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:10/30/2014)... FREMONT, Calif. , Oct. 30, 2014 /PRNewswire/ ... clinical-stage biopharmaceutical company focused on cardio-renal, gastrointestinal and ... third quarter 2014 financial results on Thursday, November ... team will host a live conference call and ... financial results and provide a business update. ...
(Date:10/30/2014)... 2014 Deep Research Report on Global ... and in-depth research report on the China Naltrexone ... including its definition, classification, application, and industry chain ... covers the international market analysis, including China’s domestic ... macroeconomic environment & economic situation analysis. The report ...
(Date:10/30/2014)... (PRWEB) October 30, 2014 ... collaboration provider, offers Office 365 end users the ... a complete phone system by adding voice enablement ... (O365) includes Lync Online, a communication tool that ... calls. With hosted voice, O365 becomes a comprehensive ...
(Date:10/30/2014)... October 30, 2014 James Sherley says he ... adult tissue stem cell technology since his days as a ... Philadelphia in the late 1990’s. Sherley founded the ASCTC ... company holds all the intellectual property developed in Sherley’s research ... the Massachusetts Institute of Technology (MIT), and more recently as ...
Breaking Biology Technology:Ardelyx to Report Third Quarter 2014 Financial Results on November 6, 2014 2Naltrexone HCL Market & Nalbuphine HCL Industry Analysis for Global, China Regions Now at DeepResearchReports.com 2Naltrexone HCL Market & Nalbuphine HCL Industry Analysis for Global, China Regions Now at DeepResearchReports.com 3SoundConnect Launches Voice Enablement and Hybrid Audio Conferencing for Office 365 2SoundConnect Launches Voice Enablement and Hybrid Audio Conferencing for Office 365 3Boston’s Adult Stem Cell Technology Center, LLC Introduces A New Technology for Monitoring Previously Elusive Adult Stem Cells 2Boston’s Adult Stem Cell Technology Center, LLC Introduces A New Technology for Monitoring Previously Elusive Adult Stem Cells 3Boston’s Adult Stem Cell Technology Center, LLC Introduces A New Technology for Monitoring Previously Elusive Adult Stem Cells 4
... - Transaction Includes $10 Million in Upfront Fees ... ACCESS PHARMACEUTICALS, INC.,(OTC Bulletin Board: ACCP) and Milestone ... definitive license agreement under which,Milestone will market Access, ... Milestone is a company recently started by former,executives ...
... Radiopharmaceutical production facility to support clinical development for ... lead drug candidate and ... Inc., a,privately-held radiopharmaceutical company that designs, develops and,manufactures products ... it has completed commissioning its in-house manufacturing,capability to meet ...
... /Xinhua-PRNewswire-FirstCall/ -- Lotus,Pharmaceuticals, Inc. (OTC Bulletin Board: LTUS) ("Lotus" or ... today announced financial results for the quarter and six months,ended ... -- Total revenues increased to $19.4 million, up 51.4% from ... -- Gross profit was $9.7 million, up 76.4% from the ...
Cached Biology Technology:Access Pharmaceuticals Licenses MuGard to Milestone Biosciences, LLC for North America 2Access Pharmaceuticals Licenses MuGard to Milestone Biosciences, LLC for North America 3Cellectar, Inc. Begins GMP Production 2Lotus Pharmaceuticals Announces Second Quarter 2008 Results 2Lotus Pharmaceuticals Announces Second Quarter 2008 Results 3Lotus Pharmaceuticals Announces Second Quarter 2008 Results 4Lotus Pharmaceuticals Announces Second Quarter 2008 Results 5Lotus Pharmaceuticals Announces Second Quarter 2008 Results 6Lotus Pharmaceuticals Announces Second Quarter 2008 Results 7Lotus Pharmaceuticals Announces Second Quarter 2008 Results 8Lotus Pharmaceuticals Announces Second Quarter 2008 Results 9Lotus Pharmaceuticals Announces Second Quarter 2008 Results 10Lotus Pharmaceuticals Announces Second Quarter 2008 Results 11Lotus Pharmaceuticals Announces Second Quarter 2008 Results 12Lotus Pharmaceuticals Announces Second Quarter 2008 Results 13Lotus Pharmaceuticals Announces Second Quarter 2008 Results 14Lotus Pharmaceuticals Announces Second Quarter 2008 Results 15
(Date:10/30/2014)... Oct. 29, 2014  Securus Technologies, a ... technology solutions for public safety, investigation, corrections ... deployed exciting enhancements to its THREADS™ product, ... provide actionable intelligence and focused leads for ... drive technological innovation through identifying and delivering ...
(Date:10/29/2014)... kind to date, researchers have used DNA sequencing to ... autism. Joseph Buxbaum, Ph.D., Icahn School of Medicine at ... Institute of Harvard and MIT, and their colleagues examined ... and unrelated people. They identified changes in 107 genes ... autism spectrum disorder (ASD) – a jump from the ...
(Date:10/29/2014)... and environmental, have been blamed for increasing the ... as a family history of schizophrenia, are widely ... gondii , a parasite transmitted by soil, undercooked ... skepticism. , A new study by Gary Smith, ... University of Pennsylvania,s School of Veterinary Medicine, used ...
Breaking Biology News(10 mins):Securus Technologies Adds Advanced Features to Its Industry-Leading Investigative Analytics Product 2Penn vet professor investigates parasite-schizophrenia connection 2Penn vet professor investigates parasite-schizophrenia connection 3
... Access to Research Careers) Program has announced the travel ... of Chicanos and Native Americans in Science (SACNAS) annual ... These awards are meant to promote the entry of ... mainstream of the basic science community and to encourage ...
... Fox Foundation for Parkinson,s Research and Shake It Up ... Sydney,s Garvan Institute of Medical Research to look at ... Long non-coding RNAs are complex molecules, produced from ... in the body. Unlike conventional genes, they do not ...
... have increasingly relied on the wild and weedy relatives of ... and other traits. But just like all wild plant species, ... decline and extinction due to habitat loss, pollution, and climate ... describe the latest efforts to identify and protect the wild ...
Cached Biology News:Garvan Institute receives grant to research role of long non-coding RNAs in Parkinson's disease 2Protecting the weedy and wild kin of globally important crops 2
Troponin I Immunogen: Full length native protein (purified) (Human). Storage: -20 C, Avoid Freeze/Thaw Cycles...
...
Microlite 1+ 1x12 Strip assembled, flat bottom; the ideal vessel for low signal luminescent reactions, offering medium binding with enhanced dynamic range, extra high reflectivity and minimal cross t...
... pressurized syringe holder for any researcher who needs: ... Microinjecting Fine microliter delivery Small ... any new or existing perfusion rig - from ... to house air or a compressor (30 to ...
Biology Products: