Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button

Home > Press > Sound waves precisely position nanowires

This image shows a simulation of the electric field distribution in a two-dimensional standing surface wave field.

Credit: Tony Jun Huang, Penn State
This image shows a simulation of the electric field distribution in a two-dimensional standing surface wave field.

Credit: Tony Jun Huang, Penn State

Abstract:
The smaller components become, the more difficult it is to create patterns in an economical and reproducible way, according to an interdisciplinary team of Penn State researchers who, using sound waves, can place nanowires in repeatable patterns for potential use in a variety of sensors, optoelectronics and nanoscale circuits.

Sound waves precisely position nanowires

Philadelphia, PA | Posted on June 19th, 2013

"There are ways to create these devices with lithography, but it is very hard to create patterns below 50 nanometers using lithography," said Tony Jun Huang, associate professor of engineering science and mechanics, Penn State. "It is rather simple now to make metal nanomaterials using synthetic chemistry. Our process allows pattern transfer of arrays of these nanomaterials onto substrates that might not be compatible with conventional lithography. For example, we could make networks of wires and then pattern them to arrays of living cells."

The researchers looked at the placement of metallic nanowires in solution on a piezoelectric substrate. Piezoelectric materials move when an electric voltage is applied to them and create an electric voltage when compressed.

In this case, the researchers applied an alternating current to the substrate so that the material's movement creates a standing surface acoustic wave in the solution. A standing wave has node locations that do not move, so the nanowires arrive at these nodes and remain there.

If the researchers apply only one current, then the nanowires form a one-dimensional array with the nanowires lined up head to tail in parallel rows. If perpendicular currents are used, a two-dimensional grid of standing waves forms and the nanowires move to those grid-point nodes and form a three-dimensional spark-like pattern.

"Because the pitch of both the one-dimensional and two-dimensional structures is sensitive to the frequency of the standing surface acoustic wave field, this technique allows for the patterning of nanowires with tunable spacing and density," the researchers report in a recent issue of ACS Nano. The nanowires in solution will settle in place onto the substrate when the solution evaporates, preserving the pattern. The researchers note that the patterned nanowires could then be transferred to organic polymer substrates with good accuracy by placing the polymer onto the top of the nanowires and with slight pressure, transferring the nanowires. They suggest that the nanowires could then be transferred to rigid or flexible substrates from the organic polymer using microcontact-printing techniques that are well developed.

"We really think our technique can be extremely powerful," said Huang. "We can tune the pattern to the configuration we want and then transfer the nanowires using a polymer stamp."

The spacing of the nodes where nanowires deposit can be adjusted on the fly by changing the frequency and the interaction between the two electric fields.

"This would save a lot of time compared to lithography or other static fabrication methods," said Huang. The researchers are currently investigating more complex designs.

###

Other researchers working on this project include Yuchao Chen, Xiaoyun Ding, Sz-Chin Steven Lin, Po-Hsun Huang, Nitesh Nama, Yanhui Zhao, Ahmad Ahsan Nawaz and Feng Guo, all graduate students in engineering science and mechanics; Shikuan Yang, postdoctoral researcher in engineering science and mechanics; Yeyi Gu, graduate student in food science; and Thomas E. Mallouk, Evan Pugh Professor of Chemistry, and Wei Wang, graduate student in chemistry.

The National Institutes of Health, National Science Foundation and the Penn State Center for Nanoscale Science supported this research.

####

For more information, please click here

Contacts:
A'ndrea Elyse Messer

814-865-9481

Copyright © Penn State

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Scientists find a way of acquiring graphene-like films from salts to boost nanoelectronics: Physicists use supercomputers to find a way of making 'imitation graphene' from salt July 30th, 2016

Vortex laser offers hope for Moore's Law: The optics advancement may solve an approaching data bottleneck by helping to boost computing power and information transfer rates tenfold July 30th, 2016

New method for making green LEDs enhances their efficiency and brightness July 30th, 2016

A new type of quantum bits July 29th, 2016

Govt.-Legislation/Regulation/Funding/Policy

Vortex laser offers hope for Moore's Law: The optics advancement may solve an approaching data bottleneck by helping to boost computing power and information transfer rates tenfold July 30th, 2016

