Proceedings of the 2nd IEEE Conference on Nanotechnology
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Scanning probe lithography with real time position control interferometer
- Trang 13-15
We have constructed an integrated SPM and an xy-position interferometer to
properly control the dimensions of the lithography patterns. The tracking error
of xy-dimensional positioning system is about 2 nm accuracy and the positioning
resolution could reach 0.1 nm. The scanning probe microscope (SPM) oxidation and
anisotropic tetra-methyl ammonium hydroxide (TMAH) etching were used to produce
smoo...
#Position control #Interferometric lithography #Scanning probe microscopy #Oxidation #Optical interferometry #Atomic force microscopy #Silicon #Prototypes #Laser feedback #Laser stability
The effect of defects of single-walled carbon nanotubes on their hydrogen storage capacity
- Trang 397-399
Hydrogen absorption of single-walled carbon nanotubes synthesized by the HIPCO,
laser ablation, and carbon-arc techniques are evaluated to determine the
influence of their chemical and structural defect density on their effectiveness
as the nanocontainers of hydrogen. The results indicate that although there was
a difference in the defect concentration between the three different SWNT
samples, the...
#Carbon nanotubes #Hydrogen storage #Laser ablation #Temperature #Optical materials #Atomic force microscopy #Inductors #Materials science and technology #Absorption #Chemical lasers
Brownian motor analysis and its application to nanosystems
- Trang 151-155
On the molecular scale biological machines of the size approximately 0.01 /spl
mu/m perform transport guaranteeing functionality of living cells. Thermal and
quantum fluctuations are the major source of energy for such minuscule machines.
They transport biological materials and ions, build proteins, attain motility of
the cell, etc. Fluctuation-driven transport, mapped by the Brownian ratchet
prin...
#Micromotors #Nanobioscience #Cells (biology) #Biological materials #Proteins #Biological system modeling #Fluctuations #Mechanical energy #Biological processes #Analytical models
Extending differential electrophoresis to measure nanoparticle forces
- Trang 343-345
A method is being developed for measuring interparticle forces between
nanoparticles. Previously, the method of differential electrophoresis has been
used to measure forces between micron size particles with different zeta
potentials. The method used video microscopy to measure colloidal trajectories,
and the electrokinetic equations to interpret the forces. The developments that
will enable nanop...
#Electrokinetics #Force measurement #Particle measurements #Size measurement #Nanoparticles #Physics #Atomic measurements #Atomic force microscopy #Equations #Stability
Anomalous mode coupling in guided-wave structures containing metamaterials with negative permittivity and permeability
- Trang 233-234
Summary form only given. The peculiar characteristics of the mode coupling
between standard dielectric waveguides and waveguides formed by a material with
negative index of refraction are presented. Some of our theoretical results,
describing the anti-directional (antiparallel) nature of such coupling, are
shown for the case of the two-parallel-slab geometry.
#Metamaterials #Slabs #Permeability #Permittivity #Electromagnetic coupling #Electromagnetic waveguides #Geometry #Frequency #Electromagnetic refraction #Electromagnetic scattering
A new structure of photonic bandgaps: metamorphosis
- Trang 165-167
Photonic crystals with two different length scales are known to have a simple
scaling property under the interpolation parametrized by a length scale s that
the frequencies of eigenmodes scale by the inverse of s. We found that photonic
crystals can have a nontrivial transformation property of metamorphosis under a
certain interpolation. During the metamorphosis, the first bandgap that is
present ...
#Photonic band gap #Interpolation #Lattices #Photonic crystals #Dielectric constant #Frequency #Lighting control #Geometry #Electrons #Electrostatics
Quantum Monte Carlo simulation of the spectral density within single electron transistors
- Trang 115-117
A quantum Monte-Carlo simulation is made for the symmetric Anderson model. The
Matsubara function is used for the determination of the temporal dependence of
the retarded Green function. The conductance of the single electron transistors
is calculated using a Landauer-type formula.
#Single electron transistors #Quantum dots #Green function #Quantum computing #Tunneling #Voltage control #Temperature dependence #Image analysis #Frequency #Integral equations
Effect of network topology on nanocluster film transport
- Trang 239-242
The effects of network topology on electron transport is studied using Monte
Carlo simulations of tunnel junction networks with transport governed by Coulomb
blockade. Both the threshold voltage shift and the nonlinearity of the I-V
curves are sensitive to lateral fluctuations of the conduction paths due to
random voids. The nonlinearity is found to be maximized for aspect ratios of the
network of...
#Network topology #Gold #Electrons #Threshold voltage #Electrodes #Nanoscale devices #Temperature distribution #Temperature sensors #Temperature dependence #Snow
Tailoring the electromagnetic responses of metamaterials: double negative medium designs and experiments
- Trang 223
Summary form only given. Interest in double negative (DNG) media has arisen from
many proposed microwave and optical applications, including novel imaging and
propagation enhancements. The use of DNG media for ultra-small, efficient
antenna applications has also been proposed. This microwave antenna application
requires micron- and nanosized inclusions to realize a metamaterial that will
exhibit t...
#Metamaterials #Magnetic materials #Permeability #Optical materials #Permittivity #Dielectric materials #Antennas and propagation #Magnetic properties #Optical design #Application software
Evaluation of program, erase and retention times of flash memories with very thin gate dielectric
- Trang 247-250
We have developed a code for the simulation of the complete program and erase
process of a flash EEPROM via direct Fowler-Nordheim tunneling from the channel.
The code is based on the solution of the Poisson-Schrodinger equation in one
dimension, and on the computation of the tunneling current from the detailed
solution of the barrier transmission problem. We are able to compute the
program, erase...
#Dielectrics #Nonvolatile memory #EPROM #Schrodinger equation #Tunneling #Voltage #Flash memory #Design optimization #Electrons #Charge carrier processes