Origin of Buckling Phenomenon during Drying of Micrometer-Sized Colloidal Droplets

被引：84
作者：
Bahadur, J. [1 ]
Sen, D. [1 ]
Mazumder, S. [1 ]
Bhattacharya, S. [2 ]
Frieinghaus, H. [3 ]
Goerigk, G. [3 ]
机构：
[1] Bhabha Atom Res Ctr, Div Solid State Phys, Bombay 400085, Maharashtra, India
[2] Bhabha Atom Res Ctr, Tech Phys Div, Bombay 400085, Maharashtra, India
[3] FRM II, Julich Ctr Neutron Sci, D-85747 Garching, Germany
来源：
LANGMUIR | 2011年 / 27卷 / 13期
关键词：
EMULSION DROPLETS; LATEX-PARTICLES; SURFACE-TENSION; SPRAY; EVAPORATION; SCATTERING; NANOPARTICLES; TEMPERATURE; INSTABILITY; MORPHOLOGY;
D O I：
10.1021/la200827n
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The origin of the buckling of micrometer-sized colloidal droplets during evaporation-induced self-assembly (EISA) has been elucidated using electron microscopy and small-angle neutron scattering. Doughnut-like assembled grains with varying aspect ratios are formed during EISA at different physicochemical conditions. It has been revealed that this phenomenon is better explained by an existing hypothesis based on the formation of a viscoelastic shell of nanoparticles during drying than by other existing hypotheses based on the inertial instability of the initial droplets and hydrodynamic instability due to thermocapillary forces. This conclusion was further supported by the arrest of buckling through modification of the colloidal interaction in the initial dispersion.
引用
收藏
页码：8404 / 8414
页数：11
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