SITARAMAN KRISHNAN

Associate Professor

Department of Chemical and Biomolecular Engineering

229 Center for Advanced Materials Processing

Clarkson University

Potsdam, NY 13699-5705

Phone: 315-268-6661

Fax: 315-268-6654

skrishna@clarkson.edu

 
Curriculum vitae
Education 
Research Interests
Teaching
Peer Reviewed Publications
Patents
Book Chapters
Conference Presentations and Proceedings
Poster Presentations
Current and Past Lab Members
Memberships and Affiliations
Photo Gallery
EDUCATION

RESEARCH INTERESTS

Our research focuses on materials synthesis and characterization. The lab specializes in molecular-scale engineering of surfaces and thin films using polymers. The macromolecular design strategies used in the group are based on the fundamentals of chemical thermodynamics and transport processes, and are currently targeted toward applications in protective and antifouling coatings, organic solar cells, high temperature proton exchange membrane fuel cells, and lithium ion batteries. Stimulus responsive polymer particles for sustained oral delivery of bioactives are also being developed.

The group’s primary interest is in the use of microstructured and composite materials, and in tailoring the rheological and transport properties of these materials to suit an application of interest. The group uses contemporary methods of organic synthesis to make polymers, synchrotron-based X-ray absorption and scattering techniques to probe molecular self-assembly in thin films, and computer simulations to correlate experimental results with theory. Advanced electrochemical characterization of materials is performed with the help of Dr. Dipankar Roy (Physics), and molecular simulations are conducted in collaboration with Dr. John McLaughlin (Chemical and Biomolecular Engineering). Conventional techniques of polymer, colloid and surface chemistry, such as thermal analysis and calorimetry, contact angle measurements, light scattering, and electrophoretic measurements are routinely used.

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TEACHING

  1. CH571 Advanced Chemical Engineering Thermodynamics (Spring 2011 and Spring 2013)

  2. CH445 Chemical Reactor Analysis I (Fall 2009 and Fall 2010)

  3. CH410 Chemical Engineering Laboratory (Fall 2007, co-taught with Professor Richard McCluskey)

  4. CH351 Mass Transfer (Fall 2007, co-taught with Professor Ross Taylor)

  5. CH320 Applied Phase and Chemical Equilibria (Fall 2011 and Fall 2012)

  6. CH272 Applied Phase and Chemical Equilibria (Spring 2009)

  7. ES452 Biomaterials and Biomedical Engineering Applications (Spring 2008; Spring 2010, and Spring 2012); ES552 Biomaterials and Biomedical Engineering Applications (Spring 2008)

  8. ES442 Introduction to Research and Graduate Study (Fall 2009, Fall 2011, and Fall 2012; co-taught with Professor Kathleen Issen)

  9. ES365 Polymer Materials (Fall 2008); CH515 Polymer Materials (Fall 2008)

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PEER REVIEWED PUBLICATIONS

  1. A. Sreeram, N. G. Patel, R. I. Venkatanarayanan, J. B. McLaughlin, S. J. DeLuca, P. Yuya, and S. Krishnan, “Nanomechanical Properties of Conjugated Polymer Thin Films,” Submitted.

  2. S. S. Moganty, P. S. Chinthamanipeta, V. K. Vendra, S. Krishnan, and R. Baltus, “Structure-Property Relationships in Transport and Thermodynamic Properties of Imidazolium Bistriflamide Ionic Liquids for CO2 Capture,” Submitted.

  3. J. M. Myrick, V. K. Vendra, and S. Krishnan, “Self-assembled Polysaccharide Based Nanostructures for Controlled Release Applications,” Nanotechnol. Rev., DOI: 10.1515/ntrev-2012-0050. PDF

  4. U. R. K. Lagudu, S. Isono, S. Krishnan, and S. V. Babu, “Role of Ionic Strength in Chemical Mechanical Polishing of Silicon Carbide Using Silica Slurries,” Colloids Surf. A: Physicochem. Eng. Aspects, 445, 119-127, (2014). Link

  5. J. B. Matovu, P. Ong, L. H. A. Leunissen, S. Krishnan, and S. V. Babu, “Fundamental Investigation of Chemical Mechanical Polishing of GaAs in Silica Dispersions: Material Removal and Arsenic Trihydride Formation Pathways,” ECS J. Solid State Sci. Technol., 2, P432-P439, (2013). Link

  6. J. B. Matovu, P. Ong, L. H. A. Leunissen, S. Krishnan, and S. V. Babu, “Use of Multifunctional Carboxylic Acids and Hydrogen Peroxide To Improve Surface Quality and Minimize Phosphine Evolution During Chemical Mechanical Polishing of Indium Phosphide Surfaces,” Ind. Eng. Chem. Res., 52, 10664-10672, (2013). Link

  7. S. Rock, W. Lin, D. Crain, S. Krishnan, and D. Roy, “Interfacial Characteristics of a PEGylated Imidazolium Bistriflamide Ionic Liquid Electrolyte at a Lithium Ion Battery Cathode of LiMn2O4,” ACS Appl. Mater. Interfaces, 5, 2075-2084, (2013). Link

