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Chemistry at the interface between inorganic nanocrystals and their ligands.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Chemistry at the interface between inorganic nanocrystals and their ligands./
Author:	Aldana, Jose Fernando.
Description:	1 online resource (109 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 69-11, Section: B.
Contained By:	Dissertations Abstracts International69-11B.
Subject:	Analytical chemistry. -
Online resource:	click for full text (PQDT)
ISBN:	9780549360476

Chemistry at the interface between inorganic nanocrystals and their ligands.
Aldana, Jose Fernando.

Chemistry at the interface between inorganic nanocrystals and their ligands. - 1 online resource (109 pages)

Source: Dissertations Abstracts International, Volume: 69-11, Section: B.

Thesis (Ph.D.)--University of Arkansas, 2007.

Includes bibliographical references

Colloidal inorganic nanocrystals have been of great interest for fundamental research and industrial development in recent years due to their flexible processibility and unique properties. Colloidal nanocrystals are metastable species in comparison to the corresponding bulk crystals/solids and have to be kinetically stabilized. The most common method to keep them stable is chemically attaching a monolayer of organic molecules to the atoms on the surface of nanocrystals. These organic molecules are often called surfactants, capping groups, or ligands. In addition to the protection function, this monolayer of ligands on the surface of a nanocrystal provides the necessary chemical accessibility for the nanocrystals by varying the terminal groups of the ligands pointing to the outside environment. For both of the functions, the stability of the ligands on the surface of nanocrystals is the key concern, which ultimately determines the stability of the entire nanocrystal/ligands complex. Not much is known regarding the nature and chemical properties of the binding between nanocrystals and their ligands. The following study looks to gather more information about this nature by: (1) studying the stability of ligands on the nanocrystal surface under pH stress, (2) studying the photochemical instability of colloidal nanocrystals exposed to ultraviolet light, and (3) using the photoluminescence of colloidal nanocrystals to determine the packing of ligands on the surface of the nanocrystals.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9780549360476Subjects--Topical Terms:

1182118
Analytical chemistry.
Subjects--Index Terms:

Colloidal nanocrystalsIndex Terms--Genre/Form:

554714
Electronic books.

Chemistry at the interface between inorganic nanocrystals and their ligands.
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520 $a Colloidal inorganic nanocrystals have been of great interest for fundamental research and industrial development in recent years due to their flexible processibility and unique properties. Colloidal nanocrystals are metastable species in comparison to the corresponding bulk crystals/solids and have to be kinetically stabilized. The most common method to keep them stable is chemically attaching a monolayer of organic molecules to the atoms on the surface of nanocrystals. These organic molecules are often called surfactants, capping groups, or ligands. In addition to the protection function, this monolayer of ligands on the surface of a nanocrystal provides the necessary chemical accessibility for the nanocrystals by varying the terminal groups of the ligands pointing to the outside environment. For both of the functions, the stability of the ligands on the surface of nanocrystals is the key concern, which ultimately determines the stability of the entire nanocrystal/ligands complex. Not much is known regarding the nature and chemical properties of the binding between nanocrystals and their ligands. The following study looks to gather more information about this nature by: (1) studying the stability of ligands on the nanocrystal surface under pH stress, (2) studying the photochemical instability of colloidal nanocrystals exposed to ultraviolet light, and (3) using the photoluminescence of colloidal nanocrystals to determine the packing of ligands on the surface of the nanocrystals.
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