Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > UCLA gets $5.5 million from Defense agency to create new rotating microscale motors

5-millimeter silicon rotary stage fabricated by UCLA engineers
5-millimeter silicon rotary stage fabricated by UCLA engineers

Abstract:
If you've ever used an iPhone, a Wii video game or an automobile airbag, you've benefited from micro-electro-mechanical systems (MEMS) technology, in which arrays of tiny devices mounted on computer chips — many no larger than the width of a human hair — are able to sense and respond to changes in heat, light, motion, sound or other external stimuli.

By Wileen Wong Kromhout

UCLA gets $5.5 million from Defense agency to create new rotating microscale motors

Los Angeles, CA | Posted on May 18th, 2010

Now, the UCLA Henry Samueli School of Engineering and Applied Science has been awarded $5.5 million from the U.S. Defense Department's central research and development agency to advance MEMS technology for use in defense systems.

The four-and-a-half-year grant from the Defense Advanced Research Project Agency (DARPA) will fund research by UCLA engineers to create electrically connected, rotating microscale motors for sensing and communications as part of the agency's Information Tethered Micro Automated Rotary Stages program.

The micromachining techniques used to fabricate microdevices have been highly successful in producing miniature systems and components — including sensors, actuators and electronics — that combine high performance with low weight and power consumption. And early MEMS work demonstrated multiple avenues for realizing micromotors that are able to rotate 360 degrees.

But even with the progress of MEMS technology, the use of rotating microdevices has not been as widespread as might be expected, according to DARPA, primarily because most applications have used structures fabricated into rotary stages without the availability of active electrical power, limiting the utility of the stages.

"Providing electric connections can be a little tricky, especially on continuous rotating platforms," said Chang-Jin "CJ" Kim, a professor of mechanical and aerospace engineering at UCLA Engineering and principal investigator on the DARPA project. "You rarely see physically free objects electrically connected. You can't have electrical wires protruding from an object that rotates endlessly. So that's one of the challenges we are facing."

Providing electrical power on a stage while allowing full rotation and precise position control of these components would lead to microsystems with much higher performance and functionality.

The goal of the UCLA Engineering team is to demonstrate a MEMS-fabricated rotary stage that would enable free rotation coupled with electrical power and signal transfer. This would launch the implementation of sensing and device operations on a microstage with position-measuring accuracies that would most likely be better than those obtained by large, instrumented optical rotary stages.

Thus far, Kim's group has successfully created a rotary stage using liquid droplets as the mechanical element that serves as a bridge between two moving objects. The liquid droplets, formed into a series of rings, provide physical support as well as rotational lubrication to the stage and allow for multiple stable electrical connections.

"On the microscale, smaller than a millimeter, the surface tension of liquid droplets, in terms of strength, is stronger than the weight of the droplet," said Kim, who specializes in MEMS. "That's why a smaller water droplet beads more and spreads less than a larger droplet. It stays in the form of a sphere. The smaller it gets, the greater the effect of surface tension gets. With liquid bearings formed by free droplets, only because they are very small, there is no solid-to-solid contact and there is no wear."

Kim's rings are made of liquid metals or ionic liquid, which not only allows for higher power but also leads to more stable electrical contact.

The team's next step will be to use electric signals to rotate the stage. Thus far, the capability to precisely rotate micromachined structures in a controllable manner has not been achieved.

"The rotary stage will be electro-statically activated by high-voltages applied across electrodes placed beneath the stage, and the high voltages will be applied by a high-voltage driver circuit," said Ken Yang, a professor of electrical engineering at UCLA Engineering and a co-principal investigator responsible for the development of the electronic interface that controls the rotary stage.

"The position of the stage will roughly be determined by activating a proper set of electrodes," Yang said. "The capacitance between electrodes will be a measure of the precise position. The control electronics will determine the appropriate sequence of binary voltages driven to each electrode. This will determine how the stage moves, in what direction, and how fast. We intend for the controller to be fully incorporated on an integrated circuit, also located beneath the rotor."

Once the team shows proof of concept, they will concentrate on making the motorized rotary stage smaller, more accurate and more efficient.

Other members of the UCLA team include Eric Chiou, an assistant professor of mechanical and aerospace engineering; Sungtaek Ju, an associate professor of mechanical and aerospace engineering; Jason Woo, a professor of electrical engineering; and Chris Gudeman of Innovative Micro Technology (IMT), a company specializing in micromachines.

####

About UCLA
The UCLA Henry Samueli School of Engineering and Applied Science, established in 1945, offers 28 academic and professional degree programs, including an interdepartmental graduate degree program in biomedical engineering. Ranked among the top 10 engineering schools at public universities nationwide, the school is home to eight multimillion-dollar interdisciplinary research centers in wireless sensor systems, nanotechnology, nanomanufacturing and nanoelectronics, all funded by federal and private agencies.