  8. J. L. Lebga-Nebane, S. Rock, J. Franclemont, D. Roy, and S. Krishnan, “Thermophysical Properties and Proton Transport Mechanisms of Protic Ionic Liquids,” Ind. Eng. Chem. Res., 51, 14084-14098, (2012). Link

  9. O. Z. Durham, S. Krishnan, and D. A. Shipp, “Polymer Microspheres Prepared by Water-borne Thiol-ene Suspension Photopolymerization,” ACS Macro Lett., 1, 1134-1137, (2012). Link

  10. L. Wu, J. Jasinski, and S. Krishnan, “Carboxybetaine, Sulfobetaine, and Cationic Block Copolymer Coatings: A Comparison of the Surface Properties and Antifouling Behavior,” J. Appl. Polym. Sci., 124, 2154-2170, (2012). Link

  11. L. V. N. R. Ganapatibhotla, L. Wu, J. Zheng, X. Jia, D. Roy, J. B. McLaughlin, and S. Krishnan, “Ionic Liquids with Fluorinated Block-oligomer Tails: Impact of Self-assembly on Transport Properties,” J. Mater. Chem., 21, 19275-19285, (2011). Link

  12. N. K. Penta, J. B. Matovu, P. R. Dandu, S. Krishnan, and S. V. Babu, “Role of Polycation adsorption in Poly-Si, SiO2 and Si3N4 Removal During Chemical Mechanical Polishing: Effect of Polishing Pad Surface Chemistry,” Colloids Surf. A: Physicochem. Eng. Aspects, 388, 21-28, (2011). Link

  13. E. Martinelli, G. Galli, S. Krishnan, M. Y. Paik, C. K. Ober, and D. A. Fischer, “New Poly(dimethylsiloxane)/poly(perfluorooctylethyl acrylate) Block Copolymers: Structure and Order Across Multiple Length Scales in Thin Films,” J. Mater. Chem., 21, 15357-15368, (2011). Link

  14. L. V. N. R. Ganapatibhotla, J. Zheng, D. Roy, and S. Krishnan, “PEGylated Imidazolium Iodide Ionic Liquid Electrolytes: Thermophysical and Electrochemical Properties,” Chem. Mater., 22, 6347-6360, (2010). Link

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  15. S. Krishnan, M. Y. Paik, C. K. Ober, E. Martinelli, G. Galli, K. E. Sohn, E. J. Kramer, and D. A. Fischer, “NEXAFS Depth Profiling of Surface Segregation in Block Copolymer Thin Films,” Macromolecules, 43, 4733-4743, (2010). Link

  16. C. J. Weinman, N. Gunari , S. Krishnan, R. Dong, M. Y. Paik, K. E. Sohn, G. C. Walker, E. J. Kramer, D. A. Fischer, C. K. Ober, “Protein Adsorption Resistance of Anti-Biofouling Block Copolymers Containing Amphiphilic Side Chains,” Soft Matter, 6, 3237-3243, (2010). Link

  17. D. Park, J. A. Finlay, R. J. Ward, C. J. Weinman, S. Krishnan, M. Y. Paik, K. E. Sohn, M. E. Callow, J. A. Callow, D. L. Handlin, C. L. Willis, D. A. Fischer, E. R. Angert, E. J. Kramer, C. K. Ober, “Antimicrobial Behavior of Semifluorinated-Quaternized Triblock Copolymers Against Marine and Airborne Microorganisms,” ACS Appl. Mater. Interfaces, 2, 703-711, (2010). Link

  18. C. J. Weinman, J. A. Finlay, D. Park, M. Y. Paik, S. Krishnan, H. S. Sundaram, M. Dimitriou, K. E. Sohn, M. E. Callow, J. A. Callow, D. L. Handlin, C. L .Willis, E. J. Kramer, C. K. Ober, “ABC Triblock Surface Active Block Copolymers with Grafted Ethoxylated Fluoroalkyl Amphiphilic Side Chains for Marine Anti-Fouling/Fouling-Release Applications,” Langmuir, 25, 12266-12274, (2009). Link    

  19. E. Martinelli, S. Menghetti , G. Galli, A. Glisenti, S. Krishnan, M. Y. Paik, C. K. Ober, D.-M. Smilgies, D. A. Fischer, “Surface Engineering of Styrene/PEGylated-fluoroalkyl Styrene Block Copolymer Thin Films,” J. Polym. Sci. Part A: Polym. Chem. 47, 267-284 (2009). Link

  20. S. Krishnan, C. J. Weinman, C. K. Ober, “Advances in Polymers for Anti-Biofouling Surfaces,” J. Mater. Chem., 18, 3405-3413, (2008). Link

  21. J. A. Finlay, S. Krishnan,* M. E. Callow, J. A. Callow, R. Dong, N. Asgill, K. Wong, E. J. Kramer, C. K. Ober, “Settlement of Ulva Zoospores on Patterned Fluorinated and PEGylated Monolayer Surfaces,” Langmuir, 24, 503-510, (2008). Link

