Doctoral Dissertations

Abstract

"This dissertation presents a simple method for the photolithographic patterning of silica hydrogel monoliths and planar substrates with quantum dots and inorganic semiconductor nanoparticles. We developed a method for surface patterning and bulk (3D) patterning of silica hydrogel monoliths and surface patterning of planar substrates with CdS, CdSe, PbS and PbSe quantum dots using infrared light, ultraviolet light, X-rays, and multi-photon ionization radiation. Precursor combinations were prepared which can readily dissociate with IR, UV, X-rays, and multi-photon ionization radiation. Different capping agents were used for improving quantum dot size distribution. The luminescence quantum yield of the composites can be increased to up to 30% with photoactivation. A masking technique was developed with which we can photolithograph sophisticated patterns with CdSe quantum dots on the surface of silica hydrogels that are highly luminescent without any further photoactivation. These are bottom-up methods, water-based, use readily available reagents and need only a few simple processing steps. These are attractive features for applications, and we anticipate that the technique may be employed for large-scale production of quantum dots in the near future"--Abstract, page iv.

Advisor(s)

Bertino, Massimo F.

Committee Member(s)

Yamilov, Alexey
Story, J. Greg
Leventis, Nicholas
Waddill, George Daniel

Department(s)

Physics

Degree Name

Ph. D. in Physics

Sponsor(s)

Missouri Research Board
United States. Department of Energy

Publisher

University of Missouri--Rolla

Publication Date

Fall 2007

Journal article titles appearing in thesis/dissertation

  • Laser writing of semiconductor nanoparticles and quantum dots
  • Patterning porous matrices and planar substrates with quantum dots
  • Infrared quantum dot photolithography
  • Quantum dots by ultraviolet and X-ray lithography
  • Three-dimensional semiconductor patterning

Pagination

xiv, 135 pages

Note about bibliography

Includes bibliographical references.

Rights

© 2007 Raghuveer Reddy Gadipalli, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Colloids -- Optical properties
Nanotechnology
Photolithography
Quantum dots -- Optical properties
Quantum dots
Silica gel

Thesis Number

T 9883

Print OCLC #

775802458

Electronic OCLC #

756045198

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