Vahid Vahdat

 

Phone Number: 215-898-4591
Email: vvahdat@seas.upenn.edu
Lab: 112 Towne

Education:

Ph.D. Candidate, Mechanical Engineering, (expected: 2013)
M.S., Mechanical Engineering, (2004), Villanova University
B.S., Mechanical Engineering, (1998), Sharif University of Technology

 

 

 

Research:

Currently, I am investigating the tip-sample interaction forces/stresses of AFM probes operating in amplitude modulation atomic force microscopy (AM-AFM) mode. Quantifying the tip-sample interaction forces/stresses is crucial to the study of nanoscale wear of AM-AFM probes which is the focus of my Ph.D. research. Characterizing and understanding wear mechanisms of AM-AFM probes pose a significant challenge due to the dynamics and the intermittent nature of the contact. I’m also working on characterization and optimization of ultrananocrystalline diamond AFM probes using AFM, TEM, and numerical analysis.

Publications:

  • S. Kadlecek, V. Vahdat, T. Nakayama, D. Ng, K. Emami, and R. Rizi, “A simple and low-cost device for generating hyperpolarized contrast agents using parahydrogen.”, NMR Biomed, (2011) 24, 933-942.
  • V. Vahdat, K. Emami, J.M. Woodburn, R.V. Cadman, J. Yu, H. Kim, M. Ishii, and R.R. Rizi, “Validation of Regional Compliance Measurement Using Hyperpolarized¬†3He MRI in a Syringe Lung Phantom.”¬†Proc. of ISMRM, 16th Scientific Meeting & Exhibition Toronto, Canada, (2008).
  • V. Vahdat, S. Santhanam, and Y.W. Chun, “A Numerical Investigation on the Use of Drawbeads to Minimize Ear Formation in Deep Drawing”, J. Mater. Proc. Technol., (2006) 176, 70-76.
  • V. Vahdat, S. Kadlecek, S. Rajaei, J. Yu, K. Emami, J.M. Woodburn, M. Ishii, F. Hammond, and R.R. Rizi, “Method for Continuous Measurement of Nuclear Para State Enrichment in Hydrogen Gas with Applications to Hyperpolarized Heteronuclear Contrast Agent”, Proc. of ISMRM, 14th Scientific Meeting & Exhibition, Seattle, Washington, (2006).
  • E.V. McAssey, V. Vahdat, G. LeMunyan, and G. Renda, “Thermal Management of a Fast UV Slitless Spectrometer for a Meteor Research Experiment”, Heat Transf. Div. ASME, (2005) 4, 721-728.

Awards:

  • Best Animation Award, The Nano/Bio Interface Center,¬†October 2011
  • The Philadelphia Section of STLE Scholarship, Society of Tribologists and Lubrication Engineers, May 2012
  • Third Place Poster Award, 18th International Conference of Wear of Materials, April 2011
  • Best Theis Award, Iranian Society of Mechanical Engineers, October 1999