scholarly journals Templating growth of gold nanostructures with a CdSe quantum dot array

Nanoscale ◽  
2015 ◽  
Vol 7 (21) ◽  
pp. 9703-9714 ◽  
Author(s):  
Neelima Paul ◽  
Ezzeldin Metwalli ◽  
Yuan Yao ◽  
Matthias Schwartzkopf ◽  
Shun Yu ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Self Assembly ◽  
Grazing Incidence ◽  
Gold Nanostructures ◽  
X Ray ◽  
X Ray Scattering ◽  
Gold Sputtering ◽  
Gold Nanostructure ◽  
Time Observation ◽  
Real Time Observation

The controlled gold sputtering on quantum dot arrays forms gold nanostructures exclusively on top of quantum dots by self-assembly. A real time observation of the gold nanostructure growth is enabled with grazing incidence small-angle X-ray scattering (GISAXS).

scholarly journals Nanoparticle crystal formation by solvent-assisted nanoparticle self-assembly probedin situby grazing-incidence small-angle X-ray scattering

2015 ◽  
Vol 71 (a1) ◽  
pp. s391-s391
Author(s):  
Matej Jergel ◽  
Karol Vegso ◽  
Peter Šiffalovič ◽  
Eva Majková ◽  
Adeline Buffet ◽  
...  
Keyword(s):  
Small Angle ◽  
Self Assembly ◽  
Grazing Incidence ◽  
Crystal Formation ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Probing Self-Assembly of Cylindrical Morphology Block Copolymer Using in Situ and ex Situ Grazing Incidence Small-Angle X-ray Scattering: The Attractive Case of Graphoepitaxy

2014 ◽  
Vol 47 (20) ◽  
pp. 7221-7229 ◽  
Author(s):  
Mireille Maret ◽  
Raluca Tiron ◽  
Xavier Chevalier ◽  
Patrice Gergaud ◽  
Ahmed Gharbi ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Small Angle ◽  
Self Assembly ◽  
Grazing Incidence ◽  
Ex Situ ◽  
X Ray ◽  
X Ray Scattering ◽  
Attractive Case ◽  
Ray Scattering

scholarly journals Transmission X-ray scattering as a probe for complex liquid-surface structures

2016 ◽  
Vol 23 (2) ◽  
pp. 519-531 ◽  
Author(s):  
Masafumi Fukuto ◽  
Lin Yang ◽  
Dmytro Nykypanchuk ◽  
Ivan Kuzmenko
Keyword(s):  
Self Assembly ◽  
Functional Materials ◽  
Grazing Incidence ◽  
Spot Size ◽  
X Ray ◽  
X Ray Scattering ◽  
Scanning Transmission ◽  
Water Meniscus ◽  
Liquid Surfaces ◽  
Ray Scattering

The need for functional materials calls for increasing complexity in self-assembly systems. As a result, the ability to probe both local structure and heterogeneities, such as phase-coexistence and domain morphologies, has become increasingly important to controlling self-assembly processes, including those at liquid surfaces. The traditional X-ray scattering methods for liquid surfaces, such as specular reflectivity and grazing-incidence diffraction, are not well suited to spatially resolving lateral heterogeneities due to large illuminated footprint. A possible alternative approach is to use scanning transmission X-ray scattering to simultaneously probe local intermolecular structures and heterogeneous domain morphologies on liquid surfaces. To test the feasibility of this approach, transmission small- and wide-angle X-ray scattering (TSAXS/TWAXS) studies of Langmuir films formed on water meniscus against a vertically immersed hydrophilic Si substrate were recently carried out. First-order diffraction rings were observed in TSAXS patterns from a monolayer of hexagonally packed gold nanoparticles and in TWAXS patterns from a monolayer of fluorinated fatty acids, both as a Langmuir monolayer on water meniscus and as a Langmuir–Blodgett monolayer on the substrate. The patterns taken at multiple spots have been analyzed to extract the shape of the meniscus surface and the ordered-monolayer coverage as a function of spot position. These results, together with continual improvement in the brightness and spot size of X-ray beams available at synchrotron facilities, support the possibility of using scanning-probe TSAXS/TWAXS to characterize heterogeneous structures at liquid surfaces.

scholarly journals Self-assembly of block copolymers under non-isothermal annealing conditions as revealed by grazing-incidence small-angle X-ray scattering

