8 research outputs found
Improved Dielectric Properties of Polyvinylidene Fluoride Nanocomposite Embedded with Poly(vinylpyrrolidone)-Coated Gold Nanoparticles
A novel nanocomposite
dielectric was developed by embedding polyvinylpyrrolidone (PVP)-encapsulated
gold (Au) nanoparticles in the polyvinylidene fluoride (PVDF) polymer
matrix. The surface functionalization of Au nanoparticles with PVP
facilitates favorable interaction between the particle and polymer
phase, enhancing nanoparticle dispersion. To study the effect of entropic
interactions on particle dispersion, nanocomposites with two different
particle sizes (5 and 20 nm in diameter) were synthesized and characterized.
A uniform particle distribution was observed for nanocomposite films
consisting of 5 nm Au particles, in contrast to the film with 20 nm
particles. The frequency-dependent dielectric permittivity and the
loss tangent were studied for the nanocomposite films. These results
showed the effectiveness of PVP ligand in controlling the agglomeration
of Au particles in the PVDF matrix. Moreover, the study showed the
effect of particle concentration on their spatial distribution in
the polymer matrix and the dielectric properties of nanocomposite
films
Fast, High-Throughput Creation of Size-Tunable Micro/Nanoparticle Clusters via Evaporative Self-Assembly in Picoliter-Scale Droplets of Particle Suspension
We report a fast, high-throughput method to create size-tunable
micro/nanoparticle clusters via evaporative assembly in picoliter-scale
droplets of particle suspension. Mediated by gravity force and surface
tension force of a contacting surface, picoliter-scale droplets of
the suspension are generated from a nanofabricated printing head.
Rapid evaporative self-assembly of the particles on a hydrophobic
surface leads to fast clustering of micro/nanoparticles and forms
particle clusters of tunable sizes and controlled spacing. The evaporating
behavior of the droplet is observed in real-time, and the clustering
characteristics of the particles are understood based on the physics
of evaporative-assembly. With this method, multiplex printing of various
particle clusters with accurate positioning and alignment are demonstrated.
Also, size-unifomity of the cluster arrays is thoroughly analyzed
by examining the metallic nanoparticle cluster-arrays based on surface-enhanced
Raman spectroscopy (SERS)
Fast, High-Throughput Creation of Size-Tunable Micro/Nanoparticle Clusters via Evaporative Self-Assembly in Picoliter-Scale Droplets of Particle Suspension
We report a fast, high-throughput method to create size-tunable
micro/nanoparticle clusters via evaporative assembly in picoliter-scale
droplets of particle suspension. Mediated by gravity force and surface
tension force of a contacting surface, picoliter-scale droplets of
the suspension are generated from a nanofabricated printing head.
Rapid evaporative self-assembly of the particles on a hydrophobic
surface leads to fast clustering of micro/nanoparticles and forms
particle clusters of tunable sizes and controlled spacing. The evaporating
behavior of the droplet is observed in real-time, and the clustering
characteristics of the particles are understood based on the physics
of evaporative-assembly. With this method, multiplex printing of various
particle clusters with accurate positioning and alignment are demonstrated.
Also, size-unifomity of the cluster arrays is thoroughly analyzed
by examining the metallic nanoparticle cluster-arrays based on surface-enhanced
Raman spectroscopy (SERS)
Fast, High-Throughput Creation of Size-Tunable Micro/Nanoparticle Clusters via Evaporative Self-Assembly in Picoliter-Scale Droplets of Particle Suspension
We report a fast, high-throughput method to create size-tunable
micro/nanoparticle clusters via evaporative assembly in picoliter-scale
droplets of particle suspension. Mediated by gravity force and surface
tension force of a contacting surface, picoliter-scale droplets of
the suspension are generated from a nanofabricated printing head.
Rapid evaporative self-assembly of the particles on a hydrophobic
surface leads to fast clustering of micro/nanoparticles and forms
particle clusters of tunable sizes and controlled spacing. The evaporating
behavior of the droplet is observed in real-time, and the clustering
characteristics of the particles are understood based on the physics
of evaporative-assembly. With this method, multiplex printing of various
particle clusters with accurate positioning and alignment are demonstrated.