  22. R. Dong, S. Krishnan, B. A. Baird, M. Lindau, C. K. Ober, “Patterned Biofunctional Poly(acrylic acid) Brushes on Silicon Surfaces,” Biomacromolecules, 8, 3082-3092, (2007). Link

  23. M. Y. Paik, S. Krishnan, F. You, X. Li, A. Hexemer, Y. Ando, S. H. Kang, D. A. Fischer, E. J. Kramer, C. K. Ober, “Surface Organization, Light Driven Surface Changes and Stability of Semifluorinated Azobenzene Polymers”, Langmuir, 23, 5110-5119, (2007). Link

  24. P. Busch, S. Krishnan, M. Paik, G. E. S. Toombes, D.-M. Smilgies, S. M. Gruner, C. K. Ober, “Surface Induced Tilt Propagation in Thin Films of Semifluorinated Liquid Crystalline Side Chain Block Copolymers”, Macromolecules, 40, 81-89, (2007). Link

  25. S. Krishnan, R. J. Ward, A. Hexemer, K. E. Sohn, K. L. Lee, E. R. Angert, D. A. Fischer, E. J. Kramer, C. K. Ober, “Surfaces of Fluorinated Pyridinium Block-Copolymers with Enhanced Antibacterial Activity,” Langmuir, 22, 11255-11266, (2006). Link

  26. S. Krishnan, A. Ramakrishnan, A. Hexemer, J. A. Finlay, K. E. Sohn, R. Perry, C. K. Ober, E. J. Kramer, M. E. Callow, J. A. Callow, D. A. Fischer, “Anti-Biofouling Properties of Comblike Block Copolymers with Amphiphilic Side Chains,” Langmuir, 22, 5075-5086, (2006). Link

  27. S. Krishnan, N. Wang, C. K. Ober, J. A. Finlay, M .E. Callow, J. A. Callow, A. Hexemer, K. E. Sohn, E. J. Kramer, D. A. Fischer, “Comparison of the Fouling Release Properties of Hydrophobic Fluorinated and Hydrophilic PEGylated Block Copolymer Surfaces: Attachment Strength of the Diatom Navicula and the Green Alga Ulva,” Biomacromolecules, 7, 1449-1462, (2006). Link

  28. L. R. Pattison, A. Hexemer, E. J. Kramer, S. Krishnan, P. M. Petroff, D. A. Fischer, “Probing the Ordering of Semiconducting Fluorene-Thiophene Copolymer Surfaces on Rubbed Polyimide Substrates by Near-Edge X-ray Absorption Fine Structure,” Macromolecules, 39, 2225-2231, (2006). Link

  29. S. Krishnan, A. Klein, M. S. El-Aasser, E. D. Sudol, “Ultracentrifugation Method to Measure Water-Soluble Monomer Incorporation in Latex,” Colloid Polym. Sci., 283, 836-844, (2005). Link

  30. S. Krishnan, Y.-J. Kwark, C. K. Ober, “Fluorinated Polymers: Liquid Crystalline Properties and Applications in Lithography,” Chemical Record, 4, 315-330, (2004). Link

  31. S. Krishnan, A. Klein, M. S. El-Aasser, E. D. Sudol, “Effects of Agitation on Oxygen Inhibition, Particle Nucleation, Reaction Rates, and Molecular Weights in Emulsion Polymerization of n-Butyl Methacrylate,” Ind. Eng. Chem. Res., 43, 6331-6342, (2004). Link

  32. S. Krishnan, A. Klein, M. S. El-Aasser, E. D. Sudol, “Influence of Chain Transfer Agent on the Cross-Linking of Poly(n-butyl methacrylate-co-N-methylol acrylamide) Latex Particles and Films,” Macromolecules, 36, 3511-3518, (2003). Link

  33. S. Krishnan, A. Klein, M. S. El-Aasser, E. D. Sudol, “Effect of Surfactant Concentration on Particle Nucleation in Emulsion Polymerization of n-Butyl Methacrylate,” Macromolecules, 36, 3152-3159, (2003). Link

  34. S. Krishnan, A. Klein, M. S. El-Aasser, E. D. Sudol, “Relative Importance of the Effects of Seed and Feed Stage Agitations on Latex Properties in Semibatch Emulsion Copolymerization of n-Butyl Methacrylate and N-Methylol Acrylamide,” Polym. React. Eng., 11, 359-378, (2003). Link

  35. S. Krishnan, A. Klein, M. S. El-Aasser, E. D. Sudol, “Agitation Effects in Emulsion Copolymerization of n-Butyl Methacrylate and N-Methylol Acrylamide. Krishnan,” Polym. React. Eng., 11, 335-357, (2003). Link

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MANUSCRIPTS IN PREPARATION

  1. L. Wu and S. Krishnan, “Surface Charge of Zwitterionic Polymers.”

  2. V. K. Vendra, J. M. Myrick, W. Leith, F. A. Sexton, and S. Krishnan, “pH-Responsive Self-assembled Polysaccharide Microparticles for Sustained Oral Delivery of Hydrophilic Bioactives.”

