Results 51 to 60 of about 218,035 (381)

Photoluminescence Properties of Nanocrystals [PDF]

open access: yesJournal of Nanomaterials, 2012
Photoluminescence (PL) is an optical phenomenon exhibited by some semiconductor materials when excited by an electromagnetic radiation source. After the excitation and recombination processes, these kinds of materials are able to emit photons with less energy than those employed during the electronic excitation.
Cavalcante, Laécio Santos   +5 more
openaire   +2 more sources

Surface Atom Motion to Move Iron Nanocrystals through Constrictions in Carbon Nanotubes under the Action of an Electric Current

open access: yes, 2013
Under the application of electrical currents, metal nanocrystals inside carbon nanotubes can be bodily transported. We examine experimentally and theoretically how an iron nanocrystal can pass through a constriction in the carbon nanotube with a smaller ...
Coh, Sinisa   +4 more
core   +1 more source

Stability of low-friction surface sliding of nanocrystals with rectangular symmetry and application to W on NaF(001) [PDF]

open access: yes, 2010
We investigate the stability of low-friction sliding of nanocrystal with rectangular atomic arrangement on rectangular lattices, for which analytical results can be obtained.
de Wijn, Astrid S., Fasolino, Annalisa
core   +9 more sources

Dynamical Self-assembly during Colloidal Droplet Evaporation Studied by in situ Small Angle X-ray Scattering

open access: yes, 2004
The nucleation and growth kinetics of highly ordered nanocrystal superlattices during the evaporation of nanocrystal colloidal droplets was elucidated by in situ time resolved small-angle x-ray scattering.
B. E. Warren   +6 more
core   +1 more source

The role of quantum-confined excitons vs defects in the visible luminescence of SiO2 films containing Ge nanocrystals [PDF]

open access: yes, 1996
Synthesis of Ge nanocrystals in SiO2 films is carried out by precipitation from a supersaturated solid solution of Ge in SiO2 made by Ge ion implantation. The films exhibit strong room-temperature visible photoluminescence. The measured photoluminescence
Atwater, Harry A.   +5 more
core   +1 more source

Molecular and nanostructural mechanisms of deformation, strength and toughness of spider silk fibrils [PDF]

open access: yes, 2010
Spider silk is one of the strongest, most extensible and toughest biological materials known, exceeding the properties of many engineered materials including steel.
Alberto Redaelli   +4 more
core   +2 more sources

The Preparation and Microstructure of Nanocrystal 3C-SiC/ZrO2 Bilayer Films

open access: yesNanomaterials, 2017
The nanocrystal 3C-SiC/ZrO2 bilayer films that could be used as the protective coatings of zirconium alloy fuel cladding were prepared on a single-crystal Si substrate.
Chao Ye   +6 more
doaj   +1 more source

Effect of the nature of dispersion medium on the CdTe/TGA nanocrystal formation in colloidal solutions and polymeric membranes

open access: yesSemiconductor Physics, Quantum Electronics & Optoelectronics, 2020
In this work, physical and chemical properties of CdTe low-dimensional crystallites obtained by grinding or colloidal synthesis have been investigated. In particular, we have analyzed the photoluminescent characteristics of CdTe nanocrystals stabilized ...
O.A. Kapush   +11 more
doaj   +1 more source

In Situ TEM Study of the Degradation of PbSe Nanocrystals in Air [PDF]

open access: yes, 2018
PbSe nanocrystals have attracted widespread attention due to a variety of potential applications. However, the practical utility of these nanocrystals has been hindered by their poor air stability, which induces undesired changes in the optical and ...
Abelson, Alex   +14 more
core   +11 more sources

Subphthalocyanine-based nanocrystals

open access: yesChemical Communications, 2011
Ultra high vacuum scanning tunnelling microscopy revealed chlorosubphthalocyanine to self-organize into discrete well-defined bilayer and trilayer triangular nanocrystallites when evaporated onto a Cu(111) surface.
Marta Trelka   +13 more
openaire   +4 more sources

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