Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > How to grow wires and tiny plates Liquid processing method developed at MIT can control the shapes of nanowires and produce complete electronic devices

Nanostructures are directly synthesized in parallel microfluidic channels (held by the metal frame) by flowing special chemical reactant solution through the tubing. The microfluidic not only creates the functional device, but is also the final packaged functional LED device itself.
Photo: Jaebum Joo
Nanostructures are directly synthesized in parallel microfluidic channels (held by the metal frame) by flowing special chemical reactant solution through the tubing. The microfluidic not only creates the functional device, but is also the final packaged functional LED device itself. Photo: Jaebum Joo

Abstract:
Researchers at MIT have found a way to control precisely the shapes of submicroscopic wires deposited from a solution — using a method that makes it possible to produce entire electronic devices through a liquid-based process.

How to grow wires and tiny plates Liquid processing method developed at MIT can control the shapes of nanowires and produce complete electronic devices

Cambridge, MA | Posted on July 14th, 2011

The team demonstrated the technique by producing a functional light-emitting diode (LED) array made of zinc oxide nanowires in a single beaker, instead of the several separate steps and devices required for conventional production. They were able to do so under relatively benign conditions, with moderate temperatures and no vacuum needed.

Unlike larger structures, with nanomaterials — those with dimensions measured in nanometers, or billionths of a meter — differences in shape can lead to dramatic differences in behavior. "For nanostructures, there's a coupling between the geometry and the electrical and optical properties," explains Brian Chow, a postdoc at MIT and co-author of a paper describing the results that was published July 10 in the journal Nature Materials. "Being able to tune the geometry is very powerful," he says. The system Chow and his colleagues developed can precisely control the aspect ratio (the ratio of length to width) of the nanowires to produce anything from flat plates to long thin wires.

There are other ways of making such nanowires, Chow says. "People have done a good job of controlling the morphology of wires by other means — using high temperatures, high pressure, or subtractive processing. But to be able to do this under these benign conditions is attractive," because it makes it possible to integrate such devices with relatively fragile materials such as polymers and plastics, he says.

Control over the shapes of the wires has until now been essentially a trial-and-error process. "We were trying to find out what is the controlling factor," explains Jaebum Joo PhD '10, who was the lead author of the paper.

The key turns out to be the electrostatic properties of the zinc oxide material as it grows from a solution, they found. Different compounds, when added to the solution, attach themselves electrostatically only to certain parts of the wire — just to the sides, or just to the ends — inhibiting the wire's growth in those directions. The amount of inhibition depends on the specific properties of the added compounds.

While this work was done with zinc oxide nanowires — a promising material that is being widely studied by researchers — the MIT scientists believe the method they developed for controlling the shape of the wires "can be expanded to different material systems," Joo says, perhaps including titanium dioxide which is being investigated for devices such as solar cells. Because the benign assembly conditions allow the material to be deposited on plastic surfaces, he says, it might enable the development of flexible display panels, for example.

But there are also many potential applications using the zinc oxide material itself, including the production of batteries, sensors, and optical devices. And the processing method has "the potential for large-scale manufacturing," Joo says.

The team also hopes to be able to use the method to make "spatially complex devices from the bottom up, out of biocompatible polymers." These could be used, for example, to make tiny devices that could be implanted in the brain to provide both sensing and stimulation.

In addition to Joo and Chow, the research was carried out by visiting scholar Manu Prakesh, along with Media Lab associate professors Edward Boyden and Joseph Jacobson. It was funded by the MIT Center for Bits and Atoms; the MIT Media Lab; the Korea Foundation for Advanced Studies; Samsung Electronics; the Harvard Society of Fellows; the Wallace H. Coulter Early Career Award; the NARSAD Young Investigator Award; the National Science Foundation; and the NIH Director's New Innovator Award.

