Nanotechnology Now





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > New nanocrystalline diamond probes overcome wear

Abstract:
Researchers at the McCormick School of Engineering and Applied Science at Northwestern University have developed, characterized, and modeled a new kind of probe used in atomic force microscopy (AFM), which images, measures, and manipulates matter at the nanoscale.

New nanocrystalline diamond probes overcome wear

Evanston, IL | Posted on November 12th, 2009

Using diamond, researchers made a much more durable probe than the commercially available silicon nitride probes, which are typically used in AFM to gather information from a material, but can wear down after several uses.

Horacio Espinosa, James and Nancy Farley Professor of Manufacturing and Entrepreneurship, and his graduate student Ravi Agrawal have shown that diamond atomic force microscopy probes are 10 times more durable than silicon nitride probes.

Their results were recently published in the Journal of Applied Physics.

"It is well-known that diamond should perform much better than other probe materials," says Espinosa. "However, rigorous quantification of wear and the development of models with predictive capabilities have remained elusive. It was exciting to discover that diamond probes are an order of magnitude more wear resistant than silicon nitride probes and that a single model can predict wear for both materials."

In the study, wear tests were performed using AFM probes made from different materials — silicon nitride, ultrananocrystalline diamond (UNCD) and nitrogen-doped UNCD — by scanning them across a hard UNCD substrate. Argonne National Laboratory, where UNCD was originally invented, also supported this work by providing nitrogen-doped UNCD. Probes were made in house and also provided by Advanced Diamond Technologies, Inc. (ADT).

"It took quite an effort to develop UNCD into a sharp tip. We needed to optimize the initial stages of diamond growth to form nanometer structures with consistent results. It is really nice to find that this work paid off to demonstrate that UNCD probes are quite wear resistant, which we predicted," said Nicolaie Moldovan, a former research professor at Northwestern University involved in the fabrication of the UNCD probes. Moldovan is now a microfabrication expert at Advanced Diamond Technologies, Inc.

In addition to characterizing the probe, researchers also created a model that can predict how a probe tip will wear.

"The development of a general model with predictive capabilities is a major milestone. This effort also provided insight into how the interfacial adhesion between the probe and substrate relates to the wear resistance of AFM probes," says Agrawal.

Neil Kane, president of ADT, said, "The results reported in this investigation are impressive in showing the improvement in wear resistance of diamond probes. This work in part inspired the development of our commercially available NaDiaProbes®."

###

The paper, authored by Agrawal, Moldovan, and Espinosa, was also selected for the October 5, 2009 issue of the Virtual Journal of Nanoscale Science and Technology (www.vjnano.org), which is an edited compilation of links to articles from participating publishers covering a focused area of frontier research.

####

About Northwestern University
Northwestern University combines innovative teaching and pioneering research in a highly collaborative environment that transcends traditional academic boundaries. It provides students and faculty exceptional opportunities for intellectual, personal and professional growth in a setting enhanced by the richness of Chicago.

For more information, please click here

Contacts:
Kyle Delaney

847-467-4010

Copyright © Eurekalert

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Nanostructures Increase Corrosion Resistance in Metallic Body Implants May 24th, 2015

Iranian Scientists Use Magnetic Field to Transfer Anticancer Drug to Tumor Tissue May 24th, 2015

Basel physicists develop efficient method of signal transmission from nanocomponents May 23rd, 2015

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Announcements

Nanostructures Increase Corrosion Resistance in Metallic Body Implants May 24th, 2015

Iranian Scientists Use Magnetic Field to Transfer Anticancer Drug to Tumor Tissue May 24th, 2015

Basel physicists develop efficient method of signal transmission from nanocomponents May 23rd, 2015

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Tools

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Nanometrics Announces Live Webcast of Upcoming Investor and Analyst Day May 20th, 2015

Taking control of light emission: Researchers find a way of tuning light waves by pairing 2 exotic 2-D materials May 20th, 2015

DELMIC announces a workshop hosted by Phenom World on Integrated CLEM to be held on Wednesday June 24th at the Francis Crick Institute (Lincoln Inn Fields Laboratory). May 19th, 2015

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project