Journal Article

PreJuSER-19278

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Origin of Buckling Phenomenon during Drying of Micrometer-Sized Colloidal Droplets

Bahadur, J. ; Sen, D. ; Mazumder, S. ; Bhattacharya, S. ; Frielinghaus, H.FZJ* ; Goerigk, G.FZJ*

2011
ACS Publ. Washington, DC

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Please use a persistent id in citations: doi:10.1021/la200827n

Abstract: 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.

Keyword(s): Polymers, Soft Nano Particles and Proteins (1st) ; Key Technologies (1st) ; Soft Condensed Matter (2nd) ; J

Note: The authors thankfully acknowledge financial support [DST (5)/AKR/P087/10-11/673] received from Department of Science and Technology, India, through the S. N. Bose National Centre for Basic Science, Kolkata, India, for neutron scattering work at JCNS, Garching, Germany.

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Contributing Institute(s):

1. Neutronenstreuung (ICS-1)
2. JCNS-FRM-II (JCNS (München) ; Jülich Centre for Neutron Science JCNS (München) ; JCNS-FRM-II)
3. Neutronenstreuung (JCNS-1)

Research Program(s):

1. BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung (P45)
2. Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) (P55)

Experiment(s):

1. KWS-1: Small angle scattering diffractometer (NL3b)
2. KWS-3: Very small angle scattering diffractometer with focusing mirror (NL3auS)

Appears in the scientific report 2011

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