Research and Professional Experience

1. Senior Research Scientist II, Energy and Environment Directorate, Pacific Northwest National Laboratory (2014-current). Leading a RT3 (Particle Interactions) for DOE-BES/IDREAM EFRC and a project related to colloid-facilitated radionuclides transport under DOE/Office of Nuclear Energy. Leading projects for PNNL NPSI related to colloid-rheology and for PNNL MS3 related to mineral nanoparticle self-assembly.

2. Senior Research Scientist I, Energy and Environment Directorate, Pacific Northwest National Laboratory (2008-2013). Served as a key technical personnel for a number of projects associated with Hanford tank waste slurries/pretreatment processes and rheology of cementitious wastes.

3. Guest Researcher, Polymer Division, National Institute of Standard and Technology(2007-2008). Developed a new experimental technique to fractionate singlewall carbon nanotubes by length and chirality.  Characterized single-wall carbon nanotubes by static/dynamic light scattering and fluorescence spectroscopy.

4. Postdoctoral Researcher, Princeton University (2003-2006). Developed a new quantitative theory on van der Waals torques in molecular self-assembly adsoprtions of nano-crystallite aggregations. Developed the mechanism for E-field induced structural regulation of micellar structure in nanoscopic silica organic/inorganic composites.

5. Research Scientist/Engineer, Polymers Division, LG Chemical Ltd. (Rep. of Korea)(1993-1998). Investigated the reaction kinetics for grafting emulsion polymerization to develop novel thermoplastic polymer composites. Studied scale-up problems on coagulation of emulsions.

Publications/Patents/Copyrights/Software Systems Developed

1. Pednekar, S.; Chun, J.; Morris, J. F., Bidisperse and Polydisperse Suspension Rheology at Large Solid Fraction. J. Rheology 2018, 62, 513-526. DOI:https://doi.org/10.1122/1.5011353

2. Prakash, A.; Pfaendtner, J.; Chun, J.; Mundy, C. J., Quantifying the Molecular-Scale Aqueous Response to the Mica Surface. J. Phys. Chem. C 2017, 121, 1849618504.
DOI:10.1021/acs.jpcc.7b03229

3. Li, D.; Wang, H.; Xiao, D.; Song, M.; Legg, B.; Chun, J., Investigating the Magnitude and Source of Orientation-dependent Interactions between TiO2
Crystal Surfaces. Nanoscale2017, 9, 10173-10177. DOI: 10.1039/C7NR03535G

4. Li, D.; Chun, J.; Xiao, D.; Zhou, W.; Cai, H.; Zhang, L.; Rosso, K. M.; Mundy, C. J.; Schenter, G. K.; De Yoreo, J. J., Trends in Mica-Mica Adhesion Reflect the Influence of Molecular Details on Long-range Dispersion Forces Underlying Aggregation and Coalignment.  Proc. Nat. Acad. Sci. 2017, 114, 7537-7542. DOI:https://doi.org/10.1073/pnas.1621186114

5. Pednekar, S.; Chun, J.; Morris, J. F., Simulation of Shear Thickening in Attractive Colloidal Suspensions. Soft Matter 2017, 13, 1773–1779. DOI: 10.1039/C6SM02553F

6. Chun, J.; Mundy, C. J.; Schenter, G. K., The Role of Solvent Heterogeneity in Determining the Dispersion Interaction between Nanoassemblies. J. Phys. Chem. B 2015, 119, 5873–5881. DOI: 10.1021/jp512550c.

7. Rolfe, B. A.; Chun, J.; Joo, Y. L. Dynamics of Micelle-nanoparticle Systems undergoing Shear: A Coarse-grained Molecular Dynamics Approach. Soft Matter 2013, 9, 1029410305.DOI: 10.1039/C3SM52194J

8. Chun, J.; Li, J.-L.; Car, R.; Aksay, I. A.; Saville, D. A., Anisotropic Adsorption of Molecular Assemblies on Crystalline Surfaces. J. Phys. Chem. B 2006, 110, 16624–
16632. DOI: 10.1021/jp062572x.

9. Chun, J.; Koch, D. L.; Rani, S. L.; Ahluwalia, A.; Collins, L. R., Clustering of Aerosol Particles in Isotropic Turbulence. J. Fluid Mech. 2005, 536, 219–251. DOI: 10.1017/S0022112005004568.

10. Chun, J.; Koch, D. L., A Direct Simulation Monte Carlo Method for Rarefied Gas Flows in the Limit of Small Mach Number. Phys. Fluid 2005, 17, 107107. DOI: 10.1063/1.2107807.

Synergistic Activities

1. A review panelist for NSF Particulate and Multiphase Processes program (Division of
Chemical, Bioengineering, Environmental, and Transport Systems), 2011–Current.

2. F1000 Associate Faculty member for biophysics and computational biology, 2011–
Current.

3. President for US-Korean Institute Chemical Engineers Chapter, 2017-Current.

4. Organizing chair/co-chair for the turbulent flow session under Fluid Mechanics Division (AIChE annual meeting), 2011, 2012, 2014, and 2016.

5. Active peer-reviewer for many journals including Proceedings of National Academy of
Science, Journal of Fluid Mechanics, Soft Matter, The Journal of Chemical Physics, Journal of Colloid and Interface Science, Biophysical Journal, Chemical Engineering Science, Colloids and Surfaces A, and RSC Advances, 2008–Current