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Vivek Prabhu (Fed)

Research Interests:
Current research interests in self-assembly and supramolecular assembly of polymers and polyelectrolytes for advanced materials in drug delivery, organic electronics, and formulations. Expertise in leading research for the Semiconductor industry by development of methods to determine resolution limits of photo-patternable polymer thin films. Developer of new methods to measure the redox transformations of aqueous dispersed nanoparticles towards oxidative stress mechanisms. Active in the scientific community through chair, at-large member and committee participation. Experimental expertise and interests in the development and application of static and dynamic light scattering, fluorescence correlation spectroscopy, and x-ray and neutron scattering and reflectivity for polymer research.

Professional Background:

  • 2019-present: acting Group Leader, Polymers and Complex Fluids
  • 2015 -present: Project Leader, Polyelectrolyte Solutions and Gels
  • 2007-2013:Project Leader, Nanoparticle Assembly
  • 2003-2010: Project Leader, Polymers for Next Generation Lithography
  • 2003-Present: Chemical Engineer, Materials Science and Engineering Division (Polymers Division)
  • 2001-2003: NRC-NIST Postdoctoral Fellow, Polymers Division

Awards and Honors:

  • ACS Award for Team Innovation (w/ C. Soles, E. Lin, and W. Wu) (2019)
  • MML Grass Roots Safety Award (2014)
  • Sigma Xi Young Investigator Award (2010)
  • NIST Slichter Award (2007)
  • National Academy of Engineering Frontiers of Engineering (2005)
  • NRC-NIST Postdoctoral Fellowship (2001-2003)
  • NIH Chemistry-Biology Interface fellowship (1999-2001)

Recent External Service:

  • ACS PMSE Fellows Section Committee (2017-present)
  • Chair, CNMS User Executive Committee, Oak Ridge National Laboratory (2014).
  • SRC Member, Neutron Sciences, Oak Ridge National Laboratory (2014-2017)
  • Center for Nanophase Materials Sciences (CNMS) User Executive Committee,Oak Ridge National Laboratory(2011-2015).
  • Program Advisory Committee, SPIE Microlithography Conference (2006-2010).

Recent Invited Presentations:

  • Characterization of photoresist fundamentals by scattering and spectroscopic methods, ACS Award for Team Innovation, ACS National Meeting, Orlando, Florida 3/31/2019
  • Cooperative micelle to cluster self-assembly in oligocarbonate-functionalized PEG telechelic polymers, Max-Planck-Institut für Polymerforschung, Mainz, Germany. 11/5/2018.
  • Measurement and modeling of polymers for therapeutic materials. Friedrich-Alexander-Universität, Erlangen, Germany. 11/2/2018.
  • Measurement and modeling of polymers for therapeutic materials. Joint Workshop JCNS 2018 Trends and Perspectives in Neutron Instrumentation: Advanced simulation and open source software in neutron scattering, Tutzing, Germany. 10/29/2018.
  • Characterization of the transient networks formed by oligocarbonate-functionalized PEG telechelic polymers, Jülich Centre for Neutron Research, Heinz-Maier-Leibnitz Zentrum, Garching, Germany. 9/27/2018.
  • Characterization of the transient networks formed by oligocarbonate-functionalized PEG block copolymers, ACS National Meeting, New Orleans, LA 3/20/2018
  • Hierarchical structure and dynamics of oligocarbonate-functionalized PEG block copolymer gels. ACS Polymer Chemistry Award Symposia in Honor of Professor M. Muthukumar, ACS National Meeting, San Francisco, CA. 4/5/2017
  • "Hierarchical structure and dynamics of triblock copolymer solutions." Gordon Research Conference on Colloids, Macromolecular and Polyelectrolyte solutions, Ventura, CA 2/10/2016.



59. S. Ali and VM Prabhu, Characterization of the Ultralow Interfacial Tension in Liquid−Liquid Phase Separated Polyelectrolyte Complex Coacervates by the Deformed Drop Retraction Method, Macromolecules 52, 7495-7502 (2019).

