Surface enhanced two photon photoluminescence assisted by multi-resonant simple plasmonic geometries (Conference Presentation)

2019 ◽  
Author(s):  
Artur Movsesyan ◽  
Gwénaëlle Lamri ◽  
Monika Fleischer ◽  
Dai Zhang ◽  
Rémi Vincent ◽  
...  
Keyword(s):  
Two Photon ◽  
Surface Enhanced

scholarly journals Imaging and SERS Study of the Au Nanoparticles Interaction with HPV and Carcinogenic Cervical Tissues

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3758
Author(s):  
Andrea Ceja-Fdez ◽  
Ramon Carriles ◽  
Ana Lilia González-Yebra ◽  
Juan Vivero-Escoto ◽  
Elder de la Rosa ◽  
...  
Keyword(s):  
Multiphoton Microscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Rapid Screening ◽  
Emission Region ◽  
Sem Images ◽  
Spectral Signatures ◽  
Two Photon ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Gold Nps

In this work, gold NPs were prepared by the Turkevich method, and their interaction with HPV and cancerous cervical tissues were studied by scanning electron microscopy, energy-dispersive x-ray spectroscopy, confocal and multiphoton microscopy and SERS. The SEM images confirmed the presence and localization of the gold NPs inside of the two kinds of tissues. The light absorption of the gold NPs was at 520 nm. However, it was possible to obtain two-photon imaging (red emission region) of the gold NPs inside of the tissue, exciting the samples at 900 nm, observing the morphology of the tissues. The infrared absorption was probably due to the aggregation of gold NPs inside the tissues. Therefore, through the interaction of gold nanoparticles with the HPV and cancerous cervical tissues, a surface enhanced Raman spectroscopy (SERS) was obtained. As preliminary studies, having an average of 1000 Raman spectra per tissue, SERS signals showed changes between the HPV-infected and the carcinogenic tissues; these spectral signatures occurred mainly in the DNA bands, potentially offering a tool for the rapid screening of cancer.

scholarly journals Двухволновая лазерная стереолитография для создания ИК сенсоров для поверхностно-усиленной спектроскопии-=SUP=-*-=/SUP=-

2019 ◽  
Vol 126 (1) ◽  
pp. 63
Author(s):  
А.Г. Витухновский ◽  
Р.Д. Звагельский ◽  
Д.А. Колымагин ◽  
А.В. Писаренко ◽  
Д.А. Чубич
Keyword(s):  
Electron Beam ◽  
Electron Beam Lithography ◽  
Ir Absorption ◽  
Two Photon ◽  
Sensor Fabrication ◽  
Surface Enhanced ◽  
Ir Sensors ◽  
Wave Laser ◽  
Laser Stereolithography ◽  
Effect Of Surface

AbstractThe results of applying two-photon femtosecond laser photopolymerization for fabrication of structures for sensitive IR sensors are reported. Two methods of sensor fabrication, a two-wave laser stereolithography and an electron-beam lithography, are compared. The possibility of applying the obtained structures for investigation of the effect of surface-enhanced IR absorption (SEIRA) with a STED-compatible oligomer pentaerythritol tetraacrylate (PETTA) as an analytical layer is demonstrated.

Probing Two-Photon Molecular Properties with Surface-Enhanced Hyper-Raman Scattering: A Combined Experimental and Theoretical Study of Crystal Violet

2016 ◽  
Vol 120 (37) ◽  
pp. 20936-20942 ◽  
Author(s):  
Hubert K. Turley ◽  
Zhongwei Hu ◽  
Daniel W. Silverstein ◽  
David A. Cooper ◽  
Lasse Jensen ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Crystal Violet ◽  
Theoretical Study ◽  
Molecular Properties ◽  
Two Photon ◽  
Surface Enhanced

scholarly journals Probing the plasmonic near-field by one- and two-photon excited surface enhanced Raman scattering

2013 ◽  
Vol 4 ◽  
pp. 834-842 ◽  
Author(s):  
Katrin Kneipp ◽  
Harald Kneipp
Keyword(s):  
Raman Scattering ◽  
Photon Energy ◽  
Near Field ◽  
Single Molecules ◽  
Surface Enhanced Raman Scattering ◽  
Plasmonic Nanostructures ◽  
Two Photon ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Strongly enhanced and spatially confined near-fields in the vicinity of plasmonic nanostructures open up exciting new capabilities for photon-driven processes and particularly also for optical spectroscopy. Surface enhanced Raman signatures of single molecules can provide us with important information about the optical near-field. We discuss one- and two-photon excited surface enhanced Raman scattering at the level of single molecules as a tool for probing the plasmonic near-field of silver nanoaggregates. The experiments reveal enhancement factors of local fields in the hottest hot spots of the near-field and their dependence on the photon energy. Also, the number of the hottest spots and their approximate geometrical size are found. Near-field amplitudes in the hottest spots can be enhanced by three orders of magnitudes. Nanoaggregates of 100 nm dimensions provide one hot spot on this highest enhancement level where the enhancement is confined within less than 1nm dimension. The near-field enhancement in the hottest spots increases with decreasing photon energy.

Surface-Enhanced Hyper-Raman Scattering Elucidates the Two-Photon Absorption Spectrum of Rhodamine 6G

2013 ◽  
Vol 117 (6) ◽  
pp. 3046-3054 ◽  
Author(s):  
Chris B. Milojevich ◽  
Daniel W. Silverstein ◽  
Lasse Jensen ◽  
Jon P. Camden
Keyword(s):  
Absorption Spectrum ◽  
Raman Scattering ◽  
Rhodamine 6G ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Surface Enhanced

Surface enhanced two photon absorption near a small metal particle

1988 ◽  
Vol 89 (10) ◽  
pp. 6497-6505 ◽  
Author(s):  
Purna C. Das ◽  
Horia Metiu ◽  
Ashok Puri
Keyword(s):  
Metal Particle ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Surface Enhanced ◽  
Small Metal Particle

scholarly journals Surface-enhanced hyper Raman hyperspectral imaging and probing in animal cells

Nanoscale ◽  
2017 ◽  
Vol 9 (23) ◽  
pp. 8024-8032 ◽  
Author(s):  
Zsuzsanna Heiner ◽  
Marina Gühlke ◽  
Vesna Živanović ◽  
Fani Madzharova ◽  
Janina Kneipp
Keyword(s):  
Hyperspectral Imaging ◽  
Live Cells ◽  
Animal Cells ◽  
Two Photon ◽  
Surface Enhanced

The location of nanoprobes in endosomes of live cells is mapped by off-resonant, two-photon excited vibrational imaging.

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