Publications by authors named "Paulami Bose"
Article Synopsis
- This research explores the creation of bimetallic nanostructures by combining atomically precise gold nanoclusters with silver nanoparticles through a simple one-pot reaction.
- * The method involves varying the reaction environment (using toluene or dichloromethane) to achieve different mesostructures, such as micron-sized cuboidal crystals or randomly packed nanoparticles.
- * Using a variety of techniques, the study uncovers how these nanostructures form and suggests their potential for applications in advanced materials due to their unique optical properties.
Article Synopsis
- - Nanoclusters (NCs) are ultrasmall noble metal nanoparticles that exhibit unique molecule-like properties and have significant implications in materials science due to their precise structure-property relationships.
- - The review covers the historical evolution of monolayer-protected noble metal nanoclusters, detailing their diverse chemical reactions, including ligand exchange and transformations with other chemical species.
- - Finally, it discusses how these nanoclusters can interact with each other in solution, leading to the formation of hierarchical assemblies and composite materials, while highlighting future research possibilities in this field.
Conversion of polydisperse nanoparticles to their monodisperse analogues and formation of organized superstructures using them involve post synthetic modifications, and the process is generally slow. We show that ambient electrospray of preformed polydisperse nanoparticles makes them monodisperse and the product nanoparticles self-assemble spontaneously to form organized films, all within seconds. This phenomenon has been demonstrated with thiol-protected polydisperse silver nanoparticles of 15 ± 10 nm diameter.
View Article and Find Full Text PDFReactions between atomically precise noble metal nanoclusters (NCs) have been studied widely in the recent past, but such processes between NCs and plasmonic nanoparticles (NPs) have not been explored earlier. For the first time, we demonstrate spontaneous reactions between an atomically precise NC, Au25(PET)18 (PET = 2-phenylethanethiol), and polydispersed silver NPs with an average diameter of 4 nm and protected with PET, resulting in alloy NPs under ambient conditions. These reactions were specific to the nature of the protecting ligands as no reaction was observed between the Au25(SBB)18 NC (SBB = 4-(tert-butyl)benzyl mercaptan) and the very same silver NPs.
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