Seeding of Au on CdSe/CdS nanoplates using Langmuir–Blodgett technique. Issue 18 (4th February 2016)

• Record Type: Journal Article
• Authors: Das, Subhasis; Satpati, Biswarup; Chauhan, Himani; Deka, Sasanka; Ghosalya, Manoj Kumar; Gopinath, Chinnakonda S.; Bala, Tanushree
• Is Part Of: RSC advances. Volume 6:Issue 18(2016)
• Page Start: 14658
• Page End: 14665
• Publication Date: 2016-02-04
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra26018c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Oleyl amine capped CdSe/CdS nanoplates formed a stable Langmuir monolayer over an aqueous HAuCl4 subphase. Au seeds grew on the edges and the flat surface of the nanoplates to form continuous Au shell-like structures on the semiconductor nanoplates. Abstract : Oleyl amine capped CdSe/CdS nanoplates were synthesized by hot injection technique which formed a stable monolayer over both a water subphase and an aqueous HAuCl4 subphase using a Langmuir–Blodgett trough. Au islands were generated at the edge as well as on one specific surface of the flat nanoplates by exploiting the reducing capacity of oleyl amine to form Au nanoseeds from AuCl4 − ions. The initial Au nanoseeds changed to a shell surrounding these nanoplates on prolonged exposure to the subphase containing the Au precursor. Monolayer of the hybrid structures was deposited onto suitable substrates for characterization by a number of different techniques and to study the photocatalytic activity. The same substrate with the monolayers could be re-used in several cycles of photocatalysis.