Harshad Pathak


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Arbetar vid Fysikum
Telefon 08-553 787 14
Besöksadress Roslagstullsbacken 21
Rum D6:3011
Postadress Fysikum 106 91 Stockholm

Om mig

Experienced in nucleation, aerosol science, liquid jet set-up, experiments at ultrabright X-ray sources and building a lab. You can view my publication list towards the end of this content.


Doctor of Philosophy (Ph.D.), Chemical Engineering, December 2013,

The Ohio State University (OSU), Columbus, Ohio

Research Adviser: Dr. Barbara Wyslouzil

Master of Science (M.S.), Chemical Engineering, June 2011 

Bachelor of Chemical Engineering, June 2008

Institute of Chemical Technology (ICT), Mumbai, India                       


Post-doctoral researcher, Physics, Stockholm University, 

March 2015 – present

  • Developed an experimental set-up in a newly formed research group to experimentally study supercooled water using liquid jet and droplet trains.
  • Travelled to state-of-the-art synchrotrons and X-ray Free Electron Laser (XFEL) sources with the experimental set-up to study structure and dynamics of supercooled water.
  • Developing a method to measure droplet temperature and subsequently, heat capacities of supercooled microdroplets.
  • Working on developing an experimental set-up to study amorphous ices with X-rays under high pressures and find a liquid liquid critical point (LLCP) of water.

Chemical Engineer, Humic Growth Solutions, Jacksonville, USA,

Jan 2014 – Jan 2015

  • Improved existing liquid fertilizer formulations by setting up a chemistry lab and ensured proper scale-up of liquid fertilizers from lab-scale to industrial scale.

Graduate Research Associate, The Ohio State University, 

Sept 2008 – December 2013

  • Developed a novel analytical technique by combining Beer-Lamberts’ law with linear regression in MATLAB to study the nanodroplets of water, nonane and their mixtures quantitatively through Fourier transform infrared (FTIR) spectroscopy.
  • Integrated pressure profile measurements with FTIR and SAXS by modifying a set of differential equations in Fortran to accurately calculate the experimental parameters like temperature and density.
  • Among 65 selected candidates (USA nationwide competition) for the “12th National School on Neutron and X-ray Scattering” In June 2010 to study principles of scattering theory.
  • Worked in a multi-national team to coordinate and analyze SAXS experiments at the Advanced Photon Source (APS) in Argonne National Laboratory (ANL).
  • Designed and constructed an experimental set-up to successfully study ice and frozen alkane nanodroplets using ultrafast X-ray laser at SLAC National Accelerator Laboratory.

Research Project, Institute of Chemical Technology,

Feb – May 2008

  • Designed a plant to manufacture 1 tonne per day of potato protein from a potato starch waste stream.
  • Performed detailed calculations for chromatography and ultrafiltration, equipment design and economic feasibility study.

Intern, Aquapharm Chemicals Pvt. Ltd., Pune, India,

May – June 2007

  • Designed a shell-tube heat exchanger for condensing xylene vapors.
  • Studied the safety measures and environmental norms of the chemical engineering processes of the plant.


  • Travel grant from the National Science Foundation to attend the 19th International Conference on Nucleation and Atmospheric Aerosols in Fort Collins, Colorado (June 2013).
  • Outstanding Graduate Award for Academic Achievement by the William Lowrie Department of Chemical Engineering, Ohio State University (April 2013).
  • Travel grant from the American Association of Aerosol Research (AAAR) to attend the 31st Annual AAAR Conference in Minneapolis, MN (October 2012).
  • University Fellowship (tuition waiver and monthly stipend) from OSU Graduate School on the basis of outstanding academic record (September 2008 – August 2009).
  • Winner in ‘Industry-defined Problem’ –in the Annual Chemical Engineering Symposium held at Indian Institute of Technology (IIT), Mumbai (March 2007).


  • Discussion Leader, Keynote session: Frontiers in the Theory of Liquids, Gordon Research Seminar: Liquids, Chemistry and Physics of, Holderness, NH, USA (August 2017).
  • Volunteer for Association for India’s Development (AID) fundraisers (September 2008 – December 2012).
  • Head of Safety at the Aerosol Research Laboratory at OSU. Responsible for the classification and disposal of used chemicals from the lab and participation in meetings to improve safety in the Chemical Engineering Department (June 2011 – April 2013).
  • Member of the Core Organizing Committee – First Annual Graduate Research Symposium of OSU Chemical Engineering Department (February – August 2012).
  • Chief Financial Officer for ‘MANZAR’ – first inter-college cultural event at ICT. Responsible for managing a budget (~$40,000), allocating resources and maintaining account books (January – March 2007).
  • Treasurer for ‘PRODIGY’ – a national-level technical symposium at ICT. Responsible for managing a budget (~$24,000) and interacting with corporate sponsors (January – March 2008).