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PATENTS

Granted Patents

  1. C. K. Ober, S. Krishnan, and Q. Lin, “Polymers and Polymer Coatings,” U.S. Patent 8,192,843 B2, Jun 5, 2012.

  2. C. K. Ober, S. Krishnan, and Q. Lin, “Polymers and Polymer Coatings,” U.S. Patent 7,887,790 B2, Feb 15, 2011.

  3. C. K. Ober, S. Krishnan, Q. Lin, and E. J. Kramer, “Polymers Containing Quaternized Nitrogen,” U.S. Patent 7,763,687 B2, Jul 27, 2010.

  4. C. K. Ober, S. Krishnan, and Q. Lin, “Polymers with Ether Containing Side Chains and Compositions Thereof,” U.S. Patent 7,709,055 B2, May 4, 2010.

Patent Applications

  1. F. A. Sexton, S. Krishnan, and V. K. Vendra, “Sustained Release of Nutrients In Vivo”, U.S. Pat. Appl. Publ., US 2012/0015039 A1, Jan 19, 2012.

  2. F. A. Sexton, S. Krishnan, and V. K. Vendra, “Sustained Release of Nutrients In Vivo”, U.S. Pat. Appl. Publ., US 2009/0155409 A1, Jun 18, 2009.

  3. S. DeLuca and S. Krishnan, “Electrically Conducting Polymer Thin Films and Methods of Making the Same,” U.S. Pat. Appl., 13/444,354 (2012).

  4. S. Krishnan, L. Ganapatibhotla, D. Roy, and J. Zheng, “Solid Organic Electrolytes,” U.S. Pat. Appl., 12/778,410 (2010).

Provisional Patent Application

  1. D. A. Shipp, O. Z. Durham, and S. Krishnan, “Water-Borne Thiol-Ene Polymerization,” Provisional Patent Application, 61/636,046 (2012).

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    BOOK CHAPTERS

  1. S. Krishnan, “Marine Bioadhesion on Polymer Surfaces and Strategies for its Prevention,” in Polymer Adhesion, Friction, and Lubcrication; Zeng, H., Ed.; John Wiley & Sons: Hoboken, NJ; Chapter 6 (2013).

  2. V. K. Vendra, L. Wu, S. Krishnan, “Polymer Thin Films for Biomedical Applications,” in Nanostructured Thin Films and Surfaces; Kumar, C. S. S. R., Ed.; Nanomaterials for the Life Sciences; Vol. 5; Wiley: Weinheim; Chapter 1, pp. 1–51 (2010). http://www.wiley-vch.de/books/sample/3527321551_c01.pdf.

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CONFERENCE PRESENTATIONS AND PROCEEDINGS

  1. L. Wu, R. I. Venkatanarayanan, J. L. Lebga-Nebane, X. Shi, J. B. McLaughlin, D. Roay, and S. Krishnan,* “Ionic Liquid Electrolytes for Lithium Ion Batteries: Effect of Lithium Salts on Thermal and Transport Properties,” AIChE 2013 Annual Meeting, San Francisco, California (November 2013). Link

  2. M. Luo, M. Sankarasubramanian, S. Krishnan,* and J. B. McLaughlin, “Structure-Property Relationships for PDMS-Silica Nanocomposites,” AIChE 2013 Annual Meeting, San Francisco, California (November 2013). Link

  3. S. Krishnan,* “Some Experimental Studies on Tailoring Material Properties in Self-Assembling Soft Matter Systems,” National Chemical Laboratory, Pune, India (July 25, 2013). Invited talk. Link

  4. S. Krishnan,* “Surface Analysis of Nanostructured Polymer Thin Films Using Near-Edge X-ray Absorption Fine Structure Spectroscopy,” 2013 European Polymer Federation Congress, Pisa, Italy (June 16-21, 2013). Invited talk. Link

  5. S. Krishnan,* “Electrolytes for Lithium Ion Batteries,” (in the session titled Cutting Edge Research in Energy Storage), NY-BEST Energy Storage Technology Conference, New York Battery & Energy Storage Technology, Fairport, New York (November 2012). Invited talk.

  6. S. Krishnan,* J. L. Lebga, L. Wu, J. B. McLaughlin, S. Rock, and D. Roy, “Thermophysical and Electrochemical Properties of Self-Assembling Amphiphilic Ionic Liquids,” AIChE 2012 Annual Meeting, Pittsburgh, Pennsylvania (October 2012). Link

  7. J. M. Myrick,* S. Krishnan, and F. A. Sexton, “Controlled Release from Self-Assembled Polymer Microparticles that are Responsive to pH and Temperature,” AIChE 2012 Annual Meeting, Pittsburgh, Pennsylvania (October 2012). Link

  8. Z. Durham,* S. Krishnan, and D. A. Shipp, “Polymer Microspheres Prepared by Water-borne thiol-ene Suspension Photopolymerization,” IUPAC World Polymer Congress, MACRO2012, Blacksburg, Virginia (2012). Link

  9. S. Krishnan and L. Wu, “A Comparison of Protein-Repellent Properties of Zwitterionic and Cationic Fluorinated Block Copolymer Surfaces,” AIChE 2011 Annual Meeting, Minneapolis, Minnesota (2011). Link