58. S Adhikar, VM Prabhu, and M Muthukumar, Lower Critical Solution Temperature Behavior in Polyelectrolyte Complex Coacervates, Macromolecules 52, 6998-7004 (2019).

57. S Ali, M Bleuel, VM Prabhu, Lower Critical Solution Temperature in Polyelectrolyte Complex Coacervates, ACS Macro Letters, 8, 289-293 (2019).

56. M Andreev, VM Prabhu, JF Douglas, M Tirrell, JJ de Pablo, Complex Coacervation in Polyelectrolytes from a Coarse-Grained Model, Macromolecules 51, 6717 (2018).

55. A Rahalkar, G Wei, R Nieuwendaal, VM Prabhu, S Srivastava, AE Levi, JJ de Pablo, MV Tirrell, Effect of temperature on the structure and dynamics of triblock polyelectrolyte gels, J. Chem. Phys. 149, 163310 (2018).

54. S Ali and VM Prabhu, Relaxation Behavior by Time-Salt and Time-Temperature Superpositions of Polyelectrolyte Complexes from Coacervate to Precipitate, Gels 4, 11 (2018).

53. S Venkataraman, KP Mineart, JL Hedrick, YY Yang and VM Prabhu, Cholesterol functionalized aliphatic N-substituted 8-membered cyclic carbonate, Polymer Chemistry, 9, 2434 (2018).

52. KP Mineart, S Venkataraman, YY Yang, JL Hedrick and VM Prabhu, Fabrication and Characterization of Hybrid Stealth Liposomes, Macromolecules, 51, 3184 (2018).

51. Y Yang, V Reipa, G Liu, Y Meng, XH Wang, KP Mineart, VM Prabhu, WY Shi, NJ Lin, XS He, JR Sun,, pH-Sensitive Compounds for Selective Inhibition of Acid-Producing Bacteria, ACS Applied Materials & Interfaces, 10, 8566 (2018).

50. KP Mineart, EG Kelley, M Nagao, VM Prabhu, Processing-structure relationships of poly(ethylene glycol)-modified liposomes, Soft Matter, 13, 5228 (2017).

49. GM Wei, S Venkataraman, JL Hedrick, YY Yang and VM Prabhu, Enthalpy-driven micellization of oligocarbonate-fluorene end-functionalized Poly(ethylene glycol), Polymer, 134, 94 (2018).

48. GM Wei, VM Prabhu, VA Piunova, AC Carr, WC Swope, RD Miller, Spatial Distribution of Hydrophobic Drugs in Model Nanogel-Core Star Polymers, Macromolecules, 50, 9702 (2017).

47. GM Wei, S Venkataraman, VM Prabhu, JL Hedrick, and YY Yang. Self-Assembly and Dynamics Driven by oligocarbonate Fluorene End-Functionalized Poly(ethylene glycol) ABA Triblock Copolymers, Macromolecules, 50, 1090 (2017).

46. S Srivastava, M Andreev, AE Levi, DJ Goldfeld, J Mao, WT Heller, VM Prabhu, JJ de Pablo and MV Tirrell. Gel phase formation in dilute triblock copolyelectrolyte complexes, Nature Communications DOI: 10.1038/ncomms14131 (2017).

45. VM Prabhu, V Reipa, AJ Rondinone, E Formo and PV Bonnesen, Development of in situ Electrochemical Small-Angle Neutron Scattering (eSANS) for Simultaneous Structure and Redox Characterization of Nanoparticles Material, ECS Transactions, 72 (2) 179-188 (2016). Invited Article.

44.V.M. Prabhu et al. "Equilibrium self-assembly, structure and dynamics of clusters of star-like micelles," ACS Macro Letters, 4, 1128 (2015).

43.V.M. Prabhu et al. "Star-like structure of oligocarbonate-fluorene end-functionalized poly(ethylene glycol) ABA triblock copolymers below the gel point." Macromolecular Symposia, 358, 157-169 (2015).

42.S Venkataraman, AL Lee,HT Maune, JL Hedrick, VM Prabhu, YY Yang, Formation of Disk- and Stacked-Disk-like Self-Assembled Morphologies from Cholesterol-Functionalized Amphiphilic Polycarbonate Diblock Copolymers, Macromolecules, 46(12), 4839 (2013).

41. R.E. Cavicchi, D.C. Meier, C. Presser, V.M. Prabhu, S. Guha, Single Laser Pulse Effects on Suspended-Au-Nanoparticle Size Distributions and Morphology, J. Phys. Chem. C 117(20), 10866-10875 (2013).

40. N Shin, J Kang, LJ Richter, VM Prabhu, RJ Kline, DA Fischer, DM DeLongchamp, MF Toney, SK Satija, DJ Gundlach, B Purushothaman, JE Anthony, DY Yoon "Vertically Segregated Structure and Properties of Small Molecule–Polymer Blend Semiconductors for Organic Thin-Film Transistors" Advanced Functional Materials 23 (3) 366-376 (2013).

39.VM Prabhu, S Kang, J Sha, PV Bonnesen, SK Satija, WL Wu, CK Ober,"Neutron Reflectivity Characterization of the Photoacid Reaction-Diffusion Latent and Developed Images of Molecular Resists for Extreme Ultraviolet Lithography," Langmuir,28,7665(2012).

38.VM Prabhu and V Reipa,"In situ Electrochemical Small-Angle Neutron Scattering (eSANS) for Quantitative Structure and Redox Properties of Nanoparticles," J. Phys. Chem. Lett., 3, 646(2012).

37.VM Prabhu, S Kang, RJ Kline, DM DeLongchamp, DA Fischer, WL Wu, SK Satija, PV Bonnesen, J Sha, CK Ober,"Characterization of the Non-uniform Reaction in Chemically Amplified Calix[4]resorcinarene Molecular Resist Thin Films," Aus. J. of Chem., 64, 1065(2011).

36. YS Chung, N Shin, J Kang, Y Jo, VM Prabhu, SK Satija, RJ Kline, DM DeLongchamp, MF Toney, MA Loth, B Purushothaman, JE Anthony, DY Yoon, "Zone-refinement effect in small molecule-polymer blend semiconductors for organic thin-film transistors," J. Amer. Chem. Soc., 133, 414 (2011).

35. KA Lavery, VM Prabhu, S Satija, WL Wu, "Lateral uniformity in chemical composition along a buried reaction front in polymers using off-specular reflectivity," J. of Physics-Condensed Matter, 22, 474001 (2010).

34. VM Prabhu, S Kang, DL VanderHart, SK Satija, EK Lin, WL Wu, "Photoresist latent and developer mages as probed by neutron reflectivity methods," Advanced Materials, 23, 388(2011).

33. RJ Murphy, D Pristinski, K Migler, JF Douglas, VM Prabhu, "Dynamic light scattering investigations of nanoparticle aggregation following a light-induced pH jump," Journal of Chemical Physics, 132, 194903(2010).

32. S Kang, VM Prabhu, CL Soles, EK Lin, W-L Wu, "Characterization of the Photoacid Diffusion Length and Reaction Kinetics in EUV Photoresists with IR Spectroscopy," Macromolecules, 43(9), 4275-4286 (2010).

31. J Sha, J-K Lee, S Kang, VM Prabhu, CL Soles, PV Bonnesen and CK Ober, "Architectural effects on acid reaction-diffusion kinetics in molecular glass photoresists," Chemistry of Materials, 22 (10), 3093–3098(2010).

30. VM Prabhu and SD Hudson, "Nanoparticle Assembly: DNA Provides Control," News and Views, Nature Materials, 8, 265(2009).

29. DL VanderHart, VM Prabhu, A De Silva, NM Felix, and CK Ober, "Solid state NMR investigations of photoresist molecular glasses including blend behavior with a photoacid generator," Journal of Materials Chemistry, 19, 2683(2009).

28. VM Prabhu, A Rao, S Kang, EK Lin, SK Satija, Manipulation of the asymmetric swelling fronts of photoresist polyelectrolyte gradient thin films, Journal of Physical Chemistry B, 112, 15628(2008).

27. DL VanderHart, VM Prabhu, K Lavery, C Dennis, A Rao, and EK Lin, "Thin film solid-state NMR measurements using a synthetic mica substrate: polymer blends," Journal of Magnetic Resonance, 201(1), 100-110(2009).

26. WE Wallace, KM Flynn, CM Guttman, DL VanderHart, VM Prabhu, A De Silva, NM Felix, CK Ober, "Quantitative Measurement of the Polydispersity in the Extent of Functionalization of Two Glass Forming Resorcinarenes, Rapid Communications in Mass Spectrometry," 23(13), 1957(2009).

25. S Kang, V M Prabhu, C L Soles, EK Lin, W-L Wu, "Methodology for quantitative measurement of multilayer polymer thin films with IR spectroscopic ellipsometry," Macromolecules, 42(14), 5296 (2009).

24. J Kang, N Shin, DY Jang, VM Prabhu, DY Yoon, "Structure and Properties of Small Molecule-Polymer Blend Semiconductors for Organic Thin Film Transistors," Journal of the American Chemical Society, 130, 12273-12275(2008).

23. K A Lavery, VM Prabhu, EK Lin, W-L Wu, SK Satija, K-W Choi, M Wormington, "Lateral length scales of latent image roughness as determined by off-specular neutron reflectivity," Applied Physics Letters, 92(1), 064106(2008).

22. VM Prabhu, BD Vogt, S Kang, A Rao, EK Lin, SK Satija, "Direct measurement of the spatial extent of the in situ developed latent image by neutron reflectivity," Journal of Vacuum Science and Technology B, 25(6)2514-2520(2007).

21.S Kang, BD Vogt, W-L Wu, VM Prabhu, DL VanderHart, A Rao, EK Lin, and K Turnquest, "Characterization of compositional heterogeneity in chemically amplified photoresist polymer thin films with infrared spectroscopy," Macromolecules, 40,1497-1503(2007).

20. BD Vogt, S Kang, VM Prabhu, A Rao, EK Lin, W-L Wu, S K Satija, and K Turnquest, "Influence of base additives on the reaction diffusion front of model chemically amplified photoresists," Journal of Vacuum Science and Technology B, 25,175-182(2007).

19. VM Prabhu, S Sambasivan, D Fischer, LK Sundberg, and RD Allen, "Quantitative depth profiling of photoacid generators in photoresist materials by near-edge x-ray absorption fine structure spectroscopy," Applied Surface Science, 253(2), 1010-1014 (2006).

18. K Lavery, BD Vogt, VM Prabhu, K-W Choi, EK Lin, W-L Wu, S Satija, "Exposure dose effects on the reaction-diffusion process in model EUV photoresists," Journal of Vacuum Science and Technology B, 24, 3044-3048 (2006).

17. BD Vogt, S Kang, VM Prabhu, EK Lin, SK Satija, K Turnquest, and W-L Wu, "Measurements of the reaction-diffusion front of model chemically amplified photoresists with varying photoacid size," Macromolecules, 39, 8311-8317(2006).

16. A Rao, S Kang, BD Vogt, VM Prabhu, EK Lin, W-L Wu, and M Muthukumar, "Effect of Deprotection Extent on Swelling and Dissolution Regimes of Thin Polymer Films," Langmuir, 22, 10009-10015(2006).

15. S Kang, V M Prabhu, B D Vogt, EK Lin, W-L Wu, K Turnquest, "Copolymer fraction effect on acid catalyzed deprotection reaction kinetics in model 193 nm photoresists," Polymer, 47(18),6293-6302(2006).

