Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

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

French Institutes IRT Nanoelec and CMP Team up to Offer World’s First Service for Post-process 3D Technologies on Multi-Project-Wafer March 5th, 2015

The George Washington University Opens Science and Engineering Hall, Largest Building of Its Kind in D.C.: Building Represents Significant Investment in Research Programs and Facilities; Commitment to Solve Global Problems, Improve Lives of Millions March 5th, 2015

Anousheh Ansari Wins the National Space Society's Space Pioneer Award for "Service to the Space Community" March 5th, 2015

Enhanced Graphene Components for Next Generation Racing Yacht March 5th, 2015

Govt.-Legislation/Regulation/Funding/Policy

New research could lead to more efficient electrical energy storage March 4th, 2015

Energy-generating cloth could replace batteries in wearable devices March 4th, 2015

The taming of magnetic vortices: Unified theory for skyrmion-materials March 3rd, 2015

Black phosphorus is new 'wonder material' for improving optical communication March 3rd, 2015

Possible Futures

European roadmap for graphene science and technology published February 25th, 2015

Quantum research past, present and future for discussion at AAAS February 16th, 2015

World’s first compact rotary 3D printer-cum-scanner unveiled at AAAS by NTU Singapore start-up: With production funded by crowdsourcing, the first unit will be delivered to the United States in March February 16th, 2015

Nanotechnology Electric Vehicle (EV) Market Analysis Report 2015: According to Radiant Insights, Inc February 13th, 2015

Academic/Education

Get ready for NanoDays! March 5th, 2015

NanoTecNexus Launches New App for Learning About Nanotechnology—STEM Education Project Spearheaded by Interns February 26th, 2015

SUNY Poly CNSE Researchers and Corporate Partners to Present Forty Papers at Globally Recognized Lithography Conference: SUNY Poly CNSE Research Group Awarded Both ‘Best Research Paper’ and ‘Best Research Poster’ at SPIE Advanced Lithography 2015 forum February 25th, 2015

KIT Increases Commitment in Asia: DAAD Funds Two New Projects: Strategic Partnerships with Chinese Universities and Communi-cation Technologies Network February 22nd, 2015

MEMS

French Institutes IRT Nanoelec and CMP Team up to Offer World’s First Service for Post-process 3D Technologies on Multi-Project-Wafer March 5th, 2015

MEMS/Sensors Drive IoT/E Innovation in Europe: MEMS Executive Congress Europe Speakers Explore Internet of Things/Everything in Automotive, Consumer, Industrial Markets, 9-10, March in Copenhagen February 9th, 2015

STMicroelectronics Leads European Research Project to Develop Next-Generation Optical MEMS: Extension to a project launched in 2013 builds on current efforts to enable technologies for next-generation applications February 4th, 2015

Entegris Launches Dispense System Optimized for 3D and MEMS Applications: New IntelliGen® MV system delivers process efficiencies and defect reduction in dispensing mid-viscosity fluids February 3rd, 2015

Sensors

Experiment and theory unite at last in debate over microbial nanowires: New model and experiments settle debate over metallic-like conductivity of microbial nanowires in bacterium March 4th, 2015

Pens filled with high-tech inks for do-it-yourself sensors March 3rd, 2015

Penn researchers develop new technique for making molybdenum disulfide: Extra control over monolayer material with advantages over graphene February 19th, 2015

Researchers build atomically thin gas and chemical sensors: Sensors made of molybdenum disulfide are small, thin and have a high level of selectivity when detecting gases and chemicals February 19th, 2015

Announcements

The George Washington University Opens Science and Engineering Hall, Largest Building of Its Kind in D.C.: Building Represents Significant Investment in Research Programs and Facilities; Commitment to Solve Global Problems, Improve Lives of Millions March 5th, 2015

Anousheh Ansari Wins the National Space Society's Space Pioneer Award for "Service to the Space Community" March 5th, 2015

Enhanced Graphene Components for Next Generation Racing Yacht March 5th, 2015

Get ready for NanoDays! March 5th, 2015

Military

Black phosphorus is new 'wonder material' for improving optical communication March 3rd, 2015

Researchers turn unzipped nanotubes into possible alternative for platinum: Aerogel catalyst shows promise for fuel cells March 2nd, 2015

Simulating superconducting materials with ultracold atoms: Rice physicists build superconductor analog, observe antiferromagnetic order February 23rd, 2015

New nanogel for drug delivery: Self-healing gel can be injected into the body and act as a long-term drug depot February 19th, 2015

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

Anousheh Ansari Wins the National Space Society's Space Pioneer Award for "Service to the Space Community" March 5th, 2015

Enhanced Graphene Components for Next Generation Racing Yacht March 5th, 2015

Rice's Stephan Link honored for nanoscience research: The Welch Foundation honors ‘rising star’ with $100,000 Hackerman Award February 26th, 2015

Cutting-edge technology optimizes cancer therapy with nanomedicine drug combinations: UCLA bioengineers develop platform that offers personalized approach to treatment February 24th, 2015

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 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE