Punctuated island growth: An approach to examination and control of quantum dot density, size, and shape evolution

1999 ◽  
Vol 75 (1) ◽  
pp. 85-87 ◽  
Author(s):  
I. Mukhametzhanov ◽  
Z. Wei ◽  
R. Heitz ◽  
A. Madhukar
Keyword(s):  
Quantum Dot ◽  
Shape Evolution ◽  
Island Growth ◽  
Size And Shape ◽  
Dot Density ◽  
And Control

scholarly journals Feedback Control for the Size and Shape Evolution of Needle-like Crystals in Suspension. IV. Modeling and Control of Dissolution

2019 ◽  
Vol 19 (7) ◽  
pp. 4029-4043 ◽  
Author(s):  
Stefan Bötschi ◽  
Ashwin Kumar Rajagopalan ◽  
Manfred Morari ◽  
Marco Mazzotti
Keyword(s):  
Feedback Control ◽  
Shape Evolution ◽  
Modeling And Control ◽  
Size And Shape ◽  
And Control

Quantum Dot Solar Cells. Tuning Photoresponse through Size and Shape Control of CdSe−TiO2Architecture

2008 ◽  
Vol 130 (12) ◽  
pp. 4007-4015 ◽  
Author(s):  
Anusorn Kongkanand ◽  
Kevin Tvrdy ◽  
Kensuke Takechi ◽  
Masaru Kuno ◽  
Prashant V. Kamat
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Shape Control ◽  
Size And Shape ◽  
Quantum Dot Solar Cells

scholarly journals Feedback Control for the Size and Shape Evolution of Needle-like Crystals in Suspension. I. Concepts and Simulation Studies

2018 ◽  
Vol 18 (8) ◽  
pp. 4470-4483 ◽  
Author(s):  
Stefan Bötschi ◽  
Ashwin Kumar Rajagopalan ◽  
Manfred Morari ◽  
Marco Mazzotti
Keyword(s):  
Feedback Control ◽  
Shape Evolution ◽  
Simulation Studies ◽  
Size And Shape

scholarly journals Feedback Control for the Size and Shape Evolution of Needle-like Crystals in Suspension. II. Cooling Crystallization Experiments

2018 ◽  
Vol 18 (10) ◽  
pp. 6185-6196 ◽  
Author(s):  
Ashwin Kumar Rajagopalan ◽  
Stefan Bötschi ◽  
Manfred Morari ◽  
Marco Mazzotti
Keyword(s):  
Feedback Control ◽  
Shape Evolution ◽  
Size And Shape ◽  
Cooling Crystallization ◽  
Crystallization Experiments

scholarly journals Alumina-Doped Zirconia Submicro-Particles: Synthesis, Thermal Stability, and Microstructural Characterization

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2856 ◽  
Author(s):  
Gregor Thomas Dahl ◽  
Sebastian Döring ◽  
Tobias Krekeler ◽  
Rolf Janssen ◽  
Martin Ritter ◽  
...  
Keyword(s):  
Grain Growth ◽  
Sol Gel ◽  
Microstructural Characterization ◽  
Alumina Content ◽  
Stabilizing Agents ◽  
Precise Control ◽  
Size And Shape ◽  
Elemental Analyses ◽  
Sol Gel Synthesis ◽  
And Control

Zirconia nanoceramics are interesting materials for numerous high-temperature applications. Because their beneficial properties are mainly governed by the crystal and microstructure, it is essential to understand and control these features. The use of co-stabilizing agents in the sol-gel synthesis of zirconia submicro-particles should provide an effective tool for adjusting the particles’ size and shape. Furthermore, alumina-doping is expected to enhance the particles’ size and shape persistence at high temperatures, similar to what is observed in corresponding bulk ceramics. Dispersed alumina should inhibit grain growth by forming diffusion barriers, additionally impeding the martensitic phase transformation in zirconia grains. Here, alumina-doped zirconia particles with sphere-like shape and average diameters of ∼ 300 n m were synthesized using a modified sol-gel route employing icosanoic acid and hydroxypropyl cellulose as stabilizing agents. The particles were annealed at temperatures between 800 and 1200 ∘ C and characterized by electron microscopy, elemental analysis, and X-ray diffraction. Complementary elemental analyses confirmed the precise control over the alumina content (0–50 mol%) in the final product. Annealed alumina-doped particles showed more pronounced shape persistence after annealing at 1000 ∘ C than undoped particles. Quantitative phase analyses revealed an increased stabilization of the tetragonal/cubic zirconia phase and a reduced grain growth with increasing alumina content. Elemental mapping indicated pronounced alumina segregation near the grain boundaries during annealing.

Excitation Transfer through Quantum Dots Measured by Microluminescence: Dependence on the Quantum Dot Density

2001 ◽  
Vol 187 (1) ◽  
pp. 45-48 ◽  
Author(s):  
F.V. de Sales ◽  
S.W. da Silva ◽  
A.F.G. Monte ◽  
M.A.G. Soler ◽  
M.J. Da Silva ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Excitation Transfer ◽  
Dot Density

An Ivestigation of Temperature-Manipulated Size and Shape Evolution of Preformed Core-Shell Nanoparticles

1999 ◽  
Vol 580 ◽  
Author(s):  
M.M. Maye ◽  
W.X. Zheng ◽  
F.L. Leibowitz ◽  
N.K. Ly ◽  
H.H. Eichelberger ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Ftir Spectroscopy ◽  
Shape Change ◽  
Composite Nanoparticles ◽  
Core Shell ◽  
Shape Evolution ◽  
Shell Nanoparticles ◽  
Size And Shape ◽  
Core Shell Nanoparticles ◽  
Encapsulated Nanoparticles

AbstractThis paper presents a study of heating-induced size and shape change for pre-synthesized composite nanoparticles of ∼2 nm gold cores encapsulated with alkanethiolate monolayers. The results have demonstrated an evolution in size and shape of the nanoparticles towards monodispersed larger core sizes with well-defined and highly-faceted morphologies. The evolved particles were encapsulated with the thiolate shells. The morphological and structural evolutions were characterized using TEM, XRD, UV-Vis and FTIR spectroscopy. While temperature-driven crystal growth is known for non-encapsulated particles, the evolution of the thiolate-encapsulated nanoparticles in solutions into well-defined morphologies represents an intriguing example of temperature manipulations of nanoparticle monodispersity and shape.

Size and shape effects in electromagnetic response of quantum dots and quantum dot arrays

2001 ◽  
Vol 82 (1-3) ◽  
pp. 215-217 ◽  
Author(s):  
S.A Maksimenko ◽  
G.Ya Slepyan ◽  
V.P Kalosha ◽  
N.N Ledentsov ◽  
A Hoffmann ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Electromagnetic Response ◽  
Size And Shape ◽  
Shape Effects

Observation of Continuous and Quantized Domain Size and Shape Evolution in Monolayers at Air–Water Interface

2011 ◽  
Vol 50 (5R) ◽  
pp. 051601 ◽  
Author(s):  
Martin Weis ◽  
Wei Ou-Yang ◽  
Tetsuya Yamamoto ◽  
Yohei Matsuoka ◽  
Takaaki Manaka ◽  
...  
Keyword(s):  
Domain Size ◽  
Shape Evolution ◽  
Water Interface ◽  
Size And Shape ◽  
Air Water Interface
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