Self-assembly of TGA-capped CdTe nanocrystals into three-dimensional luminescent nanostructures

Chen, Hongjun, Lesnyak, Vladimir, Bigall, Nadja C., Gaponik, Nikolai and Eychmueller, Alexander (2010) Self-assembly of TGA-capped CdTe nanocrystals into three-dimensional luminescent nanostructures. Chemistry of Materials, 22 7: 2309-2314. doi:10.1021/cm9032572

Author Chen, Hongjun
Lesnyak, Vladimir
Bigall, Nadja C.
Gaponik, Nikolai
Eychmueller, Alexander
Title Self-assembly of TGA-capped CdTe nanocrystals into three-dimensional luminescent nanostructures
Journal name Chemistry of Materials   Check publisher's open access policy
ISSN 0897-4756
Publication date 2010-04-13
Sub-type Article (original research)
DOI 10.1021/cm9032572
Open Access Status
Volume 22
Issue 7
Start page 2309
End page 2314
Total pages 6
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Formatted abstract
In this paper, we report on a convenient and quick self-assembly of thioglycolic acid (TGA)-capped CdTe nanocrystals (NCs) into three-dimensional (3D) nanostructures in solution, in which large-scale nanowires are found as building blocks. The wet 3D nanostructures can be further dried by critical CO2 to obtain solids with a volume of about 1 cm3 and a density of about 1/2500th of bulk CdTe. By SEM, EDS, and HRTEM characterization, it is found that the nanowires actually are CdTe@Cd-TGA complex hybrid nanostructures in which many well-separated CdTe NCs are uniformly distributed. The hybrid nanowires can reach several micrometers in length and 25 - 8 nm in width. As a result of the CdTe NCs with their integrity and effective protection by the Cd-TGA complex, the hybrid nanowires and 3D nanostructures still show visually bright luminescence and retain the size-quantized properties of the CdTe NCs. This new kind of QD-based nanostructures may be suitable for subsequent processing into quantum-confined superstructures, materials and devices.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
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