2020 ◽  
Vol 27 (5) ◽  
pp. 1278-1288 ◽  
Author(s):  
Marta Fernández-Regúlez ◽  
Eduardo Solano ◽  
Laura Evangelio ◽  
Steven Gottlieb ◽  
Christian Pinto-Gómez ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Small Angle ◽  
Self Assembly ◽  
Isothermal Annealing ◽  
Grazing Incidence ◽  
The Self ◽  
X Ray ◽  
Annealing Conditions ◽  
X Ray Scattering ◽  
Kinetics Of

An accurate knowledge of the parameters governing the kinetics of block copolymer self-assembly is crucial to model the time- and temperature-dependent evolution of pattern formation during annealing as well as to predict the most efficient conditions for the formation of defect-free patterns. Here, the self-assembly kinetics of a lamellar PS-b-PMMA block copolymer under both isothermal and non-isothermal annealing conditions are investigated by combining grazing-incidence small-angle X-ray scattering (GISAXS) experiments with a novel modelling methodology that accounts for the annealing history of the block copolymer film before it reaches the isothermal regime. Such a model allows conventional studies in isothermal annealing conditions to be extended to the more realistic case of non-isothermal annealing and prediction of the accuracy in the determination of the relevant parameters, namely the correlation length and the growth exponent, which define the kinetics of the self-assembly.

Investigation of CdSe/ZnSSe quantum dot ordering by grazing incidence small angle X-ray scattering

2004 ◽  
Vol 241 (3) ◽  
pp. 523-526 ◽  
Author(s):  
Th. Schmidt ◽  
T. Clausen ◽  
J. Falta ◽  
S. Bernstorff ◽  
G. Alexe ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Small Angle ◽  
Grazing Incidence ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

New Modular Calamitic Ligands for Self-Assembly of Thermostable Quantum Dot Microcapsules via Nematic Templating

2018 ◽  
Author(s):  
Amir Keshavarz ◽  
Sheida Riahinasab ◽  
Linda Hirst ◽  
Ben Stokes
Keyword(s):  
Quantum Dot ◽  
Self Assembly ◽  
Organic Ligands ◽  
Interparticle Spacing ◽  
Design Synthesis ◽  
X Ray ◽  
New Class ◽  
X Ray Scattering ◽  
Synthesis Properties ◽  
And Performance

The design, synthesis, properties, and performance of a new class of promesogenic calamitic side-tethering organic ligands used to direct quantum dot nanoparticle self-assembly via nematic templating are described. This work was motivated by inadequate modularity, step count, and yield associated with syntheses of existing ligands. Attaching the new ligands to quantum dots and dispersing them in a liquid crystal host affords hollow micron-sized capsules via nematic templating. The capsules resist thermal decomposition up to 350 °C — significantly higher than any previously reported microcapsules assembled from side-tethering calamitic ligand-functionalized nanoparticle. Evaluation of the capsules by small-angle X-ray scattering shows that interparticle spacing varies from 10–13 nm depending on the ligand used, and is correlated to aminoalkyl chain length.

New Modular Calamitic Ligands for Self-Assembly of Thermostable Quantum Dot Microcapsules via Nematic Templating

2018 ◽  
Author(s):  
Amir Keshavarz ◽  
Sheida Riahinasab ◽  
Linda Hirst ◽  
Ben Stokes
Keyword(s):  
Quantum Dot ◽  
Self Assembly ◽  
Organic Ligands ◽  
Interparticle Spacing ◽  
Design Synthesis ◽  
X Ray ◽  
New Class ◽  
X Ray Scattering ◽  
Synthesis Properties ◽  
And Performance

The design, synthesis, properties, and performance of a new class of promesogenic calamitic side-tethering organic ligands used to direct quantum dot nanoparticle self-assembly via nematic templating are described. This work was motivated by inadequate modularity, step count, and yield associated with syntheses of existing ligands. Attaching the new ligands to quantum dots and dispersing them in a liquid crystal host affords hollow micron-sized capsules via nematic templating. The capsules resist thermal decomposition up to 350 °C — significantly higher than any previously reported microcapsules assembled from side-tethering calamitic ligand-functionalized nanoparticle. Evaluation of the capsules by small-angle X-ray scattering shows that interparticle spacing varies from 10–13 nm depending on the ligand used, and is correlated to aminoalkyl chain length.

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