  10. J. B. McLaughlin, S. Krishnan, L. Wu, L. V. N. R. Ganapatibhotla, X. Jia, D. Roy, and J. Zheng, “Self-Consistent Field Modeling of Microstructure Formation in Fluorinated "Block" Ionic Liquids for Photovoltaic Cells,” AIChE 2011 Annual Meeting, Minneapolis, Minnesota (2011). Link

  11. J. L. Lebga, S. Krishnan, J. Zheng, and D. Roy, “Structure-Property Relationships in Protic Ionic Liquids for High-Temperature PEM Fuel Cells,” AIChE 2011 Annual Meeting, Minneapolis, Minnesota (2011). Link

  12. S. Krishnan, “Amphiphilic Copolymers: Self-Assembly at Surfaces, in Thin Films, and in Solutions,” Clarkson University, Department of Chemical & Biomolecular Engineering Seminar, Potsdam, New York (March 8, 2011).

  13. S. Krishnan, L. V. N. R. Ganapatibhotla, J. Zheng, and D. Roy, “Solid Organic Electrolytes and Ionic Liquids, with Poly(ethylene glycol) and Semifluorinated Alkyl Side Chains, for Photovoltaic and Energy Storage Applications,” AIChE 2010 Annual Meeting, Salt Lake City, Utah (2010). Link

  14. P. Kelleher and S. Krishnan, “Optical Properties of Iodine-doped Partially Dehydrated Poly(vinyl alcohol) Thin Films,” 12th Annual Summer Symposium on Undergraduate Research Experiences, Clarkson University, Potsdam, New York (2010).

  15. S. Laramie and S. Krishnan, “Finding Structure-property Correlations for Ionic Liquids Using Molecular Connectivity Indices,” 12th Annual Summer Symposium on Undergraduate Research Experiences, Clarkson University, Potsdam, New York (2010).

  16. T. Glave, J. B. McLaughlin, and S. Krishnan, “Novel Nanocomposite Materials for Solar Cell Fabrication”, Talk presented at the 2010 University at Buffalo McNair Research Conference in Buffalo, NY, July 16, 2010.

  17. L. Wu and S. Krishnan, “Surface Wettability and Anti-biofouling Properties of Ionic Block Copolymer Coatings,” 37th Northeast Regional Meeting of the American Chemical Society, Potsdam, New York (2010).

  18. L. V. Ganapatibhotla, S. Krishnan, D. Roy, and J. Zheng, “PEGylated and Fluorinated Ionic Salts for Dye-Sensitized Solar Cells,” 37th Northeast Regional Meeting of the American Chemical Society, Potsdam, New York (2010).

  19. V. K. Vendra, F. A. Sexton, and S. Krishnan, “Self-assembled Polymer Microparticles for Sustained Oral Delivery of Hydrophilic Bioactives,” 37th Northeast Regional Meeting of the American Chemical Society, Potsdam, New York (2010).

  20. L. Ganapatibhotla, J. P. Zheng, D. Roy, and S. Krishnan, “PEGylated and Fluorinated Organic Salts for Dye-sensitized Solar Cells and Supercapacitors,” CAMP Technical Meeting, Canandaigua, New York, May19-21, 2010.

  21. S. Krishnan, “Pollution Prevention Using Non-leaching, Non-Toxic Polymers as Anti-Biofouling Surface Coatings.” Presented at the Green Engineering Workshop organized by NYS Pollution Prevention Institute, Potsdam, New York, October 27, 2009.

  22. S. Laramie, L. Ganapatibhotla, and S. Krishnan, “Comparing the current and voltage characteristics of a dye-sensitized solar cell to a crystalline silicon solar cell,” 11th Annual Summer Symposium on Undergraduate Research Experiences, Clarkson University, Potsdam, New York (2009).

  23. S. Krishnan, “Fluorinated Block Copolymers as Marine Antifouling Coatings and Conducting Polymer Electrolytes,” CAMP Fall 2009 Symposium, Potsdam, New York, October 15, 2009.

  24. S. S. Moganty, P. Kumar, V. K. Vendra, S. Krishnan, and R. E. Baltus, “Novel Ionic Liquids for CO2 Capture,” AIChE 2009 Annual Meeting, Nashville, Tennessee (2009).

  25. L. Wu, V. K. Vendra, L. Ganapatibhotla, and S. Krishnan “Functional fluorinated polymers as biomaterial coatings and conducting polymer electrolytes”, Poster presented at the Center for Advanced Materials Processing Fall 2009 Symposium, Potsdam, NY, October 15, 2009.

  26. S. S. Moganty, J. Close, P. Goonetilleke, S. Krishnan, R. Baltus, and D. Roy, “Electrochemical Supercapacitors Based on Polymerizabale Ionic Liquids,” AIChE 2008 Annual Meeting, Philadelphia, Pennsylvania (2008). The poster won the first prize among 161 posters presented at a technical session of the Materials Engineering and Science Division of the AIChE.