A new type of quantum bits July 29th, 2016

Thomas Swan and NGI announce unique partnership July 28th, 2016

Penn team uses nanoparticles to break up plaque and prevent cavities July 28th, 2016

Chip Technology

Scientists find a way of acquiring graphene-like films from salts to boost nanoelectronics: Physicists use supercomputers to find a way of making 'imitation graphene' from salt July 30th, 2016

Vortex laser offers hope for Moore's Law: The optics advancement may solve an approaching data bottleneck by helping to boost computing power and information transfer rates tenfold July 30th, 2016

Novel state of matter: Observation of a quantum spin liquid July 29th, 2016

A new type of quantum bits July 29th, 2016

Optical computing/Photonic computing

Vortex laser offers hope for Moore's Law: The optics advancement may solve an approaching data bottleneck by helping to boost computing power and information transfer rates tenfold July 30th, 2016

Attosecond physics: Mapping electromagnetic waveforms July 25th, 2016

The birth of quantum holography: Making holograms of single light particles! July 21st, 2016

Researchers develop faster, precise silica coating process for quantum dot nanorods July 12th, 2016

Sensors

Ultrasensitive sensor using N-doped graphene July 26th, 2016

Integration of novel materials with silicon chips makes new 'smart' devices possible July 25th, 2016

Electron 'spin control' of levitated nanodiamonds could bring advances in sensors, quantum information processing July 20th, 2016

Easier, faster, cheaper: A full-filling approach to making nanotubes of consistent quality: Approach opens a straightforward route for engineering the properties of single-wall carbon nanotubes July 19th, 2016

Nanoelectronics

Scientists find a way of acquiring graphene-like films from salts to boost nanoelectronics: Physicists use supercomputers to find a way of making 'imitation graphene' from salt July 30th, 2016

Vortex laser offers hope for Moore's Law: The optics advancement may solve an approaching data bottleneck by helping to boost computing power and information transfer rates tenfold July 30th, 2016

Beating the heat a challenge at the nanoscale: Rice University scientists detect thermal boundary that hinders ultracold experiments July 28th, 2016

New nontoxic process promises larger ultrathin sheets of 2-D nanomaterials July 27th, 2016

Discoveries

Scientists find a way of acquiring graphene-like films from salts to boost nanoelectronics: Physicists use supercomputers to find a way of making 'imitation graphene' from salt July 30th, 2016

Vortex laser offers hope for Moore's Law: The optics advancement may solve an approaching data bottleneck by helping to boost computing power and information transfer rates tenfold July 30th, 2016

New method for making green LEDs enhances their efficiency and brightness July 30th, 2016

A new type of quantum bits July 29th, 2016

Announcements

Scientists find a way of acquiring graphene-like films from salts to boost nanoelectronics: Physicists use supercomputers to find a way of making 'imitation graphene' from salt July 30th, 2016

Vortex laser offers hope for Moore's Law: The optics advancement may solve an approaching data bottleneck by helping to boost computing power and information transfer rates tenfold July 30th, 2016

New method for making green LEDs enhances their efficiency and brightness July 30th, 2016

A new type of quantum bits July 29th, 2016

Battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage

New nontoxic process promises larger ultrathin sheets of 2-D nanomaterials July 27th, 2016

New lithium-oxygen battery greatly improves energy efficiency, longevity: New chemistry could overcome key drawbacks of lithium-air batteries July 26th, 2016

An accelerated pipeline to open materials research: ORNL workflow system unites imaging, algorithms, and HPC to advance materials discovery and design July 24th, 2016

Synthesized microporous 3-D graphene-like carbons: IBS research team create carbon synthesis using zeolites as a template July 1st, 2016

Printing/Lithography/Inkjet/Inks

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Perovskite solar cells surpass 20 percent efficiency: EPFL researchers are pushing the limits of perovskite solar cell performance by exploring the best way to grow these crystals June 13th, 2016

'On-the-fly' 3-D print system prints what you design, as you design it June 1st, 2016

Physicists create first metamaterial with rewritable magnetic ordering May 23rd, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic