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Design, synthesis, and application o...

White, Meghann Anne.

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Design, synthesis, and application of functional nanomaterials.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Design, synthesis, and application of functional nanomaterials./
Author:	White, Meghann Anne.
Description:	135 p.
Notes:	Source: Dissertation Abstracts International, Volume: 68-09, Section: B, page: 5953.
Contained By:	Dissertation Abstracts International68-09B.
Subject:	Chemistry, Inorganic. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3285199
ISBN:	9780549272212

Design, synthesis, and application of functional nanomaterials.
White, Meghann Anne.

Design, synthesis, and application of functional nanomaterials. - 135 p.

Source: Dissertation Abstracts International, Volume: 68-09, Section: B, page: 5953.

Thesis (Ph.D.)--Columbia University, 2007.

The main theme of the research that is described in this thesis as outlined in chapter one, is the design of new "universal" ligands for nanocrystals. These ligands not only prevent nanocrystal aggregation and dictate the solubility of the nanocrystals in solution, but also provide a functional handle that allows for further chemical modification to suit specific applications determined by the experimentalist. The functional ligands must fit three criteria: (1) they must possess a robust anchor that can bind generally to a variety of metal oxide surfaces; (2) they must possess a tailored surface group that acts as a spacer or branch from the metal oxide surface and (3) they must be amenable to a general methods for covalently attaching a functional perimeter to the spacers through efficient and high yielding chemical transformations ("click" reactions). The high yielding "click" reaction that is used in this thesis is the Cu-catalyzed azide-alkyne cycloaddition (CuAAC) reaction.

ISBN: 9780549272212Subjects--Topical Terms:

517253
Chemistry, Inorganic.

Design, synthesis, and application of functional nanomaterials.
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100 1 $a White, Meghann Anne. $3 1279954
245 1 0 $a Design, synthesis, and application of functional nanomaterials.
300 $a 135 p.
500 $a Source: Dissertation Abstracts International, Volume: 68-09, Section: B, page: 5953.
502 $a Thesis (Ph.D.)--Columbia University, 2007.
520 $a The main theme of the research that is described in this thesis as outlined in chapter one, is the design of new "universal" ligands for nanocrystals. These ligands not only prevent nanocrystal aggregation and dictate the solubility of the nanocrystals in solution, but also provide a functional handle that allows for further chemical modification to suit specific applications determined by the experimentalist. The functional ligands must fit three criteria: (1) they must possess a robust anchor that can bind generally to a variety of metal oxide surfaces; (2) they must possess a tailored surface group that acts as a spacer or branch from the metal oxide surface and (3) they must be amenable to a general methods for covalently attaching a functional perimeter to the spacers through efficient and high yielding chemical transformations ("click" reactions). The high yielding "click" reaction that is used in this thesis is the Cu-catalyzed azide-alkyne cycloaddition (CuAAC) reaction.
520 $a Chapters two and three will present the functionalization of gamma-Fe 2O3 nanocrystals with various "click" functional ligands (both azide and alkyne) using a ligand exchange procedure, followed by the covalent attachment of both small molecules and poly(tert-butyl acrylate) using the CuAAC reaction. The nanocrystals were characterized using Transmission Electron Microscopy (TEM), Fourier Transform Infrared (FTIR) spectroscopy, Nuclear Magnetic Resonance (NMR) spectroscopy, and Thermogravimetric Analysis (TGA). It was determined that the ligands bind strongly to the nanocrystal core, and that the CuAAC reaction was effective for the further chemical modification of the nanocrystals using both small molecules and polymers.
520 $a Chapter four will describe the functionalization of anatase TiO 2 nanocrystals with an alkyne functional phosphonate ligand, which will then be used to covalently link both polystyrene and poly(tert-butyl acrylate) to the surface of the nanocrystals using the CuAAC reaction. The nanocrystals were characterized using TEM, FTIR, and TGA, and the resultant materials were exploited for their dielectric properties in the fabrication of devices for flexible electronics applications. Both materials exhibit acceptable performance as the dielectric layer in capacitors and thin film transistors (TFTs).
590 $a School code: 0054.
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710 2 $a Columbia University. $3 571054
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792 $a 2007
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