In-situ monitoring of silica shell growth on PS-b-P4VP micelles as templates using DLS

Horechyy A, Nandan B, Shajkumar A, Formanek P, Paturej J, Stamm M, Fery A (2016)

Publication Type: Journal article

Publication year: 2016

Journal

Polymer Elsevier

Book Volume: 107

Pages Range: 485-491

DOI: 10.1016/j.polymer.2016.07.080

Abstract

Polystyrene-block-poly(4-vinylpyrdine) (PS-b-P4VP) block copolymer (BCP) was used as a template for the preparation of PS-b-P4VP@SiO2 core-shell particles using an acid catalyzed sol-gel process. The process of silica shell formation and development of shell morphology were studied using a combination of in-situ dynamic light scattering (DLS) and transmission electron microscopy (TEM). The results obtained reveal that shell formation and growth principally involve the following stages: (I) sol assembly around BCP micelles; (II) hydrolysis-condensation reaction accelerated by the protonated P4VP corona of BCP micelles; (III) shell densification; and (IV) shell growth. Present work provides insight into the sol-gel process which takes place in systems containing “reactive” templates, such as protonated PS-b-P4VP micelles, and discloses the mechanism and pathways of silica shell formation. We demonstrate that the whole process can be effectively monitored in-situ using conventional DLS. The results are of significant importance for fabrication of targeted core-shell nanostructures.

Involved external institutions

Leibniz-Institut für Polymerforschung Dresden e. V.

Germany (DE) Indian Institute of Technology (IIT), Delhi

India (IN)

How to cite

APA:

Horechyy, A., Nandan, B., Shajkumar, A., Formanek, P., Paturej, J., Stamm, M., & Fery, A. (2016). In-situ monitoring of silica shell growth on PS-b-P4VP micelles as templates using DLS. Polymer, 107, 485-491. https://doi.org/10.1016/j.polymer.2016.07.080

MLA:

Horechyy, Andriy, et al. "In-situ monitoring of silica shell growth on PS-b-P4VP micelles as templates using DLS." Polymer 107 (2016): 485-491.

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