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Atomic-Scale Characterization, Nanos...

Lukanov, Boris Rumenov.

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Atomic-Scale Characterization, Nanostructure and Applications of Alkaline-Earth Thin Films on Germanium.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Atomic-Scale Characterization, Nanostructure and Applications of Alkaline-Earth Thin Films on Germanium./
Author:	Lukanov, Boris Rumenov.
Description:	168 p.
Notes:	Source: Dissertation Abstracts International, Volume: 74-11(E), Section: B.
Contained By:	Dissertation Abstracts International74-11B(E).
Subject:	Engineering, Materials Science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3572044
ISBN:	9781303299582

Atomic-Scale Characterization, Nanostructure and Applications of Alkaline-Earth Thin Films on Germanium.
Lukanov, Boris Rumenov.

Atomic-Scale Characterization, Nanostructure and Applications of Alkaline-Earth Thin Films on Germanium. - 168 p.

Source: Dissertation Abstracts International, Volume: 74-11(E), Section: B.

Thesis (Ph.D.)--Yale University, 2013.

One of the major advances in science over the past three decades has been our ability to study and manufacture materials and device components at ever-smaller scales. As this miniaturization trend continues, detailed understanding of the atomic structure of surfaces and interfaces will have profound implications on the design of functional systems at the nanoscale. In this work, we employ scanning tunneling microscopy (STM), electron diffraction, and other experimental techniques, complemented by density functional theory (DFT), to explore the interaction of alkaline-earth metals with the Ge (001) surface on the atomic scale. Our results reveal a complex series of phase transitions as the alkaline-earth coverage is varied. Each phase transition is accompanied by significant changes in the surface morphology that can only be explained by mass transfer induced by the formation of alloy surfaces. Through comparison of the bias dependence of atomic-resolution STM images with DFT predictions, we develop atomic structural models of the surface alloy phases. Incorporation of the larger alkaline earth atoms into the Ge surface creates strain that is ultimately relieved by the formation of remarkably well-ordered arrays of islands and trenches. With applications in mind, we investigate the possibility of shape and strain-driven self-organization of these structures on a pre-patterned Ge surface. Finally, we explore the photocatalytic properties of BaTiO3/Ge epitaxial heterostructures and demonstrate photoreduction of Ag+ on the BaTiO3 surface with visible light only.

ISBN: 9781303299582Subjects--Topical Terms:

1017759
Engineering, Materials Science.

Atomic-Scale Characterization, Nanostructure and Applications of Alkaline-Earth Thin Films on Germanium.
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035 $a (MiAaPQ)AAI3572044
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100 1 $a Lukanov, Boris Rumenov. $3 2106378
245 1 0 $a Atomic-Scale Characterization, Nanostructure and Applications of Alkaline-Earth Thin Films on Germanium.
300 $a 168 p.
500 $a Source: Dissertation Abstracts International, Volume: 74-11(E), Section: B.
500 $a Adviser: Eric I. Atlman.
502 $a Thesis (Ph.D.)--Yale University, 2013.
520 $a One of the major advances in science over the past three decades has been our ability to study and manufacture materials and device components at ever-smaller scales. As this miniaturization trend continues, detailed understanding of the atomic structure of surfaces and interfaces will have profound implications on the design of functional systems at the nanoscale. In this work, we employ scanning tunneling microscopy (STM), electron diffraction, and other experimental techniques, complemented by density functional theory (DFT), to explore the interaction of alkaline-earth metals with the Ge (001) surface on the atomic scale. Our results reveal a complex series of phase transitions as the alkaline-earth coverage is varied. Each phase transition is accompanied by significant changes in the surface morphology that can only be explained by mass transfer induced by the formation of alloy surfaces. Through comparison of the bias dependence of atomic-resolution STM images with DFT predictions, we develop atomic structural models of the surface alloy phases. Incorporation of the larger alkaline earth atoms into the Ge surface creates strain that is ultimately relieved by the formation of remarkably well-ordered arrays of islands and trenches. With applications in mind, we investigate the possibility of shape and strain-driven self-organization of these structures on a pre-patterned Ge surface. Finally, we explore the photocatalytic properties of BaTiO3/Ge epitaxial heterostructures and demonstrate photoreduction of Ag+ on the BaTiO3 surface with visible light only.
590 $a School code: 0265.
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Physics, Condensed Matter. $3 1018743
650 4 $a Nanotechnology. $3 526235
650 4 $a Chemistry, Inorganic. $3 517253
690 $a 0794
690 $a 0611
690 $a 0652
690 $a 0488
710 2 $a Yale University. $b Mechanical Engineering and Materials Science. $3 2106379
773 0 $t Dissertation Abstracts International $g 74-11B(E).
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791 $a Ph.D.
792 $a 2013
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3572044