Navigation Links
Micro microwave does pinpoint cooking for miniaturized labs
Date:11/8/2007

Researchers at the National Institute of Standards of Technology (NIST) and George Mason University have demonstrated what is probably the worlds smallest microwave oven, a tiny mechanism that can heat a pinhead-sized drop of liquid inside a container slightly shorter than an ant and half as wide as a single hair. The micro microwave is intended for lab-on-a-chip devices that perform rapid, complex chemical analyses on tiny samples.

In a paper in the November 2007 Journal of Micromechanics and Microengineering*, the research team led by NIST engineer Michael Gaitan describes for the first time how a tiny dielectric microwave heater can be successfully integrated with a microfluidic channel to control selectively and precisely the temperature of fluid volumes ranging from a few microliters (millionth of a liter) to sub-nanoliters (less than a billionth of a liter). Sample heating is an essential step in a wide range of analytic techniques that could be built into microfluidic devices, including the high-efficiency polymerase chain reaction (PCR) process that rapidly amplifies tiny samples of DNA for forensic work, and and methods to break cells open to release their contents for study.

The team embedded a thin-film microwave transmission line between a glass substrate and a polymer block to create its micro microwave oven. A trapezoidal-shaped cut in the polymer block only 7 micrometers across at its narrowestthe diameter of a red blood celland nearly 4 millimeters long (approximately the length of an ant) serves as the chamber for the fluid to be heated.

Based on classical theory of how microwave energy is absorbed by fluids, the research team developed a model to explain how their minature oven would work. They predicted that electromagnetic fields localized in the gap would directly heat the fluid in a selected portion of the micro channel while leaving the surrounding area unaffected. Measurements of the microwaves produced by the system and their effect on the fluid temperature in the micro channel validated the model by showing that the increase in temperature of the fluid was predominantly due to the absorbed microwave power.

Once the new technology is more refined, the researchers hope to use it to design a microfluidic microwave heater that can cycle temperatures rapidly and efficiently for a host of applications.


'/>"/>

Contact: Michael E. Newman
mnewman@nist.gov
301-975-3025
National Institute of Standards and Technology (NIST)  
Source:Eurekalert

Related biology news :

1. Tips from the Journals of the American Society for Microbiology
2. Princeton engineers develop low-cost recipe for patterning microchips
3. Society for General Microbiology 161st Meeting, University of Edinburgh
4. American Society for Microbiology honors Lucas R. Hoffman
5. American Society for Microbiology honors Joanna Kubler-Kielb
6. American Society for Microbiology honors Hung Ton-That
7. American Society for Microbiology honors Thomas E. Wellems
8. American Society for Microbiology honors Jason T. Blackard
9. American Society for Microbiology honors Michael Bruce Zwick
10. New microsensor measures volatile organic compounds in water and air on-site
11. Scientists decipher mechanism behind antimicrobial hole punchers
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Micro microwave does pinpoint cooking for miniaturized labs
(Date:12/20/2016)... RALEIGH, N.C. and GENEVA, Dec, 20, 2016 ... performance biometric data sensor technology, and STMicroelectronics ... across the spectrum of electronics applications, announced today ... scalable development kit for biometric wearables that includes ... integrated with Valencell,s Benchmark™ biometric sensor ...
(Date:12/15/2016)... Canada and BADEN-BADEN, Germany , ... a leading global financial services provider, today announced an agreement ... passive behavioural biometrics, to join forces. The partnership will enable ... mitigation strategies in compliance with local data protection regulation. ... In order ...
(Date:12/15/2016)... , Dec. 14, 2016 "Increase in mobile ... market" The mobile biometrics market is expected to grow ... billion by 2022, at a CAGR of 29.3% between ... such as the growing demand for smart devices, government ... "Software component is expected to grow at ...
Breaking Biology News(10 mins):
(Date:1/19/2017)... DUBLIN , Jan 19, 2017 Research and ... has announced the addition ... - Material, Application - Forecast to 2025" report to ... The report provides a detailed analysis on current ... Market forecasts till 2025, using estimated market values as the base numbers ...
(Date:1/19/2017)... Jan. 19, 2017  ArmaGen, Inc., today announced ... Ph.D., as chief executive officer, as well as ... brings to ArmaGen more than 17 years of ... development of biotherapeutics and pharmaceuticals. ... diverse experience and skillset necessary to lead ArmaGen ...
(Date:1/19/2017)... NY (PRWEB) , ... January 19, 2017 , ... FireflySci ... an exponential rate. The tremendous growth is accounted to two main factors. ... table and the expanding network of vendors supplying FireflySci products all around the world. ...
(Date:1/19/2017)... 2017 Acupath Laboratories, Inc., a leading provider ... an Executive Committee that will guide the company,s vision ... John Cucci , a 15-year veteran of the anatomic ... Development to Chief Sales Officer .  Prior to ... senior sales leadership roles at several leading lab industry ...
Breaking Biology Technology: