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|
Identifier |
000465802 |
Title |
Pulsed laser processing of graphene-based materials |
Alternative Title |
Κατεργασία υλικών με βάση το γραφένιο με χρήση παλμικών λέιζερ |
Author
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Μιχαήλ, Αντρέας Μ.
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Thesis advisor
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Στρατάκης, Εμμανουήλ
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Reviewer
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Κιοσέογλου, Γεώργιος
Ηλιόπουλος, Ελευθέριος
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Abstract |
In recent years, graphene, due to its exceptional properties, has attracted attention in the research field.
Graphene and its derivatives have been extensively used in applications such as energy, sensors, etc.
The main objective of this thesis was to investigate the optimal conditions for the reduction of graphene
oxide using laser irradiation. The motivation behind this study was the future utilization of reduced
graphene oxide in energy-related applications, such as photovoltaic systems and hydrogen production
through electrocatalysis.
Initially, a brief description of graphene and its exceptional properties is given. Its structure and
preparation methods are described, as well as the reduction of graphene oxide used in this work. Next,
graphene oxide is similarly described, along with its reduction methods. At the end of the first section,
the basic principles of the characterization methods used in the experimental process are briefly
described.
The second section is dedicated to describing the experimental process for the production and study of
the final reduced graphene oxide films. Initially, the preparation process of both the initial graphene
oxide solution and its deposition on the substrate is recorded. Then, the reduction process is described,
using pulsed infrared lasers with three different pulse durations. The study is conducted on films with
thicknesses of two hundred and one hundred nanometers. Next, the characterization methods are
presented. Finally, a very interesting application for electrocatalytic hydrogen production, using the
produced films, is briefly described.
The final results are summarized in the last section, where the optimal reduction conditions for the
different pulse durations and the two discussed thicknesses are presented. The results were captured
through various spectroscopy measurements, electrical measurements, and microscopy images.
Finally, results from the electrocatalytic hydrogen production are presented.
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Language |
English |
Subject |
Graphene oxide |
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Graphene oxide reduction |
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Infrared laser |
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Pulse duration |
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Αναγωγή οξειδίου του γραφενίου |
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Διάρκεια παλμού |
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Οξείδιο του γραφενίου |
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Υπέρυθρο λέιζερ |
Issue date |
2024-07-11 |
Collection
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School/Department--School of Sciences and Engineering--Department of Physics--Post-graduate theses
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Type of Work--Post-graduate theses
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Permanent Link |
https://elocus.lib.uoc.gr//dlib/1/3/1/metadata-dlib-1719843479-152829-11233.tkl
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Views |
240 |