Sol–Gel Methods for the Assembly of Metal Chalcogenide Quantum Dots

Abstract

Sol-gel chemistry represents a powerful method for assembling metal chalcogenide quantum dots into 3D connected architectures without the presence of intervening ligands to moderate particle-particle interactions. Wet gels prepared by the oxidative loss of thiolate surface groups from chalcogenide nanoparticles can be converted to xerogels (low porosity) or aerogels (high porosity), and the quantum-confinement effects in these low-dimensional networks decrease with increasing density of the network. In this Account, we describe the application of sol-gel chemistry to the formation of CdSe architectures and discuss how surface modification can lead to highly luminous monoliths, concluding with the prospects of these unique materials for applications in sensing and photovoltaics.

Uncommon Coordination Behaviour of P(S) and P(Se) Units when Bonded to Carboranyl Clusters: Experimental and Computational Studies on the Oxidation of Carboranyl Phosphine Ligands

“…, Se; R = organic group) are useful 1) as starting materials for metal chalcogenide nanoparticles, [5] 2) as synergist agents of CMPO or DTPA to improve An III / Ln III separation in nuclear waste remediation, [6] 3) for preparing molecular complexes with P-chalcogen ligands [7] and 4) in chalcogen-transfer reactions.…”

Hydrogele und Aerogele aus Edelmetallnanopartikeln

“…[33] Die Synthese von kolloidalen Metallnanopartikeln sowie die Einstellung ihrer Größe, Form und Zusammensetzung ist heutzutage ein umfassend entwickeltes Forschungsgebiet. [34][35][36][37][38][39] Für die Gelbildung werden zahlreiche Methoden zur langsamen Destabilisierung, die bereits zuvor bei Gelen auf Basis von Metallchalkogenidpartikeln Anwendung fanden, [9,13] systematisch für wässrige kolloidale Lösungen von Gold-, Silber-und Platin-Nanopartikeln untersucht. Überkritische Trocknung [2,40] der Hydrogele unter Verwendung von flüssigem CO 2 liefert letztendlich die Aerogele.…”

Carbon aerogel evolution: Allotrope, graphene-inspired, and 3D-printed aerogels

“…These 2D materials, like graphene, have generated a lot of interest due to their exceptional properties for applications such as catalysis, energy storage, sensors, and electronics. [125][126][127] Although there are a number of reports on chalcogels, [128][129][130][131][132] examples of pure TMD aerogels remain limited. 133 In 2015, Worsley et al 18 reported a fairly straightforward method for MoS 2 and WS 2 aerogels.…”