Self-Assembly of TGA-Capped CdTe Nanocrystals into Three-Dimensional Luminescent Nanostructures

被引：55
作者：
Chen, Hongjun [1 ]
Lesnyak, Vladimir [1 ]
Bigall, Nadja C. [2 ]
Gaponik, Nikolai [1 ]
Eychmueller, Alexander [1 ]
机构：
[1] Tech Univ Dresden, D-01062 Dresden, Germany
[2] Ist Italiano Tecnol, I-16163 Genoa, Italy
来源：
CHEMISTRY OF MATERIALS | 2010年 / 22卷 / 07期
关键词：
NOBLE-METAL NANOPARTICLES; LIGHT-EMITTING-DIODES; AIR-WATER-INTERFACE; QUANTUM DOTS; AQUEOUS SYNTHESIS; ENERGY-TRANSFER; NANOWIRES; TRANSPORT; AEROGELS; NETWORKS;
D O I：
10.1021/cm9032572
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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 CO(2) to obtain solids with a volume of about 1 cm(3) 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.
引用
收藏
页码：2309 / 2314
页数：6
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