Significant decrease of the optical losses in the coupling between colloidal CdSe/CdS nanocrystals and a flat gold film at cryogenic temperature

2017 ◽  
Vol 96 (19) ◽  
Author(s):  
A. Coste ◽  
F. Eloi ◽  
C. Arnold ◽  
G. Colas des Francs ◽  
X. Quélin ◽  
...  
Keyword(s):  
Cryogenic Temperature ◽  
Gold Film ◽  
Optical Losses ◽  
Cds Nanocrystals

scholarly journals Blinking suppression and biexcitonic emission in thick-shell CdSe/CdS nanocrystals at cryogenic temperature

2014 ◽  
Vol 89 (3) ◽  
Author(s):  
D. Canneson ◽  
L. Biadala ◽  
S. Buil ◽  
X. Quélin ◽  
C. Javaux ◽  
...  
Keyword(s):  
Cryogenic Temperature ◽  
Thick Shell ◽  
Cds Nanocrystals

Plasmon assisted single photon emission of CdSe/CdS nanocrystals deposited on random gold film

2010 ◽  
Vol 97 (5) ◽  
pp. 053109 ◽  
Author(s):  
I. Mallek-Zouari ◽  
S. Buil ◽  
X. Quélin ◽  
B. Mahler ◽  
B. Dubertret ◽  
...  
Keyword(s):  
Gold Film ◽  
Single Photon ◽  
Photon Emission ◽  
Single Photon Emission ◽  
Cds Nanocrystals

scholarly journals Dramatic decrease of Joule losses in the coupling between a crystalline gold film and single colloidal CdSe/CdS nanocrystals at 4 K

2020 ◽  
Vol 101 (7) ◽  
Author(s):  
A. Coste ◽  
L. Moreaud ◽  
G. Colas des Francs ◽  
S. Buil ◽  
X. Quélin ◽  
...  
Keyword(s):  
Gold Film ◽  
Dramatic Decrease ◽  
Cds Nanocrystals

Contrast from epitaxially sandwiched macromolecules

1978 ◽  
Vol 36 (2) ◽  
pp. 226-227
Author(s):  
M. Talianker ◽  
D.G. Brandon
Keyword(s):  
Gold Film ◽  
Lattice Defect ◽  
Gold Foil ◽  
Specimen Preparation ◽  
Preparation Technique ◽  
Resolution Limit ◽  
Transmission Electron ◽  
Crystal Lattice Defect ◽  
Void Effect ◽  
Lattice Resolution

A new specimen preparation technique for visualizing macromolecules by conventional transmission electron microscopy has been developed. In this technique the biopolymer-molecule is embedded in a thin monocrystalline gold foil. Such embedding can be performed in the following way: the biopolymer is deposited on an epitaxially-grown thin single-crystal gold film. The molecule is then occluded by further epitaxial growth. In such an epitaxial sandwich an occluded molecule is expected to behave as a crystal-lattice defect and give rise to contrast in the electron microscope.The resolution of the method should be limited only by the precision with which the epitaxially grown gold reflects the details of the molecular structure and, in favorable cases, can approach the lattice resolution limit.In order to estimate the strength of the contrast due to the void-effect arising from occlusion of the DNA-molecule in a gold crystal some calculations were performed.

Phase Transformation In Ti-6al-4v Alloys

1972 ◽  
Vol 30 ◽  
pp. 584-585
Author(s):  
Shiro Fujishiro
Keyword(s):  
Phase Transformation ◽  
Grain Boundary ◽  
Cryogenic Temperature ◽  
Β Phase ◽  
Heat Treated ◽  
Mixed Microstructure ◽  
Ductile Behavior

The Ti-6 wt.% Al-4 wt.% V commercial alloys have exhibited an improved formability at cryogenic temperature when the alloys were heat-treated prior to the tests. The author was interested in further investigating this unusual ductile behavior which may be associated with the strain-induced transformation or twinning of the a phase, enhanced at lower temperatures. The starting materials, supplied by RMI Co., Niles, Ohio were rolled mill products in the form of 40 mil sheets. The microstructure of the as-received materials contained mainly ellipsoidal α grains measuring between 1 and 5μ. The β phase formed an undefined grain boundary around the a grains. The specimens were homogenized at 1050°C for one hour, followed by aging at 500°C for two hours, and then quenched in water to produce the α/β mixed microstructure.

Optical losses of sputtered Ta2O5 films

1987 ◽  
Vol 48 (7) ◽  
pp. 1155-1159 ◽  
Author(s):  
A. Duparré ◽  
E. Welsch ◽  
H.G. Walther ◽  
H.J. Kühn ◽  
G. Schirmer
Keyword(s):  
Optical Losses

Growth of CdS Nanocrystals within Mesoporous TIO2 Films by using Cadmium Thiolate Derivatives as Unimolecular Precursors

2008 ◽  
Author(s):  
Vincenzo Resta ◽  
Anna Maria Laera ◽  
Maria Cristina Ferrara ◽  
Emanuela Piscopiello ◽  
Saverio Mazzarelli ◽  
...  
Keyword(s):  
Mesoporous Tio2 ◽  
Tio2 Films ◽  
Cds Nanocrystals ◽  
Mesoporous Tio2 Films

Nano-Folded Gold Electrocatalysts Enhance the Selectivity of Carbon Dioxide Reduction

2019 ◽  
Author(s):  
Kam Sang Kwok ◽  
Yuxuan Wang ◽  
Michael Cao ◽  
Hao Shen ◽  
Weinan Xu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Mass Transport ◽  
Gold Film ◽  
X Ray Diffraction ◽  
Thin Gold Film ◽  
Faradaic Efficiency ◽  
X Ray ◽  
Transmission Electron ◽  
Carbon Monoxide Formation ◽  
Catalytic Interfaces

<p>The local structure and geometry of catalytic interfaces can influence the selectivity of chemical reactions. Here, using a pre-strained polymer, we uniaxially compress a thin gold film to form a nano-folded catalyst. We observe two kinds of folds and can tune the ratio of loose to tight folds by varying the extent of pre-strain in the polymer. We characterize the nano-folded catalysts using x-ray diffraction, scanning, and transmission electron microscopy. We observe grain reorientation and coarsening in the nano-folded gold catalysts. Electroreduction of carbon dioxide with these nano-folded catalysts reveals an enhancement of Faradaic efficiency for carbon monoxide formation by a factor of about four. This result suggests that electrolyte mass transport limitations and an increase of the local pH in the tight folds of the catalyst outweigh the effects of alterations in grain characteristics. Together, our studies demonstrate that nano-folded geometries can significantly alter grain characteristics, mass transport, and catalytic selectivity. </p>

Sign in / Sign up

Export Citation Format

Share Document