Template-assisted synthesis of CdS nanocrystal arrays in chemically inhomogeneous pores using a vapor–solid mechanism. Issue 35 (17th March 2015)

• Record Type: Journal Article
• Authors: Grynko, Dmytro O.; Fedoryak, Alexander N.; Dimitriev, Oleg P.; Lin, Andrew; Laghumavarapu, Ramesh B.; Huffaker, Diana L.; Kratzer, Markus; Piryatinski, Yuri P.
• Is Part Of: RSC advances. Volume 5:Issue 35(2015)
• Page Start: 27496
• Page End: 27501
• Publication Date: 2015-03-17
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra01175b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Template of chemically inhomogeneous pores enables one to grow an ordered array of CdS multi-armed nanocrystals free of catalyst. Abstract : An ordered array of CdS nanocrystals was synthesized by a vapor–solid mechanism using a template of chemically inhomogeneous pores in the form of nanocavities in a thin silicon nitride layer on a SiO2 /Si wafer. The silicon oxide at the bottom of the Si3 N4 cavities served for nucleation of the CdS crystals, whereas no affinity of CdS to silicon nitride was found. Tetra- and multi-pod morphologies of the nanocrystals have been obtained. These morphologies were attributed to a competition between nucleation rates and growth of different crystallographic planes at the Si3 N4 /SiO2 and Si3 N4 /CdS interfaces, which is different from the polymorphism growth model.