Organic phase synthesis of noble metal-zinc chalcogenide core-shell nanostructures

Kumar, Prashant; Diab, Mahmud; Flomin, Kobi; Rukenstein, Pazit; Mokari, Taleb

doi:10.1016/j.jcis.2016.07.015

Cited by 6 publications

(7 citation statements)

References 39 publications

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“…Currently, a prevalent synthetic scheme for producing metal@chalcogenide semiconductor HNCs can be depicted as direct heterogeneous nucleation and growth of a chalcogenide semiconductor shell on the preformed metallic core. − ,,− Depending on the nature of the organic ligands or surfactants adhering on the surface of metallic core, such process can be accomplished both in nonaqueous and aqueous media. The nonaqueous routes primarily involve addition of suitable metal precursors (metal salts, organometallic compounds or complexes) and chalcogenide sources (elemental chalcogens, bis(trimethylsilyl)sulfide, etc.)…”

Section: Nanointerface In Metal@semiconductor Hncs With Large Lattice...mentioning

confidence: 99%

Nanointerface Chemistry: Lattice-Mismatch-Directed Synthesis and Application of Hybrid Nanocrystals

2020

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In the past decades, great strides have been made in the synthesis of hybrid nanocrystals (HNCs) consisting of two or more disparate subunits (such as metals and/or semiconductors) joined through nanointerfaces, which are intriguing due to their exceptional functionalities that cannot be achieved by single-component nanosystems. The promising and versatile applications of these HNCs are closely dependent on the structural and electronic properties of the nanointerface between subunits. This is because the compatibility of the lattice structures between subunits not only determines the synthetic accessibility and growth mechanisms of the HNCs on the thermodynamic basis but also influences their interfacial characteristics (atomic arrangement, lattice mismatch-induced strain or defects), configurations, crystallinity, and the synergistic interplay of different subunits at the nanoscale. As a result, nanointerface chemistry has attracted intense scientific endeavors worldwide and spurred the rapid development of the lattice-mismatch-directed precise synthesis. This review gives an overview of the main strategies developed for delicate design and fabrication of core–shell HNCs under different degrees of lattice mismatch (from 0.2% to larger than 50%), including epitaxial seeded growth, nanoscale cation exchange, cation exchange-facilitated nonepitaxial growth, etc. Moreover, as for the core–shell HNCs with small (<5%) or moderate lattice mismatch (∼5–20%), the significance of the lattice-strain control at the nanointerface in maneuvering their functions toward desired applications are discussed in detail. Regarding the core–shell HNCs with large lattice mismatch (>20%), the challenges in precise synthesis, the promising solutions enabled by cation exchange-facilitated nonepitaxial growth, and the enhanced applications of the resulting HNCs with strain-free nanointerface are elaborated. We conclude with a personal perspective on the significance and urgency of fully harnessing the effects of lattice mismatch to further advance the science of synthesis and application of HNCs.

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Section: Nanointerface In Metal@semiconductor Hncs With Large Lattice...mentioning

confidence: 99%

Nanointerface Chemistry: Lattice-Mismatch-Directed Synthesis and Application of Hybrid Nanocrystals

2020

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“…Review organic phase can also be used to form multi-shells as demonstrated by our group for M@ZnS@ZnSe (M ¼ Ag, Au). 258 Amongst the multi-domain HNSs, a system that was discussed previously and was explored in our group is the singletipped semiconductor nanorods, where the metallic tip acts as an electron sink, thus serving as an excellent reduction catalyst (further discussion in Section 4.2). As SC NRs with a single metal tip have benecial photocatalytic properties, and we had already shown that it is possible to deposit metal-suldes selectively (e.g., PbS, Ag 2 S and Cu 2Àx S) on a tip of Cd-chalcogenide NRs, 259 we combined these two kinds of interfaces into a single multi-component NR, which is based on a CdS (or CdSeseeded CdS, i.e., CdSe@CdS) NR with two distinct domains on opposite tips: PbS and Pt, forming a SC-SC-M system (PbS-CdS-Pt).…”

Section: Nanoscale Advancesmentioning

confidence: 99%

Metal/semiconductor interfaces in nanoscale objects: synthesis, emerging properties and applications of hybrid nanostructures

Volokh

Mokari

2020

Nanoscale Adv.

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“…The integration of anisotropic noble-metal nanoparticles and transition-metal chalcogenides or oxides into core–shell nanohybrids is at the forefront of nanoengineering because of their unique functionalities, which are rarely observed in the individual components. ,,− Numerous studies are being conducted on the fabrication of core–shell nanohybrids by the overgrowth of transition-metal chalcogenides or oxides onto as-prepared nanoparticles with morphological isotropy. ,,,,− For example, a variety of metal chalcogenides and oxides have been deposited on noble-metal nanospheres to form core–shell nanostructures. Anisotropic noble-metal nanomaterials have also been integrated into hybrid systems as cores. ,− ,− Importantly, the preparative processes for the transition-metal chalcogenides or oxides often involve relatively high temperatures and harsh reaction conditions as well as the excessive use of surfactants or polymers, − which can initiate the undesirable reshaping of the anisotropic metal cores and somewhat hinder their electrochemical applications.…”

Section: Introductionmentioning

confidence: 99%

Effective Fabrication and Electrochemical Oxygen Evolution Reaction Activity of Gold Multipod Nanoparticle Core–Cobalt Sulfide Shell Nanohybrids

Duy

Yoo

2019

ACS Appl. Nano Mater.

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Inorganic hybrid materials with anisotropic noble-metal nanoparticle cores and cagelike transition-metal chalcogenide shells are promising candidates for a wide variety of applications. Herein, we report an effective fabrication method for gold multipod nanoparticle (GMN) core–cobalt sulfide shell (GMN@Co x S y ) nanostructures. The unique cagelike morphology is successfully acquired within nanohybrids (GMN@Co x S y nanocages). The cobalt-based metal–organic frameworks can act as versatile sacrificial templates to the desired hybrid nanomaterials through solution-based etching approaches without any undesirable reshaping of GMNs, which are embedded within. Examination of the electrocatalytic oxygen evolution reaction (OER) of the prepared nanohybrids reveals that a type of GMN@Co x S y nanohybrid shows a substantially lower overpotential (η) value (345 mV) compared with those of GMNs (617 mV) and Co x S y nanomaterials (418 mV) at a current density of 10 mA cm–2. The enhanced OER performance is mainly attributed to the highly effective core–shell interfaces stemming from the unique multibranch topologies of the GMN cores as well as the optimized cobalt sulfide shells of the nanohybrids.

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Organic phase synthesis of noble metal-zinc chalcogenide core-shell nanostructures

Cited by 6 publications

References 39 publications

Nanointerface Chemistry: Lattice-Mismatch-Directed Synthesis and Application of Hybrid Nanocrystals

Nanointerface Chemistry: Lattice-Mismatch-Directed Synthesis and Application of Hybrid Nanocrystals

Metal/semiconductor interfaces in nanoscale objects: synthesis, emerging properties and applications of hybrid nanostructures

Effective Fabrication and Electrochemical Oxygen Evolution Reaction Activity of Gold Multipod Nanoparticle Core–Cobalt Sulfide Shell Nanohybrids

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