Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 220, Issue -, Pages 22-29Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mseb.2017.03.004
Keywords
Photoconductivity; Optoelectronic sensors; Nonlinear optics; Metal/carbon nanohybrids
Funding
- Consejo Nacional de Ciencia y Tecnologia [CB-2015-251201]
- Institute Politecnico Nacional, Universidad Iberoamericana
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Within this work was explored the influence of nickel oxide decoration on the photoconductive effects exhibited by multiwall carbon nanotubes. Samples in thin film form were prepared by a chemical vapor deposition method. Experiments for evaluating the photo-response of the nanomaterials at 532 nanometers wavelength were undertaken. A contrasting behavior in the photoelectrical characteristics of the decorated nanostructures was analyzed. The decoration technique allowed us to control a decrease in photoconduction of the sample from approximately 100 mu mhos/cm to -600 mu mhos/cm. Two-wave mixing experiments confirmed an enhancement in nanosecond nonlinearities derived by nickel oxide contributions. It was considered that metallic nanoparticles present a strong responsibility for the evolution of the optoelectronic phenomena in metal/carbon nanohybrids. Impedance spectroscopy explorations indicated that a capacitive behavior correspond to the samples. A potential development of high-sensitive Wheatstone bridge sensors based on the optoelectrical performance of the studied samples was proposed. (C) 2017 Elsevier B.V. All rights reserved.
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