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Associate Professor Wu,Kuo-An
 
Associate Professor
Wu,Kuo-An
 
 
 
 
 
Office:886-3-5742615 (PHYS R610)
Fax:886-3-5723052
E-mail:kuoan@phys.nthu.edu.tw
Condensed Matter Theory Group

  Education
  1. 2001-2006 Ph.D. in Physics, Northeastern University, U.S.A.
  2. 1997-1999 M.S. in Physics, National Central University, R.O.C.
  3. 1993-1997 B.S. in Physics, National Central University, R.O.C.
  Professional Experience
Current position: 
  1. 2016.8-present, Associate Professor of Physics, National Tsing Hua University
Experience:
  1. 2011-2016, Assistant Professor of Physics, National Tsing Hua University
  2. 2009-2010, Research Associate, Materials Science & Engineering Dept., Northwestern University, USA
  3. 2006-2008, Postdoctoral Researcher, Materials Science & Engineering Dept., Northwestern University, USA
  Research Fields
  1. Condensed Matter
  2. Pattern Formation
  3. Computational Materials Science at the Nanoscale
  4. Mathematical Biology - Synchronization and Population Dynamics
  5. Polymer Physics
 
  Research Interests and achievement
Updated on August 14, 2012
My research interests lie in theoretical understanding of interfacial morphology and pattern formation in nonequilibrium systems. These subjects occurs at different length and time scales ranging from materials to biological systems. For example, during solidification the interfacial anisotropy plays a crucial role in determining the morphology of crystal growth, we have theoretically shown that the anisotropy originates from underlying crystal symmetries and is closely related to the different decay rate of density waves. Another interesting example is the rich nanophase behavior of polyelectrolyte gels in poor solvent. We have demonstrated that how the nanophase in polyelectrolyte gels modulates its characteristic length scale and the possibility of controlling solvent channels by manipulating environmental stimuli. 

I am also interested in continuum modeling of materials at different length scales, in particular, the atomistic length scales. Over the last few years, the "phase field crystal" method has emerged as an attractive computational approach to tackle problems where atomistic and continuum scales are tightly coupled. We have employed this method to explore interesting phenomena such as nano-island formation (stress-induced instability), evolution of nanocrystalline grain growth, interfacial anisotropy at equilibrium, etc. In addition, we have developed a phase field crystal model for face-centered cubic lattices and stable fcc-liquid interfaces by coupling two different sets of crystal density waves. We have also presented a systematic way to control crystalline symmetries for this method.  
   
  Selected Publications
  1. K.-A. Wu, C.-H. Wang, and A. Karma, Two-Mode Ginzburg-Landau Theory of Crystalline Anisotropy for Fcc-Liquid Interfaces, Phys. Rev. B 93, 054114 (2016)
  2. S.-C. Lin, M.-W. Liu, M. P. Gururajan, and K.-A. Wu, Modified Young's Equation for Equilibrium Dihedral Angles of Grain Boundary Grooves in Thin Films at the Nanoscale, Acta Materialia 102, 364 (2016)
  3. H.-Y. Kuo and K.-A. Wu, Synchronization and Plateau Splitting of Coupled Oscillators with Long-Range Power-Law Interactions, Phys. Rev. E 92, 062918(2015)
  4. K.-A. Wu, C.-H. Wang, and A. Karma, Ginzburg-Landau Theory of the Bcc-Liquid Interface Kinetic Coefficient, Phys. Rev. B 91, 014107 (2015)
  5. E. J. Schwalbach, J. A. Warren, K.-A. Wu, and P. W. Voorhees, Phase-Field Crystal Model with a Vapor Phase, Phys. Rev. E 88, 023306 (2013)
  6. K.-A. Wu, P. K. Jha, and M. O. de la Cruz, Pattern Selection in Polyelectrolyte Gels by Nonlinear Elasticity, Macromolecules 45, 6652 (2012)
  7. K.-A. Wu, and P. W. Voorhees, Phase Field Crystal Simulations of Nanocrystalline Grain Growth in Two Dimensions, Acta Materialia 60, 407-419 (2012)
  8. K.-A. Wu, P. K. Jha, and M. O. de la Cruz, Control of Nanophases in Polyelectrolyte Gels by Salt Addition, Macromolecules 43, 9160 (2010)
  9. K.-A. Wu, A. Adland, and A. Karma, Phase Field Crystal Model for FCC Ordering,Phys. Rev. E 76, 184107 (2010)
  10. K.-A. Wu, M. Plapp, and P. W. Voorhees, Controlling Crystalline Symmetries in Phase Field Crystal Models, J. Phys.: Condens. Matter 22, 364102 (2010)
  11. K.-A. Wu, and P. W. Voorhees, Morphological Instability of Ferromagnetic Thin Films, J. Appl. Phys. 106, 073916 (2009) [Selected for the October 26th, 2009 issue of Virtual Journal of Nanoscale Science & Technology]
  12. K.-A. Wu, and P. W. Voorhees, Stress-Induced Morphological Instabilities at the Nanoscale Examined Using the Phase Field Crystal Approach, Phys. Rev. B 80, 125408 (2009) [Selected for the September 28th, 2009 issue of Virtual Journal of Nanoscale Science & Technology]
  13. K.-A. Wu, and A. Karma, Phase-Field Crystal Modeling of Equilibrium Bcc-Liquid Interfaces, Phys. Rev. B 76, 184107 (2007)
  14. K.-A. Wu, and A. Karma, Ginzburg-Landau Theory of Crystalline Anisotropy for Bcc-Liquid Interfaces, Phys. Rev. B 73, 094101 (2006)
  15. P. Chen, and K.-A. Wu, Subcritical Bifurcation and Nonlinear Balloons in Faraday Waves, Phys. Rev. Lett. 85, 3813 (2001)
 
 
 
 
 
 

 

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