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CV

Prasoon Diwakar

 
Office Address:
Center for Materials Under eXtreme Environment (CMUXE)
304 A Potter Bldg, 500 Central Drive,
West Lafayette, IN 47907.
Ph (O): (765) 494 6984
Ph (Cell): (352) 870 3473
Email: pdiwakar@purdue.edu
pdf version of CV
 
 

Education

Ph.D in Mechanical Engineering Aug 2009

Advisor: Prof. D.W. Hahn, Department of Mechanical and Aerospace Engineering

Thesis title: “Laser-induced plasmas as an analytical source for quantitative analysis of gaseous and aerosol systems: Fundamentals of plasma-particle interactions”

University of Florida, Gainesville, FL

M.S. in Mechanical Engineering Aug 2006

University of Florida, Gainesville, FL

B.Tech in Mechanical Engineering May 2003

Indian Institute of Technology, Kanpur, India


Professional Experience

Post-Doctoral Associate 2012 – present

Center for Materials Under eXtreme Environment (CMUXE), Purdue University (link)

Research Topic: Femotsecond LIBS and Laser ablation-ICP-MS; High Energy Density Plasmas

National Research Council Post-Doctoral Associate 2009 – 2012

National Institute for Occupational Safety and Health, CDC Cincinnati

Research Topic: Development of novel direct reading instruments for real-time measurement of fine and ultra-fine aerosols using plasma spectroscopy techniques (LIBS/SIBS/MIPS).

Graduate Research Assistant 2004 – 2009

Department of Mechanical and Aerospace Engineering, University of Florida

Research Topic: Study of plasma-particle interactions in Laser-induced plasmas; Study of soot formation using Laser-induced incandescence.

Visiting Scientist March 2009

Institute of Analytical Sciences, Dortmund, Germany

Research Topic: Investigation of single particle atomization in ICP.

Research Associate Fall 2003

Department of Mechanical Engineering, Indian Institute of Technology, Kanpur, India

Research Topic: Design and simulation of Heat Exchangers using Artificial Neural Networks.

Student Research Assistant Summer 2002

CNR-TEMPE, Laboratorio di Combustione e Diagnostiche Laser, Milano, Italy

Research Topic: Two dimensional imaging of soot volume fraction in flames using two color emission technique and extinction methods.

Summer Internship Summer 2001

Research and Development, TVS-Suzuki Motors, Hosur, India

Research Topic: Optimization of suspension parameters of two-wheelers using stochastic linear control theory.


