个人简介

Prof. Mason received B.S. dual degrees in physics with high honors and electrical engineering summa cum laude from the University of Maryland- College Park in 1989. Supported by an NSF graduate fellowship, he studied soft condensed matter physics at Princeton University and earned his Ph.D. in physics in 1995. His dissertation work explained the onset of elasticity as dispersions of solid spheres and liquid droplets are concentrated to form colloidal glasses, and he also created a technique, thermal "passive" microrheology, that is now widely used. His first postdoctoral position was at the Centre de Recherche Paul Pascal (CNRS) in Bordeaux, France, where he explored the complex structure-flow-composition interplay in emulsification, and he spent an additional postdoctoral year doing research in chemical and bio-engineering on biopolymer microrheology, including on DNA and F-actin, at Johns Hopkins University. As a staff scientist and PI at ExxonMobil Research and Engineering, starting in 1997, he led research in light and small angle neutron scattering from asphaltenes in hydrocarbon systems involving heavy oils, resulting in two US patents and an internal commercialization that improved refinery productivity. Joining UCLA in 2003 as an assistant professor of chemistry and of physics, he advanced to full professor in both departments in 2009. Prof. Mason's interdisciplinary research group of chemists and physicists is now working on directing assembly of custom-shaped lithographic particles as molecular mimics, fabricating complex nanoemulsions via non-equilibrium routes, modeling microrheology and aggregation, and exploring biopolymer-colloid interactions in electrophoresis. Prof. Mason has over 100 publications in peer-reviewed journals, including Nature, Science, PNAS, PRL, and JACS, and 10 issued US patents, 8 of which are based on research at UCLA. He is a fellow and life member of the American Physical Society, and he is a recipient of an NSF Career Award.

研究领域

Physical/Biophysics/Nanoscience/Materials

Microrheology is the study of the deformation and flow of complex fluids at the microscale. As a graduate student, T.G. Mason invented an approach in 1993 for deducing local and macroscopic viscoelastic shear moduli of complex fluids by measuring the thermal fluctuations of colloidal particles introduced as probes. This approach, later published in Physical Review Letters in 1995 with his advisor D.A. Weitz (PRL 74 1250), sparked the modern field of microrheology. We continue research on glasses using thermal microrheology; our group also uses laser tweezers to manipulate dielectric probe microparticles such as polystyrene spheres and wax disks in order to investigate non-linear rheological properties.

近期论文

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Nanoparticle size distributions measured by optical adaptive-deconvolution passivated-gel electrophoresis. Zhu X, Mason TG. J Colloid Interface Sci. 2014 Aug 22;435C:67-74. doi: 10.1016/j.jcis.2014.08.016. [Epub ahead of print] PMID: 25218049 Crossover between entropic and interfacial elasticity and osmotic pressure in uniform disordered emulsions. Mason TG, Scheffold F. Soft Matter. 2014 Aug 20;10(36):7109-16. doi: 10.1039/c4sm01125b. PMID: 25111129 The jamming elasticity of emulsions stabilized by ionic surfactants. Scheffold F, Wilking JN, Haberko J, Cardinaux F, Mason TG. Soft Matter. 2014 Jul 28;10(28):5040-4. doi: 10.1039/c4sm00389f. PMID: 24913542 Passivated gel electrophoresis of charged nanospheres by light-scattering video tracking. Zhu X, Mason TG. J Colloid Interface Sci. 2014 Aug 15;428:199-207. doi: 10.1016/j.jcis.2014.04.024. Epub 2014 Apr 26. PMID: 24910054 Self-limiting droplet fusion in ionic emulsions. Fryd MM, Mason TG. Soft Matter. 2014 Jul 14;10(26):4662-73. doi: 10.1039/c4sm00453a. PMID: 24839170 Random walks of colloidal probes in viscoelastic materials. Khan M, Mason TG. Phys Rev E Stat Nonlin Soft Matter Phys. 2014 Apr;89(4):042309. Epub 2014 Apr 29. PMID: 24827253 Entropic chiral symmetry breaking in self-organized two-dimensional colloidal crystals. Mayoral K, Mason TG. Soft Matter. 2014 Jul 7;10(25):4471-8. doi: 10.1039/c4sm00261j. PMID: 24825352 Self-organized chiral colloidal crystals of Brownian square crosses. Zhao K, Mason TG. J Phys Condens Matter. 2014 Apr 16;26(15):152101. doi: 10.1088/0953-8984/26/15/152101. Epub 2014 Mar 27. PMID: 24675056 Cerberus nanoemulsions produced by multidroplet flow-induced fusion. Fryd MM, Mason TG. Langmuir. 2013 Dec 23;29(51):15787-93. doi: 10.1021/la403817a. Epub 2013 Dec 11. PMID: 24328235 Self-assembling semiconducting polymers--rods and gels from electronic materials. Clark AP, Shi C, Ng BC, Wilking JN, Ayzner AL, Stieg AZ, Schwartz BJ, Mason TG, Rubin Y, Tolbert SH. ACS Nano. 2013 Feb 26;7(2):962-77. doi: 10.1021/nn304437k. Epub 2013 Feb 6. PMID: 23346927 Twinning of rhombic colloidal crystals. Zhao K, Mason TG. J Am Chem Soc. 2012 Oct 31;134(43):18125-31. doi: 10.1021/ja308214m. Epub 2012 Oct 18. PMID: 23075224 Nanoinclusions in cryogenically quenched nanoemulsions. Fryd MM, Mason TG. Langmuir. 2012 Aug 21;28(33):12015-21. doi: 10.1021/la301834x. Epub 2012 Aug 10. PMID: 22881456