• Spring 2008 - PHYS 4574 "Nanotechnology"

 
• General Course Web Page

 
• "Introduction to Nanoscale Science and Technology" Textbook edited by M. Di Ventra, S. Evoy, and J.R. Heflin

 

(L to R) Annalisa Pawlosky, Vaibhav Jain, Cemil Durak, Jason Ridley, Erika Gifford, RH, Anamika Gopal, Zhiyong Wang
 

• Organic Second Order Nonlinear Optical Materials Fabricated from Ionic Self-Assembled Multilayers (ISAMs)  

 
• Plasmonic Enhancement of Nonlinear Optical Responses by Metal Nanoparticles in ISAMs  

 
• Second Order Nonlinearities in Silica Fibers and Microspheres Induced by Polar Self-Assembled Multilayers  

 
• Self-Assembly of Ionic Liquid Electromechanical Actuators  

 
• Polymer Photovoltaics with Nanoscale Control of Morphology by Thermally-Induced Interdiffusion and ISAMs 

 
• Optical Fiber Long Period Grating Sensors with Self-Assembled Affinity Coatings 

 
• Silica Nanoparticle ISAM Antireflection Coatings 

 
• MEMS Gas Chromatography with ISAM Stationary Phases 

 
• Rapid-Switching Self-Assembled Electrochromic Devices 

 

• 2006 - present: Professor of Physics, Virginia Tech 
 
• 1998 - 2006: Associate Professor of Physics, Virginia Tech 
 
• 2001 - present: Associate Director of Center for Self-Assembled Nanostructures and Devices (CSAND) 
 
• 1998 - present: Adjunct Associate Professor of Materials Science and Engineering 
 
• 2001 - present: Associate Editor of International Journal of Nanoscience 
 
• 2000 - 2004: Co-Chair of OSA/ACS "Organic Thin Films for Photonic Applications" Annual Symposium  
 
• 2004 - present: Program Committee Member of "Conference on Lasers and Electro-Optics (CLEO)"  
 
• 2001 - 2006: Organizing Committee Member of SPIE "Linear and Nonlinear Optics of Organic Materials" Annual Symposium  
 
• 1992 - 1998: Assistant Professor of Physics, Virginia Tech 
 
• 1990 - 1992: Postdoctoral Fellow, Dept. of Physics, Univ. of Pennsylvania 

 
 

• 1995: Cottrell Scholars Award (Research Corporation) 
 
• 1990: Elias Burstein Award for Outstanding Ph.D. Thesis (Dept. of Physics, University of Pennsylvania) 
 
• 1983: Phi Beta Kappa (College of William and Mary) 

 
 

• 1984 - 1990: Ph.D. in Physics, Dept. of Physics, University of Pennsylvania 
 
• 1980 - 1984: B.S. in Physics with High Honors, Minor in Computer Science, College of William and Mary 
 
 

• U.S. Patent #6,953,607 "Polar Ordering of Reactive Chromophores in Layer-by-Layer Nonlinear Optical Materials," K.E. Van Cott, J.R. Heflin, H.W. Gibson, R.M. Davis (2005). 
 
• U.S. Patent #7,336,861 "Fiber Optic Sensor or Modulator Using Tuning of Long Period Gratings with Self-Assembled Layers," Z. Wang, J.R. Heflin, S. Ramachandran (2008). 
 
 

• "Second Order Parametric Processes in Nonlinear Silica Microspheres," Y. Xu, M. Han, A. Wang, Z. Liu, J.R. Heflin, Phys. Rev. Lett. 100, 163905:1-4 (2008).  

 
• "Modification of Single-Walled Carbon Nanotube Electrodes by Layer-by-Layer Assembly for Electrochromic Devices," V. Jain, H.M. Yochum, R. Montazami, J.R. Heflin, L. Hu, G. Gruner, J. Appl. Phys. 103, 074504:1-5 (2008).  

 
• "Millisecond Switching in Sold-State Electrochromic Polymer Devices Fabricated from Ionic Self-Assembled Multilayers," V. Jain, H.M. Yochum, R. Montazami, J.R. Heflin, Appl. Phys. Lett. 92, 033304:1-3 (2008).  

 
• "Solid-state Electrochromic Devices via Ionic Self-Assembled Multilayers of a Polyviologen," V. Jain, H. Yochum, H. Wang, R. Montazami, M.A.V. Hurtado, A. Mendoza-Galvan, H.W. Gibson, J.R. Heflin, Macromol. Chem. Phys. 209, 150-157 (2008).  

 
• "Plasmon-Enhanced Second Harmonic Generation from Ionic Self-Assembled Multilayer Films," K. Chen, C. Durak, J.R. Heflin, H.D. Robinson, Nano Lett. 7, 254-258 (2007).  