  27. C. J. Smith, L. Wu, and S. Krishnan, “Photocrosslinkable Triblock Copolymer Hydrogels for Protein Encapsulation,” 10th Annual Summer Symposium on Undergraduate Research Experiences, Clarkson University, Potsdam, New York (2008).

  28. S. Krishnan, J. A. Finlay, D. Park, C. J. Weinman, R. Dong, K. Wong, N. Asgill, M. E. Callow, J. A. Callow, D. L. Handlin, C. L. Willis, L. Brewer, D. E. Wendt, K. E. Sohn, E. J. Kramer, and C. K. Ober, “Ambiguous Polymer Surfaces for Marine Antifouling Applications,“ Polym. Mater. Sci. Eng. Preprints, 98, 83-84, (2008).

  29. C. J. Weinman, J. A. Finlay, D. Park, M. Y. Paik, S. Krishnan, B. R. Fletcher, M. E. Callow, J. A. Callow, D. L. Handlin, C. L. Willis, D. A. Fischer, K. E. Sohn, E. J. Kramer, and C. K. Ober, “Antifouling ABC Triblock Copolymers with Grafted Functionality,” Polym. Mater. Sci. Eng. Preprints, 98, 639-641, (2008).

  30. S. Krishnan, M. Y. Paik, K. E. Sohn, C. K. Ober, E. J. Kramer, and D. A. Fischer, “Investigating Surface Segregation and Self Organization of Amphiphilic Polyelectrolytes Using NEXAFS Spectroscopy,” AIChE 2007 Annual Meeting, Salt Lake City, Utah (2007).

  31. K. E. Sohn, S. Krishnan, M. Y. Paik, C. K. Ober, E. J. Kramer, and D. A. Fischer, “Depth Profiling Using NEXAFS Spectroscopy,” American Physical Society March Meeting, Denver, Colorado, (2007).

  32. C. K. Ober, R. Dong, S. Krishnan, Y. Yi, B. Baird, M. Lindau, and E. J. Kramer, “Building and Patterning the Biology-Materials Interface,” European Polymer Congress 2007, European Polymer Federation, Portorož, Slovenia (2007).

  33. P. Busch, S. Krishnan, M. Paik, G. Toombes, S. Gruner, and C. Ober, “Thin Films of Semifluorinated Liquid Crystalline Side Chain Block Copolymers,” Annual Meeting of the Deutsche Physikalische Gesellschaft and DPG Spring meeting of the Division Condensed Matter, Regensburg, Germany (2007).

  34. C. J. Weinman, S. Krishnan, D. Park, M. Y. Paik, K. Wong, D. A. Fischer, D. L. Handlin Jr., G. L. Kowalke, D. E. Wendt, K. E. Sohn, E. J. Kramer, and C. K. Ober, “Antifouling Block Copolymer Surfaces that Resist Settlement of Barnacle Larvae,” 223rd ACS National Meeting, Chicago, IL, Polym. Mater Sci. Eng. Preprints, 96, 597-598, (2007).

  35. S. Krishnan, C. J. Weinman, C. K. Ober, J. A. Finlay, M. E. Callow, J. A. Callow, K. E. Sohn, and E. J. Kramer, “Environmentally Responsive Block Copolymers as Marine Antifouling Surfaces,” The 2nd Joint ONR/AMBIO Workshop on Marine Adhesion and Antifouling, Jacksonville, FL, (2006).

  36. K. E. Sohn, A. Hexemer, S. Krishnan, M. Y. Paik, C. K. Ober, E. J. Kramer, and D. A. Fischer, “Effect of Annealing Temperature on the Surface Composition of Block Copolymers with Semifluorinated Side Chains,” American Physical Society March Meeting, Baltimore, MD, (2006).

  37. C. Weinman, S. Krishnan, D. W. Park, Q. Lin, E. J. Kramer, D. Handlin, C. Willis, and C. K. Ober, “Multilayer Polymer Coatings with Controlled Surface Properties for Marine Antifouling Applications”, Polymer Outreach Program Symposium, Cornell Center for Materials Research, Ithaca, NY, (2006).

  38. C. K. Ober, S. Krishnan, R. Ayothi, and M. Y. Paik, “Fluoropolymer Surfaces for the Biology Materials Interface,” in Proceedings of the 4th Biennial Conference on the Science, Technology, and Impact of Fluorine Containing Polymeric Materials: Fluoropolymer 2006, American Chemical Society, Charleston, SC, (2006).

  39. C. K. Ober, W. Senaratne, S. Krishnan, C. Weinman, P. Sengupta, and B. Baird, “The Use of Polymer Nanostructure to Control Biological-Polymer Surface Interactions,” World Polymer Congress-Macro 2006, 41st International Symposium on Macromolecules.

  40. C. K. Ober, R. Dong, S. Krishnan, and B. Baird, “Patterned Biofunctional Polymer Brushes,” Polymer Outreach Program Symposium, Cornell University, Ithaca, NY (2006).