Graduate Teaching Assistant, The Ohio State University, Sept 2009 –Dec 2012    

  • Freshman Engineering: Trained students to write programs in MATLAB and utilize Autodesk Inventor for engineering graphics; graded homework and exams, and conducted office hours.   
  • Air Pollution (ChBE 771): Conducted tutorials and occasionally delivered lectures to a class of about 30 students for three academic terms; graded homework and exams, and conducted office hours.




  • A. Amaya, H. Pathak, et al. How cubic can ice be?, Journal of Physical Chemistry Letters, 2017, 8(14), 3216-3222.
  • H. Pathak et al. The structure of D2O-nonane nanodroplets, Journal of Chemical Physics, 2014, 140, 224318
  • H. Pathak et al. Co-condensation of Nonane and D2O in a supersonic nozzle, Journal of Chemical Physics 2014, 140, 034304.
  • H. Pathak et al. Nonisothermal Droplet Growth in the Free Molecular Regime, Aerosol Science and Technology 2013, 47, 1310-1324.
  • S. Tanimura, H. Pathak, and Barbara Wyslouzil. Binary nucleation rates for ethanol/water mixtures in supersonic Laval nozzles: Analyses by the first and second nucleation theorems, Journal of Chemical Physics 2013, 139, 174311.
  • A. Bhabhe, H. Pathak, and Barbara Wyslouzil. Freezing of heavy water (D2O) nanodroplets, Journal of Physical Chemistry A 2013, 117, 5472-5482.
  • V. Modak, H. Pathak, et al. Experimental evidence of surface freezing in supercooled n-alkane nanodroplets, Physical Chemistry Chemical Physics 2013, 15, 6783-6795.
  • A. Manka, H. Pathak, et al. Freezing water in no-man’s land. Physical Chemistry Chemical Physics 2012, 14, 4505-4516.

PUBLICATIONS from Post doctoral work

  • H. Pathak, J.C. Palmer, D. Schlesinger, K.T. Wikfeldt, J.A. Sellberg, L.G.M. Pettersson, and A. Nilsson. The structural validity of various thermodynamical models of supercooled water, Journal of Chemical Physics 2016, 145, 134507.
  • F. Perakis, K. Amann-Winkel, F. Lehmkühler, M. Sprung, D. Mariedahl, J.A. Sellberg, H. Pathak, A. Späh, F. Cavalca, D. Schlesinger, A. Ricci, A. Jain, B. Massani, F. Aubree, C.J. Benmore, T. Loerting, G. Grübel, L.G.M. Pettersson, and A. Nilsson, Diffusive dynamics during the high-to-low density transition in amorphous ice, Proceedings of the National Academy of Sciences of the USA 2017, 114 (31), 8193-8198
  • K.H. Kim, H. Pathak, A. Späh, F. Perakis, D. Mariedahl, J.A. Sellberg, T. Katayama, Y. Harada, H. Ogasawara, L.G.M. Pettersson, and A. Nilsson, Temperature-Independent Nuclear Quantum Effects on the Structure of Water, Physical Review Letters 2017, 119, 075502.


  • H. Pathak, J. Palmer, D. Schlesinger, T. Wikfeldt, J. Sellberg, L. Pettersson, and A. Nilsson, Structural validity of various water models, Gordon Research Conference: Liquids, Chemistry and Physics of, Holderness, NH, USA (August 2017)
  • H. Pathak, L-P. Wang, J. Palmer, D. Schlesinger, T. Wikfeldt, J. Sellberg, L. Pettersson and A. Nilsson, Liquid-liquid critical point of water: comparing models with experimental data, WaterX- Exotic properties of water under extreme conditions, Nice, France (July 2016)
  • H. Pathak, J. Wölk, R. Strey and B. Wyslouzil, 19th International Conference on Nucleation and Atmospheric Aerosols, Co-condensation of Nonane and D2O in a Supersonic Nozzle, Fort Collins, Colorado (June 2013).
  • H. Pathak, B. Wyslouzil, A. Obeidat and G. Wilemski, 19th International Conference on Nucleation and Atmospheric Aerosols, The Structure of Aqueous-Alkane Nanodroplets, Fort Collins, Colorado (June 2013).
  • H. Pathak, K. Mullick, B. Wyslouzil and S. Tanimura, 31st Annual American Association of Aerosol Research (AAAR) Conference, Nonane and D2O non-equilibrium droplet growth in the free molecular regime, Minneapolis, MN, USA (October 2012).
  • H. Pathak, B. Wyslouzil, J. Wölk, D. Bergmann and R. Strey, 85th American Chemical Society (ACS) Colloids and Surface Science Symposium, Nucleation of Nonane and D2O in a supersonic nozzle, Montreal, Canada  (June 2011).
  • H. Pathak, D. Bergmann, B. Wyslouzil, J. Wölk and R. Strey, 29th Annual AAAR  Conference, Nonane and D2O droplet growth in a supersonic nozzle, Portland, OR, USA (October 2010).

Senast uppdaterad: 29 juli 2019

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