Ghent University Academic Bibliography

Advanced

Synthesis and self-assembly of colloidal quantum dots

Karel Lambert UGent (2011)
abstract
In this work, we study the synthesis and self-assembly of colloidal quantum dots (QDs). First, the InP and CdSe QDs are synthesized using the hot-injection synthesis procedure, and the optical and crystallographic properties are characterized via UV-vis absorbance and photoluminescence spectroscopy and X-ray diffraction. The photoluminescence properties of the CdSe dots are optimized by surrounding the particles with a CdS or ZnS shell. The particles are further characterized via Transmission Electron Microscopy (TEM). Nuclear Magnetic Resonance is used to access information about the ligand molecules which stabilize the particles. Next, the possibilities of Langmuir-Blodgett (LB) and Langmuir-Schaefer (LS) deposition are explored to produce QD monolayers and multilayers. The layer quality is assessed via Atomic Force Microscopy, Scanning Electron Microscopy and TEM. We see that the LS and LB techniques both yield excellent mono- and multilayers, although LS deposition yields different results on hydrophilic and hydrophobic substrates. Combination of LB or LS deposition with optical lithography yields micropatterned layers. Also phase transitions of Langmuir layers upon compression beyond the collapse pressure are studied, and a thermodynamic model for the transitions is suggested. Finally, the effects of Atomic Layer Deposition of aluminium oxide layers on the photoluminescence properties of the QD layers is studied.
Please use this url to cite or link to this publication:
author
promoter
UGent
organization
year
type
dissertation (monograph)
subject
keyword
Langmuir-Schaefer, Langmuir-Blodgett, Nanocrystals, TEM
pages
XII, 185 pages
publisher
Ghent University. Faculty of Sciences
place of publication
Ghent, Belgium
defense location
Gent : Campus Sterre (S3, auditorium 3.02)
defense date
2011-04-01 15:30
language
English
UGent publication?
yes
classification
D1
copyright statement
I have retained and own the full copyright for this publication
id
1214466
handle
http://hdl.handle.net/1854/LU-1214466
date created
2011-04-28 20:09:16
date last changed
2011-04-29 08:53:59
@phdthesis{1214466,
  abstract     = {In this work, we study the synthesis and self-assembly of colloidal quantum dots (QDs). First, the InP and CdSe QDs are synthesized using the hot-injection synthesis procedure, and the optical and crystallographic properties are characterized via UV-vis absorbance and photoluminescence spectroscopy and X-ray diffraction. The photoluminescence properties of the CdSe dots are optimized by surrounding the particles with a CdS or ZnS shell. The particles are further characterized via Transmission Electron Microscopy (TEM). Nuclear Magnetic Resonance is used to access information about the ligand molecules which stabilize the particles. Next, the possibilities of Langmuir-Blodgett (LB) and Langmuir-Schaefer (LS) deposition are explored to produce QD monolayers and multilayers. The layer quality is assessed via Atomic Force Microscopy, Scanning Electron Microscopy and TEM. We see that the LS and LB techniques both yield excellent mono- and multilayers, although LS deposition yields different results on hydrophilic and hydrophobic substrates. Combination of LB or LS deposition with optical lithography yields micropatterned layers. Also phase transitions of Langmuir layers upon compression beyond the collapse pressure are studied, and a thermodynamic model for the transitions is suggested. Finally, the effects of Atomic Layer Deposition of aluminium oxide layers on the photoluminescence properties of  the QD layers is studied.},
  author       = {Lambert, Karel},
  keyword      = {Langmuir-Schaefer,Langmuir-Blodgett,Nanocrystals,TEM},
  language     = {eng},
  pages        = {XII, 185},
  publisher    = {Ghent University. Faculty of Sciences},
  school       = {Ghent University},
  title        = {Synthesis and self-assembly of colloidal quantum dots},
  year         = {2011},
}

Chicago
Lambert, Karel. 2011. “Synthesis and Self-assembly of Colloidal Quantum Dots”. Ghent, Belgium: Ghent University. Faculty of Sciences.
APA
Lambert, Karel. (2011). Synthesis and self-assembly of colloidal quantum dots. Ghent University. Faculty of Sciences, Ghent, Belgium.
Vancouver
1.
Lambert K. Synthesis and self-assembly of colloidal quantum dots. [Ghent, Belgium]: Ghent University. Faculty of Sciences; 2011.
MLA
Lambert, Karel. “Synthesis and Self-assembly of Colloidal Quantum Dots.” 2011 : n. pag. Print.