Silica encapsulated CdS tabular nanocomposites via a template directed agglomeration mechanism

Jun Wang, Stephen J. Sollenberger, Ying Yuan, Timothy J. Yosenick, James H. Adair

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Silica coated CdS tabular nanocomposites were synthesized through precipitation of CdS nanoparticles in octylamine/water bilayer system followed by in situ hydrolysis of tetraethoxylsilicate (TEOS) precursor. Face diameter of the nanoplatelets was in the range of 50-250 nm with a variable thickness (3 to 25 nm) dictated by octylamine content or R ratio ([water]/opctylamine]). A uniform SiO 2 outer shell of about 15 nm was observed regardless of the size of the high aspect ratio CdS nanoplatelets, which appeared to be agglomerated primarily owing to the confined bilayer template. Morphology and microstructure of the CdS/SiO 2 tabular nanocomposites were characterized using atomic force microscope (AFM) and high resolution transmission electron microscope (HRTEM). A noticeable enhancement in absorbance for the UV-vis spectra was observed due to the SiO 2 coating layer. Growth mechanism of nanocomposite platelets and potential applications associated with this anisotropic nanocomposite are discussed.

Original languageEnglish (US)
Pages (from-to)5878-5886
Number of pages9
JournalJournal of Nanoscience and Nanotechnology
Volume8
Issue number11
DOIs
StatePublished - Nov 1 2008

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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