Also, size-unifomity of the cluster arrays is thoroughly analyzed
by examining the metallic nanoparticle cluster-arrays based on surface-enhanced
Raman spectroscopy (SERS)
Fast, High-Throughput Creation of Size-Tunable Micro/Nanoparticle Clusters via Evaporative Self-Assembly in Picoliter-Scale Droplets of Particle Suspension
We report a fast, high-throughput method to create size-tunable
micro/nanoparticle clusters via evaporative assembly in picoliter-scale
droplets of particle suspension. Mediated by gravity force and surface
tension force of a contacting surface, picoliter-scale droplets of
the suspension are generated from a nanofabricated printing head.
Rapid evaporative self-assembly of the particles on a hydrophobic
surface leads to fast clustering of micro/nanoparticles and forms
particle clusters of tunable sizes and controlled spacing. The evaporating
behavior of the droplet is observed in real-time, and the clustering
characteristics of the particles are understood based on the physics
of evaporative-assembly. With this method, multiplex printing of various
particle clusters with accurate positioning and alignment are demonstrated.
Also, size-unifomity of the cluster arrays is thoroughly analyzed
by examining the metallic nanoparticle cluster-arrays based on surface-enhanced
Raman spectroscopy (SERS)
Fast, High-Throughput Creation of Size-Tunable Micro/Nanoparticle Clusters via Evaporative Self-Assembly in Picoliter-Scale Droplets of Particle Suspension
We report a fast, high-throughput method to create size-tunable
micro/nanoparticle clusters via evaporative assembly in picoliter-scale
droplets of particle suspension. Mediated by gravity force and surface
tension force of a contacting surface, picoliter-scale droplets of
the suspension are generated from a nanofabricated printing head.
Rapid evaporative self-assembly of the particles on a hydrophobic
surface leads to fast clustering of micro/nanoparticles and forms
particle clusters of tunable sizes and controlled spacing. The evaporating
behavior of the droplet is observed in real-time, and the clustering
characteristics of the particles are understood based on the physics
of evaporative-assembly. With this method, multiplex printing of various
particle clusters with accurate positioning and alignment are demonstrated.
Also, size-unifomity of the cluster arrays is thoroughly analyzed
by examining the metallic nanoparticle cluster-arrays based on surface-enhanced
Raman spectroscopy (SERS)
Fast, High-Throughput Creation of Size-Tunable Micro/Nanoparticle Clusters via Evaporative Self-Assembly in Picoliter-Scale Droplets of Particle Suspension
We report a fast, high-throughput method to create size-tunable
micro/nanoparticle clusters via evaporative assembly in picoliter-scale
droplets of particle suspension. Mediated by gravity force and surface
tension force of a contacting surface, picoliter-scale droplets of
the suspension are generated from a nanofabricated printing head.
Rapid evaporative self-assembly of the particles on a hydrophobic
surface leads to fast clustering of micro/nanoparticles and forms
particle clusters of tunable sizes and controlled spacing. The evaporating
behavior of the droplet is observed in real-time, and the clustering
characteristics of the particles are understood based on the physics
of evaporative-assembly. With this method, multiplex printing of various
particle clusters with accurate positioning and alignment are demonstrated.
Also, size-unifomity of the cluster arrays is thoroughly analyzed
by examining the metallic nanoparticle cluster-arrays based on surface-enhanced
Raman spectroscopy (SERS)
Fast, High-Throughput Creation of Size-Tunable Micro/Nanoparticle Clusters via Evaporative Self-Assembly in Picoliter-Scale Droplets of Particle Suspension
We report a fast, high-throughput method to create size-tunable
micro/nanoparticle clusters via evaporative assembly in picoliter-scale
droplets of particle suspension. Mediated by gravity force and surface
tension force of a contacting surface, picoliter-scale droplets of
the suspension are generated from a nanofabricated printing head.
Rapid evaporative self-assembly of the particles on a hydrophobic
surface leads to fast clustering of micro/nanoparticles and forms
particle clusters of tunable sizes and controlled spacing. The evaporating
behavior of the droplet is observed in real-time, and the clustering
characteristics of the particles are understood based on the physics
of evaporative-assembly. With this method, multiplex printing of various
particle clusters with accurate positioning and alignment are demonstrated.
Also, size-unifomity of the cluster arrays is thoroughly analyzed
by examining the metallic nanoparticle cluster-arrays based on surface-enhanced
Raman spectroscopy (SERS)