Journal
MATERIALS RESEARCH BULLETIN
Volume 48, Issue 10, Pages 3800-3804Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2013.05.091
Keywords
Nanostructures; Chemical synthesis; Photoelectron spectroscopy; Surface properties
Categories
Funding
- National Key Technology R&D Program of China [2012BAI23B02]
- National Natural Science Foundation of China [81071229, 81271616]
- Foundation for Innovative Research Groups of the NNSFC [61121004]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20100142110002]
- Fundamental Research Funds for the Central Universities (Hust) [2012TS016]
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Owing to the high X-ray absorption, Bi2S3 nanocrystals are widely used as CT contrast agents. Here, we prepared uniform Bi2S3 nanorods via a hot injection method using bismuth (III) chloride, sulfur and oleyl amine. The resulting nanocrystals were coated with tetraethylorthosilicate (TEOS) and 2-[methoxy(polyethyleneoxy)propyl]yrimethoxysilane (PEG-silane) for the biological utility. X-ray diffraction (XRD) and transmission electron microscopy (TEM) results showed that the Bi2S3 nanorods had an orthorhombic structure with the length of 14 nm and the diameter of 7 nm, respectively. Composite nanoparticles (0.0226 M) gave a CT number at 550 (HU), which was higher than that of the commercial available iobitridol CT contrast agent. Furthermore, cell experiments revealed that Bi2S3 composite nanoparticles had a low cytotoxicity with a concentration up to 0.01 M of Bi for 24 h. (c) 2013 Elsevier Ltd. All rights reserved.
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