个人简介

B.S., The Ohio State University (1990): Chemistry Ph.D., Yale University (1995): Organic Chemistry Advisor: J. Michael McBride Postdoctoral Associate, University of Colorado (1995–97) Advisor: David M. Walba

研究领域

Organic molecular switches

My research is focused on the understanding of intermolecular effects in ordered media. In particular we are investigating the effect different media impart upon chemical reactivity with the goal of designing organic systems with specific functional control. This broad research goal encompasses a number of different fields including semiconducting polymers for molecular electronics, biodegradable polymers for drug delivery and the synthesis of carbon nanotubes of one type through topochemical reactions.

近期论文

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Samodha Gunathilake, Peishen Huang, Mahesh Bhatt, Elizabeth A. Rainbolt, Mihaela C. Stefan, Michael C. Biewer, Nitrogen Containing Graphene Like Structures from Pyrolysis of Pyrimidine Polymers for Polymer/Graphene Hybrid Field Effect Transistors, RSC Advances, 2014, 4(79), 41997-42001. Harsha D. Magurudeniya, Ruvini S. Kularatne, Elizabeth A. Rainbolt, Mahesh P. Bhatt, John W. Murphy, Elena E. Sheina, Bruce E. Gnade, Michael C. Biewer, Mihaela C. Stefan, Benzodithiophene Homopolymers Synthesized by Grignard Metathesis (GRIM) and Stille Coupling Polymerizations, J. Mater. Chem. A., 2014, 2 (23), 8773-8781. Mahesh Bhatt, Jia Du, Elizabeth Rainbolt, Taniya MSK Pathiranage, Peishen Huang, James Reuther, Bruce M. Novak, Michael C. Biewer, Mihaela C. Stefan, Semiconducting Liquid Crystalline Block Copolymer Containing Regioregular Poly(3-Hexylthiophene) and Nematic Poly(n-Hexyl Isocyanate), J. Mater, Chem. A, 2014, 2(38), 16148-16156. Mahesh P. Bhatt, Harsha D. Magurudeniya, Elizabeth A. Rainbolt, Peishen Huang, Dusanthi S. Dissanayake, Michael C. Biewer, Mihaela C. Stefan, Poly(3-hexylthiophene) Nanostructured Materials for Organic Electronics Applications, J. Nanoscience and Nanotechnology, 2014, 14, 1033-1050. Ruvini S. Kularatne, Ferdinand J. Taenzler, Harsha D. Magurudeniya, Jia Du, John W. Murphy, Elena E. Sheina, Bruce E. Gnade, Michael C. Biewer, Mihaela C. Stefan, Structural Variation of Donor-Acceptor Copolymers Containing Benzodithiophene with Bithienyl Substituents to Achieve High Open Circuit Voltage in Bulk Heterojunction Solar Cells, J. Mater. Chem. A, 2013, 1(48), 15535-15543. Elizabeth Rainbolt, Katherine Washington, Michael C. Biewer, Mihaela C. Stefan, Towards Smart Polymeric Drug Carriers: Self-assembling gamma-substituted Polycaprolactones with Highly Tunable Thermoresponsive Behavior, J. Mater.Chem. B, 2013, 1(47), 6532-6537. Jing Hao, Yixing Cheng, R. J. K. Udayana Ranatunga, Suchithra Senevirathne, Michael C. Biewer, Steven O. Nielsen, Qian Wang, Mihaela C. Stefan, A Combined Experimental and Computational Study of the Substituent Effect on Micellar Behavior of gamma-substituted Thermoresponsive Amphiphilic Poly(epsilon-caprolactone)s, Macromolecules, 2013, 46(12), 4829-4838. Samodha S. Gunathilake, Harsha D. Magurudeniya, Peishen Huang, Hien Nguyen, Elizabeth A. Rainbolt, Mihaela C. Stefan, Michael C. Biewer, Synthesis and Characterization of Novel Semiconducting Polymers Containing Pyrimidine, Polymer Chemistry, 2013, 4(20), 5216-5219. Prakash Sista, Ruvini S. Kularatne, Michael