High‐resolution wide‐field surface plasmon microscopy

Stabler, Graham; Somekh, Michael Geoffrey; See, C. W.

doi:10.1111/j.0022-2720.2004.01309.x

Cited by 66 publications

(41 citation statements)

References 34 publications

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“…(6). Plotting the natural logarithm of y ′ (t) versus time compared to the natural logarithm of the first and the second term shows the overall response compared to the fast and slow responses.…”

Section: Response Time Of the Gold-electrolyte Interface To Applied Vmentioning

confidence: 99%

“…However, in this discussion, the response is simplified by fitting to the second order function presented by Eq. (6). Therefore, the time-varying response is characterised by two time constants τ 1 and τ 2 which are dominant for the ranges t ≤ 0.2 and t > 0.2 respectively.…”

Section: Response Time Of the Gold-electrolyte Interface To Applied Vmentioning

confidence: 99%

“…In both cases, surface plasmon resonance is achieved at specific angle of incidence. The excitation of SPs results in a drop of the intensity of the reflected light [2] and a sharp phase transition [4,5] at the resonance angle [6] or wavelength [7]. This resonance is sensitive to the properties of the dielectric layer adjacent to the metal as well as the metal surface.…”

Section: Introductionmentioning

confidence: 99%

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Sensitive detection of voltage transients using differential intensity surface plasmon resonance system

et al. 2017

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Sensitive detection of voltage transients using differential intensity surface plasmon resonance system. Optics Express, 25 (25). pp. 31552-31567. ISSN 1094-4087 Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/46901/8/oe-25-25-31552.pdf Copyright and reuse:The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. This article is made available under the Creative Commons Attribution licence and may be reused according to the conditions of the licence. For more details see: http://creativecommons.org/licenses/by/2.5/ A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. Abstract: This paper describes theoretical and experimental study of the fundamentals of using surface plasmon resonance (SPR) for label-free detection of voltage. Plasmonic voltage sensing relies on the capacitive properties of metal-electrolyte interface that are governed by electrostatic interactions between charge carriers in both phases. Externally-applied voltage leads to changes in the free electron density in the surface of the metal, shifting the SPR position. The study shows the effects of the applied voltage on the shape of the SPR curve. It also provides a comparison between the theoretical and experimental response to the applied voltage. The response is presented in a universal term that can be used to assess the voltage sensitivity of different SPR instruments. Finally, it demonstrates the capacity of the SPR system in resolving dynamic voltage signals; a detection limit of 10mV with a temporal resolution of 5ms is achievable. These findings pave the way for the use of SPR systems in the detection of electrical activity of biological cells. 56, 1495-1503 (2013). 34. R. Azzam and N. Bashara, Ellipsometry and polarized light (Elsevier science, 1987. 35. J. Zhang, T. Atay, and A. Nurmikko, "Optical detection of brain cell activity using plasmonic gold nanoparticles", Nano Lett. 9, 519-524 (2009 Düsseldorf, Germany, 15-20 September 2002, vol. 48 (Elsevier, 2003. Opt. 12, 555-563 (1973). 42. N. Tao, S. Boussaad, R. Huang, W.L.and Arechabaleta, and J. DÁgnese, "High resolution surface plasmon resonance spectroscopy," Rev. Sci. Instrum.70, 4656-4660 (1999). 43. Z. Kerner and T. Pajkossy, "On the origin of capacitance dispersion of rough electrodes," Electrochim. Acta 46, 207-211 (2000). 44. W. Wang, K. Foley, X. Shan, S. Wang, S. Eaton, V. J. Nagaraj, P. Wiktor, U. Patel, and N. Tao, "Single cells and intracellular processes studied by a plasmonic-based electrochemical impedance microscopy," Nat. Chem. 3, 249-255 (2011). 1997-2003 (2005). 46. C. Celedón, M. Flores, P. Häberle, and J. Valdés, "Surface roughness of thin gold films and its ef...

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Section: Response Time Of the Gold-electrolyte Interface To Applied Vmentioning

confidence: 99%

Section: Response Time Of the Gold-electrolyte Interface To Applied Vmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sensitive detection of voltage transients using differential intensity surface plasmon resonance system

et al. 2017

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“…For p-polarized incident light, the field amplitude increases on the gold region of the sample compared to the glass region due to the excitation of SPPs on the gold-air interface. Small features on the gold surface scatter the SPPs [125], which is seen as strong amplitude variations on the gold region. The cosine of the phase of the optical field on the transition region for p-and s-polarized incident beams is shown in Fig.…”

Section: Spatial Phase Evolution On Glass-metal Transition Regionmentioning

confidence: 99%

“…The field enhancement on the sensor's metal surface due to the excitation of the SPPs implies that a small variation in the refractive index can perturb the SPP field [125]. The dependance of the SPP field on small changes in the near field of the metal surface determines the sensitivity of a SPR sensor.…”

Section: Sensingmentioning

confidence: 99%