Navigation Links
New nanocrystalline diamond probes overcome wear
Date:11/11/2009

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.

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."


'/>"/>

Contact: Kyle Delaney
k-delaney@northwestern.edu
847-467-4010
Northwestern University
Source:Eurekalert

Related biology technology :

1. NC State breakthrough results in super-hard nanocrystalline iron that can take the heat
2. A breakthrough toward industrial production of fluorescent nanodiamonds
3. Nanoscience Instruments, Inc. Introduces All-Diamond AFM Probes
4. University of Pennsylvania engineers reveal what makes diamonds slippery at the nanoscale
5. Magellan Biosciences Names Steven E. Diamond, PhD, Chief Scientific Officer
6. Carbon Design Innovations, Inc. Introduces Carbon Nanotube Probe Technology for Atomic Force Microscopy, CNT-Probes Deliver New Level of AFM Imaging Performance
7. Intrinsic Bioprobes, Inc. Enters into a $1.27M Contract with the National Cancer Institute to Develop Multiplex Mass Spectrometric Immunoassays for Detection of Low Abundance Cancer-Related Proteins
8. Nanoscience Instruments, Inc. Announces Distribution of Nascatec's Complete Line of Unique AFM Probes and Sensors
9. Carbon Nanoprobes, Inc Announces Production Agreement With Leading MEMS Foundry
10. Researchers: Molecular forklifts overcome obstacle to smart dust
11. GlaxoSmithKline Offers New Purchasing Options to Help Employers Overcome Barriers to Pandemic Stockpiling of Relenza(R)
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/12/2016)... , Feb. 12, 2016  PTC Therapeutics, Inc. ... annual STRIVE (Strategies to Realize Innovation, Vision and ... (DMD). STRIVE provides funds to patient advocacy organizations ... make meaningful contributions to the rare disease community ... of future patient advocates. Mary ...
(Date:2/11/2016)... 2016  Vermillion, Inc. (NASDAQ: VRML ), a ... the formation of the Steering Committee for its Pelvic ... --> Pelvic masses can present physicians and healthcare ... pregnancy is ruled out, pelvic masses may include cancers ... benign ovarian tumors and gastrointestinal and urinary tract masses. ...
(Date:2/11/2016)... 2016  Wellcentive today announced it has been ... -based community care organization (CCO) with more ... quality reporting and care management solutions and services. ... of quality managers, analysts and care managers while ... serving FamilyCare members. Oregon ...
(Date:2/11/2016)... , Feb. 11, 2016   BioInformant announces ... "Stem Cell Research Products, Opportunities, Tools, and Technologies – ... The ... the stem cell industry, BioInformant has more than a ... stem cell market, by stem cell type. This powerful ...
Breaking Biology Technology:
(Date:2/3/2016)... -- Vigilant Solutions announces today that the ... solved two recent hit-and-run cases with the ... Solutions. Brian Wenberg explains, "I was ... out of a convenience store and witnessed an elderly male back out ... his vehicle and leaving the scene.  In his statement ...
(Date:2/2/2016)... 2, 2016  BioMEMS devices deployed in ... on medical screening and diagnostic applications, such ... devices that facilitate and assure continuous monitoring ... are being bolstered through new opportunities offered ... acquisition coupled with wireless connectivity and low ...
(Date:2/2/2016)... NEW YORK , Feb. 2, 2016 /PRNewswire/ ... Potentials of that Rising Market Are you ... new analysis forecasts revenues for checkpoint inhibitors. Visiongain,s ... world market, submarket, product and national level. ... Instead discover what progress, opportunities and revenues those ...
Breaking Biology News(10 mins):