visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

SWELLABLE COLLOIDAL PARTICLES ARE SWELL

2015.12.06 21:49

관리자 조회 수:1799

날짜 2015-12-09 14:00 
일시 2015/12/09, 2PM 
장소 E6-2, #1323 
연사 Arjun G. Yodh (University of Pennsylvania) 

SWELLABLE COLLOIDAL PARTICLES ARE SWELL


ABSTRACT
I will discuss soft matter experiments from my lab that explore fundamental questions about phase transition mechanisms and glasses. Briefly, soft materials deform easily when pushed, and some important examples include colloidal suspensions, emulsions, oil-water interfaces, polymer & surfactant solutions, liquid crystals, and mixtures thereof. Our recent work develops and takes advantage of a novel class of colloidal suspension composed of temperature-sensitive hydrogel particles; the temperature “knob” permits easy control of particle packing and simultaneous viewing by video microscopy [1]. These features, in turn, enable us to use colloidal crystals to answer fundamental questions about “how and where” crystal melting begins and about the mechanisms by which one crystal transforms to another during a solid-solid phase transition [2]. These features have also enabled us to critically explore open questions about disordered solids, e.g., how glasses rearrange internally when responding to mechanical stress [3]. After a broad introduction, I will describe these new experiments.
REFERENCES
[1] Yunker, P.J., Chen, K., Gratale, M.D., Lohr, M.A., Still, T., Yodh, A.G., Reports on
Progress in Physics 77, 056601 (Epub 2014).
[2] A.M. Alsayed, M.F. Islam, J. Zhang, P.J. Collings, A.G. Yodh, Science 309, 1207-1210 (2005); Y. Han, Y. Shokef, A. Alsayed, P. Yunker, T. C. Lubensky, A. G. Yodh, Nature 456,
898-903 (2008); Peng, Y., Wang, F., Wang, Z., Alsayed, A.M., Zhang, Z., Yodh, A.G., and
Han, Y., Nature Materials (Epub 2014).
[3] Chen, K., Ellenbroek, W.G., Zhang, Z.X., Chen, D.T.N., Yunker, P.J., Henkes, S., Brito, C., Dauchot, O., van Saarloos, W., Liu, A.J., and Yodh, A.G., Phys. Rev. Lett. 105, 025501 (2010); Chen, K., Manning, M.L., Yunker, P.J., Ellenbroek, W.G., Zhang, Z., Liu, A.J., and Yodh, A.G., Phys. Rev. Lett. 107, 108301 (2011); Still, T., Goodrich. C.P., Chen, K., Yunker, P.J., Schoenholz, S., Liu, A.J., and Yodh, A.G., Phys. Rev. E 89, (2014).

번호 날짜 장소 제목
499 2009-02-23 16:00  E6, 1501  Physics Colloquium : 2009 Spring file
498 2009-09-07 16:00  E6, 1501  Physics Colloquium : 2009 Fall file
497 2009-10-21 16:00  E6, 1501  Interdimensional Universality of Dynamic Interfaces
496 2010-02-08 16:00  E6, 1501  Physics Ciolloquium : 2010 Spring file
495 2010-02-14 16:00  E6, 1501  Physics Colloquium - 2011 Spring file
494 2010-09-06 16:00  E6, 1501  Physics Colloquium : 2010 Fall file
493 2011-05-16 16:00  E6, 1501  Photonics with surface plasmon polaritons
492 2011-09-03 16:00  E6, 1501  Physics Colloquium : 2011 Fall file
491 2012-02-13 16:00  E6, 1501  Physics Colloquium : 2012 Spring
490 2012-04-02 16:00  E6, 1501  A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4
489 2013-03-11 16:00  E6, 1501  Physics Colloquium : 2013 Spring
488 2013-09-09 16:00  E6, 1501  Physics Colloquium : 2013 Fall
487 2014-03-10 16:00  E6, 1501  Physics Colloquium : 2014 Spring file
486 2014-05-28 17:00  KI Building, Matrix Hall  부품소재산업이 미래다
485 2014-12-22 14:00  E6, Rm1319  Dynamics of molecular motors: Power stroke vs Brownian ratchet file
484 2015-03-04 12:00  1323호, E6-2  Bioimaging and Biosensing Using Near-Infrared Fluorescence file
483 2015-03-09 16:00  E6, 1501  Physics Colloquium : 2015 Spring file
482 2015-03-13 14:00  Connect Room, KI Bldg.  The 15th Innovative Workshop on Soft/Bio Materials file
481 2015-06-03 12:00  Room 101, E11  The First Wednesday Multidisciplinary Forum file
480 2015-07-15 14:00  E6-2,1323  Electronic and optical properties of titanate-based oxide superlattices