Navigation Links
Depth charge: Using atomic force microscopy to study subsurface structures
Date:6/24/2010

to use the stronger, longer-range electrostatic force (technically an EFM), measuring the interaction between the probe tip and a charged plate beneath the composite sample. What makes it work, says Zhao, is that the nanotubes are electrical conductors with high dielectric constant (a measure of how the material affects an electric field), but the polymer is a low dielectric constant material. Such huge dielectric constant differences between nanotubes and the polymer is the key to the success of this technique, and with properly chosen voltages the nanotubes show up as finely detailed fibers dispersed below the composite's surface.

The goal, according to Zhao, is to control the process well enough to allow quantitative measurements. At present the group can discriminate different concentrations of carbon nanotubes in the polymer, determine conductive networks of the nanotubes and map electric potential distribution of the nanotubes below the surface. But the measurement is quite tricky, many factors, including probe shape and even humidity affect the electrostatic force.

The team used a specially designed probe tip and a patented, NIST-designed AFM humidity chamber.** An interesting, not yet fully understood effect, says Zhao, is that increasing the voltage between the probe and the sample at some point causes the image contrast to invert, dark regions becoming light and vice versa. The team is studying the mechanism of such contrast inversion.

"We are still optimizing this EFM technique for subsurface imaging," says Zhao. "If the depth of nanostructures located from the film surface can be determined quantitatively, this technique will be a powerful tool for nondestructive subsurface imaging of high dielectric nanostructures in a low dielectric matrix, with a broad range of applications in nanotechnology."


'/>"/>

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

Page: 1 2

Related biology technology :

