Navigation Links
Quartz crystal microbalances enable new microscale analytic technique
Date:11/24/2010

A new chemical analysis technique developed by a research group at the National Institute of Standards and Technology (NIST) uses the shifting ultrasonic pitch of a small quartz crystal to test the purity of only a few micrograms of material. Since it works with samples close to a thousand times smaller than comparable commercial instruments, the new technique should be an important addition to the growing arsenal of measurement tools for nanotechnology, according to the NIST team.

As the objects of scientific research have gotten smaller and smalleras in nanotechnology and gene therapythe people who worry about how to measure these things have been applying considerable ingenuity to develop comparable instrumentation.* This new NIST technique is a riff on thermogravimetric analysis (TGA), an imposing name for a fairly straightforward concept. A sample of material is heated, very slowly and carefully, and changes in its mass are measured as the temperature increases. The technique measures the reaction energy needed to decompose, oxidize, dehydrate, or otherwise chemically change the sample with heat.

TGA can be used, for example, to characterize complex biofuel mixtures because the various components vaporize at different temperatures. The purity of an organic sample can be tested by the shape of a TGA plot because, again, different components will break down or vaporize at different temperatures. Conventional TGA, however, requires samples of several milligrams or more of material, which makes it hard to measure very small, laboratory-scale powder samplessuch as nanoparticlesor very small surface chemistry features such as thin films.

What's needed is an extremely sensitive "microbalance" to measure the minute changes in mass. The NIST group found one in the quartz crystal microbalance, essentially a small piezoelectric disk of quartz sandwiched between two electrodes. An alternating current across the electrodes causes the crys
'/>"/>

Contact: Michael Baum
baum@nist.gov
301-975-2763
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

Page: 1 2

Related biology news :

