Buckling-driven morphological transformation of droplets of a mixed colloidal suspension during evaporation-induced self-assembly by spray drying |
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| Authors: | D Sen J S Melo J Bahadur S Mazumder S Bhattacharya G Ghosh D Dutta and S F D’Souza |
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| Institution: | (1) Solid State Physics Division, Bhabha Atomic Research Centre, 400085 Mumbai, India;(2) Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, 400085 Mumbai, India;(3) Technical Physics and Prototype Engineering Division, Bhabha Atomic Research Centre, 400085 Mumbai, India;(4) UGC-DAE Consortium for Scientific Research, 400085 Mumbai, India;(5) Radio Chemistry Division, Bhabha Atomic Research Centre, 400085 Mumbai, India |
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| Abstract: | Morphological transformation during evaporation-induced self-assembly of a mixed colloidal suspension in micrometric droplets
has been investigated. It has been demonstrated that a buckling-driven shape transition of drying droplets of mixed colloidal
suspension takes place during evaporation-induced self-assembly. Further, it is also shown that the distortion modulations
get significantly amplified with enhancement in volume fraction of anisotropic soft colloidal component of the mixed colloids.
It has been argued that the reduction in elastic modulus of formed shell, at the boundary of a drying droplet, and the anisotropic
nature of one of the colloidal components facilitate the deformation process. Hierarchical structures of these assembled colloidal
grains have been probed using electron microscopy and scattering techniques. |
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