Refereed Publications

  1. P.K. Diwakar, S.S. Harilal, M.C. Phillips, A. Hassanein, 2014. Ultrafast laser ablation plume dynamics in ambient Argon (Submitted)
  2. P.K. Diwakar, J. Gonzalez, S.S. Harilal , R.E. Russo , A. Hassanein, 2014. Ultrafast laser ablation ICP-MS: Role of spot size, laser fluence, and repetition rate on signal intensity and elemental fractionation. Journal of Analytical Atomic Spectrometry (DOI: 10.1039/C3JA50315A)
  3. P.K. Diwakar, P.S. Kulkarni, 2014. Matrix effect due to easily ionizable element (Na) on Chromium (I) emission in low energy laser-induced plasma. (Submitted)
  4. S. S. Harilal, N. Farid, J. R. Freeman, P. K. Diwakar, N.  L. LaHaye, and A. Hassanein, 2014. Background gas collisional effects on expanding fs and ns laser ablation plumes. Applied Physics A, 1-8. weblink
  5. N.L. LaHaye, S.S. Harilal, P.K. Diwakar, A. Hassanein, 2013. The effect of laser pulse duration on ICP-MS signal intensity, elemental fractionation, and detection limits in fs-LA-ICP-MS. Journal of Analytical Atomic Spectrometry, 28, 1781-1787 pdf.
  6. S.S. Harilal, P.K. Diwakar, A. Hassanein, 2013. Electron-ion relaxation time dependent signal enhancement in ultrafast double-pulse laser-induced breakdown spectroscopy. Applied Physics Letters 103. pdf
  7. P.K. Diwakar, S.S. Harilal , N.L. LaHaye , A. Hassanein, P. Kulkarni, 2013. The influence of laser pulse duration and energy on ICP-MS signal intensity, elemental fractionation, and particle size distribution in NIR fs-LA-ICP-MS. Journal of Analytical Atomic Spectrometry (web link)
  8. N.L. LaHaye , S.S. Harilal , P.K. Diwakar, A. Hassanein, P. Kulkarni, 2013. The effect of ultrafast laser wavelength on ablation properties and implications on sample introduction in inductively coupled plasma mass spectrometry. J. of App. Physics. 114, Art. No. 023103 pdf
  9. P.K. Diwakar, S.S. Harilal, J.R. Freeman and A. Hassanein, 2013. Role of laser pre-pulse wavelength and inter pulse delay on signal enhancement in collinear double-pulse laser-induced breakdown spectroscopy. Spectrochimica Acta B Spectrochimica Acta B, 87, 43-50 pdf
  10. J.R. Freeman, S.S. Harilal, P.K. Diwakar, B. Verhoff B, and A. Hassanein, 2013.  Comparison of optical emission from ns and fs LPP in atmosphere and  vacuum conditions  Spectrochimica Acta B  87, 65-73. pdf
  11. A. E. Hussein, P.K. Diwakar, S.S. Harilal, A. Hassanein, 2013. The role of laser wavelength on plasma generation and expansion of ablation plumes in air. J. of App. Physics. 113 Art. No. 143305. pdf
  12. B. Verhoff, S.S. Harilal, J. Freeman, P.K. Diwakar, and A. Hassanein, 2012. Dynamics of femto- and nanosecond laser ablation plumes investigated using optical emission spectroscopy.  J. of Applied Physics, 112 Art. No. 093303. pdf
  13. S.S. Harilal, G.V. Miloshevsky, P.K. Diwakar, N.L. LaHaye, and A. Hassanein, 2012. Experimental and computational study of complex shockwave dynamics in laser ablation plumes in Argon atmosphere. Physics of Plasmas, 19 Art. No.083504. pdf
  14. P.K. Diwakar, P.S. Kulkarni, 2012. Measurement of Elemental Concentration of Aerosols Using Spark Emission Spectroscopy. Journal of Analytical Atomic Spectrometry, 27. Web link
  15. P.K. Diwakar, K.H. Loper, A.M. Matiaske, D.W. Hahn, 2012. Laser-induced breakdown spectroscopy for analysis of micro- and nanoparticles. Web link
  16. P.K. Diwakar, P.S. Kulkarni, M.E. Birch, 2012. New approach for near-real-time measurement of elemental composition of aerosols using laser induced breakdown spectroscopy. Aerosol Science and Technology, 46:316-332. web link
  17. P.K. Diwakar, S. Groh, K. Niemax, D.W. Hahn, 2010. Study of analyte dissociation and diffusion in laser-induced plasmas:  Implications for laser-induced breakdown spectroscopy. Journal of Analytical Atomic Spectrometry, 25:1921-1930. pdf
  18. S. Groh, P.K. Diwakar, C.C. Garcia, A. Murtazin, K. Niemax, D.W. Hahn, 2010. 100% efficient sub-nanoliter sample introduction in laser-induced breakdown spectroscopy and inductively coupled plasma spectrometry: Implications for ultralow sample volumes. Analytical Chemistry, 82: 2568-2573. pdf
  19. P.K. Diwakar, D.W. Hahn, 2008. Study of early laser-induced plasma dynamics: transient electron density gradients via Thomson scattering and the implications on LIBS measurements. Spectrochimica Acta B, 63:1038-1046. pdf
  20. P.K. Diwakar, P. B. Jackson, D. W. Hahn, 2007. Investigation of multi-component aerosol particles and the effect on quantitative laser-induced breakdown spectroscopy: consideration of localized matrix effects. Spectrochimica Acta B, 62, 1466-1474. pdf
  21. C. A. Henry, P.K. Diwakar, D.W. Hahn, 2007. Investigation of helium addition for laser-induced plasma spectroscopy of pure gas phase systems: analyte interactions and signal enhancement. Spectrochimica Acta B, 62, 1390-1398. pdf
  22. B.C. Windom P.K. Diwakar, D.W. Hahn, 2006. Dual-pulse LIBS for analysis of gaseous and aerosol systems: plasma-analyte interactions, Spectrochimica Acta B, 61, 788-796. pdf
  23. G.D. Yoder P.K. Diwakar, D.W. Hahn, 2005. Assessment of soot particle vaporization effects during laser-induced incandescence using time-resolved light scattering. Applied Optics, 44, 4211-4219. pdf

Manuscript in Preparation 

  • P.K. Diwakar, J.R. Freeman, S.S. Harilal, A. Hassanein. Mechanisms leading to signal enhancement in YAG:CO2 double-pulse laser-induced breakdown spectroscopy
  • P.K. Diwakar, H. Cooper,  S.S. Harilal, A. Hassanein. Provenance study of native copper using fs-LA-ICP-MS

Patent

  •  P Kulkarni, PK Diwakar, “Method and apparatus for aerosol analysis using optical spectroscopy”, US Patent #US20130148117 A1. weblink1 weblink2  pdf
  •  P Kulkarni , P Efthimion , PK Diwakar , “Method for spectrochemical analysis of aerosols using microwave plasma spectroscopy”, CDC Employee Invention Report filed, patent application pending.

