个人简介

BS, MS - Colorado School of Mines PhD - University of Delaware Post-Doctoral Study - University of Wisconsin, Madison

研究领域

Clathrate Hydrates, Biomolecular Systems

The research in my group covers broad areas ranging from soft condensed matter to structured materials to biological systems, with emphasis on molecular descriptions as the basis to understand macroscopic properties and behavior. Theoretical, computational, and experimental methods are employed as research tools to broaden our fundamental knowledge while applying those principles to tackle practical problems. Every topic of research emphasizes a multidisciplinary approach that encompasses knowledge and skills covering the chemical, physical, and life sciences, computer science, and engineering. Some of the current projects include: fundamentals and applications of clathrate hydrates; biophysics of cellular systems; sensory response to stimulation; mechanisms for fatty-acid induced cytotoxicity; bioactivity of dendritic amphiphilic compounds; and stabilization of biological materials. Also, as co-Director for the Center for Hydrate Research, we are also interested in many other aspects of gas hydrates, including: Flow Assurance, Hydrates in Nature, and Hydrogen Storage. Please visit the Center for Hydrate Research website to learn more about the research activities in these areas.

近期论文

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M. Hiratsuka, R. Ohmura, A. K. Sum, and K. Yasuoka, “Vibrational Spectra of Deuterated Methane and Water Molecules in Structure I Clathrate Hydrate from ab initio MD Simulation,” Molecular Simulation, in press. [doi: 10.1080/08927022.2014.929125] Z. T. Ward, R. A. Marriott, A. K. Sum, E. D. Sloan, C. A. Koh, “Equilibrium Data of Gas Hydrates containing Methane, Propane, and Hydrogen Sulfide,” Journal of Chemical Engineering Data, in press. [doi: 10.1021/je5007423] Z. T. Ward, C. E. Deering, R. A. Marriott, A. K. Sum, E. D. Sloan, C. A. Koh, “Phase Equilibrium Data and Model Comparisons for H2S Hydrates,” Journal of Chemical Engineering Data, in press. [doi: 10.1021/je500657f] M. N. Khan, L. J. Rovetto, C. J. Peters, E. D. Sloan, A. K. Sum, and C. A. Koh, “Effect of Hydrogen To Methane Concentration Ratio on the Phase Equilibria of Quaternary Hydrate Systems,” Journal of Chemical Engineering Data, in press. [doi: 10.1021/je500675q] P. G. Lafond, R. G. Grim, and A. K. Sum, “Clathrate Hydrate Equilibrium Modeling: Do Self-Consistent Cell Models Provide Unique Equilibrium Solutions?,” Canadian Journal of Chemistry, in press. Special Issue Honoring John Ripmeester. T. Uchida, M. Nagayama, K. Yamazaki, K. Gohara, and A. K. Sum, “Raman Spectra Measurements on DEPC Liposome and Cell Membrane of Living Neuron under Xenon Pressure,” Canadian Journal of Chemistry, in press. Special Issue Honoring John Ripmeester. Z. M. Aman, L. E. Zerpa, C. A. Koh, and A. K. Sum, “Development of a Tool to Assess Hydrate Plug Formation Risk in Oil-Dominant Pipelines,” SPE Journal, in press. D. Yuhara, B. C. Barnes, D. Suh, B. C. Knott, G. T. Beckham, K. Yasuoka, D. T. Wu, and A. K. Sum, “Nucleation Rate Analysis of Methane Hydrate from Molecular Dynamics Simulations,” Faraday Discussions, in press. Contributions to “Faraday Discussions on Nucleation - A transition state to the directed assembly of materials.” [doi: 10.1039/c4fd00219a] J. Chen, K.