Preparation, characterization and nonlinear absorption studies of cuprous oxide nanoclusters, micro-cubes and micro-particles

Cuprous oxide nanoclusters, micro-cubes and micro-particles were successfully synthesized by reducing copper(II) salt with ascorbic acid in the presence of sodium hydroxide via a co-precipitation method. The X-ray diffraction and FTIR studies revealed that the formation of pure single-phase cubic. R...

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Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2012-07, Vol.14 (7), p.1-11, Article 976
Main Authors: Sekhar, H., Narayana Rao, D.
Format: Article
Language:English
Subjects:
ABSORPTION
Characterization and Evaluation of Materials
Chemistry and Materials Science
COMPOSITES
CUPROUS OXIDE
EMISSIONS
Field emission
Inorganic Chemistry
Lasers
Materials Science
MICROSTRUCTURES
Morphology
Nanocomposites
Nanomaterials
Nanoparticles
Nanostructure
Nanotechnology
Nonlinearity
Optical Devices
Optical properties
Optics
OXIDES
PARTICLES
Photonics
Physical Chemistry
Research Paper
Scanning electron microscopy
Sodium hydroxide
X-ray diffraction
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Summary:Cuprous oxide nanoclusters, micro-cubes and micro-particles were successfully synthesized by reducing copper(II) salt with ascorbic acid in the presence of sodium hydroxide via a co-precipitation method. The X-ray diffraction and FTIR studies revealed that the formation of pure single-phase cubic. Raman and EPR spectral studies show the presence of CuO in as-synthesized powders of Cu 2 O. Transmission electron microscopy and field emission scanning electron microscopy data revealed that the morphology evolves from nanoclusters to micro-cubes and micro-particles by increasing the concentration of NaOH. Linear optical measurements show absorption peak maximum shifts towards red with changing morphology from nanoclusters to micro-cubes and micro-particles. The nonlinear optical properties were studied using open aperture Z-scan technique with 532 nm 6 ns laser pulses. Samples-exhibited both saturable as well as reverse saturable absorption. Due to confinement effects (enhanced band gap), we observed enhanced nonlinear absorption coefficient (β) in the case of nanoclusters compared to their micro-cubes and micro-particles. Graphical abstract
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-012-0976-4