Results 261 to 270 of about 270,893 (292)

Spectral shifts in metal-enhanced fluorescence

Applied Physics Letters, 2014
We report a 2 nm red shift in the fluorescence spectra observed for Rhodamine 800 dissolved in glycerol on copper substrates as compared to glass reference samples, suggesting a wavelength dependence of metal enhanced fluorescence. The full width half maximum of the blue-red spectra is about 1 nm narrower as compared to the reference sample.
Karolin, Jan, Geddes, Chris
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Wavelength Dependence of Metal-Enhanced Fluorescence

The Journal of Physical Chemistry C, 2009
In this paper, metal-enhanced fluorescence (MEF) from 6-propionyl-2-dimethylaminonaphthalene (Prodan) in different solvents when placed in close proximity to silver island films (SIFs), surface-deposited nanoparticles, is studied. We observe that MEF is wavelength dependent: the enhanced emission of Prodan on SIFs in different solvents changes from 1.5-
Yongxia Zhang, Anatoliy Dragan, Chris D. Geddes   +2 more
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Distance Dependence of Metal-Enhanced Fluorescence

Plasmonics, 2012
In recent years both the mechanism and applications of metal-enhanced fluorescence (MEF) have attracted significant attention, yet many fundamental aspects of MEF remain unanswered or addressed. In this study, we address a fundamental aspect of MEF. Using fluorescein-labeled different length DNA scaffolds, covalently bound to silver nanodeposits, we ...
Anatoliy I. Dragan, Eric S. Bishop, Jose R. Casas-Finet, Robert J. Strouse, James McGivney, Mark A. Schenerman, Chris D. Geddes   +6 more
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Excitation volumetric effects (EVE) in metal-enhanced fluorescence

Physical Chemistry Chemical Physics, 2011
Metal-Enhanced Fluorescence (MEF) effects from different density silver island films (SiFs) and the effects of far-field excitation irradiance on the observed enhancement of fluorescence were studied. It is shown that MEF non-linearly depends on silver nanoparticle (NP) size/density, reaching a maximum value for SiFs made at a deposition time (DT) of ...
A I, Dragan, C D, Geddes
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Metal enhanced fluorescence based on tapered fiber

Asia Pacific Optical Sensors Conference, 2016
Polymer tapered fiber was fabricated by photo-polymerization reaction method, gold nanoparticles and fluorophore were dipped coated on the tapered fiber, compared with fiber coated only with fluorophore this kind of structure can gather more fluorescence.
Fenghong Chu, Jiayan Lu, Fengyu Cheng, Jie Sang, Chengxin Pang, Chunjuan Wei, Wei Jiang, Xiaojun Song   +7 more
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Metal-enhanced fluorescence from tin nanostructured surfaces

Journal of Applied Physics, 2010
The recent surge in interest in the metal-enhanced fluorescence (MEF) phenomenon and its numerous applications in the biosciences has fueled research into identifying alternative metals to silver which have desirable properties, such as enhanced emission and fluorophore photostability.
Zhang, Yongxia, Dragan, Anatoliy, Geddes, Chris   +2 more
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Metal-enhanced fluorescence using aggregated silver nanoparticles

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2014
Abstract A simple strategy to prepare aggregated Ag nanoparticle composites in solution by self-assembly is developed. Sodium citrate is used as the reduction agent to produce negatively charged Ag nanoparticles which are then aggregated using cationic polyacrylamide (PAM) to form self-assembled Ag-PAM microcomposites.
Bihua Xia, Fang He, Lidong Li
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Metal enhanced fluorescence of Ag-nanoshell dimer

Applied Physics A, 2013
The plasmon modes of Ag-nanoshell dimer on metal enhanced fluorescence (MEF) are studied theoretically. The amplified excitation rate of a dimer (two identical Ag nanoshells) illuminated by a plane wave for exciting a molecule located at the gap center is calculated.
Jiunn-Woei Liaw, Huang-Chih Chen, Bae-Renn Chen, Mao-Kuen Kuo   +3 more
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Metal enhanced fluorescence on silver nano-triangles

2010 Photonics Global Conference, 2010
Fluorescence has many desirable applications in analytical tools in the field of biochemistry and molecular biology. In most of the applications the fluorescence is observed in far field and the detection of fluorescence from biological samples demand low concentration and sensitive techniques that can enhance fluorescence signal.
K Ravi Kumar, U. S. Dinish, Chit Yaw Fu, Gopalkrishna Hegde, Malini Olivo, Anand Asundi   +5 more
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Silver nanorod structures for metal enhanced fluorescence

SPIE Proceedings, 2016
ABSTRACT Fluorescence based detection is a commonly used methodology in biotechnology and medical diagnostics. Metal-enhanced fluorescence (MEF) becomes a promising strategy to improve the sensitivity of fluorescence detection, where fluorophores coupling with surface plasmon on metallic structures results fluorescence enhancement.
Mohsin Ali Badshah, Xun Lu, Jonghyun Ju, Seok-min Kim   +3 more
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