14. BD Vogt, VM Prabhu, CL Soles, SK Satija, EK Lin, W-L Wu, "Control of moisture at buried polymer/alumina interfaces through substrate surface modification," Langmuir, 21(6), 2460-2464 (2005).

13. BD Vogt, HJ Lee, VM Prabhu, DM DeLongchamp, EK Lin, W-L Wu, SK Satija, "X-ray and neutron reflectivity measurements of moisture transport through model multilayered barrier films for flexible displays," Journal of Applied Physics, 97(11) 114509(2005).

12. BD Vogt, CL Soles, CY Wang, VM Prabhu, PM McGuiggan, JF Douglas, EK Lin, W-L Wu, SK Satija, DL Goldfarb, M Angelopoulos, "Water immersion of model photoresists: interfacial influences on water concentration and surface morphology," Journal of Microlithography Microfabrication and Microsystems, 4 (1) 013003(2005).

11. VM Prabhu, "Counterion structure and dynamics in polyelectrolyte solutions," Current Opinion in Colloid Interface Science, 10, 2-8 (2005)

10. VM Prabhu, BD Vogt, W-L Wu, JF Douglas, EK Lin, SK Satija, DL Goldfarb, H Ito, "Direct measurement of the counterion distribution within swollen polyelectrolyte films," Langmuir, 21(15), 6647-6651(2005).

9. N Noda, Y-H Lee, AJ Bur, VM Prabhu, CR Snyder, SC Roth, M McBrearty, "Dielectric properties of nylon 6/clay nanocomposites from on-line process monitoring and off-line measurements," Polymer, 46 (18), 7201-7217(2005).

8. VM Prabhu, D Bossev, N Rosov, and EJ Amis, "Counterion associative behavior with flexible polyelectrolytes," Journal of Chemical Physics, 121(9) 4424 (2004).

7. DL VanderHart, VM Prabhu, EK Lin, "Proton NMR determination of miscibility in a bulk model photoresist system: Poly(4-hydroxystyrene) and the photoacid generator, di(t-butylphenyl) iodonium perfluorooctane sulfonate," Chemistry of Materials, 16 (16), 3074-3084 (2004).

6. RL Jones, VM Prabhu, DL Goldfarb, EK Lin, CL Soles, JL Lenhart, W-L Wu, and M Angelopoulos, "Correlation of the reaction front with roughness in chemically amplified photoresists," ACS Symposium Series, Polymers for Microelectronics and Nanoelectronics, Oxford University Press, Washington DC, 874, 86-97(2004).

5. VM Prabhu, EK Lin, "Advanced Measurements for Photoresist Fundamentals," Semiconductor Fabtech International Quarterly, 24, 99-103 (2004).

4. EL Jablonski, VM Prabhu, S Sambasivan, EK Lin, DA Fischer, DL Goldfarb, M Angelopoulos, H Ito, "Near edge x-ray absorption fine structure measurements of surface segregation in 157 nm photoresist blends," Journal of Vacuum Science and Technology B, 21(6) 3162-3165(2003)

3. VM Prabhu, RL Jones, EK Lin, W-L Wu, "Polyelectrolyte Effects in Model Photoresist Developer Solutions," Journal of Vacuum Science and Technology B, 21, 1403-1410, (2003).

2. VM Prabhu, M Muthukumar, GD Wignall, YB Melnichenko, "Polyelectrolyte Chain Dimensions and Concentration Fluctuations near Phase Boundaries," Journal of Chemical Physics, 119,4085-4098 (2003).

1. VM Prabhu, M Muthukumar, GD Wignall, YB Melnichenko, "Dimensions of polyelectrolyte chains and concentration fluctuations in semi dilute solutions of sodium-poly(styrene sulfonate) as measured by small-angle neutron scattering," Polymer, 42, 8935-8946 (2001).


Created October 9, 2019, Updated June 30, 2022