4 research outputs found
A Summary of Methods for Fire Tests of Roof Coverings
AbstractThe testing method about the fire performance of roof covering and materials has not been put into operation in China. This article focuses on two main international testing about fire performance of roof covering and materials, comparing the difference between the two test methods
Zinc Oxide–Zinc Phthalocyanine Interface for Hybrid Solar Cells
The structural, electronic, and optical properties of
a hybrid
interface formed by zinc phthalocyanine (ZnPc) molecules adsorbed
on the (101Ì…0) zinc oxide (ZnO) surface have been investigated
by using <i>ab initio</i> and model potential theoretical
methods. In particular, the attention has been focused on the effects
of molecular assembling on the interface properties by considering
cofacial and planar molecular aggregates on the surface. Present results
show that planar aggregations provide a remarkable molecule-to-surface
electronic coupling which can favor electron injection toward the
substrate. Furthermore, we predict a blue shift of absorption bands
in the case of cofacial aggregation and a red shift in the case of
nanostructured planar J-stripes, which are in agreement with previous
phenomenological models and give a firm theoretical support to observed
relationships between red shift and molecular assembling. All together,
present results indicate that structural and electronic properties
can be achieved in ZnPc-sensitized ZnO surfaces of high potential
interest for improving the efficiency of different kinds of hybrid
photovoltaic cells
Bottom-Up Mechanical Nanometrology of Granular Ag Nanoparticles Thin Films
Ultrathin
metal nanoparticles coatings, synthesized by gas-phase
deposition, are emerging as go-to materials in a variety of fields
ranging from pathogens control and sensing to energy storage. Predicting
their morphology and mechanical properties beyond a trial-and-error
approach is a crucial issue limiting their exploitation in real-life
applications. The morphology and mechanical properties of Ag nanoparticle
ultrathin films, synthesized by supersonic cluster beam deposition,
are here assessed adopting a bottom-up, multitechnique approach. A
virtual film model is proposed merging high resolution scanning transmission
electron microscopy, supersonic cluster beam dynamics, and molecular
dynamics simulations. The model is validated against mechanical nanometrology
measurements and is readily extendable to metals other than Ag. The
virtual film is shown to be a flexible and reliable predictive tool
to access morphology-dependent properties such as mesoscale gas-dynamics
and elasticity of ultrathin films synthesized by gas-phase deposition
Bottom-Up Mechanical Nanometrology of Granular Ag Nanoparticles Thin Films
Ultrathin
metal nanoparticles coatings, synthesized by gas-phase
deposition, are emerging as go-to materials in a variety of fields
ranging from pathogens control and sensing to energy storage. Predicting
their morphology and mechanical properties beyond a trial-and-error
approach is a crucial issue limiting their exploitation in real-life
applications. The morphology and mechanical properties of Ag nanoparticle
ultrathin films, synthesized by supersonic cluster beam deposition,
are here assessed adopting a bottom-up, multitechnique approach. A
virtual film model is proposed merging high resolution scanning transmission
electron microscopy, supersonic cluster beam dynamics, and molecular
dynamics simulations. The model is validated against mechanical nanometrology
measurements and is readily extendable to metals other than Ag. The
virtual film is shown to be a flexible and reliable predictive tool
to access morphology-dependent properties such as mesoscale gas-dynamics
and elasticity of ultrathin films synthesized by gas-phase deposition