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One-pot synthesis of an inorganic heterostructure: uniform occlusion of magnetite nanoparticles within calcite single crystals

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Chemical Science Vol -4

Chemical Science Vol -3

Chemical Science Vol -2

Chemical Science Vol -1

One-pot synthesis of an inorganic heterostructure: uniform occlusion of magnetite nanoparticles within calcite single crystals

Content Provider	Royal Society of Chemistry (RSC)
Author	Kim, Yi-Yeoun Armes, Steven P. Semsarilar, Mona Fielding, Lee A. Meldrum, Fiona C. Kulak, Alexander N. Ihli, Johannes Cespedes, Oscar
Copyright Year	2014
Abstract	A facile one-pot method is described for the formation of novel heterostructures in which inorganic nanoparticles are homogeneously distributed throughout an inorganic single crystal matrix. Our strategy uses nanoparticles functionalised with a poly(sodium 4-styrenesulphonate)-poly(methacrylic acid) [PNaStS-PMAA] diblock copolymer as a soluble crystal growth additive. This copolymer plays a number of essential roles. The PMAA anchor block is physically adsorbed onto the inorganic nanoparticles, while the PNaStS block acts as an electrosteric stabiliser and ensures that the nanoparticles retain their colloidal stability in the crystal growth solution. In addition, this strong acid block promotes binding to both the nanoparticles and the host crystal, which controls nanoparticle incorporation within the host crystal lattice. We show that this approach can be used to achieve encapsulation loadings of at least 12 wt% copolymer-coated magnetite particles within calcite single crystals. Transmission electron microscopy shows that these nanoparticles are uniformly distributed throughout the calcite, and that the crystal lattice retains its continuity around the embedded magnetite particles. Characterisation of these calcite/magnetite nanocomposites confirmed their magnetic properties. This new experimental approach is expected to be quite general, such that a small family of block copolymers could be used to drive the incorporation of a wide range of pre-prepared nanoparticles into host crystals, giving intimate mixing of phases with contrasting properties, while limiting nanoparticle aggregation and migration.
Starting Page	738
Ending Page	743
Page Count	6
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	5
Issue Number	2
Journal	Chemical Science
DOI	10.1039/c3sc52615a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Acid Magnetite Transmission electron microscopy Sodium Nanoparticle Poly(methacrylic acid) PMAA Copolymer Calcite Composite material Crystal structure
Content Type	Text
Resource Type	Article
Subject	Chemistry

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