TITLE:
Synthesis of ZnS, CdS and Core-Shell Mixed CdS/ZnS, ZnS/CdS Nanocrystals in Tapioca Starch Matrix
AUTHORS:
Karen Khachatryan, Gohar Khachatryan, Maciej Fiedorowicz
KEYWORDS:
Bilayered Quantum Dots, Luminescent Biocomposites, Quantum Dots, Tapioca Starch
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.3 No.11,
November
20,
2015
ABSTRACT: Gel of tapioca starch (TS) is a suitable matrix for the formation of ZnS, CdS and core-shell ZnS/CdS as well as CdS/ZnS quantum dots (QDs). These QDs reside in the matrix as non-agglomerating 3 - 10 nm nanocrystals. It is demonstrated that amylopectin is responsible for the QDs formation rather than amylose. Combination of ZnS with CdS in the core-shell QDs results in the increase in the intensity of emission without any shift of its wavelength.