  41. S. Krishnan, M. Y. Paik, C. K. Ober, A. Hexemer, K. E. Sohn, E. J. Kramer, M. Häckel, L. Kador, D. Kropp, and H.-W. Schmidt, “Tailoring Surface Properties Using Functional Side Groups on Block Copolymers,” Polym. Mater. Sci. Eng. Preprints, 95, 105-106, (2006).

  42. S. Krishnan, C. K. Ober, A. Hexemer, E. J. Kramer, and D. A. Fischer, “Compositional Depth Profiling of Block Copolymer Surfaces Using NEXAFS,” Polym. Mater. Sci. Eng. Preprints, 94, 672-673, (2006).

  43. S. Krishnan, C. K. Ober, R. Ayothi, Q. Lin, M. Y. Paik, C. J. Weinman, A. Hexemer, E. J. Kramer, and D. A. Fischer, “Fluoropolymers at Biological and Marine Interfaces,” Materials Science & Engineering in 2020, Cornell University, Ithaca, NY (2005).

  44. S. Krishnan, J. A. Finlay, A. Hexemer, N. Wang, C. K. Ober, E. J. Kramer, M. E. Callow, J. A. Callow, and D. A. Fischer, “Interaction of Ulva and Navicula Marine Algae with Surfaces of Pyridinium Polymers with Fluorinated Side-chains,” Polymer Preprints 46, 1248-1249, (2005). This paper received an award for outstanding talk at the symposium “Polymers for Bioactive Surfaces” at the American Chemical Society National Meeting, Washington, DC, August 2005.

  45. S. Krishnan, C. K. Ober, R. Ayothi, Q. Lin, M. Paik, A. Hexemer, E. J. Kramer, and D. Fischer, “Hydrophobic and Hydrophilic Fluoropolymers as Non-Adhesive Interfaces in Marine Biofouling,” Polymer Preprints, 46, 613-614, (2005).

  46. Q. Lin, S. Krishnan, M. Paik, P. Busch, C. K. Ober, A. Hexemer, K. E. Sohn, E. J. Kramer, G. L. Kowalke, and D. E. Wendt, “Semifluorinated Triblock Copolymers as Surface Active Components for Multilayer Marine Antifouling Coatings,” Polymer Preprints, 46, 635-636, (2005).

  47. C. K. Ober, E. J. Kramer, S. Krishnan, and Q. Lin, “Multilayer Polymer Coatings for Marine Antifouling Applications,” Proceedings of the Coatings/Biofouling Program Review, Office of Naval Research, San Francisco (2004).

  48. C. K. Ober, S. Krishnan, J. P. Youngblood, A. Hexemer, E. J. Kramer, J. A. Finlay, and M. E. Callow, “Surface-Active Materials with Antifouling Properties,” Polymer Preprints, 45, 103-104, (2004).

    49.

  49. S. Krishnan, C. K. Ober, K. L. Lee, E. R. Angert, A. Hexemer, and E. J. Kramer, “Antibacterial Coatings Based on Quaternized Poly(4-Vinylpyridine) Block Copolymers,” Polym. Mater. Sci. Eng. Preprints, 91, 814-815, (2004).

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    POSTER PRESENTATIONS (* indicates presenting author)

  1. N. Patel,* A. Sreeram,* S. DeLuca, S. Krishnan, and P. Yuya, “Synthesis and Nano-Mechanical Properties Characterization of Conjugated Polymer Thin Films,” 2013 MRS Fall Meeting, Symposium GG: Surface/Interface Characterization and Renewable Energy, Boston, MA (December 2, 2013).

  2. J. M. Myrick,* F. A. Sexton, and S. Krishnan, “Controlled Release from Stimuli Responsive Polymer Particles,” The 2012 Annual Meeting of the Center for Advanced Materials Processing, Albany, New York (May 2012).

  3. L. Wu,* L. V. N. R. Ganapatibhotla, J. Zheng, D. Roy, and S. Krishnan, “Electrochemical Properties of Novel PEGylated Electrolyte Blends for DSSCs and Lithium Ion Batteries,” The 2011 Fall Meeting of the Center for Advanced Materials Processing, Clarkson University, Potsdam, New York (October 2011).

  4. L. Wu* and S. Krishnan, “Interfacial Properties and Colloidal Interactions of Zwitterionic and Cationic Block Copolymers,” The 16th International Symposium on Chemical-Mechanical Planarization, Lake Placid, New York (August 2011).

  5. J. L. Lebga,* S. Krishnan, J. Zheng, and D. Roy, “Structure-Property Relationships in Protic Ionic Liquids for High-Temperature PEM Fuel Cells,”  The 2011 Annual Meeting of the Center for Advanced Materials Processing, Albany, New York (May 2011). The poster won the second place in the “most creative” category.

  6. L. Wu,* L. V. N. R. Ganapatibhotla, J. Zheng, D. Roy, and S. Krishnan, “Solid-sate Organic Electrolytes for Dye-Sensitized Solar Cells,” The 2010 Fall Meeting of the Center for Advanced Materials Processing, Clarkson University, Potsdam, New York (October 2010).

