Journal
MATERIALS LETTERS
Volume 65, Issue 11, Pages 1699-1702Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2011.03.016
Keywords
Nanoparticles; Semiconductors; Crystal growth; Cuprous iodide; Solution process
Funding
- National Natural Science Foundation of China [21001081, 21043004, 20771083]
- Excellent Introduced Talents of Tianjin Normal University [5RL071]
- Doctoral Foundation of Tianjin Normal University [52X09007]
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Single-crystal cuprous iodide semiconductor nanospheres were fabricated via a mild low-temperature solution route by using polyvinyl pyrrolidone as capping agent and the mixture of water and polyethylene glycol 400 as solvent. The structure, morphology, and properties of the products were characterized by powder X-ray diffraction, transmission electron microscopy, scanning electron microscopy, thermal gravimetry and photoluminescence spectrometry. The results showed that the products were CuI nanospheres of ca. 280-650 nm in diameter and were composed of quasi-trigonal particles of ca. 20-40 nm. The phase transformation temperature and the melting point of the products decreased by ca. 12 and 8 degrees C compared with the bulk CuI. The possible formation mechanism was discussed on the basis of experimental results. (C) 2011 Elsevier B.V. All rights reserved.
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