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Contributors
Kocabaş, Coşkun
Subwavelength surface plasmon interferometer for high-throughput sensing
Publisher
Bilkent University
Description
Ankara : The Department of Physics and the Graduate School of Engineering and Science of Bilkent University, 2012. Thesis (Master's) -- Bilkent University, 2012. Includes bibliographical references leaves 52-56. Small detection volume, increased analysis speed and reduced cost are the main
driving forces for miniaturized lab-on-a-chip systems. Subwavelength holes on
opaque metal films provide a unique configuration for miniaturized sensors.
Transmitted light through these tiny holes is governed by the electronic resonance
on the surface of the metal film. Excitation of surface plasmon-polaritons (SPPs)
on the metal-dielectric interface characterizes the resonance condition. The
sensitive dependence of the plasmon resonance condition on the dielectric
constant of the medium is used for label free sensing applications. In this thesis,
we demonstrate a refractive index sensor based on a subwavelength plasmon
interferometer using monochromatic light. Very high contrast fringe pattern is
generated by the plasmon interferometer that consists of a sub-wavelength slitgroove
pair with a small angle between them. The small angle between the groove
and the slit provides spatially varying slit-groove distance which generates a highcontrast
interference pattern. By interrogating the relative position of interference
fringes, one can determine the refractive index of the dielectric medium on the
metal surface. The presented plasmon interferometer provides a practical yet
sensitive refractive index measurement scheme with very small detection volume. Yavaş, Özlem
Excerpt:
surface plasmon resonance sensors
by
Iwanaga, Masanobu, author.
QC176.8 .P55 I93 2016
Format:
Excerpt:
Surface plasmon resonance.
by
Atar, Fatih Bilge.
QC176.8.P55 A83 2015
The Graduate School of Engineering and Science of Bilkent University,
Format:
Excerpt:
Surface plasmon resonance.
by
Schasfoort, R. B. M. (Richard B. M.)
QC176.8 .P55 2008
Royal Society of Chemistry,
Format:
Excerpt:
Handbook of surface plasmon resonance Schasfoort, R. B. M. (Richard B. M.)
Assembly Kinetics of Nanocrystals via Peptide Hybridization
Publisher
American Chemical Society
Description
Cataloged from PDF version of article. The assembly kinetics of colloidal semiconductor quantum dots (QDs) on solid inorganic surfaces is of fundamental importance for implementation of their solid-state devices. Herein an inorganic binding peptide, silica binding QBP1, was utilized for the self-assembly of nanocrystal quantum dots on silica surface as a smart molecular linker. The QD binding kinetics was studied comparatively in three different cases: first, QD adsorption with no functionalization of substrate or QD surface; second, QD adsorption on QBP1-modified surface; and, finally, adsorption of QBP1-functionalized QD on silica surface. The surface modification of QDs with QBP1 enabled 79.3-fold enhancement in QD binding affinity, while modification of a silica surface with QBP1 led to only 3.3-fold enhancement. The fluorescence microscopy images also supported a coherent assembly with correspondingly increased binding affinity. Decoration of QDs with inorganic peptides was shown to increase the amount of surface bound QDs dramatically compared to the conventional methods. These results offer new opportunities for the assembly of QDs on solid surfaces for future device applications.
Excerpt:
Surface-plasmon Resonance
Nanofabrication and plasma polymerization assisted surface modification of a transducer based on localized surface plasmon resonance of gold nanostructure arrays for biosensor applications
Publisher
Society of Photo-optical Instrumentation Engineers
Description
Cataloged from PDF version of article. The nanofabrication and surface modification of a transducer based on localized surface plasmon resonance (LSPR) of gold nanostructure arrays for biosensing was studied. We used electron beam lithography for the nanopatterning technique, which let us choose LSPR sensor properties by providing immense control over nanostructural geometry. A critical step in the utilization of this transducer is to form a selective biolayer over the gold nanostructures. We applied plasma polymerization and wet chemistry techniques for ethylenediamine (EDA) modification and glutaraldehyde immobilization as intermediate layers, respectively. The gold nanostructure arrays were primarily modified using EDA in order to activate the surface with amine groups that are cross-linked with later added avidin molecules by the help of glutaraldhyde layer residing in between. The success of plasma polymerization was validated with x-ray photoelectron spectroscopy measurements. As a last step, we introduced biotin to the surface (biotin has a high affinity for avidin). We were able to detect the LSPR resonance wavelength shift in the transmission spectra at each step of modification, including the avidin-biotin interaction, which acts as a model for specific molecule detection using LSPR. (C) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE).
Excerpt:
localized surface plasmon resonance of gold nanostructure arrays for biosensor applications Turhan, A. B.
A microfluidic based differential plasmon resonance sensor
Publisher
Elsevier
Description
Cataloged from PDF version of article. A new type of differential surface plasmon (SPR) sensor integrated with a microfluidic system is presented. The working principle of the microfluidic device is based on hydrodynamic modulation of two laminar streams inside a microchannel to provide periodic changes of the environment on the SPR sensor. The modulated reflectance is then demodulated using a lock-in amplifier. The presented sensor provides sensitivities of index of refraction about 4 x 10(-8) RIU together with a 4 orders of magnitude dynamic range. This method demonstrates a sensitive detection scheme which could be used for label-free detection. (C) 2011 Elsevier B.V. All rights reserved.
Excerpt:
Surface Plasmon Resonance Sensor
by
Li, Er-Ping, author.
TK7874.84 .L5 2014
Format:
Excerpt:
Surface plasmon resonance.
Tunable surface plasmon resonance on an elastomeric substrate
Publisher
Optical Society of America Publishing
Description
Cataloged from PDF version of article. In this study, we demonstrate that periods of metallic gratings
on elastomeric substrates can be tuned with external strain and hence are
found to control the resonance condition of surface plasmon polaritons.
We have excited the plasmon resonance on the elastomeric grating coated
with gold and silver. The grating period is increased up to 25% by applying
an external mechanical strain. The tunability of the elastomeric substrate
provides the opportunity to use such gratings as efficient surface enhanced
Raman spectroscopy substrates. It’s been demonstrated that the Raman
signal can be maximized by applying an external mechanical strain to the
elastomeric grating.
© 2009 Optical Society of America
Excerpt:
Tunable surface plasmon resonance on an elastomeric substrate Olcum, S.
by
Chon, James W. M., editor of compilation.
TK7874.84 .N383 2014
Format:
Excerpt:
Surface plasmon resonance.
by
Chon, James W. M., editor of compilation.
TK7874.84 .N383 2014
Format:
Excerpt:
Surface plasmon resonance.
by
Klimov, V. V. (Vasilii? Vasil'evich), doktor fiziko-matematicheskikh nauk, author.
QC176.8 .P55 K55 2013
Format:
Excerpt:
Surface plasmon resonance.
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