Three Dimensional Hierarchy Structures from Self-Assembly of Quantum Dots

Authors: Yao, Wei-Guo; Yang, Rui-Zhu; Zhang, Xin-Miao; Sun, Yun-Lu; Meng, Xiang; Yu, Yong-Sen; Dong, Wen-Fei

Source: Journal of Nanoscience and Nanotechnology, Volume 11, Number 2, February 2011 , pp. 1297-1302(6)

Publisher: American Scientific Publishers

Buy & download fulltext article:

Price: $113.00 plus tax (Refund Policy)

Abstract:

We have reported first example of 3D hierarchy structure from self-assembly of water-soluble QDs followed by chemical reaction control. After addition of ethylenediaminetetraacetic acid, dipotassium salt dehydrate (EDTA) into L-cysteine-stabilized CdTe QD solution, the color of solution was observed to become lighter and shallower, and finally white precipitates appeared. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) results confirm that the morphology transformation from zero dimensional (0D) QDs via two-dimensional (2D) nanoflakes to 3D microflowers occurs among those QD assemblies. Meanwhile, EDX results demonstrate that the as-formed QD-assemblies are not CdTe but CdS. The turnover of chemistry nature from CdTe to CdS after addition of EDTA is mainly due to the oxidation of Te followed by a series of chemical reactions. The photoluminescence (PL) spectroscopy and confocal laser scanning microscopy (CLSM) results reveal that such 3D hierarchy structure of CdS QDs have good optical property.

Keywords: HIERARCHY STRUCTURES; QUANTUM DOTS; SELF-ASSEMBLY; CDTE

Document Type: Short communication

DOI: http://dx.doi.org/10.1166/jnn.2011.3113

Publication date: 2011-02-01

More about this publication?

Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
Editorial Board
Information for Authors
Subscribe to this Title
Terms & Conditions
ingentaconnect is not responsible for the content or availability of external websites

Three Dimensional Hierarchy Structures from Self-Assembly of Quantum Dots

Buy & download fulltext article:

Tools

Key

Text size:

Useful pages