August 28, 2019


Dr. Khare and Drs. Cravens, Swanson and Watson have been awarded an NSF-MRI grant to bring an atomic force microscope to Gonzaga!
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November 15, 2018

Nano Letters paper on Nanotribological Printing is featured on! Click the image to read the article!

Nano Letters paper on Nanotribological Printing is featured on! Click the image to read the article!

Nanotribological Printing was a featured technology for the 2017 Penn Y-Prize

The aim of our research is to better understand the operating physical and chemical processes which drive material behavior at sliding (i.e., tribological) interfaces. The overarching goal of this research is to transform reliability and efficiency of mechanical systems, as well as to enable new technologies through the development of advanced materials. Our research lies at the intersection of materials science, surface chemistry, classical mechanics, nanotechnology and precision engineering. To enable this work, we utilize experimental techniques both in-situ and ex-situ which probe length-scales ranging from 1 nm to 1 cm.

A key focus of this research is on bridging nano and macro length-scales through the design of novel measurement techniques, instruments and material systems.

Examples of active research topics in the GU Tribology Research Laboratory include:

  • Multifunctional Polymer and Metal-Matrix Nanocomposites for extreme environments

  • Novel lubricant additives and basestock: their stability, co-additive interactions and interactions with surfaces

  • Multi-scale characterization of near-surface tribological and mechanical behavior of materials

  • Novel SPM-based additive nanomanufacturing techniques

  • Design and fabrication of precision instruments for multi-scale mechanical and tribological characterization.

Refereed Journal Articles

  1. AFM at the Macroscale: Methods to Fabricate and Calibrate Probes for Millinewton Force Measurements
    N.T. Garabedian, H.S. Khare, R.W. Carpick, D.L. Burris, Tribology Letters, 67 (2019)

  2. Nanotribological Printing: A Nanoscale Additive Manufacturing Method
    H.S. Khare, N.N. Gosvami, I. Lahouij, Z.B. Milne, J.B. McClimon, R.W. Carpick, Nano Letters (2018)

  3. Nanoscale Generation of Robust Solid Films from Liquid Dispersed Nanoparticles via In-situ Atomic Force Microscopy: Growth Kinetics and Nanomechanical Properties
    H.S. Khare, I. Lahouij, A. Jackson, G. Feng, Z. Chen, G.D. Cooper, R.W. Carpick, ACS Applied Materials & Interfaces (2018)

  4. Interrelated effects of temperature and environment on wear and tribochemistry of an ultra-low wear PTFE composite
    H.S. Khare, A.C. Moore, D. Haidar, L. Gong, J.Ye, J.F. Rabolt, D. L. Burris, Journal of Physical Chemistry C, 119, 16518-16527 (2015)

  5. Quantitative characterization of solid lubricant transfer film quality
    J. Ye, H.S. Khare, D. L. Burris, Wear, 316, 133-143 (2014)

  6. Surface and sub-surface contributions of oxidation and moisture to room temperature friction of molybdenum disulfide
    H.S. Khare, D. L. Burris, Tribology Letters, 53, 329-336 (2014)

  7. The effects of environmental water and oxygen on the temperature-dependent friction of sputtered molybdenum disulfide
    H.S. Khare, D. L. Burris, Tribology Letters, 52, 485-493 (2013)

  8. The extended wedge method: AFM friction calibration for improved error tolerance to AFM misalignment, tip-offset and blunt probes
    H.S Khare, D. L. Burris, Rev. of Sci. Instruments, 84, 055108 (2013)

  9. Transfer film evolution and its role in promoting ultra-low wear of a PTFE nanocomposite
    J. Ye, H.S. Khare, D. L. Burris, Wear, 297, 1095-1102 (2013)

  10. A Quantitative Method for Measuring Nanocomposite Dispersion
    H.S. Khare, D. L. Burris, Polymer, 51, 719-729 (2010)

Patents and Disclosures

  1. Systems and Methods for Nano-Tribological Manufacturing of Nanostructures, International Patent WO/2017/044331, 2017

  2. Nano-additives enabled advanced lubricants, International Patent WO/2016/179224, 2016

Featured Publications

  1. Methods in characterization of nano-scale friction in solid lubricants
    H.S. Khare, D.L. Burris, Tribology and Lubrication Technology, September 2012

  2. Characterization of Nanoscale Surface Films in Solid Lubricants
    H.S. Khare, D.L. Burris, Tribology and Lubrication Technology, May 2012