3D Assembly of Semiconductor and Metal Nanocrystals: Hybrid CdTe/Au Structures with Controlled Content

Lesnyak, Vladimir; Wolf, Andreas; Dubavik, Aliaksei; Borchardt, Lars; Войтехович, Сергей В.; Gaponik, Nikolai; Kaskel, Stefan; Eychmüller, Alexander

doi:10.1021/ja202068s

Cited by 115 publications

(129 citation statements)

References 36 publications

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“…For the ligand exchange procedure, the amount of ligand 1 is adjusted with respect to the stoichiometry as in Ref. [16]. It results in tetrazole-stabilized NPs with a diameter of ~ 5 nm (Figure 2a).…”

Section: Resultsmentioning

confidence: 99%

“…The synthesis was performed with slight variations according to a previous publication of our group [16]. In a typical synthesis of citrate-stabilized Au NPs 5 mL of 1 % HAuCl 4 ·3H 2 O (59.1 mg, 0.15 mmol) water solution was diluted by 450 mL of Milli-Q water.…”

Section: Synthesis Of Citrate-stabilized Au Nps and Following Ligand mentioning

confidence: 99%

“…Therefore, we adapted two different approaches using the tetrazoles 1 and 2 ( Figure 1). The first follows a ligand exchange procedure with 5-(2-mercaptoethyl)-1H-tetrazole (1) (Figure 1, left) from aqueous-synthesized, citrate-stabilized Au NPs, which refers to the recipe of Lesnyak et al [16]. The other adopts the route of Oh et al in which Au NPs are reported with diameters down to cluster sizes synthesized in the presence of disulfides [17].…”

Section: Introductionmentioning

confidence: 99%

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Tetrazole-Stabilized Gold Nanoparticles for Catalytic Applications

Guhrenz

Wolf

Adam

et al. 2016

Zeitschrift Für Physikalische Chemie

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Herein, we report on a proof-of-concept application of tetrazolestabilized Au nanoparticles (NPs) for CO oxidation. After impregnation of the support material TiO 2 with the tetrazole-stabilized Au NPs (diameter < 5 nm), a thermal heat treatment under oxygen is used to remove the tetrazole from the NP surface. The resulting surfactant-free NPs are used in the CO oxidation and show enhanced catalytic activity in comparison to the untreated samples demonstrating the potential of tetrazole-stabilized NPs for various catalytic applications.

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Section: Resultsmentioning

confidence: 99%

Section: Synthesis Of Citrate-stabilized Au Nps and Following Ligand mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tetrazole-Stabilized Gold Nanoparticles for Catalytic Applications

Guhrenz

Wolf

Adam

et al. 2016

Zeitschrift Für Physikalische Chemie

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“…[182,183] Durch den photooxidativen Ansatz haben wir CdTe/Au-Aerogele mit anpassbaren Emissionseigenschaften (Abbildung 24 A) hergestellt. Da der Gelbildungsmechanismus vor allem durch die Stabilisatoren der Nanopartikel bestimmt wird, kçnnen verschiedene Materialien bei vergleichbarer Oberflächenchemie leicht miteinander kombiniert werden.…”

Section: Gele Aus Hybridnanostrukturenunclassified

Moderne Anorganische Aerogele

et al. 2017

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Der Begriff Aerogel beschreibt im Wesentlichen eine besondere geometrische Struktur der Materie, die materialunabhängig ist und keinem speziellen Syntheseverfahren unterliegt. Grundsätzlich können daher Aerogele aus unzähligen Materialien bestehen, wodurch die Anwendungsmöglichkeiten nahezu unbegrenzt sind. Dasselbe trifft auf Nanopartikel zu. Diese werden ebenso durch ihre geometrischen Eigenschaften definiert. In den letzten Jahrzehnten standen daher nanoskalige Materialien im Fokus der Forschung, und es entwickelten sich mögliche Anwendungen in vielen naturwissenschaftlichen Bereichen. Heute ist eine Vielzahl an Metall‐, Halbleiter‐, Oxid‐ und anderen Nanopartikeln durch kolloidale Synthesen zugänglich. Dennoch ist es für eine Anwendung oft notwendig, dass diese Materialien zuvor in makroskopische Strukturen angeordnet werden. Dieser Aufsatz gibt eine ausführliche Übersicht über die Entwicklung, die die Welt der kolloidalen Nanopartikel und der Aerogele miteinander vereint. Ermöglicht wurde dies durch die kontrollierte Destabilisierung der vorab gebildeten Nanopartikel, die zu einer Anordnung der Nanopartikel zu einem dreidimensionalen, makroskopischen Netzwerk führt. Dieses revolutionäre Konzept verleiht die Möglichkeit, präzise kontrollierte Nanopartikel als Grundbausteine für makroskopische, poröse Strukturen mit einstellbaren Eigenschaften zu nutzen.

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“…12 -22 Controlled destabilization of presynthesized QD-NCs, by, for example, chemical 19 Au simultaneously quenches and enhances PL, and acts as a FRET spacer. (d) (Top) PL spectra of a close-packed CdSe QD superlattice (blue curve) and a binary NCSL of CdSe QDs and Au NCs (red curves).…”

Section: Extended Hybrid Structures By Self-assembly and In Matrixes:mentioning

confidence: 99%

When excitons and plasmons meet: Emerging function through synthesis and assembly

et al. 2015

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To meet the challenge of precise nanoscale arrangement of emitter and plasmonic nanoantenna, synthesis and assembly methods continue to evolve in accuracy and reproducibility. This article reviews some of the many strategies being developed for "soft" chemical approaches to precision integration and assembly. We also discuss investigations of the Purcell effect, emission directionality control, and near-unity collection efficiency of photons, emitter emitter coupling, and higher-order emission processes that have been most deeply explored using individual-emitter- (or several-emitter-) nanoantenna pairs fabricated using traditional lithographic methods or dynamically and controllably manipulated using scanning probe methods. Importantly, these results along with theoretical analyses inspire and motivate continued advancements in large-scale synthesis and assembly. We emphasize assembly approaches that have been used to create nanosemiconductor-nanometal hybrids and, in particular, those that have afforded specific plasmonic effects on excitonic properties. We also review direct-synthesis and chemical-linker strategies to creating discrete, though less spatially extended, semiconductor-metal interactions

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3D Assembly of Semiconductor and Metal Nanocrystals: Hybrid CdTe/Au Structures with Controlled Content

Cited by 115 publications

References 36 publications

Tetrazole-Stabilized Gold Nanoparticles for Catalytic Applications

Tetrazole-Stabilized Gold Nanoparticles for Catalytic Applications

Moderne Anorganische Aerogele

When excitons and plasmons meet: Emerging function through synthesis and assembly

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