8 research outputs found
Growth Mechanism of Microporous Zincophosphate Sodalite Revealed by In Situ Atomic Force Microscopy
Microporous zincophosphate sodalite crystal growth has
been studied
in situ by atomic force microscopy. This simple model system permits
an in depth investigation of some of the axioms governing crystal
growth of nanoporous framework solids in general. In particular, this
work reveals the importance of considering the growth of a framework
material as the growth of a dense phase material where the framework
structure, nonframework cations, and hydrogen-bonded water must all
be considered. The roles of the different components of the structure,
including the role of strict framework ordering, are disentangled,
and all of the growth features, both crystal habit and nanoscopic
surface structure, are explained according to a simple set of rules.
The work describes, for the first time, both ideal growth and growth
leading to defect structures on all of the principal facets of the
sodalite structure. Also, the discovery of the presence of anisotropic
friction on a framework material is described
Growth Mechanism of Microporous Zincophosphate Sodalite Revealed by In Situ Atomic Force Microscopy
Microporous zincophosphate sodalite crystal growth has
been studied
in situ by atomic force microscopy. This simple model system permits
an in depth investigation of some of the axioms governing crystal
growth of nanoporous framework solids in general. In particular, this
work reveals the importance of considering the growth of a framework
material as the growth of a dense phase material where the framework
structure, nonframework cations, and hydrogen-bonded water must all
be considered. The roles of the different components of the structure,
including the role of strict framework ordering, are disentangled,
and all of the growth features, both crystal habit and nanoscopic
surface structure, are explained according to a simple set of rules.
The work describes, for the first time, both ideal growth and growth
leading to defect structures on all of the principal facets of the
sodalite structure. Also, the discovery of the presence of anisotropic
friction on a framework material is described
Growth Mechanism of Microporous Zincophosphate Sodalite Revealed by In Situ Atomic Force Microscopy
Microporous zincophosphate sodalite crystal growth has
been studied
in situ by atomic force microscopy. This simple model system permits
an in depth investigation of some of the axioms governing crystal
growth of nanoporous framework solids in general. In particular, this
work reveals the importance of considering the growth of a framework
material as the growth of a dense phase material where the framework
structure, nonframework cations, and hydrogen-bonded water must all
be considered. The roles of the different components of the structure,
including the role of strict framework ordering, are disentangled,
and all of the growth features, both crystal habit and nanoscopic
surface structure, are explained according to a simple set of rules.
The work describes, for the first time, both ideal growth and growth
leading to defect structures on all of the principal facets of the
sodalite structure. Also, the discovery of the presence of anisotropic
friction on a framework material is described
Growth Mechanism of Microporous Zincophosphate Sodalite Revealed by In Situ Atomic Force Microscopy
Microporous zincophosphate sodalite crystal growth has
been studied
in situ by atomic force microscopy. This simple model system permits
an in depth investigation of some of the axioms governing crystal
growth of nanoporous framework solids in general. In particular, this
work reveals the importance of considering the growth of a framework
material as the growth of a dense phase material where the framework
structure, nonframework cations, and hydrogen-bonded water must all
be considered. The roles of the different components of the structure,
including the role of strict framework ordering, are disentangled,
and all of the growth features, both crystal habit and nanoscopic
surface structure, are explained according to a simple set of rules.
The work describes, for the first time, both ideal growth and growth
leading to defect structures on all of the principal facets of the
sodalite structure. Also, the discovery of the presence of anisotropic
friction on a framework material is described
Growth Mechanism of Microporous Zincophosphate Sodalite Revealed by In Situ Atomic Force Microscopy
Microporous zincophosphate sodalite crystal growth has
been studied
in situ by atomic force microscopy. This simple model system permits
an in depth investigation of some of the axioms governing crystal
growth of nanoporous framework solids in general. In particular, this
work reveals the importance of considering the growth of a framework
material as the growth of a dense phase material where the framework
structure, nonframework cations, and hydrogen-bonded water must all
be considered. The roles of the different components of the structure,
including the role of strict framework ordering, are disentangled,
and all of the growth features, both crystal habit and nanoscopic
surface structure, are explained according to a simple set of rules.
The work describes, for the first time, both ideal growth and growth
leading to defect structures on all of the principal facets of the
sodalite structure. Also, the discovery of the presence of anisotropic
friction on a framework material is described
Growth Mechanism of Microporous Zincophosphate Sodalite Revealed by In Situ Atomic Force Microscopy
Microporous zincophosphate sodalite crystal growth has
been studied
in situ by atomic force microscopy. This simple model system permits
an in depth investigation of some of the axioms governing crystal
growth of nanoporous framework solids in general. In particular, this
work reveals the importance of considering the growth of a framework
material as the growth of a dense phase material where the framework
structure, nonframework cations, and hydrogen-bonded water must all
be considered. The roles of the different components of the structure,
including the role of strict framework ordering, are disentangled,
and all of the growth features, both crystal habit and nanoscopic
surface structure, are explained according to a simple set of rules.
The work describes, for the first time, both ideal growth and growth
leading to defect structures on all of the principal facets of the
sodalite structure. Also, the discovery of the presence of anisotropic
friction on a framework material is described
Growth Mechanism of Microporous Zincophosphate Sodalite Revealed by In Situ Atomic Force Microscopy
Microporous zincophosphate sodalite crystal growth has
been studied
in situ by atomic force microscopy. This simple model system permits
an in depth investigation of some of the axioms governing crystal
growth of nanoporous framework solids in general. In particular, this
work reveals the importance of considering the growth of a framework
material as the growth of a dense phase material where the framework
structure, nonframework cations, and hydrogen-bonded water must all
be considered. The roles of the different components of the structure,
including the role of strict framework ordering, are disentangled,
and all of the growth features, both crystal habit and nanoscopic
surface structure, are explained according to a simple set of rules.
The work describes, for the first time, both ideal growth and growth
leading to defect structures on all of the principal facets of the
sodalite structure. Also, the discovery of the presence of anisotropic
friction on a framework material is described
Atomic Force Microscopy and High Resolution Scanning Electron Microscopy Investigation of Zeolite A Crystal Growth. Part 2: In Presence of Organic Additives
The nanoscopic details of the crystal
growth of zeolite A in the
presence of the organic modifiers diethanolmaine (DEA) and triethanolamine
(TEA) has been determined using a combination of atomic force microscopy
(AFM) and high-resolution scanning electron microscopy (HRSEM) coupled
with Monte Carlo simulations. Crystallization of zeolite A in the
presence of TEA was faster than when the growing solution contained
DEA. In addition, the morphology of the final zeolite A crystals depended
on the type of organic molecule, with TEA producing crystals bound
only by {100} facets and DEA leading to the formation of relatively
large {110} faces. These features can be explained in terms of the
relative Si/Al in the growing medium and its control due to the different
affinity of the organic molecules to Al. In addition, synthesis performed
at 90 °C showed the appearance of {211} facets. Careful review
of the HRSEM and AFM images, in addition to comparison with the MC
simulations, reveals that these are in fact pseudofacets, products
of the slow dissolution of the metastable zeolite A crystals. This
proves that the final habit of the LTA crystals can be governed by
very small changes in saturation of the growing medium, and control
of this parameter can prove advantageous when designing crystals for
industrial applications