SiO2 monomer-triggered self-assembly of hybrid CdTe quantum dots
Authors:
- Yue Zhao,
- Simin Lu,
- Katarzyna Matras-Postolek,
- Ping Yang
Abstract
The self-assembly activity of quantum dots (QDs) including thioglycolic acid (TGA)-capped CdTe and hybrid SiO2-coated CdTe QDs into one- to three-dimensional (3D) nanostructures was reported using a slow growth process. SiO2 monomers from a sol-gel process and TGA play vital roles for the self-assembly. The hybrid SiO2-coated QDs were assembled into 1D nanotube, 2D nanosheets, and 3D nanoflowers by adjusting QD concentrations. It is found that the assemblies actually are CdTe@Cd-TGA-SiO2 complex hybrid nanostructures in which many well-separated CdTe QDs are uniformly distributed. Such assembly also occurred in an initial CdTe QD solution or in PBS and NaCl solutions. The assembly in the initial CdTe QD solution is accompanied by a hybrid SiO2 layer which resulted in red-shifted photoluminescence (PL) from green to yellow. Because of the domain growth of NaCl to form fractal structures through tip splitting and side branching dynamics, the hybrid SiO2-coated QDs were assembled into leaf morphology. As a result, the CdTe QDs with their in effective protection by hybrid Cd-TGA-SiO2 complex, these nanostructures show visually bright PL and retain the size-quantized properties of the QDs. These QDbased assemblies may be suitable for subsequent processing into quantum-confined materials and devices.
- Record ID
- CUTd299af3be6d24c35a9a2b2433b17d3d0
- Publication categories
- ;
- Author
- Journal series
- Chemical Engineering and Processing : Process Intensification, ISSN 0255-2701, e-ISSN 1873-3204
- Issue year
- 2017
- Vol
- 122
- Pages
- 357-364
- Other elements of collation
- fot.; tab.; wykr.; Bibliografia (na s.) - 364; Bibliografia (liczba pozycji) - 31; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 122
- Keywords in English
- QDs, SiO2, hybrid, assembly, CdTe
- DOI
- DOI:10.1016/j.cep.2017.02.009 Opening in a new tab
- URL
- http://www.sciencedirect.com/science/article/pii/S0255270116303956 Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 30
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTd299af3be6d24c35a9a2b2433b17d3d0/
- URN
urn:pkr-prod:CUTd299af3be6d24c35a9a2b2433b17d3d0
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.