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Size-dependent properties of semicon...

University of Minnesota., Chemical Engineering.

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Size-dependent properties of semiconductor nanostructures.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Size-dependent properties of semiconductor nanostructures./
Author:	Kwak, Hyun Wook.
Description:	105 p.
Notes:	Adviser: James R. Chelikowsky.
Contained By:	Dissertation Abstracts International70-04B.
Subject:	Engineering, Chemical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3352805
ISBN:	9781109110548

Size-dependent properties of semiconductor nanostructures.
Kwak, Hyun Wook.

Size-dependent properties of semiconductor nanostructures. - 105 p.

Adviser: James R. Chelikowsky.

Thesis (Ph.D.)--University of Minnesota, 2009.

Doping is crucial to many potential applications of nanometer-sized semiconductors. Since their properties are strongly affected by both doping and quantum size effect, it is important to understand how dopants will influence its media under strong quantum confinement. In this dissertation, we will discuss the role of quantum confinement in the properties of nanometer-sized semiconductors doped with impurities. It is well-known that electronic and optical properties of nanometer-sized semiconductors can vary with size. We present size-dependent properties of lithium doped silicon and zinc oxide nanocrystals as examples. With the help of first-principles methods based on real space approach, we find that not only the size itself but also the chemical nature of the impurity is important to determine the properties of nanometer-sized semiconductors. We will also discuss size-induced magnetism in semiconductor nanostructures doped with non-magnetic impurities. From recent studies, it has been proposed that magnetic semiconductors can be designed by using non-magnetic defects, e.g., through the introduction of an extrinsic impurity atom that does not exhibit magnetism by itself. We examine this idea with silicon and zinc oxide nanostructures doped with impurities. We find that quantum size effect may induce magnetism in doped nanostructures. The evidence of the size-dependent magnetic properties offers a new perspective for the design of semiconductor-based spintronic materials.

ISBN: 9781109110548Subjects--Topical Terms:

1018531
Engineering, Chemical.

Size-dependent properties of semiconductor nanostructures.
LDR:02537nam 2200325 a 45 001 855294
005 20100708
008 100708s2009 ||||||||||||||||| ||eng d
020 $a 9781109110548
035 $a (UMI)AAI3352805
035 $a AAI3352805
040 $a UMI $c UMI
100 1 $a Kwak, Hyun Wook. $3 1021871
245 1 0 $a Size-dependent properties of semiconductor nanostructures.
300 $a 105 p.
500 $a Adviser: James R. Chelikowsky.
500 $a Source: Dissertation Abstracts International, Volume: 70-04, Section: B, page: 2433.
502 $a Thesis (Ph.D.)--University of Minnesota, 2009.
520 $a Doping is crucial to many potential applications of nanometer-sized semiconductors. Since their properties are strongly affected by both doping and quantum size effect, it is important to understand how dopants will influence its media under strong quantum confinement. In this dissertation, we will discuss the role of quantum confinement in the properties of nanometer-sized semiconductors doped with impurities. It is well-known that electronic and optical properties of nanometer-sized semiconductors can vary with size. We present size-dependent properties of lithium doped silicon and zinc oxide nanocrystals as examples. With the help of first-principles methods based on real space approach, we find that not only the size itself but also the chemical nature of the impurity is important to determine the properties of nanometer-sized semiconductors. We will also discuss size-induced magnetism in semiconductor nanostructures doped with non-magnetic impurities. From recent studies, it has been proposed that magnetic semiconductors can be designed by using non-magnetic defects, e.g., through the introduction of an extrinsic impurity atom that does not exhibit magnetism by itself. We examine this idea with silicon and zinc oxide nanostructures doped with impurities. We find that quantum size effect may induce magnetism in doped nanostructures. The evidence of the size-dependent magnetic properties offers a new perspective for the design of semiconductor-based spintronic materials.
590 $a School code: 0130.
650 4 $a Engineering, Chemical. $3 1018531
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Physics, Theory. $3 1019422
690 $a 0542
690 $a 0753
690 $a 0794
710 2 $a University of Minnesota. $b Chemical Engineering. $3 1021870
773 0 $t Dissertation Abstracts International $g 70-04B.
790 $a 0130
790 1 0 $a Chelikowsky, James R., $e advisor
790 1 0 $a Derby, Jeff J. $e committee member
790 1 0 $a Kumar, Satish $e committee member
790 1 0 $a Saad, Yousef $e committee member
791 $a Ph.D.
792 $a 2009
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3352805