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Synthesis and Electrical Characteriz...

Banerjee, Sriya.

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Synthesis and Electrical Characterization of Copper Oxide Nanowires.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Synthesis and Electrical Characterization of Copper Oxide Nanowires./
作者:	Banerjee, Sriya.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
面頁冊數:	193 p.
附註:	Source: Dissertation Abstracts International, Volume: 78-07(E), Section: B.
Contained By:	Dissertation Abstracts International78-07B(E).
標題:	Materials science. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10256600
ISBN:	9781369570526

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

Synthesis and Electrical Characterization of Copper Oxide Nanowires. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 193 p.

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

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

This item is not available from ProQuest Dissertations & Theses.

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.

ISBN: 9781369570526Subjects--Topical Terms:

543314
Materials science.

Synthesis and Electrical Characterization of Copper Oxide Nanowires.
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300 $a 193 p.
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.
506 $a This item is not available from ProQuest Dissertations & Theses.
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.
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