scholarly journals Plasmon-Controlled Fluorescence Towards High-Sensitivity Optical Sensing

2008 ◽  
pp. 1-28 ◽  
Author(s):  
K. Ray ◽  
M. H. Chowdhury ◽  
J. Zhang ◽  
Y. Fu ◽  
H. Szmacinski ◽  
...  
Keyword(s):  
Optical Sensing ◽  
High Sensitivity ◽  
Plasmon Controlled Fluorescence

scholarly journals A portable and high-sensitivity optical sensing system for detecting fluorescently labeled enterohaemorrhagic Escherichia coli Shiga toxin 2B-subunit

PLoS ONE ◽  
2020 ◽  
Vol 15 (7) ◽  
pp. e0236043
Author(s):  
Jeongtae Kim ◽  
Jun-Young Park ◽  
Young-Jun Park ◽  
Seo-Young Park ◽  
Moo-Seung Lee ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Shiga Toxin ◽  
Optical Sensing ◽  
High Sensitivity ◽  
Sensing System ◽  
Enterohaemorrhagic Escherichia Coli

scholarly journals Metamaterials and chiral sensing: a review of fundamentals and applications

Nanophotonics ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 249-261 ◽  
Author(s):  
SeokJae Yoo ◽  
Q-Han Park
Keyword(s):  
Mirror Symmetry ◽  
Optical Sensing ◽  
High Sensitivity ◽  
Local Fields ◽  
Chiral Molecules ◽  
Non Invasive ◽  
Sensing Platforms ◽  
Chiral Sensing ◽  
Active Research ◽  
Shed Light

AbstractChirality, a property of broken mirror symmetry, prevails in nature. Chiral molecules show different biochemical behaviors to their mirror molecules. For left or right circularly polarized lights, the fundamental chiral states of electromagnetic fields interact differently with chiral matter, and this effect has been used as a powerful tool for the detection of chiral molecules. This optical sensing, also termed chiral sensing, is not only easy to implement but also non-invasive to the analytes. However, the measurements made by the optical sensing of chiral molecules are challenging, as chiroptical signals are extremely weak. Recent years have seen active research efforts into metamaterial and plasmonic platforms for manipulating local fields to enhance chiroptical signals. This metamaterial approach offers new possibilities of chiral sensing with high sensitivity. Here, we review the recent advances in chiral sensing using metamaterial and plasmonic platforms. In addition, we explain the underlying principles behind the enhancement of chiroptical signals and highlight practically efficient chiral sensing platforms. We also provide perspectives that shed light on design considerations for chiral sensing metamaterials and discuss the possibility of other types of chiral sensing based on resonant metamaterials.

scholarly journals Construction of anisotropic fluorescent nanofibers assisted by electro-spinning and its optical sensing applications

RSC Advances ◽  
2019 ◽  
Vol 9 (22) ◽  
pp. 12585-12589 ◽  
Author(s):  
Fa-Heng Zhang ◽  
Rui-Xue Jiang ◽  
Wei Cao ◽  
Bin Du ◽  
Ding-Yuan Cao ◽  
...  
Keyword(s):  
Response Time ◽  
Vinylidene Fluoride ◽  
Optical Sensing ◽  
High Sensitivity ◽  
The Self ◽  
Short Response Time ◽  
Perylene Bisimide ◽  
Sensing Applications ◽  
Poly Vinylidene Fluoride ◽  
Self Assembled

Anisotropic fluorescent nanofibers constructed from the self-assembled perylene bisimide derivative and poly(vinylidene fluoride) show high sensitivity and short response time to aniline vapor.

scholarly journals Efficient Chemical Surface Modification Protocol on SiO2 Transducers Applied to MMP9 Biosensing

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 8156
Author(s):  
Ana L. Hernandez ◽  
Sidharam P. Pujari ◽  
María F. Laguna ◽  
Beatriz Santamaría ◽  
Han Zuilhof ◽  
...  
Keyword(s):  
Surface Modification ◽  
Photoelectron Spectroscopy ◽  
Surface Characterization ◽  
Optical Sensing ◽  
High Sensitivity ◽  
Label Free ◽  
Chemical Surface ◽  
Sensing Applications ◽  
Chemical Surface Modification ◽  
Optical Transducers

The bioreceptor immobilization process (biofunctionalization) turns to be one of the bottlenecks when developing a competent and high sensitivity label-free biosensor. Classical approaches seem to be effective but not efficient. Although biosensing capacities are shown in many cases, the performance of the biosensor is truncated by the inefficacious biofunctionalization protocol and the lack of reproducibility. In this work, we describe a unique biofunctionalization protocol based on chemical surface modification through silane chemistry on SiO2 optical sensing transducers. Even though silane chemistry is commonly used for sensing applications, here we present a different mode of operation, applying an unusual silane compound used for this purpose (3-Ethoxydimethylsilyl)propylamine, APDMS, able to create ordered monolayers, and minimizing fouling events. To endorse this protocol as a feasible method for biofunctionalization, we performed multiple surface characterization techniques after all the process steps: Contact angle (CA), X-ray photoelectron spectroscopy (XPS), ellipsometry, and fluorescence microscopy. Finally, to evidence the outputs from the SiO2 surface characterization, we used those SiO2 surfaces as optical transducers for the label-free biosensing of matrix metalloproteinase 9 (MMP9). We found and demonstrated that the originally designed protocol is reproducible, stable, and suitable for SiO2-based optical sensing transducers.

scholarly journals High Sensitivity Optical Sensing Based on Modal Interferences in One-Dimensional Photonic Crystals

Proceedings ◽  
2018 ◽  
Vol 4 (1) ◽  
pp. 20
Author(s):  
Luis Torrijos-Morán ◽  
Jaime García-Rupérez
Keyword(s):  
High Performance ◽  
Slow Light ◽  
Single Channel ◽  
Optical Sensing ◽  
High Sensitivity ◽  
Edge Region ◽  
One Dimensional ◽  
Wide Range ◽  
Integrated Optical ◽  
Integrated Optical Sensor

A one-dimensional photonic crystal supporting two modes is presented as an interferometric integrated optical sensor. The sensing is carried out by obtaining the phase difference between both modes propagated through the same nanometric structure and how it changes when a refractive index (RI) variation over the sensor takes place. Due to the slow-light phenomenon, high sensitivities values are reached near the photonic bandgap edge region. As a result, a high performance, compact, and single-channel optical sensing approach is theoretically calculated and demonstrated with a wide range of applications in the biosensing field.

High-sensitivity optical sensing of axial strain based on microfiber with microarched transition region

2017 ◽  
Vol 56 (11) ◽  
pp. 1 ◽  
Author(s):  
Liang Xia ◽  
Zengshan Xing ◽  
Jianhui Yu ◽  
Huihui Lu ◽  
Heyuan Guan ◽  
...  
Keyword(s):  
Transition Region ◽  
Optical Sensing ◽  
Axial Strain ◽  
High Sensitivity

Hollow ARROW waveguides on self-aligned pedestals for high-sensitivity optical sensing

2010 ◽  
Author(s):  
Evan J. Lunt ◽  
Brian S. Phillips ◽  
Jared M. Keeley ◽  
Aaron R. Hawkins ◽  
Philip Measor ◽  
...  
Keyword(s):  
Optical Sensing ◽  
High Sensitivity
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