Visualization of biosensors using enhanced surface plasmon resonances in capped silver nanostructures

The Analyst ◽  
2016 ◽  
Vol 141 (3) ◽  
pp. 974-980 ◽  
Author(s):  
Kuang-Li Lee ◽  
Meng-Lin You ◽  
Cheng-Lin Tsai ◽  
Chia-Yu Hung ◽  
Shu-Yi Hsieh ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Optical Design ◽  
Silver Nanostructures ◽  
Direct Visualization ◽  
Label Free ◽  
Surface Plasmon Resonances ◽  
Label Free Detection ◽  
Plasmon Resonances ◽  
Enhanced Surface

We propose a method and optical design for direct visualization of label-free detection.

scholarly journals Layered material platform for surface plasmon resonance biosensing

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
F. Wu ◽  
P. A. Thomas ◽  
V. G. Kravets ◽  
H. O. Arola ◽  
M. Soikkeli ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Food Safety ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Point Of Care ◽  
Layered Materials ◽  
Label Free ◽  
Surface Plasmon Resonances ◽  
Plasmon Resonances

AbstractPlasmonic biosensing has emerged as the most sensitive label-free technique to detect various molecular species in solutions and has already proved crucial in drug discovery, food safety and studies of bio-reactions. This technique relies on surface plasmon resonances in ~50 nm metallic films and the possibility to functionalize the surface of the metal in order to achieve selectivity. At the same time, most metals corrode in bio-solutions, which reduces the quality factor and darkness of plasmonic resonances and thus the sensitivity. Furthermore, functionalization itself might have a detrimental effect on the quality of the surface, also reducing sensitivity. Here we demonstrate that the use of graphene and other layered materials for passivation and functionalization broadens the range of metals which can be used for plasmonic biosensing and increases the sensitivity by 3-4 orders of magnitude, as it guarantees stability of a metal in liquid and preserves the plasmonic resonances under biofunctionalization. We use this approach to detect low molecular weight HT-2 toxins (crucial for food safety), achieving phase sensitivity~0.5 fg/mL, three orders of magnitude higher than previously reported. This proves that layered materials provide a new platform for surface plasmon resonance biosensing, paving the way for compact biosensors for point of care testing.

scholarly journals Palladium-rich plasmonic nanorattles with enhanced LSPRs via successive galvanic replacement mediated by co-reduction

RSC Advances ◽  
2021 ◽  
Vol 11 (63) ◽  
pp. 40112-40119
Author(s):  
Mariia Ivanchenko ◽  
Andrew J. Evangelista ◽  
Hao Jing
Keyword(s):  
Surface Plasmon ◽  
Galvanic Replacement ◽  
Surface Plasmon Resonances ◽  
Plasmon Resonances ◽  
Co Reduction ◽  
Enhanced Surface

Palladium-rich plasmonic nanorattles with enhanced surface plasmon resonances synthesized through successive galvanic replacement mediated by co-reduction.

scholarly journals Tuning the Fano Resonance Between Localized and Propagating Surface Plasmon Resonances for Refractive Index Sensing Applications

Plasmonics ◽  
2013 ◽  
Vol 8 (3) ◽  
pp. 1379-1385 ◽  
Author(s):  
Kristof Lodewijks ◽  
Jef Ryken ◽  
Willem Van Roy ◽  
Gustaaf Borghs ◽  
Liesbet Lagae ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Plasmon ◽  
Fano Resonance ◽  
Surface Plasmon Resonances ◽  
Refractive Index Sensing ◽  
Sensing Applications ◽  
Plasmon Resonances

scholarly journals A sandwich-like strategy for the label-free detection of oligonucleotides by surface plasmon fluorescence spectroscopy (SPFS)

The Analyst ◽  
2016 ◽  
Vol 141 (20) ◽  
pp. 5784-5791 ◽  
Author(s):  
Qiang Su ◽  
Gilbert Nöll
Keyword(s):  
Fluorescence Spectroscopy ◽  
Surface Plasmon ◽  
Molecular Beacons ◽  
Label Free ◽  
Background Fluorescence ◽  
Detection Strategy ◽  
Cutting Surface ◽  
Label Free Detection ◽  
Lower Background

Cutting surface-bound optical molecular beacons results in a sandwich-like detection strategy with lower background fluorescence.

scholarly journals Probing the symmetry of the potential of localized surface plasmon resonances with phase-shaped electron beams

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Giulio Guzzinati ◽  
Armand Béché ◽  
Hugo Lourenço-Martins ◽  
Jérôme Martin ◽  
Mathieu Kociak ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Electron Beams ◽  
Localized Surface Plasmon ◽  
Surface Plasmon Resonances ◽  
Localized Surface Plasmon Resonances ◽  
Plasmon Resonances
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