-L. Yan, G.-J. Chen, C.-Y. Sun, B. Liu, N. Ren, D.-J. Shen, M. Niu, Y.-N. Lv, N. Li, and A. K. Sum, “Insights into the Formation Mechanism of Hydrate Plugging in Pipelines,” Chemical Engineering Science, 122, 284-290 (2015). [doi: 10.1016/j.ces.2014.09.039] B. R. Lee, C. A. Koh, and A. K. Sum, “Mechanism of Cohesive Forces of Cyclopentane Hydrates with and without Thermodynamic Inhibitors,” Industrial & Engineering Chemistry Research, 53 (47), 18189-18193 (2014). [doi: 10.1021/ie5032716] B. C. Barnes, B. C. Knott, G. T. Beckham, D. T. Wu, and A. K. Sum, “Reaction Coordinate of Incipient Methane Clathrate Hydrate Nucleation,” Journal of Physical Chemistry B, 118 (46), 13236-13243 (2014). [doi: 10.1021/jp507959q] Z. M. Aman, E. D. Sloan, A. K. Sum, and C. A. Koh, “Adhesion Force Interactions between Cyclopentane Hydrate and Physically and Chemically Modified Surfaces,” Physical Chemistry Chemical Physics, 16, 25121-25128 (2014). [doi: 10.1039/c4cp02927e] B. R. Lee, C. A. Koh, and A. K. Sum, “Development of A High Pressure Micromechanical Force Apparatus,” Review of Scientific Instruments, 85, 095120-4 (2014). [doi: 10.1063/1.4896661] R. G. Grim, B. C. Barnes, P. G. Lafond, W. Kockelman, D. Kenn, A. Soper, M. Hiratsuka, K. Yasuoka, C. A. Koh, and A. K. Sum, “Observation of Interstitial Molecular Hydrogen in Clathrate Hydrates ,” Angewandte Chemie International Edition, 53 (40), 10710-10713 (2014) [doi: 10.1002/anie.201406546] B. R. Lee, C. A. Koh, and A. K. Sum, “Quantitative Measurement of CH4 Production from Hydrates with the Injection of Liquid CO2,” Physical Chemistry Chemical Physics, 16 (28), 14922-14927 (2014). [doi: 10.1039/C4CP01780C] R. Wu, Z. M. Aman, E. F. May, K. A. Kozielski, P. G. Hartly, N. Maeda, and A. K. Sum,“The Effect of A Kinetic Hydrate Inhibitor PVCap on Cyclopentane Hydrate Cohesion Forces and Growth,” Energy & Fuels, 28 (6), 3632-3637 (2014). [doi: 10.1021/ef500265w] S.-L. Li, C.-Y. Sun, G.-J. Chen, Z.-Y. Li, Q.-L. Ma, L.-Y. Yang, and A. K. Sum,“Measurements of Hydrate Film Fracture under Conditions Simulating the Rise of Hydrated Gas Bubbles in Deep Water,” Chemical Engineering Science, 116, 109-117 (2014). [doi: 10.1016/j.ces.2014.04.009] B. C. Barnes, G. T. Beckham, D. T. Wu, and A. K. Sum, “Two-Component Order Parameter for Quantifying Clathrate Hydrate Nucleation and Growth,” Journal of Chemical Physics, 140 (16), 164506-6 (2014). [doi: 10.1063/1.4871898] L. Chen, E. D. Sloan, C. A. Koh, and A. K. Sum, “Methane Hydrate Formation and Dissociation on Suspended Gas Bubbles in Water,” Journal of Chemical Engineering Data, 59 (4), 1045-1051 (2014). Invited contribution for special issue honoring Grant Wilson. Image from paper in Cover Page. [doi: 10.1021/je400765a] Y. Matsumoto, R. G. Grim, T. Sugahara, K. Ohgaki, E. D. Sloan, C. A. Koh, and A. K. Sum, “Investigating the Thermodynamic Stabilities of Hydrogen and Methane Binary Gas Hydrates,” Journal of Physical Chemistry C, 118 (7), 3783-3788 (2014). [doi: 10.1021/jp411140z]