Giving directions: Microspheres are decorated with a defined number of Au nanodots by using O2-plasma-etched colloidal crystals as masks for the deposition of Au vapor (see picture). The Au nanodots deposited on the spheres might be considered as nanoscale analogues of sp-hybridized atomic orbitals, which may be used to spatially direct the association of spheres to generate hierarchical “supraparticles”.
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Zhang et al. (2005) studied this question.
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