Planet-satellite nanostructures from inorganic nanoparticles: from synthesis to emerging application
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Prospective Article
Planet–satellite nanostructures from inorganic nanoparticles: from synthesis to emerging applications† Christian Rossner and Andreas Fery Polymere, D-01069 Dresden, Germany
, Leibniz-Institut für Polymerforschung Dresden e.V., Institut für Physikalische Chemie und Physik der
Address all correspondence to Christian Rossner at [email protected] (Received 31 October 2019; accepted 10 December 2019)
Abstract Planet–satellite-type supracolloidal clusters represent a comparably young class of nanomaterials, which are unique with regard to structural order. In this prospective article, different approaches for their synthesis are discussed and compared. These synthetic methods enable the engineering of supracolloidal structural and adaptive properties, which in turn enables different emerging applications, such as in sensing and catalysis. These possibilities are explored on the basis of selected recent examples. A perspective about possible future developments is given at the end of this article.
Introduction The formation of supracolloidal clusters from inorganic nanoparticle building blocks represents a vibrant and challenging area of materials science.[1] This research direction is mostly motivated by the achievable nanoparticle assembly properties and the possible engineering of these properties.[2] Planet–satellite nanostructures which are the focus of this article represent a particular supracolloidal architecture in which (typically smaller) satellite nanoparticles surround a central (typically larger) planet nanoparticle. This generic building scheme permits the combination of distinct building units into a single, hierarchical nanoparticle arrangement structure: plasmonic, excitonic, and magnetic nanoparticles, and combinations thereof may be joined into such planet–satellite clusters. Oftentimes, such an approach not merely leads to an additive combination of the properties of the constituent nanoparticles, but new collective properties emerge as a result of interparticle interactions. These interparticle interactions may be manipulated in a directed manner by controlling the internal structure of planet–satellite nanostructures. Therefore, the targeted fabrication planet–satellite nanostructures may yield well-defined nanoparticle clusters with structural fidelity and tailored properties. By virtue of this possibility, specific applications of these unique nanostructures, such as in e.g. plasmonics, surfaceenhanced spectroscopies, sensing, and photocatalysis, have already been suggested and explored. In this prospective article, we categorize and summarize existing preparative methods for the fabrication of planet–satellite nanostructures (Preparative Approaches Toward Planet–Satellite
† Dedicated to Michael Buback on the occasion of his 75th birthday.
Nanostructures: State of the Art). We also describe how these methods can be used to achieve structural precision as well as additional functionalities. We then show selected examples of specific emerging properties that may be obtained from
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