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:7/3/2015)...  Pomerantz LLP announces that a class action lawsuit ... the "Company")(NYSE: PBYI ) and certain of its ... Court, Central District of California , ... class consisting of all persons or entities who purchased ... 2015 inclusive (the "Class Period").  This class action seeks ...
(Date:7/2/2015)... Scotland , July 2, 2015 ... Bio-tech procurement company Amici Procurement has chosen ... to help it move to Office 365. ... provides small to medium-sized companies in the bio-tech ... all aspects of the purchasing cycle to help them ...
(Date:7/1/2015)...   Decision Resources Group finds that ... are its oral administration, alternative mechanism of action, ... rheumatologists. Otezla was the first oral therapy specifically ... psoriatic arthritis in the United States ... conventional oral treatments including disease-modifying antirheumatic drugs (DMARDs), ...
(Date:7/1/2015)... 2015 Isagenix International, a leading global health ... three Silver, and three Bronze Stevie® Awards at the ... Chicago this month.The American Business ... program in the U.S. "Winning is ... developing leaders, cultivating talent, creating a unified team, and ...
Breaking Biology Technology:SHAREHOLDER ALERT: Pomerantz Law Firm Reminds Shareholders with Losses on their Investment in Puma Biotechnology, Inc. of Class Action Lawsuit and Upcoming Deadline - PBYI 2SHAREHOLDER ALERT: Pomerantz Law Firm Reminds Shareholders with Losses on their Investment in Puma Biotechnology, Inc. of Class Action Lawsuit and Upcoming Deadline - PBYI 3SHAREHOLDER ALERT: Pomerantz Law Firm Reminds Shareholders with Losses on their Investment in Puma Biotechnology, Inc. of Class Action Lawsuit and Upcoming Deadline - PBYI 4Biotech Procurement Company Moves to Office 365 with iomart 2Surveyed Rheumatologists Report That Otezla's Oral Administration is its Single Greatest Advantage Over Currently Available Treatment Options 2Surveyed Rheumatologists Report That Otezla's Oral Administration is its Single Greatest Advantage Over Currently Available Treatment Options 3Isagenix Earns Nine American Business Awards 2Isagenix Earns Nine American Business Awards 3
... ... for the synthesis lab and synthetic organic chemist - heating and cooling without an additional ... first automated chemistry development tool that requires no training, EasyMax™, and the chance to WIN ... ...
... Reinstates Booster Dose of Hib Vaccine - , , ... the sanofi-aventis Group (EURONEXT: SAN and NYSE: SNY ), ... supply of its Hib-containing vaccines to enable the return to a ... increased supply, on July 1, the U.S. Centers for Disease Control ...
... June 25 DuPont (NYSE: DD ) ... long-term business agreements related to key plant biotechnology traits ... around the world. , , These agreements ... herbicide and seed sales as well as royalties. ...
Cached Biology Technology:Register to Win a Ski Weekend and Make Your Synthesis Easier with EasyMax™: the First Automated Chemistry Development Tool That Requires No Training 2Sanofi Pasteur Responds to Nation's Need for Hib Vaccine With Increased Supply 2Sanofi Pasteur Responds to Nation's Need for Hib Vaccine With Increased Supply 3Sanofi Pasteur Responds to Nation's Need for Hib Vaccine With Increased Supply 4Sanofi Pasteur Responds to Nation's Need for Hib Vaccine With Increased Supply 5Sanofi Pasteur Responds to Nation's Need for Hib Vaccine With Increased Supply 6DuPont and Bayer CropScience Expand Collaboration With Broad License Agreements 2DuPont and Bayer CropScience Expand Collaboration With Broad License Agreements 3DuPont and Bayer CropScience Expand Collaboration With Broad License Agreements 4
(Date:6/30/2015)... To bolster its efforts and commitment to fighting cyber fraud, ... of two new team members. Dimitri ... Raviv will act as head of strategic alliances. These ... the most secure solutions for the enterprise market. ... a provider of security and management products, which was acquired ...
(Date:6/25/2015)... 2015 According to a ... & Area), Technology, Material (Optical Prism, Piezoelectric, Capacitive ... & Others) & Geography - Global Forecast to ... market is expected to reach $14,500.07 Million by ... Browse 76 market Tables and 109 Figures ...
(Date:6/24/2015)... NEW YORK , June 24, 2015 ... Systems market, over the next six years. It contains ... affect the industry, along with their impact from the ... It also discusses the industry, market, and technology ... expected that the need of concerned authorities to efficiently ...
Breaking Biology News(10 mins):HYPR Corp. Expands Biometric Authentication Team with Enterprise All Stars 2HYPR Corp. Expands Biometric Authentication Team with Enterprise All Stars 3Fingerprint Sensors Market Worth $14,500.07 Million by 2020 2Fingerprint Sensors Market Worth $14,500.07 Million by 2020 3Fingerprint Sensors Market Worth $14,500.07 Million by 2020 4Automatic Identification System Market by Class, by Platform, by Application and by Geography - Global Forecasts & Analysis to 2014 - 2020 2
... lose weight won,t need to track their daily food ... at the University of Pittsburgh. eButton -- a device ... a miniature camera, accelerometer, GPS, and other sensors -- ... need for daily self-reporting. The eButton prototype was the ...
... new method for visualizing mechanical forces on the surface of ... first detailed view of those forces, as they occur in ... been measured before: The force that one molecule applies to ... and as this cell moves and goes about its normal ...
... a bacterium that holds potential for removing toxic and ... a study by researchers with the U.S. Department of ... researchers have provided the first ever map of the ... surrounding environment. "Knowing how bacteria respond to environmental ...
Cached Biology News:Pitt researchers develop eButton, an easier way to monitor food intake, exercise, and lifestyle 2Chemists reveal the force within you 2Chemists reveal the force within you 3Berkeley Lab researchers create first of its kind gene map of sulfate-reducing bacterium 2Berkeley Lab researchers create first of its kind gene map of sulfate-reducing bacterium 3
A set of five proteins which can be used to calibrate a Matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) or Electrospray Ionization (ESI) mass spectrometer....
... modifications of Grace's medium were developed in ... 1970's. Many of these modifications were developed ... of cells derived from the cabbage looper,Tricoplusia ... as TNM-FH. The medium when properly supplemented ...
... The LIC Duet™ GST•Tag™ Ek Adaptor ... operator, ribosome binding site (rbs), ATG translation ... sequence. The GST•Tag sequence has been reported ... cases the solubility of its fusion partners. ...
...
Biology Products: