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2009 NCKU Research Express
Controlling
pre-tilt angles of liquid crystal
using mixed polyimide alignment
layer Andy
Y.-G. Fuh
In liquid crystal displays (LCDs), a
uniform LC pre-tilt angle is very
important for the proper functioning
of the display, because it has a
marked influence on the display
quality and the response time of LCD
devices. In addition, a nonzero
pre-tilt angle is required to avoid
the formation of the reverse tilt
domains (Fig 1.). …
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The
phase-response effect of
size-dependent optical enhancement
in a single nanoparticle
Hsiang-Chen
Chui
With the rapid advance of
nanophotonics, the optical effects
of metal nanoparticles, such as
surface plasmonic resonance (SPR),
surface enhanced Raman scattering (SERS),
are always attractive for basic
phsyics and a lot of applications.
Here, we tried to analyze near-field
phase-response in a single silver
nanoparticle (NP), a pair of NP, and
extending to nanostructure. It is
well-known that …
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Influence of Electric Field on
Microstructures of Pentacene Thin
Films in Field-Effect Transistors
Horng-Long
Cheng
Today organic semiconductors are
being increasingly used as active
elements in optoelectronic devices,
such as field-effect transistors (FETs),
light-emitting diodes, solar cells,
sensors, switches and others
devices. Electronic stability of
organic thin-film devices is an
important factor, regardless of the
field of application. There exist
considerable challenges on the way
of improving …
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Fluorescein As a Versatile Tag for
Enhanced Selectivity in Analyzing
Cysteine-containing
Proteins/Peptides Using Mass
Spectrometry
Shu-Hui
Chen
Sample complexity and wide dynamic
range are big challenges in
proteomic analysis. Many techniques
including multidimensional protein
identification technology (MudPIT)
and affinity selection of specific
targets or residues such as
immobilized metal ion affinity
chromatography (IMAC) for
phosphoproteome, lectin affinity for
glycoproteins, covalent
chromatography for cystein-containing
peptides, …
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Tunable
grating based on stressed liquid
crystal
Andy
Ying-Guey Fuh
It is known that a typical
grating can diffract an incident
light into various-order beams.
Gratings based on liquid crystal
(LC) have attracted considerable
interest owing to their high
birefringence and sensitivity to an
applied field, and possess
considerable potential for
application in displays, photonics
and optical communications. In this
paper, we report a new LC grating
using the newly developed stressed
liquid crystals (SLCs). …
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Modulation effects on Landau levels
in a monolayer graphene
Ming-Fa
Lin
Recently, the discovery of few-layer
graphenes [1, 2] has
inspired considerable theoretical
and experimental studies in
condensed-matter physics and
material science. Both monolayer and
bilayer systems are demonstrated to
exhibit exotic integer quantum Hall
effects [3,4], which owe
its origin from their unusual
quasiparticles described
relativistically by Dirac equation.
…
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High-Speed
GaN-based Green Light Emitting Diodes with
Partially n-doped Active Layers and
Current-Confined Apertures
Jinn-Kong Sheu
High-speed red light-emitting diodes (LEDs)
often serve as key transmitter components
for communication networks using plastic
optical fibers (POFs). According to the
media-oriented systems transport (MOST)
standard they must run at a data rate of
22.5Mb/s. However, the optical bandwidth of
the red operating window (~650nm) of the
current commercially used
polymethylmethacrylate (PMMA) POF is …
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The Gd2O(CO3)2•H2O
Particles and their
Corresponding Gd2O3:
Synthesis and
Applications of MR
Contrast Agents and
Template Particles
for Hollow Spheres
and Hybrid
Composites
Chen-Sheng Yeh
Recently, research
has been centred on
the fabrication of
the multifunctional
inorganic-based
particulate agents
for in vitro
and in vivo
biomedical
applications. The
non-invasive MRI,
recognized as
harmless to the
body, provides
anatomical details
in diagnosis and
offers highly
resolved contrast.
Currently, MR
contrast agents are
categorized into T1-positive
agents of …
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Optically
controllable
transflective
spatial filter with
high- and low-pass
or notch- and
band-pass functions
based on a dye-doped
cholesteric liquid
crystal film
Chia-Rong Lee
 The optical
information
processing
using
optical
Fourier
transform
(OFT)
technique
has
continually
attracted
much
attention in
the re-cent
two decades
since it has
many
potential
applications
in character
recognition,
edge
enhancement,
image
addition-subtraction,
image
correlation,
medical
image
processing,
and
controllable
spatial
filter-ing.
This study
utilized the
photoisomerization-induced
…
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Generation
of vortex beams from lasers with controlled
Hermite- and Ince-Gaussian modes
Shu-Chun Chu
Researchers have widely used optical
vortex beams, which are optical beams
that have phase singularities mixed with
wavefront curvature, in the study of
optical tweezers, trapping and guiding
of cold atoms, and entanglement states
of photons. Optical vortex beams have
been reported to be created by passing
HGM beams through spiral phase-plates,
computer-generated holographic
converters, or ...
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Innovative Plasma
Alignment Method in Flexible Liquid Crystal
Display
Wei-Yang Chou
Thinner and more flexible monitors with
bendable frames can become popular in
the next generation of flat-panel
displays. Conventional displays are
fairly rigid and therefore more
susceptible to damage, while flexible
displays are lighter and more durable,
and thus have better mobility and longer
life. Hence, a substrate of
plastic/polymer films or other bendable
materials can be used instead of ...
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Electrochemical study
of copper in the 1-ethyl-3-methylimidazolium
dicyanamide room temperature ionic liquid
I-Wen Sun
Room temperature ionic liquids (ILs)
obtained from the combination of
anhydrous aluminum chloride and
1-ethyl-3-methylimidazolium chloride (EMIC)
have been extensively studied as the
electrolytes for various electrochemical
applications such as high efficiency
batteries and electroplating. Numerous
examples on the use of chloroaluminate
ILs for the electrodeposition of single
metals and ...
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Long-Term Hydrophilic
Modifications on PDMS Substrate for the
Fabrication of Protein Antibody Chips
Shu-Hui Chen
Poly(dimethylsiloxane) (PDMS) possesses
many advantages, like high optical
transparency, biocompatibility, chemical
stability and high oxygen permeability,
which makes it an attractive material.
This has resulted in many applications
of this material in biological and
chemical analysis. Unlike other polymer
substrates, the PDMS surface can be
easily and directly activated by
exposure to energy ...
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Magnetic and quantum
confinement effects on optical properties of
1D graphene ribbons
Min-Fa Lin
A 1D graphene ribbon is an elongated
carbon strip along the transversal (x)
direction and with the finite width in
the longitudinal (y) direction.
Electrons propagate along the x
direction, while their motion is
confined in the y direction. The
electronic properties show 1D
characteristics. Moreover, the ribbon
edges have a significant effect on the
...
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Fabrication of
Pseudoboehmite and Alumina: Effects of Water
and 1-Hexadecyl-2,3-dimethyl-imidazolium
Chloride
Jong-Liang Lin
A porous material is a material
containing pores. According to the pore
diameter (ф), porous materials are
classified into three categories, i.e.,
microporous (ф < 2 nm), mesoporous (2 nm
< ф < 50 nm) and macroporous (ф > 50 nm)
materials. Ordered, porous oxides were
first demonstrated by the successful
syntheses of aluminosilicate and silica
with hexagonal pore array in 1992 [1].
The key step ...
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Dinuclear
Oxovanadium(IV) Thiolate Complexes with
Ferromagnetically Coupled Interaction
between Vanadium Centers
Hua-Fen Hsu
Our interest in studying vanadium
chemistry is motivated from its
important roles in biological systems
and its medical application.
Particularly, the interaction of high
valent vanadium species with
sulfur-containing bioligands such as
cysteine and glutathione is relevant to
the PTP inhibition by vanadate, the
antidiabetic behavior of vanadium
compounds, the redox conversion of
vanadium in ...
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Observation of Retardation
Effect via Current Noise
Yueh-Nan Chen
The question on the
speed of light had long been an important issue for both
scientists and philosophers. Kepler and Descartes thought
that the speed of light is infinite, while Galileo thought
its speed is finite. Of course, we now all know that the
speed of light is roughly equal to 3×108 m/s.
But, in experiment, how the light speed is measured? The
first attempt was made by ...
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Flavors
and Phases in Unparticle Physics
Chuan-Hung Chen
Recently, it has
been argued in Georgi’s paper that a scale invariant sector
with scale dimension dU is associated with
“unparticle stuff” which looks like a non-integral number dU
of invisible particles. The production of unparticles might
be detectable by measuring the missing energy and momentum
distributions in various processes. Although it is still
unclear how far the unparticle physics ...
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f0
(1710) production in exclusive B decays
Chuan-Hung Chen
Subatomic particles,
such as proton and neutron etc, are well known not fundamental
particles and consists of quarks which at present are regarded
as elementary particles in our universe. We now know that the
interactions to hold the quarks together to form a proton are
called strong interactions. The interacting procedure is through
exchange gluons which are dictated by ...
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A Legendre
Pseudospectral Scheme for 2D Isotropic Elastic Wave Computations
Chun-Hao Teng
Elastic wave
simulations have important applications in many scientific
fields and advance technologies, for instance seismic
science, microelectronics and material property detection.
In tradition these simulations are based on finite
difference and finite element methods of low-order accuracy.
Due to the rapid progress in science and technology, the
complexity involved in elastic wave problems ...
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Electrically-controllable and polarization-independent Fresnel
lens based on a circularly-symmetric hybrid-aligned liquid
crystal film with a photoconductive polymer layer
Chia-Rong Lee
Many Fresnel lenses
have been developed for various fields, including photonics,
optical communication, space navigation and optical imaging
in recent years. Traditional Fresnel lenses are fabricated
by electron-beam writing or thin film deposition and have
certain limitations, including static focusing feature.
Controllable Fresnel lenses with programmable focusing,
based on flexibly governable ...
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Stabilizer-free
poly(lactide-co-glycolide) nanoparticles for multimodal
biomedical probes
Chen-Sheng Yeh
Poly(D,L-lactide-co-glycolide) (PLGA) polymers, approved by
the U. S. Food and Drug Administration (FDA), have attracted
significant interest for tissue engineering applications and
delivery system because they are less toxic, biodegradable
and biocompatible. More importantly, the by-products of PLGA,
the lactic acid and glycolic acid, can be eliminated from
the body as carbon dioxide and water ...
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Isolation and
Study of Antiplatelet Aggregatory Principles from the Leaves of
Piper lolot
Tian-Shung Wu
The blood platelet
in the blood normal function plays one of major factors. If
the blood platelet function were exceptionally, the presence
of a thrombus in an artery providing blood to the heart is
the most common cause of acute coronarysyndromes such as
myocardial infarction and angina. According to the studies,
many medium from intercellular space, especially lipid
metabolites like arachidonic ...
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Doubly dressed states in a
ladder-type system with electromagnetically
induced transparency
Chin-Chun Tsai
In the
early 20th century scientists
developed a complete mechanics--Quantum
Mechanics. In quantum mechanics, a physical
system is described using eigenfunctions or
states by solving the corresponding Hamiltonian.
The experimental measurement is the result of
the corresponding (the operator) probability or
expectation value. Quantum mechanics is
essential to understand the behavior of ...
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Numerical study for
selective excitation of Ince-Gaussian modes
in end-pumped solid-state lasers
Shu-Chun Chu
Researchers have recently predicted a
third complete family of transverse
modes, PWE solutions in elliptic
cylindrical coordinates, namely the Ince-Gaussian modes (IGMs), which
constitute the continuous transition
modes between Hermite-Gaussian modes (HGMs)
and Laguerre-Gaussian modes (LGMs). IGMs
are recently observed in a LD-pumped
solid-state laser by breaking the
symmetry of the ...
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Electrically
switchable and optically rewritable
reflective Fresnel zone plate in dye-doped
cholesteric liquid crystals
Andy Y.-G. Fuh
Lenses based on binary-type Fresnel
zones are called Fresnel lenses. The
Fresnel zones are formed by concentric
circles in such a way that the radius rm
of the mth zone satisfies ,
where is the radius of the innermost
zone. Obstructing the odd zones (or even
zones) of the Fresnel zones, we get the
Fresnel zone plate, which can function
as a lens with the primary focal ...
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Non-Markovian
entanglement dynamics of noisy continuous
variable quantum channels
Wei-Min Zhang
Quantum teleportation and quantum
cryptography incorporating the classical
communication theory with quantum
entanglement has received tremendous
attention in the study of quantum
communication in the past decade. In
quantum teleportation as well as some
quantum cryptography protocols, a
necessary ingredient is the quantum
channel which is realized through an
entangled quantum state of two ...
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