  7. L. Ganapatibhotla, S. Krishnan, J. Zheng, and D. Roy, “PEGylated and Fluorinated Ionic Salts for Dye-Sensitized Solar Cells,” The 2010 Annual Meeting of the Center for Advanced Materials Processing, Canandaigua, New York (May 2010). Won the “best overall poster” prize.

  8. L. Wu* and S. Krishnan, “Surface Wettability and Anti-biofouling Properties of Ionic Block Copolymer Coatings,” The 2010 Annual Meeting of the Center for Advanced Materials Processing, Canandaigua, New York (May 2010).

  9. L. Wu,* L. V. N. R. Ganapatibhotla,* and S. Krishnan, “Functional Fluorinated Polymers as Anti-biofouling Coatings and Ion Conducting Polymer Elelctrolytes," The 2009 Annual Meeting of the Center for Advanced Materials Processing,” Canandaigua, New York (May 2009). The poster won the first place in the “most creative” category.

  10. S. S. Moganty,* J. Close, P. Goonetilleke, S. Krishnan, R. Baltus, D. Roy, “Electrochemical Supercapacitors Based on Polymerizabale Ionic Liquids,” AIChE 2008 Annual Meeting, Philadelphia, Pennsylvania (2008). Link

  11. K. E. Sohn,* S. Krishnan, M. Y. Paik, C. K. Ober, E. J. Kramer, D. A. Fischer, “Depth Profiling Using NEXAFS Spectroscopy,” American Physical Society March Meeting, Denver, CO, (2007). Link

  12. C. J. Weinman,* S. Krishnan, D. Park, M. Y. Paik, K. Wong, D. A. Fischer, D. L. Handlin Jr., G. L. Kowalke, D. E. Wendt, K. E. Sohn, E. J. Kramer, C. K. Ober, “Antifouling Block Copolymer Surfaces that Resist Settlement of Barnacle Larvae,” 223rd ACS National Meeting, Chicago, IL, Polym. Mater Sci. Eng. Preprints, 96, 597-598, (2007). Link

  13. S. Krishnan,* C. J. Weinman, D. Park, M. Y. Paik, R. Dong, C. K. Ober, K. E. Sohn, E. J. Kramer, “Environmentally Responsive Block Copolymers as Anti-Biofouling Surfaces,” Polymer Outreach Program, Cornell Center for Materials Research, Ithaca , NY , (2007). Link

  14. D. Park,* S. Krishnan, C. J. Weinman, M. Y. Paik, C. K. Ober, R. J. Ward, E. R. Angert, K. E. Sohn, E. J. Kramer, D. L. Handlin, “Novel Anti-Biofouling and Antimicrobial Block Copolymers: Polymer Synthesis and Surface Characterization,” Polymer Outreach Program, Cornell Center for Materials Research, Ithaca , NY , (2007). Link

  15. S. Krishnan,* C. J. Weinman, C. K. Ober, J. A. Finlay, M. E. Callow, J. A. Callow, K. E. Sohn, E. J. Kramer, “Environmentally Responsive Block Copolymers as Marine Antifouling Surfaces,” The 2nd Joint ONR/AMBIO Workshop on Marine Adhesion and Antifouling, Jacksonville, FL, (2006).

  16. C. Weinman,* S. Krishnan, D. W. Park, Q. Lin, E. J. Kramer, D. Handlin, C. Willis, C. K. Ober, “Multilayer Polymer Coatings with Controlled Surface Properties for Marine Antifouling Applications”, Polymer Outreach Program Symposium, Cornell Center for Materials Research, Ithaca, NY, (2006).

  17. K. E. Sohn,* A. Hexemer, S. Krishnan, M. Y. Paik, C. K. Ober, E. J. Kramer, D. A. Fischer, “Effect of Annealing Temperature on the Surface Composition of Block Copolymers with Semifluorinated Side Chains,” American Physical Society March Meeting, Baltimore, MD, (2006).

  18. S. Krishnan,* C. K. Ober, R. Ayothi, Q. Lin, M. Y. Paik, C. J. Weinman, A. Hexemer, E. J. Kramer, D. A. Fischer, “Fluoropolymers at Biological and Marine Interfaces,” Materials Science & Engineering in 2020, Cornell University, Ithaca, NY (2005).

  19. Q. Lin,* S. Krishnan, M. Paik, P. Busch, C. K. Ober, A. Hexemer, K. E. Sohn, E. J. Kramer, G. L. Kowalke, D. E. Wendt, “Semifluorinated Triblock Copolymers as Surface Active Components for Multilayer Marine Antifouling Coatings,” Polymer Preprints, 46, 635-636, (2005). Link

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CURRENT AND PAST LAB MEMBERS

Graduate Advisees

Undergraduate Research Students

Visiting Scientist

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MEMBERSHIPS AND AFFILIATIONS

  1. American Institute of Chemical Engineers (AIChE)

  2. American Chemical Society (ACS)

  3. American Society for Engineering Education (ASEE)

  4. Center for Advanced Materials Processing, Clarkson University

  5. Sigma Xi, The Scientific Research Society

  6. Society of Plastics Engineers (SPE)

  7. Phi Beta Delta Honor Society for International Scholars

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