Nanotechnology Now

Our NanoNews Digest Sponsors


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

Animal study shows flexible, dissolvable silicon device promising for brain monitoring: Other applications include post-operative observation for vascular, cardiac, and orthopaedic procedures, finds Penn study May 5th, 2016

Speedy ion conduction in solid electrolytes clears road for advanced energy devices May 5th, 2016

Engineers create a better way to boil water -- with industrial, electronics applications May 5th, 2016

Clues on the path to a new lithium battery technology: Charging produces highly reactive singlet oxygen in lithium air batteries May 5th, 2016

Announcements

Speedy ion conduction in solid electrolytes clears road for advanced energy devices May 5th, 2016

Engineers create a better way to boil water -- with industrial, electronics applications May 5th, 2016

Clues on the path to a new lithium battery technology: Charging produces highly reactive singlet oxygen in lithium air batteries May 5th, 2016

Unique nano-capsules promise the targeted drug delivery: Russian scientists created unique nano-capsules for the targeted drug delivery May 5th, 2016

Tools

Oxford Instruments Asylum Research and McGill University Announce the McGill AFM Summer School and Workshop, May 12-13, 2016 May 4th, 2016

The intermediates in a chemical reaction photographed 'red-handed' Researchers at the UPV/EHU-University of the Basque Country have for the first time succeeded in imaging all the steps in a complex organic reaction and have resolved the mechanisms that explain it May 4th, 2016

New tool allows scientists to visualize 'nanoscale' processes May 4th, 2016

FEI Launches Apreo – Industry-Leading Versatile, High-Performance SEM: The Apreo SEM provides high-resolution surface information with excellent contrast, and the flexibility to accommodate a large range of samples, applications and conditions May 4th, 2016

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







Car Brands
Buy website traffic