Kaiwen (Kevin) Tian

 

                                                        

img_3723 Email: kaiwtian@sas.upenn.edu | Office: 112 Towne

 

 

Education:

  • Ph.D. Candidate, Physics and Astronomy ( expected in August 2017 ), University of Pennsylvania
  • B.S., Physics, ( 2011 ), University of Science and Technology of China

Research Interests:

My current research interests are broadly in understanding friction and other surface mechanical properties (like adhesion) at the nanoscale, and the applications of atomic force microscope (AFM) to a wide range of fields. Specifically, I am interested to establish physically-based rate and state friction (RSF) laws for nanoscale single asperity contact. Conventional RSF laws, which are widely used to describe friction for macroscale contacts, especially seismic rocks, are largely empirical. If physically-based RSF laws for nanoscale contacts could be established, besides their wide application for nano-devices, they could also help understand conventional RSF laws from a fundamental perspective, which could give rise to a deeper and better understanding of earthquakes.

Also, I am interested in soft matter physics, including jamming transition, which was the focus of my research when I was an undergraduate.

 

Publications:

  • Load and Time Dependence of Interfacial Chemical Bond-Induced Friction at the Nanoscale, Kaiwen Tian, Nitya N. Gosvami, David L. Goldsby, Yun Liu, Izabela Szlufarska, and Robert W. Carpick, Phys. Rev. Lett. 118, 076103 (2017)
  • New jamming scenario: From marginal jamming to deep jamming, Cang Zhao, Kaiwen Tian, and Ning Xu, Phys. Rev. Lett. 106, 125503 (2011)
  • Non-logarithmic ageing behavior at small timescales in nanoscale contacts, Kaiwen Tian, Yun Liu, Nitya N. Gosvami, David L. Goldsby, Izabela Szlufarska, and Robert W. Carpick, in preparation.
  • Memory distance in friction, Kaiwen Tian, Nitya N. Gosvami, David L. Goldsby, and Robert W. Carpick, in preparation.
  • Mini earthquakes: stick-slip phenomena for interfacial-chemical-bond induced friction at the nanoscale, Kaiwen Tian, Nitya N. Gosvami, David L. Goldsby, and Robert W. Carpick, in preparation.
  • Physically-based rate and state friction laws at the nanoscale, Kaiwen Tian, David L. Goldsby, and Robert W. Carpick, in preparation.

 

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Awards:

  • Outstanding Students Silver Award, 2008, USTC
  • The National Encouragement Scholarship, 2009, USTC
  • Outstanding Students Silver Award,  2010, USTC
  • Tribology and Lubrication Engineering Society (STLE) Philadelphia chapter scholarship, 2016