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Chemical grafting of molecular and b...

The University of Wisconsin - Madison.

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Chemical grafting of molecular and biomolecular layers to compound semiconductor surfaces.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Chemical grafting of molecular and biomolecular layers to compound semiconductor surfaces./
Author:	Kim, Heesuk.
Description:	124 p.
Notes:	Adviser: Robert J. Hamers.
Contained By:	Dissertation Abstracts International69-05B.
Subject:	Chemistry, Analytical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3314188
ISBN:	9780549632719

Chemical grafting of molecular and biomolecular layers to compound semiconductor surfaces.
Kim, Heesuk.

Chemical grafting of molecular and biomolecular layers to compound semiconductor surfaces. - 124 p.

Adviser: Robert J. Hamers.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2008.

Chemical grafting of organic molecules to semiconductors is emerging as an important growth area in the development of new semiconductor-based materials and devices.

ISBN: 9780549632719Subjects--Topical Terms:

586156
Chemistry, Analytical.

Chemical grafting of molecular and biomolecular layers to compound semiconductor surfaces.
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008 101007s2008 ||||||||||||||||| ||eng d
020 $a 9780549632719
035 $a (UMI)AAI3314188
035 $a AAI3314188
040 $a UMI $c UMI
100 1 $a Kim, Heesuk. $3 1057995
245 1 0 $a Chemical grafting of molecular and biomolecular layers to compound semiconductor surfaces.
300 $a 124 p.
500 $a Adviser: Robert J. Hamers.
500 $a Source: Dissertation Abstracts International, Volume: 69-05, Section: B, page: 2964.
502 $a Thesis (Ph.D.)--The University of Wisconsin - Madison, 2008.
520 $a Chemical grafting of organic molecules to semiconductors is emerging as an important growth area in the development of new semiconductor-based materials and devices.
520 $a The first part of this thesis reports the chemical grafting of organic layers to gallium nitride thin films. One method is the photochemical grafting of alkenes to H-terminated GaN (0001) surface with formation of dense, self-terminating molecular layers. After photochemical functionalization, the organic layers were used to immobilize DNA biomolecules onto the GaN surface. The DNA-modified GaN surfaces showed excellent selectivity for hybridization with fluorescence tagged complementary and non-complementary DNA, and they showed good stability over repeated cycles of hybridization and denaturation. These results demonstrate that GaN can be used a substrate for integrating organic molecules into wet-chemical and biological environments. The other method is the thereto grafting of organophosphonic acids to the oxide layer of GaN surface. The density and stability of molecular layers produced using photochemical method are compared with those produced using chemical attachment via phosphonate groups.
520 $a The second part of this thesis shows that this photochemical grafting of alkenes can be extended to oxide materials such as titanium dioxide in both anatase and rutile forms when illuminated with UV light. This provides a versatile way to covalently link functional organic molecules directly to oxide semiconductors. Measurements have been performed on epitaxial thin films of anatase (001), bulk crystals of anatase(101), rutile (001), rutile (110), and nanocrystalline anatase. Quantitative XPS and FTIR measurements have been used to investigate the kinetics of functionalization and its dependence on the structure of the bulk samples, exposed crystal face, photon energy and functional groups of alkenes. The mechanism of photochemical grafting of alkenes to titanium dioxide is discussed based on these results.
590 $a School code: 0262.
650 4 $a Chemistry, Analytical. $3 586156
650 4 $a Engineering, Materials Science. $3 1017759
690 $a 0486
690 $a 0794
710 2 $a The University of Wisconsin - Madison. $3 626640
773 0 $t Dissertation Abstracts International $g 69-05B.
790 $a 0262
790 1 0 $a Hamers, Robert J., $e advisor
791 $a Ph.D.
792 $a 2008
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3314188