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Issue 11, 2016
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The pivotal step of nanoparticle functionalization for the preparation of functional and magnetic hybrid opal films

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Abstract

The preparation of hierarchical and sophisticated particle architectures for mimicking structural colors known from nature still remains a challenge. In this study, the preparation of novel opal and double-inverse opal films based on thermally treated metallopolymer core particles with a silica shell is described. Thermal treatment leads to the formation of magnetic nanorattle-type particles. The main challenge of artificial particles is to ensure sufficient dispersibility after several synthetic steps. Especially silica particles providing surface hydroxyl groups tend to sinter at high temperatures leading to agglomeration. We present the introduction of trimethyl ethoxy silane (TMES) as an excellent functionalization reagent as the key reaction step. The necessity and success of functionalization are investigated by transmission electron microscopy (TEM) and zeta potential measurements. Importantly, solid state NMR techniques are employed to gain deeper insights into the chemical structure of the surface-attached reagent. Finally, by this convenient functionalization the preparation of elastomeric opal films and double-inverse opal films is proven successful revealing excellent optical film properties. Moreover, magnetic properties of these novel films are investigated by using magnetic force microscopy (MFM). The herein established route is expected to pave the way for the preparation of a variety of advanced and stimuli-responsive optical materials.

Graphical abstract: The pivotal step of nanoparticle functionalization for the preparation of functional and magnetic hybrid opal films

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Publication details

The article was received on 25 Dec 2015, accepted on 13 Feb 2016 and first published on 15 Feb 2016


Article type: Paper
DOI: 10.1039/C5TC04388C
Citation: J. Mater. Chem. C, 2016,4, 2187-2196
  • Open access: Creative Commons BY license
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    The pivotal step of nanoparticle functionalization for the preparation of functional and magnetic hybrid opal films

    D. Scheid, D. Stock, T. Winter, T. Gutmann, C. Dietz and M. Gallei, J. Mater. Chem. C, 2016, 4, 2187
    DOI: 10.1039/C5TC04388C

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