 
• "Proposal and Analysis of a Silica Fiber with a Large and Thermodynamically Stable Second Order Nonlinearity," Y. Xu, A. Wang, J.R. Heflin, Z. Liu, Appl. Phys. Lett. 90, 211110:1-3 (2007).  

 
• "Efficient, Thermally-Stable, Second Order Nonlinear Response in Organic Hybrid Covalent/Ionic Self-Assembled Films," J.R. Heflin, M.T. Guzy, P.J. Neyman, K.J. Gaskins, C. Brands, Z. Wang, H.W. Gibson, R.M. Davis, K.E. Van Cott, Langmuir 22, 5723-5727 (2006).  

 
• "The Influence of Void Space on Antireflection Coatings of Silica Nanoparticle Self-Assembled Films," S.E. Yancey, W. Zhong, J.R. Heflin, A.L. Ritter, J. Appl. Phys. 99, 034313:1-10 (2006).  

 
• "Analysis of Optical Response of Long-Period Fiber Gratings to nm-Thick Thin-Film Coatings," Z. Wang, J.R. Heflin, R.H. Stolen, S. Ramachandran, Opt. Express 13, 2808-2813 (2005).  

 
• "Highly Sensitive Optical Response of Optical Fiber Long Period Gratings to Nanometer-thick Ionic Self-assembled Multilayers," Z. Wang, J.R. Heflin, R.H. Stolen, S. Ramachandran, Appl. Phys. Lett. 86, 223104:1-3 (2005).  

 
• "Improved Morphology of Polymer-Fullerene Photovoltaic Devices with Thermally-Induced Concentration Gradients," M. Drees, R.M. Davis, J.R. Heflin, J. Appl. Phys. 97, 036103:1-3 (2005).  

 
• "Thickness Dependence, in situ Measurements, and Morphology of Themally-controlled Interdiffusion in Polymer-C60 Photovoltaic Devices," M. Drees, R.M. Davis, J.R. Heflin, Phys. Rev. B 69, 165320:1-6 (2004).  

 
• "Creation of a Gradient Polymer-Fullerene Interface in Photovoltaic Devices by Thermally Controlled Interdiffusion," M. Drees, K. Premaratne, W. Graupner, J.R. Heflin, R.M. Davis, D. Marciu, M. Miller, Appl. Phys. Lett. 81, 4607-4609 (2002).  

 
• "Layer-by-Layer Deposition and Ordering of Low Molecular Weight Dye Molecules for Second Order Nonlinear Optics," K. Van Cott, M. Guzy, P. Neyman, C. Brands, J.R. Heflin, H.W. Gibson, R.M. Davis, Angew. Chem. Int. Ed. 41, 3236-3238 (2002).  

 
• "Electrochromic Behavior of Ionically Self-Assembled Thin Films," J.A. Janik, J.R. Heflin, D. Marciu, M.B. Miller, R.M. Davis, MRS Symp. Proc. 660, JJ8.20.1-6 (2001). 

 
• "Characterization of Polymer Light-Emitting Diodes Fabricated by Ionically Self-Assembled Monolayer Technique," D. Marciu, M.B. Miller, J.R. Heflin, M.A. Murray, A.L. Ritter, P.J. Neyman, W. Graupner, H. Wang, H.W. Gibson, and R.M. Davis, Mater. Res. Soc. Proc. Vol. 598, BB11.50.1-6 (2000). 

 
• "Thickness Dependence of Second Harmonic Generation in Thin Films Fabricated from Ionically Self-Assembled Monolayers," J.R. Heflin, C. Figura, D. Marciu, Y. Liu, and R.O. Claus, Appl. Phys. Lett. 74, 495 (1999). 

 
• "Enhanced Nonlinear Optical Reponse of an Endohedral Metallofullerene through Metal-to-Cage Charge Transfer," J.R. Heflin, D. Marciu, C. Figura, S. Wang, P. Burbank, S. Stevenson, and H.C. Dorn, Appl. Phys. Lett. 72, 2788 (1998). 

 
• "Optical Limiting Over an Extended Spectral Region by Derivatization of C60," J. R. Heflin, D. Marciu, C. Figura, S. Wang, R. Yordanov, and J.C. Withers, in Nonlinear Optical Liquids and Power Limiters, C.M. Lawson, ed., SPIE Vol. 3146, 142 (1997). 

 
• "Excited State Enhancement of Optical Nonlinearities in Linear Conjugated Molecules," D. C. Rodenberger, J. R. Heflin, and A. F. Garito, Nature 359, 309 (1992).