####

For more information, please click here

Copyright © MIT

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

The power of perovskite: OIST researchers improve perovskite-based technology in the entire energy cycle, from solar cells harnessing power to LED diodes to light the screens of future electronic devices and other lighting applications August 18th, 2017

Gold nanostars and immunotherapy vaccinate mice against cancer: New treatment cures, vaccinates mouse in small proof-of-concept study August 18th, 2017

Researchers printed graphene-like materials with inkjet August 17th, 2017

Candy cane supercapacitor could enable fast charging of mobile phones August 17th, 2017

Display technology/LEDs/SS Lighting/OLEDs

The power of perovskite: OIST researchers improve perovskite-based technology in the entire energy cycle, from solar cells harnessing power to LED diodes to light the screens of future electronic devices and other lighting applications August 18th, 2017

Govt.-Legislation/Regulation/Funding/Policy

Researchers printed graphene-like materials with inkjet August 17th, 2017

Freeze-dried foam soaks up carbon dioxide: Rice University scientists lead effort to make novel 3-D material August 16th, 2017

2-faced 2-D material is a first at Rice: Rice University materials scientists create flat sandwich of sulfur, molybdenum and selenium August 14th, 2017

Engineers pioneer platinum shell formation process – and achieve first-ever observation August 11th, 2017

Sensors

Researchers printed graphene-like materials with inkjet August 17th, 2017

Sensing technology takes a quantum leap with RIT photonics research: Office of Naval Research funds levitated optomechanics project August 10th, 2017

Giant enhancement of electromagnetic waves revealed within small dielectric particles: Scientists have done for the first time direct measurements of giant electromagnetic fields July 8th, 2017

Bosch announces high-performance MEMS acceleration sensors for wearables June 27th, 2017

Nanoelectronics

GLOBALFOUNDRIES Demonstrates 2.5D High-Bandwidth Memory Solution for Data Center, Networking, and Cloud Applications: Solution leverages 2.5D packaging with low-latency, high-bandwidth memory PHY built on FX-14™ ASIC design system August 9th, 2017

GLOBALFOUNDRIES, Silicon Mobility Deliver the Industry’s First Automotive FPCU to Boost Performance for Hybrid and Electric Vehicles: Silicon Mobility and GF’s 55nm LPx -enabled platform, with SST’s highly-reliable SuperFlash® memory technology, boosts automotive performance, ene August 3rd, 2017

Scientists discover new magnet with nearly massless charge carriers July 29th, 2017

Atomic discovery opens door to greener, faster, smaller electronic circuitry: Scientists find way to correct communication pathways in silicon chips, making them perfect July 27th, 2017

Discoveries

The power of perovskite: OIST researchers improve perovskite-based technology in the entire energy cycle, from solar cells harnessing power to LED diodes to light the screens of future electronic devices and other lighting applications August 18th, 2017

Gold nanostars and immunotherapy vaccinate mice against cancer: New treatment cures, vaccinates mouse in small proof-of-concept study August 18th, 2017

Researchers printed graphene-like materials with inkjet August 17th, 2017

Candy cane supercapacitor could enable fast charging of mobile phones August 17th, 2017

Announcements

The power of perovskite: OIST researchers improve perovskite-based technology in the entire energy cycle, from solar cells harnessing power to LED diodes to light the screens of future electronic devices and other lighting applications August 18th, 2017

Gold nanostars and immunotherapy vaccinate mice against cancer: New treatment cures, vaccinates mouse in small proof-of-concept study August 18th, 2017

Researchers printed graphene-like materials with inkjet August 17th, 2017

Candy cane supercapacitor could enable fast charging of mobile phones August 17th, 2017

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

Candy cane supercapacitor could enable fast charging of mobile phones August 17th, 2017

Rice U. scientists map ways forward for lithium-ion batteries for extreme environments: Paper details developments toward high-temperature batteries July 27th, 2017

Regulation of two-dimensional nanomaterials: New driving force for lithium-ion batteries July 26th, 2017

Ultrathin device harvests electricity from human motion July 23rd, 2017

Photonics/Optics/Lasers

Researchers printed graphene-like materials with inkjet August 17th, 2017

Moving at the Speed of Light: University of Arizona selected for high-impact, industrial demonstration of new integrated photonic cryogenic datalink for focal plane arrays: Program is major milestone for AIM Photonics August 10th, 2017

Sensing technology takes a quantum leap with RIT photonics research: Office of Naval Research funds levitated optomechanics project August 10th, 2017

High resolution without particle accelerator: A first for physics -- University of Jena physicists are first to achieve optical coherence tomography with XUV radiation at laboratory scale August 7th, 2017

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