(Date:11/24/2015)... York , November 24, 2015 ... a recent market research report released by Transparency Market ... to expand at a CAGR of 17.5% during the ... Prenatal Testing Market - Global Industry Analysis, Size, Volume, ... the global non-invasive prenatal testing market to reach a ...
Breaking Biology Technology:
(Date:10/23/2015)... GOLETA, California , October 23, 2015 /PRNewswire/ ... SensoMotoric Instruments (SMI) announce a mobile plug and play ... during interactive real-world tasks SensoMotoric Instruments (SMI) ... their established wearable solutions for eye tracking and physiological ... captured with SMI Eye Tracking Glasses 2w ...
(Date:10/22/2015)... Oct. 22, 2015  Synaptics (NASDAQ: SYNA ), a leading ... first quarter ended September 30, 2015. --> ... fiscal 2016 grew 66 percent over the comparable quarter last year ... 2016 was $23.8 million, or $0.62 per diluted share. ... the first quarter of fiscal 2016 grew 39 percent over the ...
(Date:10/22/2015)... 2015 NXT-ID, Inc. (NASDAQ: ... company focused on the growing mobile commerce market and ... year collaboration with well-known celebrity Joey Fatone . ... ,      (Photo: ) ... 1995 to 2002, Joey was part of one of ...
Breaking Biology News(10 mins):