Dramatically Enhanced Photoresponse of Reduced Graphene Oxide with Linker-Free Anchored CdSe Nanoparticles

Abstract

A linker-free connected reduced graphene oxide/CdSe nanoparticle (R-GO/CdSe NP) nanocomposite was produced by directly anchoring CdSe NPs onto R-GO. The morphological and structural characterizations evidence that the single-crystal CdSe NPs with the size of a few tens of nanometers can be efficiently decorated on the R-GO. The photoresponse of this nanocomposite is drastically enhanced compared with that of the pure CdSe NPs, the bare R-GO, and the physically mixed R-GO/CdSe NPs, while the photoluminescence of the CdSe NPs in the composite is much quenched, indicating that the photoinduced carriers generated from the CdSe NPs can be transferred to the R-GO effectively and separately. This ability makes the R-GO/CdSe NP nanocomposite a great promise for wide potential applications in optoelectronics.

Fluorescence quenching in graphene: A fundamental ruler and evidence for transverse plasmons

“…This mechanism is expected to dominate over competing charge-transfer processes except, perhaps, in near contact situations. 22,23 Our motivation stems from the seemingly paradoxical coexistence in graphene of very strong fluorescence quenching and nominally weak coupling to the electromagnetic field, as judged from the absorption results.…”

Graphene and derivatives – Synthesis techniques, properties and their energy applications

“…This technique is beneficial in preventing the aggregation of graphene layers [93]. The electrical properties such as conductivity is slightly higher than the rGO obtained through reduction using hydrazine [94].…”

Reduced graphene oxide and inorganic nanoparticles composites – synthesis and characterization

“…Numerous metals, chalcogenides and metal oxides have been deposited on graphene platform, e.g. Au 41 . Herein, we report a facile methods of obtaining graphene -based nanocomposites with well -dispersed inorganic nanoparticles such as palladium, platinum, zirconia and manganium dioxide of various sizes and shapes.…”