Carbon-assisted morphological manipulation of CdS nanostructures and their cathodoluminescence properties

Journal Article · Sun Nov 15 00:00:00 EST 2009 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2009.08.028· OSTI ID:21372406

Meng, Zhang ^[1]; Zhai, Tianyou ^[1]; Xi, Wang ^[1]; Qing, Liao ^[1]; Yao, Jiannian ^[1]

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1. Beijing National Laboratory for Molecular Science (BNLMS), Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)

CdS nanostructures with different morphologies and sizes were successfully fabricated through a facile and effective carbon-assisted thermal evaporation method. Through simply changing the positions of silicon substrates, the temperatures and the effects of carbon in different zones were modified, and thus the morphologies of CdS nanostructures were varied from multipods to nanobrushes to nanocups. These nanostructures were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectrometry (EDS), X-ray powder diffraction (XRD) and Raman spectroscopy. Cathodoluminescence (CL) measurement shows that the as-grown CdS nanostructures display different luminescent properties. CdS multipods and nanocups show mainly green emission centered at {approx}496 nm. However, nanobrushes exhibit predominant red emission band peaking at {approx}711 nm. These interesting results show that carbon not only affected the growth process but also influenced the properties of CdS nanostructures. - Graphical abstract: A facile and effective carbon-assisted thermal evaporation method is explored to synthesize CdS multipods, nanobrushes and nanocups. These CdS nanostructures display very different optical properties.

• OSTI ID: 21372406
• Journal Information: Journal of Solid State Chemistry, Vol. 182, Issue 11; Other Information: DOI: 10.1016/j.jssc.2009.08.028; PII: S0022-4596(09)00413-7; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

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77 NANOSCIENCE AND NANOTECHNOLOGY
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CATHODOLUMINESCENCE
EVAPORATION
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SCANNING ELECTRON MICROSCOPY
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY
CADMIUM COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
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ELECTRON MICROSCOPY
ELEMENTS
EMISSION
INORGANIC PHOSPHORS
LUMINESCENCE
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NONMETALS
PHASE TRANSFORMATIONS
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PHOTON EMISSION
SCATTERING
SPECTROSCOPY
SULFIDES
SULFUR COMPOUNDS