title: Selective assembly of Au-Fe3O4nanoparticle hetero-dimers.
abstract: Hetero-dimeric magnetic nanoparticles of the type Au-Fe3O4have been synthesised from separately prepared, differently shaped (spheres and cubes), monodisperse nanoparticles. This synthesis was achieved by the following steps: (a) Mono-functionalising each type of nanoparticles with aldehyde functional groups through a solid support approach, where nanoparticle decorated silica nanoparticles were fabricated as an intermediate step; (b) Derivatising the functional faces with complementary functionalities (e.g. amines and carboxylic acids); (c) Dimerising the two types of particles via amide bond formation. The resulting hetero-dimers were characterised by high-resolution TEM, Fourier transform IR spectroscopy and other appropriate methods. Graphical AbstractNano-LEGO: Assembling two types of separately prepared nanoparticles into a hetero-dimer is the first step towards complex nano-architectures. This study shows a solid support approach to combine a gold and a magnetite nanocrystal.
authors.affiliation: ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Ian Wark Research Institute, University of South Australia, Adelaide, SA 5095 Australia.
authors.forename: Melissa R
authors.initials: MR
authors.lastname: Dewi
authors.affiliation: ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Ian Wark Research Institute, University of South Australia, Adelaide, SA 5095 Australia.
authors.forename: Geoffry
authors.initials: G
authors.lastname: Laufersky
authors.affiliation: ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Ian Wark Research Institute, University of South Australia, Adelaide, SA 5095 Australia.
authors.forename: Thomas
authors.initials: T
authors.lastname: Nann
keywords: Dimers; Gold nanoparticles; Hetero-dimers; Iron oxide nanoparticles; Mono-functionalisation