Poster Presentations/Conference Proceedings

  • FACSS 2011, Oct 2011, Reno,  2011. “Role of Analyte Diffusion in Laser-Induced Plasmas. “
  • 30th Annual AAAR Conference, Orlando,  Oct 2011. “Near Real-time Elemental Analysis of Aerosols Using Spark-induced Breakdown Spectroscopy.”
  • 3rd North American Symposium on LIBS, Clearwater, Jul 2011.”Corona-Assisted Microwave Plasma Spectroscopy (CAMPS) for Aerosol Analysis.”
  • 29th American Association for Aerosol Research Annual Conference, Portland, Oregon, October 25-29, 2010 “Semi-Continuous Measurement of Elemental Composition of Aerosol Particles Using Laser Induced Breakdown Spectroscopy” 
  • 29th American Association for Aerosol Research Annual Conference, Portland, Oregon, October 25-29, 2010. “Matrix Effects in Laser-Induced Breakdown Spectroscopy”  
  • 6th International Conference on Laser-Induced Breakdown Spectroscopy 2010 (LIBS 2010), Memphis,USA, Sep 13-17, 2010.“Novel Approach for Analysis of Fine and Ultra-fine Aerosol Particles Using Laser Induced Breakdown Spectroscopy”  
  • 2nd North American Symposium on LIBS, New Orleans, USA. Jul 2009 “Investigation of Plasma-Particle Interactions in LIBS by Introduction of Single Droplet (Picolitre Volume) in the Plasma”
  • 2nd North American Symposium on LIBS, New Orleans, USA. Jul 2009 “Elemental Distribution in Fish Scales Using LIBS and LA-ICP-MS Methods”
  • 2nd North American Symposium on LIBS, New Orleans, USA. Jul 2009 “LIBS and LA-ICP-MS Complementary Study of Uroliths”
  • European Winter Conference on Plasma Spectrochemitry, Graz, Austria. Feb 2009 “LIBS, LA-ICPMS and synchrotron hard X-ray micro-radiography and micro-tomography complementary study of elemental distributions in biominerals”
  • 5th International Conference on Laser-Induced Breakdown Spectroscopy, Berlin, Germany. Sept 2008 “Temporal investigation of aerosol particles and early plasma dynamics on single isolated analyte droplets”
  • Conference on Lasers and Electro-Optics (CLEO), San Jose,CA. May 2008 “Laser-induced breakdown spectroscopy (LIBS) for aerosol analysis”
  • 4th International Conference on Laser-Induced Breakdown Spectroscopy, Montreal, Canada. Sept 2006 “Investigation of multi-component aerosol particles and the effect on quantitative analysis: consideration of thermal matrix e®ects”
  • 29th International Symposium of Combustion, Sapporo, Japan. Jul 2002 “Quantitative two-dimensional imaging of soot volume fraction in flames”

Awards

Research Interests

Specialization includes the areas of laser-based diagnostic methods, plasma spectroscopy, aerosol measurement and instrumentation and thermal sciences.

Specific areas of research interest include development of LIBS, fundamentals of plasma-particle interactions, aerosol systems, aerosol chemical composition measurement, real-time instrumentation, study and diagnostics of environmental pollutants and combustion diagnostics.

Experience in experimental techniques include Laser-Induced Breakdown Spectroscopy (LIBS),Spark Spectroscopy, Microwave-Induced Plasma Spectroscopy, Rayleigh Scattering, Thomson Scattering, Laser Induced Incandescence (LII), Laser Induced Fluorescence (LIF), Raman Spectroscopy, Single Particle analysis, Plasma-Particle Imaging, Inductively Coupled Plasma.

Professional and Service Organizations

Member of Optical Society of America, American Chemical Society, Society for Applied Spectroscopy, American Association for Aerosol Research, Combustion InstituteNorth American Society for Laser-Induced Breakdown Spectroscopy

Secretary-Elect and Council member of North American Society for Laser Induced Breakdown Spectroscopy (NASLIBS)

Member of Esther Hoffman Beller Award Committee 2012-2013

Member of OSA Jean Bennet  Travel Grant Review Committee

OSA Member Advisory Network

Reveiwer of Journal of Analytical Atomic Spectrometry, Physical Chemistry Chemical Physics, Analyst, Optics Letters, Optics Express, Applied Spectroscopy, Analytical Chemistry, Applied Optics, AIChE Journal, Spectrochimica Acta B, Physics of Plasmas, Aerosol and Air Quality Research, RSC Advances, Optical Materials Express, NIOSH manuscripts.

President of Florida chapter of charity organization Asha for Education, 2006-2008.