Dr. James W. Evans
Ames Laboratory Associate and Professor, Iowa State University
315 Wilhelm Hall
The Ames Laboratory
Ames, IA 50011-3020Phone 515-294-1638
- Spatiotemporal behavior in chemisorption and catalysis on metal surfaces: realistic atomistic-level modeling of reaction kinetics; analysis of chemical diffusion and multi-scale modeling of reaction-diffusion behavior; analysis of fluctuations in nanoscale systems.
- Fundamental statistical mechanical studies of far-from-equilibrium reaction-diffusion phenomena including kinetic phase transitions.
- Interplay between anomalous transport and reaction in catalytically-functionalized mesoporous and nanoporous materials.
- Self-assembly and stability of single- and multi-component epitaxial metal nanostructures formed by deposition on single-crystal surfaces.
- Growth and relaxation epitaxial thin films: submonolayer nucleation & growth of islands; multilayer kinetic roughening; post-deposition coarsening; step flow during growth and erosion.
- Realistic multi-site lattice-gas models for CO-oxidation on Pd(100), Rh(100), Pt(100), and other surfaces.
- Heterogeneous-coupled-lattice-gas modeling of patterns and fronts in catalytic surface reactions (HCLG is our Heterogeneous Multiscale Method).
- Statistical mechanical analysis of discontinuous poisoning transitions (including generic two-phase coexistence and metastability) in reaction-diffusion models.
- Modeling of catalytic conversion reactions and polymerization reactions in nanoporous systems with single-file diffusion.
- Continuous-random-network models structure of amorphous materials (e.g., mesoporous oxide catalysts).
- Formation of epitaxial nanostructures by deposition on a NiAl(110) binary alloy substrate, including analysis of alloy self-growth.
- Effect of chalcogen additives (S, O) on stability of noble metal surface nanostructures (including additive-enhanced coarsening and cluster mobility).
- Predictive atomistic and coarse-grained modeling of homoepitaxial thin film growth (for both submonolayer and multilayer regimes).
- Development of general multi-site lattice-gas models and KMC simulation algorithms incorporating precise kinetics (surface diffusion barriers) for epitaxial systems.
(Chronologically most recent on top)Education
- Postdoctoral Fellow, 1979-81, Chemical Physics, Iowa State University
- Ph.D. 1979, Mathematical Physics, University of Adelaide, Australia
- B.Sc. (Hons) 1975, Mathematics, University of Melbourne, Australia
(Chronologically most recent on top)Professional Appointments
- Senior Scientist, 1996-present; Chemist, 1993-96; Associate Scientist, 1983-93; Assistant Chemist, 1982-83, Ames Laboratory-USDOE.
- Professor of Physics & Astronomy, 2010-present, Iowa State University
- Professor of Mathematics, 1996-present; Associate Professor of Mathematics, 1991-1996, Iowa State University.
- Visiting Scientist, Institute of Mathematics & its Applications, U. Minnesota, 2009.
- Visiting Scientist, Institute of Physics - CAS, Beijing, 2009.
- Visiting Scientist, Ecole des Mines, Nancy, France, 2000.
- Visiting Scientist, Fritz Haber Institute, Berlin, Germany, 1991.
(Chronologically most recent on top)Honors & Awards
- Fellow of the American Physical Society, 2002-present.
(Chronologically most recent on top)Publications with the Ames Laboratory
2010Shen M M; Jenks C J; Evans J W; Thiel P A . 2010. Rapid decay of vacancy islands at step edges on Ag(111): step orientation dependence. Journal of Physics-Condensed Matter. 22:215002.
Liu D J; Chen H T; Lin V S Y; Evans J W . 2010. Polymer length distributions for catalytic polymerization within mesoporous materials: Non-Markovian behavior associated with partial extrusion. Journal of Chemical Physics. 132:154102.
Han Y; Unal B; Jing D P; Qin F L; Jenks C J; Liu D J; Thiel P A; Evans J W . 2010. Formation and coarsening of Ag(110) bilayer islands on NiAl(110): STM analysis and atomistic lattice-gas modeling. Physical Review B. 81:115462.
2009Albao M A; Evans J W; Chuang F C . 2009. A kinetic Monte Carlo study on the role of defects and detachment in the formation and growth of In chains on Si(100). Journal of Physics-Condensed Matter. 21:405002.
Jing D P; Unal B; Qin F L; Yuen C; Evans J W; Jenks C J; Sordelet D J; Thiel P A . 2009. Stranski-Krastanov-like growth of an Ag film on a metallic glass. Thin Solid Films. 517:6486-6492.
Liu D J; Chen H T; Lin V S Y; Evans J W . 2009. Statistical mechanical modeling of catalytic polymerization within surface-functionalized mesoporous materials. Physical Review E. 80:011801.
Liu D J; Evans J W . 2009. Atomistic and multiscale modeling of CO-oxidation on Pd(100) and Rh(100): From nanoscale fluctuations to mesoscale reaction fronts. Surface Science. 603:1706-1716.
Shen M M; Liu D J; Jenks C J; Evans J W; Thiel P A . 2009. The effect of chalcogens (O, S) on coarsening of nanoislands on metal surfaces. Surface Science. 603:1486-1491.
Unal B; Fournee V; Thiel P A; Evans J W . 2009. Structure and Growth of Height-Selected Ag Islands on Fivefold i-AlPdMn Quasicrystalline Surfaces: STM Analysis and Step Dynamics Modeling. Physical Review Letters. 102:196103.
Zorn D D; Albao M A; Evans J W; Gordon M S . 2009. Binding and Diffusion of Al Adatoms and Dimers on the Si(100)-2 x 1 Reconstructed Surface: A Hybrid QM/MM Embedded Cluster Study. Journal of Physical Chemistry C. 113:7277-7289.