1. Amnis Announces Release of Its Extended Depth of Field Option for The ImageStream(R) System
2. Depth of MedImmunes Respiratory Disease Research Program Highlighted at Annual Meeting of the American Thoracic Society
3. Using carbon nanotubes in lithium batteries can dramatically improve energy capacity
4. World first remote heart operation to be carried out in Leicester using robotic arm
5. RPJ Housings Rebuilding Together Event Brings Estimated $300,000 Worth Of Volunteer Labor to Northern VA
6. Ambry Genetics Launches First X-Linked Mental Retardation Diagnostics Using Next Generation Sequencing
7. Researchers gain detailed insight into failing heart cells using new nano technique
8. Penn material scientists turn light into electrical current using a golden nanoscale system
9. Using magnetic toys as inspiration, researchers tease out structures of self-assembled clusters
10. InfoSpi to Create $500m Green Hedge Fund Focusing on the Carbon Credit Market
11. New York Plastic Surgeon Transforms His Practice Using Twitter Status Updates
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/26/2015)... LAUDERDALE, Fla. , Feb. 26, 2015 ... discussed growth priorities driven by key research advancements and ... segments at today,s Bank of America Merrill Lynch 2015 ... met the challenge of building grain supplies the last ... to continue at the pace of the last decade, ...
(Date:2/26/2015)... 2015 BioEnterprise today announced that ... than $2 billion in growth funding during the past ... strategic sources, state – including the Ohio Third Frontier ... billion has been raised in the past five years. ... of the BioEnterprise Midwest Healthcare Growth Capital  Report. ...
(Date:2/26/2015)... According to a new market report published ... Crops (Corn, Soybean, Cotton and Others), Synthetic Biology-Enabled Products ... Trends and Forecast, 2013 – 2019,”the global agricultural biotechnology ... and is expected to reach USD 28,694.1 million by ... to 2019. , Demand for food production has ...
(Date:2/26/2015)... , Feb. 26, 2015  Epic Sciences announced today ... will present at the 35th Annual Cowen and Company ... in the MIT Room, 3rd Floor. The conference will ... in Boston, Mass. Epic is developing diagnostic tests ... genomic and proteomic changes that occur during the course ...
Breaking Biology Technology:DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 2DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 3DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 4DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 5More Than $2 Billion Invested in Northeast Ohio Bioscience Start-Up Companies Since 2002 2More Than $2 Billion Invested in Northeast Ohio Bioscience Start-Up Companies Since 2002 3More Than $2 Billion Invested in Northeast Ohio Bioscience Start-Up Companies Since 2002 4Global Agricultural Biotechnology Market is Expected to Reach USD 28,694.1 Million in 2019 : Transparency Market Research 2Global Agricultural Biotechnology Market is Expected to Reach USD 28,694.1 Million in 2019 : Transparency Market Research 3Epic Sciences to Present at 35th Annual Cowen and Company Health Care Conference 2
... Inc. (Nasdaq: IDEV ) today announced the Company ... on Monday,November 3, 2008 at 8:40 AM Eastern Time. ... Renshaw 10th Annual Healthcare Conference on,Monday, November 10, 2008 ... in New York City. The presentations will be web ...
... to Advance P-552, DURHAM, N.C., Oct. 28 ... they have entered into an agreement to,co-develop Parion,s proprietary ... mouth associated with primary Sjogren,s syndrome., Under the ... P-552. Kainos will provide funding to help advance the,program ...
... SAN DIEGO, Oct. 28 Neurocrine Biosciences,(Nasdaq: NBIX ) announces the ... 2008 Financial Results, When: October 28, 2008 @ ... http://www.videonewswire.com/event.asp?id=52783 , How: Live over the Internet ... above., Contact: Claudia ...
Cached Biology Technology:Indevus Pharmaceuticals to Present at Upcoming Investor Conferences 2Indevus Pharmaceuticals to Present at Upcoming Investor Conferences 3Parion Sciences and Kainos Medicines Sign Clinical Development Agreement for Novel Dry Mouth Treatment 2Parion Sciences and Kainos Medicines Sign Clinical Development Agreement for Novel Dry Mouth Treatment 3
(Date:2/18/2015)...  Cepheid (NASDAQ: CPHD ) today announced that ... invited investors to participate via webcast. , Cowen and ... Tuesday, March 3, 2015 at 11.20 a.m. Eastern Time ... Wednesday, March 4, 2015 at 10.25 a.m. Eastern ... webcasts for these events, please visit Cepheid,s website at ...
(Date:2/10/2015)...  Alere Inc. (NYSE: ALR), a global leader ... the quarter ended December 31, 2014. ... Alere said, "We made substantial progress in the ... leader in rapid diagnostics and delivering against our ... in early January enabled us to substantially reduce ...
(Date:2/5/2015)... Jan. 26, 2015 NXT-ID, Inc. (NASDAQ: ... biometric authentication company focused on the growing mobile commerce ... ( http://www.nxt-id.com/ ) as part of its 2015 marketing ... Company launched its new consumer website for Wocketwallet.com earlier ... CEO of NXT-ID said, "Our new corporate website naturally ...
Breaking Biology News(10 mins):Cepheid to Webcast Upcoming Financial Presentations 2Alere Inc. Announces Fourth Quarter 2014 Results 2Alere Inc. Announces Fourth Quarter 2014 Results 3Alere Inc. Announces Fourth Quarter 2014 Results 4Alere Inc. Announces Fourth Quarter 2014 Results 5Alere Inc. Announces Fourth Quarter 2014 Results 6Alere Inc. Announces Fourth Quarter 2014 Results 7Alere Inc. Announces Fourth Quarter 2014 Results 8Alere Inc. Announces Fourth Quarter 2014 Results 9Alere Inc. Announces Fourth Quarter 2014 Results 10Alere Inc. Announces Fourth Quarter 2014 Results 11Alere Inc. Announces Fourth Quarter 2014 Results 12Alere Inc. Announces Fourth Quarter 2014 Results 13Alere Inc. Announces Fourth Quarter 2014 Results 14Alere Inc. Announces Fourth Quarter 2014 Results 15Alere Inc. Announces Fourth Quarter 2014 Results 16Alere Inc. Announces Fourth Quarter 2014 Results 17Alere Inc. Announces Fourth Quarter 2014 Results 18Alere Inc. Announces Fourth Quarter 2014 Results 19Alere Inc. Announces Fourth Quarter 2014 Results 20Alere Inc. Announces Fourth Quarter 2014 Results 21Alere Inc. Announces Fourth Quarter 2014 Results 22Alere Inc. Announces Fourth Quarter 2014 Results 23Alere Inc. Announces Fourth Quarter 2014 Results 24Alere Inc. Announces Fourth Quarter 2014 Results 25Alere Inc. Announces Fourth Quarter 2014 Results 26Alere Inc. Announces Fourth Quarter 2014 Results 27Alere Inc. Announces Fourth Quarter 2014 Results 28Alere Inc. Announces Fourth Quarter 2014 Results 29Alere Inc. Announces Fourth Quarter 2014 Results 30Alere Inc. Announces Fourth Quarter 2014 Results 31Alere Inc. Announces Fourth Quarter 2014 Results 32Alere Inc. Announces Fourth Quarter 2014 Results 33Alere Inc. Announces Fourth Quarter 2014 Results 34Alere Inc. Announces Fourth Quarter 2014 Results 35
... reduction in the adult sizes of aquatic animals than in ... University of London and the University of Liverpool. The ... the National Academy of Sciences ( PNAS ) shows ... affected disproportionately by warmer temperatures. This could have implications for ...
... new study show that episodes of reduced precipitation in the ... a rise in numbers of mountain pine beetles. The overabundance ... the first to chart the evolution of the current pine ... patterns of beetle outbreaks in the two primary host species, ...
... DETROIT There has been great advancements in the development ... enhancements continue to grow. Various industries have a need ... energy efficiencies, reduce emissions and pollution increase safety and ... A group of researchers in Wayne State University,s ...
Cached Biology News:Warming temperatures cause aquatic animals to shrink the most 2Drought in 2001-2002 fueled Rocky Mountain pine beetle outbreak 2Drought in 2001-2002 fueled Rocky Mountain pine beetle outbreak 3Drought in 2001-2002 fueled Rocky Mountain pine beetle outbreak 4High-strength material advancements at Wayne State University may lead to new, life-saving steel 2
Monoclonal antibodies conjugated with rhodamine...
... Both compact and lightweight, the Moticam ... microscope through the eyepiece, eyetube, or trinocular ... easy to use Plug-and-Play Images 2.0ML software ... Image manipulation tools to maximize resolution for ...
5X StabilCoat Immunoassay Stabilizer is a 5X concentrate solution of StabilCoat Immunoassay Stabilizer. The shelf-life of 5X StabilCoat Immunoassay Stabilizer is 2 years when stored at 4C. Product ...
... StabilZyme NOBLE BSA-Free Stabilizer is ... SELECT Stabilizer. It is an ... chemicals in a MOPS buffer (3-(N-Morpholino) ... and contains a combination of 0.02% ...
Biology Products: