Non–close-packed nanoparticle arrays

Abstract

Nanomaterials![Figure][1] Etching out one class of nanoparticles yields an open nanoarray. ILLUSTRATION: ELLA MARUSHCHENKO Films of colloidal nanoparticles usually form dense, close-packed lattices. If binary lattices could be made and one component removed, then a more open array could form, as long as the remaining nanoparticles could be stabilized. Udayabhaskararao et al. formed binary superlattices of gold and magnetite nanoparticles at an air-liquid interface that could then be transferred to carbon-coated surfaces (see the Perspective by Kotov). Selective etching of either of the nanoparticles created non–close-packed arrays with vacancies stabilized by the carbon surface. Science , this issue p. [514][2]; see also p. [448][3] [1]: pending:yes [2]: /lookup/doi/10.1126/science.aan6046 [3]: /lookup/volpage/358/448?iss=6362