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
2012Guo X F; Unruh D K; Liu D J; Evans J W . 2012. Tricriticality in generalized Schloegl models for autocatalysis: Lattice-gas realization with particle diffusion. Physica A-Statistical Mechanics and Its Applications. 391:633-646.
2011Roskop L; Evans J W; Gordon M S . 2011. Adsorption and Diffusion of Gallium Adatoms on the Si(100)-2 x 1 Reconstructed Surface: A Multiconfiguration Self-Consistent Field Study Utilizing Molecular Surface Clusters. Journal of Physical Chemistry C. 115:23488-23500.
Thiel P A; Unal B; Jenks C J; Goldman A I; Canfield P C; Lograsso T A; Evans J W; Quiquandon M; Gratias D; Van Hove M A . 2011. A Distinctive Feature of the Surface Structure of Quasicrystals: Intrinsic and Extrinsic Heterogeneity. Israel Journal of Chemistry. 51:1326-1339.
Han Y; Jing D P; Unal B; Thiel P A; Evans J W . 2011. Far-from-equilibrium film growth on alloy surfaces: Ni and Al on NiAl(110). Physical Review B. 84:113414.
Wang C J; Guo X F; Liu D J; Evans J W . 2011. Schloegl's Second Model for Autocatalysis on a Cubic Lattice: Mean-Field-Type Discrete Reaction-Diffusion Equation Analysis. Journal of Statistical Physics. 144:1308-1328.
Han Y; Unal B; Jing D P; Thiel P A; Evans J W . 2011. Temperature-dependent growth shapes of Ni nanoclusters on NiAl(110). Journal of Chemical Physics. 135:084706.
Belianinov A; Unal B; Ho K M; Wang C Z; Evans J W; Tringides M C; Thiel P A . 2011. Nucleation and growth of Ag islands on the (root 3 x root 3)R30 degrees phase of Ag on Si(111). Journal of Physics-Condensed Matter. 23:265002.
Liu D J; Wang J; Ackerman D M; Slowing I I; Pruski M; Chen H T; Lin V S Y; Evans J W . 2011. Interplay between Anomalous Transport and Catalytic Reaction Kinetics in Single-File Nanoporous Systems. ACS Catalysis. 1:751-763.
Shen M M; Jenks C J; Evans J W; Thiel P A . 2011. How Sulfur Controls Nucleation of Ag Islands on Ag(111). Topics in Catalysis. 54:83-89.
Ackerman D M; Wang J; Wendel J H; Liu D J; Pruski M; Evans J W . 2011. Catalytic conversion reactions mediated by single-file diffusion in linear nanopores: Hydrodynamic versus stochastic behavior. Journal of Chemical Physics. 134:114107.