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Zeitschrift für Physikalische Chemie

International journal of research in physical chemistry and chemical physics

Ed. by Rademann, Klaus

12 Issues per year


IMPACT FACTOR 2016: 1.012

CiteScore 2016: 0.99

SCImago Journal Rank (SJR) 2016: 0.463
Source Normalized Impact per Paper (SNIP) 2016: 0.470

Online
ISSN
2196-7156
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Volume 229, Issue 7-8 (Aug 2015)

Issues

Formation of Anisometric Fumed Silica Supraparticles – Mechanism and Application Potential

Marcel Sperling
  • Technische Universität Berlin (TU Berlin), Institut für Chemie – Stranski Laboratorium für Physikalische und Theoretische Chemie, Straße des 17. Juni 124, D-10623 Berlin, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Orlin D. Velev
  • North Carolina State University (NCSU), Department of Chemical and Biomolecular Engineering, Partners Way 911, NC-27695-7905, Raleigh, USA
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Michael Gradzielski
  • Corresponding author
  • Technische Universität Berlin (TU Berlin), Institut für Chemie – Stranski Laboratorium für Physikalische und Theoretische Chemie, Straße des 17. Juni 124, D-10623 Berlin, Germany
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  • Other articles by this author:
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Published Online: 2015-01-15 | DOI: https://doi.org/10.1515/zpch-2014-0545

Abstract

The self-assembly of colloidal particles into well-defined structures, such as anisometric ones, has shown to be both a challenging and promising field in today's research. We report a detailed analysis of the processes of drying and the associated colloidal assembly-induced deformation of aqueous droplets containing fumed silica (FS) on a superhydrophobic surface. The use of FS as colloidal building block can lead to the formation of anisometric supraparticles by droplet deformation due to the formation of a dense silica shell at the water-air interface. We demonstrate how this can be done in a controlled way by adjusting the initial suspension's ionic strength using NaCl. An interpretation of the critical deformation point is given and we derive an empirical formula to predict the extent of anisometry depending on the initially applied salt and FS concentration. By addition of polystyrene microspheres we prove the general applicability of this method to droplets containing dispersions of various types of colloidal material, thereby forming hybrid supraparticles. This allows for introducing additional functionality to anisometric particles prepared with FS.

Keywords: Anisometric Particles; Fumed Silica; Evaporation; Self-Assembly; Droplets; Superhydrophobic Surface

About the article

Accepted: 2014-11-14

Received: 2014-06-01

Published Online: 2015-01-15

Published in Print: 2015-08-28


Citation Information: Zeitschrift für Physikalische Chemie, ISSN (Online) 2196-7156, ISSN (Print) 0942-9352, DOI: https://doi.org/10.1515/zpch-2014-0545.

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©2015 Walter de Gruyter Berlin/Boston. Copyright Clearance Center

Citing Articles

Here you can find all Crossref-listed publications in which this article is cited. If you would like to receive automatic email messages as soon as this article is cited in other publications, simply activate the “Citation Alert” on the top of this page.

[2]
Marcel Sperling, Vivian J. Spiering, Orlin D. Velev, and Michael Gradzielski
Particle & Particle Systems Characterization, 2017, Volume 34, Number 1, Page 1600176
[3]
Marcel Sperling, Periklis Papadopoulos, and Michael Gradzielski
Langmuir, 2016, Volume 32, Number 27, Page 6902
[4]
Marcel Sperling, Hyung-Ju Kim, Orlin D. Velev, and Michael Gradzielski
Advanced Materials Interfaces, 2016, Volume 3, Number 15, Page 1600095

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