For more information, please click here

Contacts:
Media Contacts
Wileen Wong Kromhout,
(310) 206-0540

Copyright © UCLA

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

Iran to Hold 3rd Int'l Engineering Materials, Metallurgy Conference October 25th, 2014

Haydale Secures Exclusive Development and Supply Agreement with Tantec A/S: New reactors to be built and commissioned by Tantec A/S represent another step forward towards the commercialisation of graphene October 24th, 2014

QuantumWise guides the semiconductor industry towards the atomic scale October 24th, 2014

SUNY Polytechnic Institute Invites the Public to Attend its Popular Statewide 'NANOvember' Series of Outreach and Educational Events October 23rd, 2014

Govt.-Legislation/Regulation/Funding/Policy

Novel Rocket Design Flight Tested: New Rocket Propellant and Motor Design Offers High Performance and Safety October 23rd, 2014

Strengthening thin-film bonds with ultrafast data collection October 23rd, 2014

Brookhaven Lab Launches Computational Science Initiative:Leveraging computational science expertise and investments across the Laboratory to tackle "big data" challenges October 22nd, 2014

Bipolar Disorder Discovery at the Nano Level: Tiny structures found in brain synapses help scientists better understand disorder October 22nd, 2014

Possible Futures

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Superconducting circuits, simplified: New circuit design could unlock the power of experimental superconducting computer chips October 18th, 2014

Nanocoatings Market By Product Is Expected To Reach USD 8.17 Billion By 2020: Grand View Research, Inc. October 15th, 2014

Perpetuus Carbon Group Receives Independent Verification of its Production Capacity for Graphenes at 140 Tonnes per Annum: Perpetuus Becomes the First Manufacturer in the Sector to Allow Third Party Audit October 7th, 2014

Academic/Education

SUNY Polytechnic Institute Invites the Public to Attend its Popular Statewide 'NANOvember' Series of Outreach and Educational Events October 23rd, 2014

First Canada Excellence Research Chair gets $10 million from the federal government for oilsands research at the University of Calgary: Federal government announces prestigious research chair to study improving oil production efficiency October 19th, 2014

Raytheon, UMass Lowell open on-campus research institute: Industry leader’s researchers to collaborate with faculty, students to move key technologies forward through first-of-its-kind partnership October 11th, 2014

SUNY Colleges of Nanoscale Science and Engineering and National Institute for Occupational Safety and Health Announce Expanded Partnership October 2nd, 2014

MEMS

MEMS & Sensors Technology Showcase: Finalists Announced for MEMS Executive Congress US 2014 October 23rd, 2014

IEEE International Electron Devices Meeting To Celebrate 60th Anniversary as The Leading Technical Conference for Advanced Semiconductor Devices September 18th, 2014

Carbyne morphs when stretched: Rice University calculations show carbon-atom chain would go metal to semiconductor July 21st, 2014

Leti to Present Technological Platforms Targeting Industry’s Needs for the Future at Semicon West Workshop: Presentation at STS Session to Focus on Leti Advanced Lithography Programs for 1x Nodes and on Silicon Photonics at TechXPot June 25th, 2014

Sensors

MEMS & Sensors Technology Showcase: Finalists Announced for MEMS Executive Congress US 2014 October 23rd, 2014

Journal Nanotechnology Progress International (JONPI), 2014, Volume 5, Issue 1, pp 1-24 October 22nd, 2014

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Graphenea opens US branch October 16th, 2014

Announcements

Iran to Hold 3rd Int'l Engineering Materials, Metallurgy Conference October 25th, 2014

Haydale Secures Exclusive Development and Supply Agreement with Tantec A/S: New reactors to be built and commissioned by Tantec A/S represent another step forward towards the commercialisation of graphene October 24th, 2014

QuantumWise guides the semiconductor industry towards the atomic scale October 24th, 2014

Strengthening thin-film bonds with ultrafast data collection October 23rd, 2014

Military

NanoTechnology for Defense (NT4D) October 22nd, 2014

Crystallizing the DNA nanotechnology dream: Scientists have designed the first large DNA crystals with precisely prescribed depths and complex 3D features, which could create revolutionary nanodevices October 20th, 2014

Imaging electric charge propagating along microbial nanowires October 20th, 2014

1980s aircraft helps quantum technology take flight October 20th, 2014

Grants/Awards/Scholarships/Gifts/Contests/Honors/Records

Special UO microscope captures defects in nanotubes: University of Oregon chemists provide a detailed view of traps that disrupt energy flow, possibly pointing toward improved charge-carrying devices October 21st, 2014

Crystallizing the DNA nanotechnology dream: Scientists have designed the first large DNA crystals with precisely prescribed depths and complex 3D features, which could create revolutionary nanodevices October 20th, 2014

QD Vision Wins Prestigious Presidential Green Chemistry Challenge Award from the U.S. Environmental Protection Agency October 16th, 2014

Beyond LEDs: Brighter, new energy-saving flat panel lights based on carbon nanotubes - Planar light source using a phosphor screen with highly crystalline single-walled carbon nanotubes (SWCNTs) as field emitters demonstrates its potential for energy-efficient lighting device October 14th, 2014

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







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE