Proceedings of the 2nd IEEE Conference on Nanotechnology
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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
Surface-mounted thin-film actuators in pointing systems applications
- Trang 465-470
In this paper, high-fidelity modeling, precision positioning, vibration and
disturbance attenuations, as well as tracking control problems for flexible
beams with thin-film PZT actuators are studied. The mathematical models of the
beam are described by partial differential equations. Nonlinear actuator
dynamics are integrated to perform design, and guarantee accurate performance
analysis with outc...
#Transistors #Actuators #Mathematical model #Pi control #Vibration control #Attenuation #Partial differential equations #Performance analysis #Hysteresis #Degradation
Green's function simulation of quantum structures including magnetic field
- Trang 413-416
Practical simulation of quantum structures requires considerable development of
numerical tools and physical models, in order to approach the level of
functionality of established methodologies for classical devices. We have
realized a general procedure for multidimensional nonequilibrium Green's
functions (NEGF) simulation, coupled to a variety of Schrodinger and Poisson
solvers for different app...
#Green's function methods #Magnetic fields #Hall effect #Probes #Multidimensional systems #Quantum mechanics #Magnetic field measurement #Electrons #Voltage #Optical scattering
Self-propelled drop movement by manipulation of nanoscale adsorbates through molecular self-assembly
- Trang 373-376
We examined reactive wetting and transport phenomena of droplets on chemically
patterned surfaces. We employed decahydronaphthalene (DHN) droplets that
contained various amounts of an n-alkylamine to reactively wet and move about
surfaces that expose a dense packing of carboxylic acid functionalities. The
amine compounds adsorb onto this surface and produce one with a lower energy
that exposes met...
#Self-assembly #Gold #Printing #Silicon #Substrates #Chemical engineering #Chemical technology #Microscopy #Fluid flow #Mechanical engineering
Magnetite core-inorganic shell nanoparticles for biomedical applications by novel confined-zone synthesis
- Trang 75-78
The reproducible preparation of homogeneous iron oxide nanoparticles with
particle size diameters less than 5 nm and r.s.d. as low as 17% by a novel
flow-injection synthesis is described. The particles were directly coated with a
layer of amorphous silica with precisely controlled thickness between 4 nm and
20 nm. Thermo-chemical analysis of the particles showed that the silica layer
acts as retar...
#Magnetic confinement #Magnetic cores #Nanoparticles #Silicon compounds #Amorphous magnetic materials #Iron #Amorphous materials #Thickness control #Retardants #Oxidation
Microchip-based optical device for medical diagnostics performed on a single cell
- Trang 133-136
Early detection of changes in nanostructures of a biological cell greatly
improves chances of successful treatment of deadly diseases. There is
considerable dependence of light scattering on intracellular morphology, which
is especially apparent when obtaining measurements over large ranges of
scattering angle. We propose a device for the simultaneous imaging of scattered
light over a wide angular...
#Optical devices #Medical diagnosis #Light scattering #Optical scattering #Nanostructures #Biological cells #Diseases #Morphology #Optical imaging #Testing
Phonon-assisted subband depopulation in semiconductor quantum well laser heterostructures
- Trang 5-8
We study the rate of intersubband electron transitions assisted by LO-phonon
emission in type-II InAs/GaSb DQW heterostructure, which models the active
region of antimonide-based intersubband cascade laser. We show that in type-II
heterostructures with broken-gap band alignment the phonon-assisted process is
the most favorable for the fast depopulation of the lower lasing states. The
main peak of ...
#Quantum well lasers #Semiconductor lasers #Tunneling #Gas lasers #Phonons #Quantum computing #Charge carrier processes #Electrons #Reservoirs #Laser transitions
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
Piconewton regime measurements of biomolecular interactions by nanomechanical force gauge
- Trang 129-132
A piconewton regime measurement of biomolecular interactions in an aqueous
solution by a novel nanomechanical force gauge (NFG) is presented in this paper.
A highly sensitive nanoscale cantilever with a spring constant, which is
thousand times smaller than that of an atomic force microscope (AFM)
microcantilever, is fabricated by a batch process. The NFG has a capability of
direct reading without ...
#Force measurement #Atomic force microscopy #Springs #Atomic measurements #Electrostatic measurements #Stimulated emission #Thickness control #Silicon #Oxidation #Frequency
Effects of sub-gate bias on the operation of Schottky-barrier SOI MOSFETs having nano-scale channel
- Trang 205-208
The characteristics of a novel nano-scale silicon-on-insulator (SOI) device
featuring silicide Schottky source/drain and field-induced S/D extensions
induced by a sub-gate were investigated. The new device exhibits unique and
high-performance bi-channel operation capability. In this work, particular
attention was paid to the effects of subgate bias on the device operation. It is
shown that the app...
#MOSFETs #Nanoscale devices #Fabrication #Voltage #Passivation #Silicides #Annealing #CMOS process #Manufacturing #Contacts