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Education |
- 2001-2006 Ph.D. in Physics, Northeastern University, USA
- 1997-1999 M.S. in Physics, National Central University, R.O.C.
- 1993-1997 B.S. in Physics, National Central University, R.O.C.
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Professional Experience |
Current positionˇG
- 2011.2-present, Assistant Professor of Physics, National Tsing Hua University
ExperienceˇG
- 2009-2010, Research Associate, Materials Science & Engineering Dept., Northwestern University, USA
- 2006-2008, Postdoctoral Researcher, Materials Science & Engineering Dept., Northwestern University, USA
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Research Fields |
- Condensed Matter
- Pattern Formation
- Computational Materials Science
- Polymer Physics
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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.
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Selected Publications |
- [2012] K.-A. Wu, P. K. Jha, and M. O. de la Cruz, Pattern Selection in Polyelectrolyte Gels by Nonlinear Elasticity, Macromolecules (accepted) (2012)
- [2012] K.-A. Wu, and P. W. Voorhees, Phase Field Crystal Simulations of Nanocrystalline Grain Growth in Two Dimensions, Acta Materialia, 60, 407-419 (2012)
- [2010] 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)
- [2010] K.-A. Wu, A. Adland, and A. Karma, Phase Field Crystal Model for FCC Ordering, Phys. Rev. E, 76, 184107 (2010)
- [2010] K.-A. Wu, M. Plapp, and P. W. Voorhees, Controlling Crystalline Symmetries in Phase Field Crystal Models, J. Phys.: Condens. Matter, 22, 364102 (2010)
- [2009] 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]
- [2009] 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]
- [2007] K.-A. Wu, and A. Karma, Phase-Field Crystal Modeling of Equilibrium Bcc-Liquid Interfaces, Phys. Rev. B, 76, 184107 (2007)
- [2006] K.-A. Wu, and A. Karma, Ginzburg-Landau Theory of Crystalline Anisotropy for Bcc-Liquid Interfaces, Phys. Rev. B, 73, 094101 (2006)
- [2001] P. Chen, and K.-A. Wu, Subcritical Bifurcation and Nonlinear Balloons in Faraday Waves, Phys. Rev. Lett., 85, 3813 (2001)
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