Papers by François Reincke
Ten variations on the song "Uninvited" by Alanis Morissette. This was an exercise by me to see in... more Ten variations on the song "Uninvited" by Alanis Morissette. This was an exercise by me to see in how may directions I could take this theme. As it turns out... It's quite a few ways.
A bagatelle (= trifle) for two flutes.
My piano teacher challenged me to write a passacaglia around a descending chromatic scale.
My piano teacher challenged me to write a passacaglia based around an ascending scale.
An piano exercise based on major sevenths.
A fugue based on a theme of a Dutch children's show.
Atmospheric piece of a lone person contemplating his/her life in a dimly lit room. The clock near... more Atmospheric piece of a lone person contemplating his/her life in a dimly lit room. The clock nearly strikes twelve.
Sad piece for choir (sporano & baritone) and piano. A person is trying to comfort a friend who's ... more Sad piece for choir (sporano & baritone) and piano. A person is trying to comfort a friend who's girlfriend has left him: "Life is rough, but spring is coming."
We present a thermodynamic evaluation of the self-assembly of charged nanometer-sized particles
... more We present a thermodynamic evaluation of the self-assembly of charged nanometer-sized particles
at the water/oil interface. The chemical potentials of the nanoparticles in the bulk (aqueous)
phase and at the water/oil interface are calculated taking into account interfacial energies, van der
Waals interactions, and electrostatic repulsions. An isotherm of the interfacial particle density as
a function of the surface charge density on the particles is obtained and compared with
experimental results on gold and CdTe nanoparticles self-assembled at the water/heptane
interface. Our model provides a semi-quantitative explanation for the spontaneous self-assembly
of several types of metallic and semiconducting charged nanoparticles upon reduction of their
surface charge.
Cover: Photographic image of charge-stabilised colloidal gold solutions in water. The diameter of... more Cover: Photographic image of charge-stabilised colloidal gold solutions in water. The diameter of the particles ranges from 4.5 nm (left vial) to several hundred nanometers (right vial). For more information see chapter 2, section 2.2.
Self-assembled monolayers (SAMs) of functionalized oligo(cyclohexylidene) molecules on gold(111) ... more Self-assembled monolayers (SAMs) of functionalized oligo(cyclohexylidene) molecules on gold(111) surfaces have been studied by measurement of the interfacial capacitance in concentrated electrolyte solutions and by cyclic voltammetry with Fe(CN)6 3 −/4− as the redox system. The morphology of the layers has been studied by scanning tunneling microscope (STM) and AFM. We found that sulfide-terminated oligo(cyclohexylidenes) form a well-ordered SAM on gold(111) and that the oxime end-functionality inhibits the formation of ordered SAMs. Charge-stabilized gold nanocrystals attach to sulfide-terminated SAMs on gold(111) to form robust gold(111) _ oligo(cyclohexylidene) _ gold nanocrystal molecular junctions. We show that the nanocrystal _ water interface can be charged by electron transport through the molecular layer.
Novel materials based on 2D and 3D arrays of nanocrystalline
building blocks can be prepared fro... more Novel materials based on 2D and 3D arrays of nanocrystalline
building blocks can be prepared from colloidal suspensions by
controlled processing. There is a large effort in this field due
to the exciting electrical, magnetic and optical
properties of such systems, which can be tuned by the size
of the building blocks and the interactions between them.
Ordered arrays of uncharged, sterically stabilized nanocrystals
have been successfully obtained by a subtle destabilization
of the suspension or by assembly at a liquid/air or
liquid/liquid interface. There is, however, an important
class of suspensions that are stable owing to the nanocrystal
surface charge. Assembly of uncapped, charged nanocrystals
into arrays is considerably more difficult as destabilization of
a suspension usually leads to uncontrolled coagulation.
Herein, we report surprising results that may lead to novel
routes for the controlled fabrication of materials from chargestabilized
nanocrystal colloids. We have observed that gold
nanocrystals spontaneously form a monolayer at the water/oil
interface if the surface charge of the nanocrystals is gradually
reduced. The separation between the nanocrystals in the layer
is smaller than the width of the diffuse electrical double layer.
