Synthesis and Characterization of ZnO/Graphene Nanostructures for Electronics and Photocatalysis

Synthesis and Characterization of ZnO/Graphene Nanostructures for Electronics and Photocatalysis
Author: Seyed Ebrahim Chalangar
Publisher: Linköping University Electronic Press
Total Pages: 132
Release: 2021-04-08
Genre:
ISBN: 9179296823


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Recent rapid development of electronics and electro-optical devices demands affordable and reliable materials with enhanced performance. Forming nanocomposites of already well-known materials is one possible route towards novel functional materials with desirable synergistic enhanced properties. Incompatible chemical properties, mismatched crystal structures and weak bonding interactions between the substances, however, often limit the number of possible nanocomposites. Moreover, using an inexpensive, facile, large-area and flexible fabrication technique is crucial to employ the new composites in industrially viable applications. This thesis focuses on the synthesis and characterization of different zinc oxide/graphene (ZnO/GR) nanocomposites, well suited for optoelectronics and photocatalysis applications. Two different approaches of i) substrate-free random synthesis, and ii) template-assisted selective area synthesis were studied in detail. In the first approach, ZnO nanoparticles/rods were grown on GR. The obtained nanocomposites were investigated for better GR dispersity, electrical conductivity and optical properties. Besides, by adding silver iodide to the nanocomposite, an enhanced plasmonic solar-driven photocatalyst was synthesized and analyzed. In the second approach, arrays of single, vertically aligned ZnO nanorods were synthesized using a colloidal lithography-patterned sol-gel ZnO seed layer. Our demonstrated nanofabrication technique with simple, substrate independent, and large wafer-scale area compatibility improved the alignment and surface density of ZnO nanorods over large selective growth areas. Eventually, we found a novel method to further enhance the vertical alignment of the ZnO nanorods by introducing a GR buffer layer between the Si substrate and the ZnO seed layer, together with the mentioned patterning technique. The synthesized nanocomposites were analyzed using a large variety of experimental techniques including electron microscopy, photoelectron spectroscopy, x-ray diffraction, photoluminescence and cathodoluminescence spectroscopy for in-depth studies of their morphology, chemical and optical properties. Our findings show that the designed ZnO/GR nanocomposites with vertically aligned ZnO nanorods of high crystalline quality, synthesized with the developed low-cost nanofabrication technique, can lead to novel devices offering higher performance at a significantly lower fabrication cost.


Synthesis and Characterization of ZnO/Graphene Nanostructures for Electronics and Photocatalysis
Language: en
Pages: 132
Authors: Seyed Ebrahim Chalangar
Categories:
Type: BOOK - Published: 2021-04-08 - Publisher: Linköping University Electronic Press

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Recent rapid development of electronics and electro-optical devices demands affordable and reliable materials with enhanced performance. Forming nanocomposites
Synthesis and Characterization of Some Nanostructured Materials for Visible Light-driven Photo Processes
Language: en
Pages: 107
Authors: Rania Elhadi Adam
Categories:
Type: BOOK - Published: 2020-03-18 - Publisher: Linköping University Electronic Press

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Nanostructured materials for visible light driven photo-processes such as photodegradation of organic pollutants and photoelectrochemical (PEC) water oxidation
Graphene-based nanocomposites for electronics and photocatalysis
Language: en
Pages: 55
Authors: Ebrahim Chalangar
Categories:
Type: BOOK - Published: 2019-05-28 - Publisher: Linköping University Electronic Press

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The development of future electronics depends on the availability of suitable functional materials. Printed electronics, for example, relies on access to highly
Graphene Optoelectronics
Language: en
Pages: 352
Authors: Abdul Rashid bin M. Yusoff
Categories: Technology & Engineering
Type: BOOK - Published: 2014-08-25 - Publisher: John Wiley & Sons

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This first book on emerging applications for this innovative material gives an up-to-date account of the many opportunities graphene offers high-end optoelectro
Zinc Oxide Nanostructures: Synthesis and Characterization
Language: en
Pages: 303
Authors: Sotirios Baskoutas
Categories: Electronic books
Type: BOOK - Published: 2018-12-04 - Publisher: MDPI

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This book is a printed edition of the Special Issue "Zinc Oxide Nanostructures: Synthesis and Characterization" that was published in Materials