Colloidal heterostructured nanocrystals: Synthesis and growth mechanisms

Interplay of chemical structure and magnetic order coupling at the interface between Cr2O3 and Fe3O4 in hybrid nanocomposites

“…4 The interfaces established in this way offer a combination of effects depending on the local chemical composition, the crystallographic orientation, the type of coupling, and/or the 3D connectivity pattern between the transition metal oxide nanocrystals. As a result, the heterostructures allow therefore enhanced and/or diversified capabilities, 5 depending on the lattice, electronic and orbital reconstruction at the interfaces. 6 For that reason, the complete characterization of hybrid nanocomposites requires a combination of techniques such that the contributions from individual components and the density of the interfaces established can be uniquely described.…”

Preparation of Novel Complex Nano-Structured Gold Catalyst Au@T<sub>i</sub>O<sub>2</sub>/MCM-22, Characterization and Remarkably Catalytic Performance for Cyclohexane Oxidation

“…Metal-oxide hybrid nanoparticles are quite interesting and popular among novel nanostructures [1] [2]. The materials systems are expanded from single-component nanoparticles to hybrid multicomponent heteronanostructures which integrate discrete domains of different compositions within one hybrid nanostructured entity [3] [4] [5]. Metal-oxide hybrid nanoparticles represent an important class of multicomponent nano-systems that may exhibit not only a combination of properties from the individual components but also further enhanced property and even new synergistic properties which arise essentially from the nanoscale interactions between the disparate metal and oxide components [6].…”

Colloidal Magnetic Heterostructured Nanocrystals with Asymmetric Topologies: Seeded-Growth Synthetic Routes and Formation Mechanisms

“…In general, HNCs may group inorganic Buonsanti et al, 2007;Jun et al, 2007;Casavola et al, 2008;Carbone and Cozzoli, 2010;Talapin et al, 2010;de Mello Donegà, 2011;Liu et al, 2011;Buck and Schaak, 2013;Sitt et al, 2013;Banin et al, 2014;Melinon et al, 2014;Purbia and Paria, 2015;Qi et al, 2015) and/or organic materials, such as polymers (Lattuada and Hatton, 2011;Liu et al, 2011;Zhang et al, 2012;He et al, 2013;Kaewsaneha et al, 2013;Pang et al, 2014;Purbia and Paria, 2015) or some carbon allotropes Liu et al, 2011;Purbia and Paria, 2015;Yan et al, 2015b). As far as the attached domains grow crystalline, the relevant heterojunctions can develop epitaxially, allowing the concerned lattices to hold precise, yet synthetically adjustable, crystallographic, and spatial relationships relative to one other (Carbone and Cozzoli, 2010;Shim and McDaniel, 2010). Owing to these exclusive interface structure characteristics that guarantee stable inter-domain connectivity, HNCs can be safely processed in liquid media and relocated to different environments after the synthesis while maintaining their native configuration intact.…”

“…The most easily controllable prototypes of HNCs delivered so far can be roughly classified into two main categories: (i) core@shell architectures, in which the component domains are arranged in concentric or eccentric onionlike topologies, where only the outer shell material, which protects the inner core, is exposed to the external environment Buonsanti et al, 2007;Jun et al, 2007;Casavola et al, 2008;Carbone and Cozzoli, 2010;de Mello Donegà, 2011;Liu et al, 2011;Zhang et al, 2012;Kaewsaneha et al, 2013;Sitt et al, 2013;Banin et al, 2014;Melinon et al, 2014;Purbia and Paria, 2015;Qi et al, 2015) [in the yolk/shell variant, a core-or shellconformal void space may also intervene in the interior (Casavola et al, 2008;Carbone and Cozzoli, 2010;Liu et al, 2011;Purbia and Paria, 2015)]; (ii) non-core@shell segregated heteroclusters, in which the constituent sections are asymmetrically arranged in space through small heterojunctions, such that a substantial fraction of the surface of each material module remains accessible Buonsanti et al, 2007;Jun et al, 2007;Casavola et al, 2008;Peng et al, 2009;Carbone and Cozzoli, 2010;de Mello Donegà, 2011;Lattuada and Hatton, 2011;Buck and Schaak, 2013;Kaewsaneha et al, 2013;Sitt et al, 2013;Banin et al, 2014;Melinon et al, 2014;Pang et al, 2014;Yan et al, 2015b). The latter cluster-type heterostructures, which encompass two-component Janus-type HNCs Casavola et al, 2008;C...…”

“…The latter cluster-type heterostructures, which encompass two-component Janus-type HNCs Casavola et al, 2008;Carbone and Cozzoli, 2010;Lattuada and Hatton, 2011;He et al, 2013;Kaewsaneha et al, 2013;Pang et al, 2014) to multicomponent hetero-oligomer HNCs Casavola et al, 2008;Peng et al, 2009;Carbone and Cozzoli, 2010;Buck and Schaak, 2013;Yan et al, 2015b), are especially significant in that they can be regarded as "nanocrystal molecules, " inorganic analogues of organic molecules equipped with a programmable number of functional moieties. Thus, in a sense, rational design and programmable fabrication of asymmetric non-core@shell HNCs conceptually mimic the total-synthesis approach used by organic chemists to construct large molecules.…”