Nevertheless, coagulation of the particles into clumps does
not occur. The monolayers are remarkably robust and can be
easily transferred to substrates, opening the way to technological
applications. The spontaneous 2D assembly of charged
nanocrystals is qualitatively described in terms of a reduction
of the water/oil interfacial energy upon particle adsorption
counteracted by electrostatic repulsion in the film.
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Papers by François Reincke
at the water/oil interface. The chemical potentials of the nanoparticles in the bulk (aqueous)
phase and at the water/oil interface are calculated taking into account interfacial energies, van der
Waals interactions, and electrostatic repulsions. An isotherm of the interfacial particle density as
a function of the surface charge density on the particles is obtained and compared with
experimental results on gold and CdTe nanoparticles self-assembled at the water/heptane
interface. Our model provides a semi-quantitative explanation for the spontaneous self-assembly
of several types of metallic and semiconducting charged nanoparticles upon reduction of their
surface charge.
building blocks can be prepared from colloidal suspensions by
controlled processing. There is a large effort in this field due
to the exciting electrical, magnetic and optical
properties of such systems, which can be tuned by the size
of the building blocks and the interactions between them.
Ordered arrays of uncharged, sterically stabilized nanocrystals
have been successfully obtained by a subtle destabilization
of the suspension or by assembly at a liquid/air or
liquid/liquid interface. There is, however, an important
class of suspensions that are stable owing to the nanocrystal
surface charge. Assembly of uncapped, charged nanocrystals
into arrays is considerably more difficult as destabilization of
a suspension usually leads to uncontrolled coagulation.
Herein, we report surprising results that may lead to novel
routes for the controlled fabrication of materials from chargestabilized
nanocrystal colloids. We have observed that gold
nanocrystals spontaneously form a monolayer at the water/oil
interface if the surface charge of the nanocrystals is gradually
reduced. The separation between the nanocrystals in the layer
is smaller than the width of the diffuse electrical double layer.
Nevertheless, coagulation of the particles into clumps does
not occur. The monolayers are remarkably robust and can be
easily transferred to substrates, opening the way to technological
applications. The spontaneous 2D assembly of charged
nanocrystals is qualitatively described in terms of a reduction
of the water/oil interfacial energy upon particle adsorption
counteracted by electrostatic repulsion in the film.
at the water/oil interface. The chemical potentials of the nanoparticles in the bulk (aqueous)
phase and at the water/oil interface are calculated taking into account interfacial energies, van der
Waals interactions, and electrostatic repulsions. An isotherm of the interfacial particle density as
a function of the surface charge density on the particles is obtained and compared with
experimental results on gold and CdTe nanoparticles self-assembled at the water/heptane
interface. Our model provides a semi-quantitative explanation for the spontaneous self-assembly
of several types of metallic and semiconducting charged nanoparticles upon reduction of their
surface charge.
building blocks can be prepared from colloidal suspensions by
controlled processing. There is a large effort in this field due
to the exciting electrical, magnetic and optical
properties of such systems, which can be tuned by the size
of the building blocks and the interactions between them.
Ordered arrays of uncharged, sterically stabilized nanocrystals
have been successfully obtained by a subtle destabilization
of the suspension or by assembly at a liquid/air or
liquid/liquid interface. There is, however, an important
class of suspensions that are stable owing to the nanocrystal
surface charge. Assembly of uncapped, charged nanocrystals
into arrays is considerably more difficult as destabilization of
a suspension usually leads to uncontrolled coagulation.
Herein, we report surprising results that may lead to novel
routes for the controlled fabrication of materials from chargestabilized
nanocrystal colloids. We have observed that gold
nanocrystals spontaneously form a monolayer at the water/oil
interface if the surface charge of the nanocrystals is gradually
reduced. The separation between the nanocrystals in the layer
is smaller than the width of the diffuse electrical double layer.
Nevertheless, coagulation of the particles into clumps does
not occur. The monolayers are remarkably robust and can be
easily transferred to substrates, opening the way to technological
applications. The spontaneous 2D assembly of charged
nanocrystals is qualitatively described in terms of a reduction
of the water/oil interfacial energy upon particle adsorption
counteracted by electrostatic repulsion in the film.