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Synthesis and Electrical Characterization of Copper Oxide Nanowires.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Synthesis and Electrical Characterization of Copper Oxide Nanowires./
Author:	Banerjee, Sriya.
Description:	1 online resource (193 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 78-07(E), Section: B.
Subject:	Materials science. -
Online resource:	click for full text (PQDT)
ISBN:	9781369570526

Synthesis and Electrical Characterization of Copper Oxide Nanowires.
Banerjee, Sriya.

Synthesis and Electrical Characterization of Copper Oxide Nanowires. - 1 online resource (193 pages)

Source: Dissertation Abstracts International, Volume: 78-07(E), Section: B.

Thesis (Ph.D.)--Washington University in St. Louis, 2017.

Includes bibliographical references

Cupric oxide (CuO) is an attractive materials platform for solar energy harvesting, owing to its suitable band gap (1.4 eV) and p-type electrical conductivity. Thermal oxidation of copper foils provides a manufacturing scalable synthesis platform for single crystal CuO nanowires. However, a common problem encountered in thermally oxidized copper foils is the scaling of the oxide layer from the metal foil, which prevents fabrication of functional devices. A secondary problem is the reliability of CuO under bias and illumination conditions which leads to photocorrosion and loss in functionality of CuO as a useful energy harvesting material.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781369570526Subjects--Topical Terms:

557839
Materials science.
Index Terms--Genre/Form:

554714
Electronic books.

Synthesis and Electrical Characterization of Copper Oxide Nanowires.
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100 1 $a Banerjee, Sriya. $3 1186909
245 1 0 $a Synthesis and Electrical Characterization of Copper Oxide Nanowires.
264 0 $c 2017
300 $a 1 online resource (193 pages)
336 $a text $b txt $2 rdacontent
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500 $a Source: Dissertation Abstracts International, Volume: 78-07(E), Section: B.
500 $a Adviser: Parag Banerjee.
502 $a Thesis (Ph.D.)--Washington University in St. Louis, 2017.
504 $a Includes bibliographical references
520 $a Cupric oxide (CuO) is an attractive materials platform for solar energy harvesting, owing to its suitable band gap (1.4 eV) and p-type electrical conductivity. Thermal oxidation of copper foils provides a manufacturing scalable synthesis platform for single crystal CuO nanowires. However, a common problem encountered in thermally oxidized copper foils is the scaling of the oxide layer from the metal foil, which prevents fabrication of functional devices. A secondary problem is the reliability of CuO under bias and illumination conditions which leads to photocorrosion and loss in functionality of CuO as a useful energy harvesting material.
520 $a This thesis addresses these specific challenges in the CuO system by, (1) engineering a strategy to develop mechanically adherent CuO nanowire films through the use of Cu-alloys as a substrate and, (2) improving the chemical stability of CuO photocathodes in aqueous solutions via surface engineering of the nanowires.
520 $a In the first part of this thesis, the synthesis of CuO nanowires is studied on Cu-alloy substrates. Two Cu-alloy systems are chosen, (1) Cu-Zn alloy (brass) and, (2) Cu-Sn alloy (bronze). A 2-step thermal oxidation protocol selectively eliminates Zn from the alloy surface and a mechanically adherent CuO film is developed as a photocathode for photoelectrochemical water reduction. On the other hand, such oxidation of bronze produces a mixed CuO and SnO 2 nanostructured oxide. The surface conductivity is highly sensitive to the oxygen partial pressure and thus, oxidized bronze shows promise as an O2 sensor.
520 $a The second part of the thesis involves surface engineering of CuO nanowires via (1) homogeneous and (2) heterogeneous passivation layers, aimed at eliminating photocorrosion on CuO nanowires surfaces. First, a 3 nm Cu2-deltaO amorphous layer is grown on CuO nanowires that is effective in providing a photocurrent stability of 96% for over 3.5 hours of testing. Second, atomically thin Al2O3 layer is deposited on CuO nanowires and results in changes to the oxidation state of the nanowire surface and results in an improved photoresponse.
520 $a The study presented in this thesis opens up new avenues of engineering alloy surfaces for viable nanowire device applications. In addition, surface engineering driven efforts to improve the reliability of CuO are demonstrated. Thus, this thesis addresses key bottleneck issues in making manufacturing scalable and reliable CuO nanowire based devices.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Materials science. $3 557839
650 4 $a Energy. $3 784773
650 4 $a Nanoscience. $3 632473
655 7 $a Electronic books. $2 local $3 554714
690 $a 0794
690 $a 0791
690 $a 0565
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a Washington University in St. Louis. $b Mechanical Engineering. $3 1148609
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10256600 $z click for full text (PQDT)