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

Research Expertise

My current research focus is in understanding functional mechanisms of lubricant additives and additive interactions in low viscosity base stock, using in-situ atomic force microscopy (AFM). Specifically, I am using single-asperity and colloidal probe AFM to elucidate the role of mechanochemistry in driving sliding-induced growth of surface tribofilms and the evolution of interfacial friction. These studies are aimed at improving our basic scientific understanding of lubricant additive mechanisms in order to enable development of advanced materials for surface coatings, lubricant additives as well as lubricant base stock.

My broader research interests include:

  • Novel lubricant additives, basestock, additive interactions and surface coatings
  • Multi-scale interfacial science and mechanics of materials
  • Development of novel AFM-based additive nanomanufacturing methods
  • Multifunctional Polymer and Metal-Matrix Nanocomposites for extreme environments
  • Nanoscale tribology and mechanics of lamellar (2D) materials
  • Machine design, control and instrumentation for microscale and in-situ tribometry

Refereed Journal Articles (PDF copies available upon request)

  1. Nanotribological Printing: A Nanoscale Additive Manufacturing Method
    H.S. Khare, N.N. Gosvami, I. Lahouij, Z.B. Milne, J.B. McClimon, R.W. Carpick (in review)

  2. 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 (in review)

  3. 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)

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

  5. 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)

  6. 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)

  7. 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)

  8. 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)

  9. 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

Conference Proceedings
          A Quantitative Metric for Nanocomposite Dispersion Analysis
          H.S. Khare, D.L. Burris, Proc. STLE Annual Meeting & Exhibition (2010)