Next Article in Journal
Design and Performance Evaluation of a Dual Antenna Joint Carrier Tracking Loop
Previous Article in Journal
Development of a Cost-Effective Airborne Remote Sensing System for Coastal Monitoring
Previous Article in Special Issue
An Apta-Biosensor for Colon Cancer Diagnostics
Article Menu

Export Article

Open AccessArticle
Sensors 2015, 15(10), 25385-25398; doi:10.3390/s151025385

Analysis of Surface Plasmon Resonance Curves with a Novel Sigmoid-Asymmetric Fitting Algorithm

1,†
,
2,†
and
1,*
1
School of Mechanical Engineering, Korea University, Seoul 136-701, Korea
2
College of Information and Communication Engineering, Sungkyunkwan University, Suwon 440-476, Korea
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Stephen Holler
Received: 24 August 2015 / Revised: 24 September 2015 / Accepted: 25 September 2015 / Published: 30 September 2015
(This article belongs to the Special Issue Label-Free Sensing)
View Full-Text   |   Download PDF [1316 KB, uploaded 30 September 2015]   |  

Abstract

The present study introduces a novel curve-fitting algorithm for surface plasmon resonance (SPR) curves using a self-constructed, wedge-shaped beam type angular interrogation SPR spectroscopy technique. Previous fitting approaches such as asymmetric and polynomial equations are still unsatisfactory for analyzing full SPR curves and their use is limited to determining the resonance angle. In the present study, we developed a sigmoid-asymmetric equation that provides excellent curve-fitting for the whole SPR curve over a range of incident angles, including regions of the critical angle and resonance angle. Regardless of the bulk fluid type (i.e., water and air), the present sigmoid-asymmetric fitting exhibited nearly perfect matching with a full SPR curve, whereas the asymmetric and polynomial curve fitting methods did not. Because the present curve-fitting sigmoid-asymmetric equation can determine the critical angle as well as the resonance angle, the undesired effect caused by the bulk fluid refractive index was excluded by subtracting the critical angle from the resonance angle in real time. In conclusion, the proposed sigmoid-asymmetric curve-fitting algorithm for SPR curves is widely applicable to various SPR measurements, while excluding the effect of bulk fluids on the sensing layer. View Full-Text
Keywords: surface plasmon resonance; fitting algorithm; sigmoid-asymmetric; critical angle; resonance angle surface plasmon resonance; fitting algorithm; sigmoid-asymmetric; critical angle; resonance angle
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Jang, D.; Chae, G.; Shin, S. Analysis of Surface Plasmon Resonance Curves with a Novel Sigmoid-Asymmetric Fitting Algorithm. Sensors 2015, 15, 25385-25398.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top