E. Mulholland, Mitchell Wilson, Natalie Holmes, Xiaojing Zhou, Paul C. Dastoor, Warwick Belcher, Seth C. Rasmussen, Michael C. Biewer, Mihaela C. Stefan, Synthesis and Photovoltaic Performance of Donor-Acceptor Polymers Containing Benzo[1,2-b:4,5-b']dithiophene with Thienyl Substituents, J. Polym. Sci., Part A: Polym. Chem., 2013, 51(12), 2622-2630. Jing Hao, Elizabeth A. Rainbolt, Katherine Washington, Michael C. Biewer, Mihaela C. Stefan, Synthesis of Functionalized Poly(caprolatone)s and Their Application as Micellar Drug Delivery Systems, Current Organic Chemistry, 2013, 17, 930-942. Prakash Sista, Mitchell Wilson, Natalie Holmes, Ruvini S. Kularatne, Elizabeth A. Rainbolt, Michael C. Biewer, Paul C. Dastoor, Warwick Belcher, Mihaela C. Stefan, Non-Dependence of Polymer to PCBM Weight Ratio on the Performance of Bulk Heterojunction Solar Cells with Benzodithiophene Donor Polymer, Science of Advanced Materials, 2013, 5, 512-518. Sussana A. Elkassih, Prakash Sista, Harsha D. Magurudeniya, Alexios Papadimitratos, Anvar A. Zakhidov, Michael C. Biewer, Mihaela C. Stefan, Phenothiazine Semiconducting Polymer for Light Emitting Diodes, Macromolecular Chemistry & Physics, 2013, 214(5), 572-577. Ruvini S. Kularatne, Harsha D. Magurudeniya, Prakash Sista, Michael C. Biewer, Mihaela C. Stefan, Donor-Acceptor Semiconducting Polymers for Organic Solar Cells, J. Polym. Sci., Part A: Polym. Chem., 2013, 51(4), 743-768. Ruvini S. Kularatne, Prakash Sista, Hien Q. Nguyen, Mahesh P. Bhatt, Michael C. Biewer, Mihaela C. Stefan, Donor-Acceptor Semiconducting Polymers Containing Benzodithiophene with Bithienyl Substituents, Macromolecules, 2012, 45(19), 7855-7862. Mahesh P. Bhatt, Prakash Sista, Jing Hao, Nadia Hundt, Michael C. Biewer, Mihaela C. Stefan, Electronic Properties-Morphology Correlation of a Rod-Rod Semiconducting Liquid Crystalline Block Copolymer containing Poly(3-Hexylthiophene), Langmuir, 2012, 28(35), 12762-12770. Praksh Sista, Peishen Huang, Samodha S. Gunathilake, Mahesh P. Bhatt, Ruvinin S. Kularatne, Mihaela C. Stefan, Michael C. Biewer, Synthesis and Optoelectronic Properties of Novel Benzodifuran Semiconducting Polymers, J. Polym. Sci. Part A: Polym. Chem, 2012, 50(20), 4316-4324. Yixing Chen, Jing Hao, L. Andrew Lee, Michael C. Biewer, Qian Wang, Mihaela C. Stefan, Thermally-controlled Release of Anti-cancer Drug from Self-assembled g-substituted Amphiphilic Poly(e-caprolactone) Micellar Nanoparticles, Biomacromolecules, 2012, 13(7), 2163-2173. Prakash Sista, Bofei Xue, Mitchell Wilson, Natalie Holmes, Ruvini S. Kularatne, Hien Nguyen, Paul C. Dastoor, Warwick Belcher, Katelyn Poole, Benjamin G. Janesko, Michael C. Biewer, Mihaela C. Stefan, Influence of the Alkyl Substituents Spacing on the Solar Cell Performance of Benzodithiophene Semiconducting Polymers, Macromolecules, 2012, 45(2), 772-780. Prakash Sista, Michael C. Biewer, Mihaela C. Stefan, Benzo[1,2-b:4,5-b']dithiophene Building Block for the Synthesis of Semiconducting Polymers, Macromolecular Rapid Commun., 2012, 33(1), 9-20. Harsha Magurudeniya, Prakash Sista, Jacob K. Westbrook, Taryn E. Ourso, Khuong Nguyen, Marie C. Maher, Mussie G. Alemseghed, Michael C. Biewer, Mihaela C. Stefan, Nickel(II) alpha-Diimine Catalyst for Grignard Metathesis (GRIM) Polymerization, Macromolecular Rapid Commun., 2011, 32(21), 1748-1752.