TY  - JOUR
AU  - Ruiz-Franco, J.
AU  - Marakis, J.
AU  - Gnan, N.
AU  - Kohlbrecher, J.
AU  - Gauthier, M.
AU  - Lettinga, M.P.
AU  - Vlassopoulos, D.
AU  - Zaccarelli, E.
TI  - Crystal-to-Crystal Transition of Ultrasoft Colloids under Shear
JO  - Physical review letters
VL  - 120
IS  - 7
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2018-02239
SP  - 078003
PY  - 2018
AB  - Ultrasoft colloids typically do not spontaneously crystallize, but rather vitrify, at high concentrations. Combining in situ rheo–small-angle-neutron-scattering experiments and numerical simulations we show that shear facilitates crystallization of colloidal star polymers in the vicinity of their glass transition. With increasing shear rate well beyond rheological yielding, a transition is found from an initial bcc-dominated structure to an fcc-dominated one. This crystal-to-crystal transition is not accompanied by intermediate melting but occurs via a sudden reorganization of the crystal structure. Our results provide a new avenue to tailor colloidal crystallization and the crystal-to-crystal transition at the molecular level by coupling softness and shear.
LB  - PUB:(DE-HGF)16
C6  - pmid:29542977
UR  - <Go to ISI:>//WOS:000460781500001
DO  - DOI:10.1103/PhysRevLett.120.078003
UR  - https://juser.fz-juelich.de/record/844897
ER  -