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Photoinduced Oxidation of Ultrathin Gallium Selenide.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Photoinduced Oxidation of Ultrathin Gallium Selenide./
Author:	Kowalski, Brian.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2022,
Description:	37 p.
Notes:	Source: Masters Abstracts International, Volume: 83-07.
Contained By:	Masters Abstracts International83-07.
Subject:	Nanoscience. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28865553
ISBN:	9798762187855

Photoinduced Oxidation of Ultrathin Gallium Selenide.
Kowalski, Brian.

Photoinduced Oxidation of Ultrathin Gallium Selenide. - Ann Arbor : ProQuest Dissertations & Theses, 2022 - 37 p.

Source: Masters Abstracts International, Volume: 83-07.

Thesis (M.S.)--New Mexico Institute of Mining and Technology, 2022.

This item must not be sold to any third party vendors.

The purpose of this study was to characterize one component of the unknown properties of ultrathin (2D) GaSe, the oxidation process in a humid environment. This decision was brought about when, it was realized the sensitivity of ultrathin GaSe to photoinduced oxidation. Follow-up work by other researchers showed that the rate of oxidation of ultrathin GaSe varies greatly depending on the surrounding environments humidity, but the research lacked a complete breakdown of what occurs at the chemical level. This study investigates the intermediate products that form during oxidation to better understand the chemistry of the whole oxidation process. The first step in this research was performing Raman spectroscopy on gallium selenide in ambient room conditions. It was during these tests that the phenomenon of photooxidation in gallium selenide was first noted. This finding, that gallium selenide would oxidize during analysis with a laser in ambient room conditions, led to a new branch of research on the subject. These early findings prompted further investigation into the field of photooxidation of gallium selenide and the processes that take place during oxidation. Our results show that a due to the humidity present a hydrated selenium dioxide (selenous acid, 2SeO2∗ H2O or H2SeO3) forms during the early stages of the oxidation process, helping to accelerate the oxidation process. Further reactions cause the decomposition of these intermediate products leading to the formation of the final oxidation products, Ga2O3, SeO2, and amorphous selenium. Raman spectra confirms both the intermediate products as well as the final oxidation products. The evidence of the hydroxide's formation and water soluble selenous acid during the water-assisted photo-induced oxidation explains the reported increase in oxidation speed.

ISBN: 9798762187855Subjects--Topical Terms:

587832
Nanoscience.
Subjects--Index Terms:

2D

Photoinduced Oxidation of Ultrathin Gallium Selenide.
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245 1 0 $a Photoinduced Oxidation of Ultrathin Gallium Selenide.
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300 $a 37 p.
500 $a Source: Masters Abstracts International, Volume: 83-07.
500 $a Advisor: Kalugin, Nikolai.
502 $a Thesis (M.S.)--New Mexico Institute of Mining and Technology, 2022.
506 $a This item must not be sold to any third party vendors.
520 $a The purpose of this study was to characterize one component of the unknown properties of ultrathin (2D) GaSe, the oxidation process in a humid environment. This decision was brought about when, it was realized the sensitivity of ultrathin GaSe to photoinduced oxidation. Follow-up work by other researchers showed that the rate of oxidation of ultrathin GaSe varies greatly depending on the surrounding environments humidity, but the research lacked a complete breakdown of what occurs at the chemical level. This study investigates the intermediate products that form during oxidation to better understand the chemistry of the whole oxidation process. The first step in this research was performing Raman spectroscopy on gallium selenide in ambient room conditions. It was during these tests that the phenomenon of photooxidation in gallium selenide was first noted. This finding, that gallium selenide would oxidize during analysis with a laser in ambient room conditions, led to a new branch of research on the subject. These early findings prompted further investigation into the field of photooxidation of gallium selenide and the processes that take place during oxidation. Our results show that a due to the humidity present a hydrated selenium dioxide (selenous acid, 2SeO2∗ H2O or H2SeO3) forms during the early stages of the oxidation process, helping to accelerate the oxidation process. Further reactions cause the decomposition of these intermediate products leading to the formation of the final oxidation products, Ga2O3, SeO2, and amorphous selenium. Raman spectra confirms both the intermediate products as well as the final oxidation products. The evidence of the hydroxide's formation and water soluble selenous acid during the water-assisted photo-induced oxidation explains the reported increase in oxidation speed.
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