1. X-ray crystallography reveals structure of precursor to blood-clotting protein
2. New type of liquid crystal promises to improve performance of digital displays
3. How do your crystals grow?
4. A crystal ball for predicting the effects of global climate change
5. Cholesterol crystals incite inflammation in coronary arteries
6. Ancestral Eve crystal may explain origin of lifes left-handedness
7. Researchers envision high-tech applications for multiferroic crystals
8. Scientists watch as peptides control crystal growth with switches, throttles and brakes
9. A crystal ball for brain cancer?
10. Nanocrystals reveal activity within cells
11. Scripps scientists create first crystal structure of an intermediate particle in virus assembly
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Quartz crystal microbalances enable new microscale analytic technique
(Date:7/24/2014)... Calif. -- To reduce fire hazard in the United ... mechanically cutting woody shrubs and suppressed trees (ladder fuels). ... burned during periods of low fire danger in order ... and minimize hazardous air pollutants, managers often cover all ... plastic, commonly referred to as agricultural plastic, in order ...
(Date:7/24/2014)... into the potato genes that best adapt to the ... rainfall and increased extremes of hot and cold temperatures.The ... order to create new potato varieties that will adapt ... to find out how the current potato varieties will ... and lower temperatures. , This research is part of ...
(Date:7/24/2014)... Hundreds of fires covered central Africa in mid-July 2014, ... Multiple red hotspots, which indicate areas of increased temperatures, ... the Democratic Republic of the Congo (northeast), and Zambia ... hotspots, and in some areas, especially in the Democratic ... to the south. , The fire season is an ...
Breaking Biology News(10 mins):Study gives new perspective on agricultural plastic, debris burning, and air quality 2Neiker-Tecnalia is researching the potato genes that best adapt to climate change 2
... 14, 2008) − The accumulation of fat in the liver ... by consuming resveratrol, according to a new study with mice. ... produced in the liver of mice fed alcohol and, at ... the liver is broken down. Chronic alcohol consumption ...
... of worm grunting practiced in the Apalachicola National Forest in ... observation made by Charles Darwin. , Worm grunting involves going ... and then rubbing the top of the stake with a ... a peculiar grunting sound that drives nearby earthworms to the ...
... plant-eating predators to fight a superweed spreading throughout Britain ... a world expert on Japanese knotweed at the University ... of Biology has been researching the invasive weed since ... Hollingsworth and Catherine Pashley. Research in the ...
Cached Biology News:Resveratrol prevents fat accumulation in livers of 'alcoholic' mice 2Florida's 'worm grunters' collect bait worms by inadvertently imitating mole sounds 2Florida's 'worm grunters' collect bait worms by inadvertently imitating mole sounds 3Florida's 'worm grunters' collect bait worms by inadvertently imitating mole sounds 4'Plant-eating predator to fight superweed is not magic bullet' 2
(Date:7/24/2014)... Distinguished Professor of Engineering at the University of ... solve problems in energy engineering, environmental sustainability and ... zeolites, porous rock with a well-defined, crystalline structure. ... so precisely decided that zeolites can separate molecules ... an angstrom (one-tenth of a nanometer), making them ...
(Date:7/24/2014)... , July 24, 2014 SRI International has ... the National Institute of Allergy and Infectious Diseases (NIAID), ... preclinical development of potential therapies for HIV infection and ... treat HIV and AIDS and the complications and opportunistic ... for preventing sexual transmission of HIV. ...
(Date:7/24/2014)... N.J. , July 24, 2014 ... provider of regulatory and ethical review services for ... Alliance Biosciences. Formerly a division of ... was the leading biosafety and biosecurity consulting firm ... With this addition, WCG,s biosafety division – WCG ...
(Date:7/24/2014)... 2014   Cypher Genomics, Inc., the ... Adam Simpson as president and chief ... comprehensive annotation and interpretation of individual human genomes ... "Cypher,s technology has the potential to play a ... accuracy, optimizing therapeutic approaches and reducing adverse drug ...
Breaking Biology Technology:University of Delaware researcher describes new approach for creating organic zeolites 2National Institute of Allergy and Infectious Diseases Awards SRI International Contract to Study New Therapies for HIV and AIDS 2National Institute of Allergy and Infectious Diseases Awards SRI International Contract to Study New Therapies for HIV and AIDS 3WIRB-Copernicus Group Announces Acquisition of Alliance Biosciences; Executives Join WCG Biosafety Division 2WIRB-Copernicus Group Announces Acquisition of Alliance Biosciences; Executives Join WCG Biosafety Division 3Cypher Genomics Announces the Appointment of Adam Simpson as President and COO to Advance Transformative Genome Interpretation Technology 2Cypher Genomics Announces the Appointment of Adam Simpson as President and COO to Advance Transformative Genome Interpretation Technology 3
... ... , ... 2009 -- Surety, LLC , the leading provider of data integrity protection ... Protecting and Legally Defending the Authenticity of Your Scientific Data" on December 9, 2009. ...
... , SANTA CLARA, Calif., Dec. 7 Cell Biosciences, ... Inc. of Lexington, Massachusetts, a leader in sample preparation ... acquisition adds Protein Forest,s novel digital ProteomeChip(TM) product line ... protein analysis. , Protein Forest, founded in 2002, pioneered ...
... , , RESEARCH TRIANGLE PARK, N.C., ... innovative treatments for diseases of the central nervous system, today announced ... that CeNeRx,s novel compound TriRima (TM) reversibly inhibits MAO-A (monoamine ... role in the regulation of mood. TriRima is ...
Cached Biology Technology:Surety Leads Web Symposium to Address Data Integrity Issues in Bio-Sciences Industry 2Cell Biosciences Acquires Protein Forest 2Publication in Neuropsychopharmacology Confirms CeNeRx's Novel RIMA Antidepressant TriRima(TM) Selectively and Reversibly Inhibits MAO-A 2Publication in Neuropsychopharmacology Confirms CeNeRx's Novel RIMA Antidepressant TriRima(TM) Selectively and Reversibly Inhibits MAO-A 3Publication in Neuropsychopharmacology Confirms CeNeRx's Novel RIMA Antidepressant TriRima(TM) Selectively and Reversibly Inhibits MAO-A 4
Immunogen: Synthetic peptide (aa sequence is considered to be commercially sensitive) Storage: -20 C, Avoid Freeze/Thaw Cycles...
... Clone/PAD: ZMD.467. Immunogen: Synthetic ... of the human rat mouse dog ... Specific for the human occludin protein. ... cell lysates). Reactivity with rat ...
...
... Biochain's plant total protein ... for rapidly screening tissue specific ... Human placenta total protein is ... an interblot control for comparison ...
Biology Products: