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Sensors 2017, 17(4), 750; doi:10.3390/s17040750

Parallel Detection of Refractive Index Changes in a Porous Silicon Microarray Based on Digital Images

1
School of Physical Science and Technology, Xinjiang University, Urumqi 830046, China
2
College of Information Science and Engineering, Xinjiang University, Urumqi 830046, China
3
The First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, China
*
Author to whom correspondence should be addressed.
Academic Editors: Carlos Domínguez, Xavier Muñoz-Berbel and Pascual Muñoz Muñoz
Received: 18 February 2017 / Revised: 30 March 2017 / Accepted: 31 March 2017 / Published: 2 April 2017
(This article belongs to the Special Issue Silicon Technologies for Photonic Sensors)
View Full-Text   |   Download PDF [7219 KB, uploaded 5 April 2017]   |  

Abstract

A new technique for the refractive index change with high-sensitivity measurements was proposed by the digital image of porous silicon (PSi) microarray utilization in this paper. Under the irradiation of a He-Ne laser, the surface images of the PSi array cells with the microcavity structure were obtained by the digital imaging equipment, whereas the refractive index change of each array cells was detected by calculating the average gray value of the image and the refractive index change measurement sensitivity was 10−4. This technique could be utilized in the label-free and parallel detection of refraction index changes induced by a biological reaction in the microarray or the chip. View Full-Text
Keywords: porous silicon microarray; digital Images; average gray value; refraction index porous silicon microarray; digital Images; average gray value; refraction index
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Li, C.; Jia, Z.; Li, P.; Wen, H.; Lv, G.; Huang, X. Parallel Detection of Refractive Index Changes in a Porous Silicon Microarray Based on Digital Images. Sensors 2017, 17, 750.

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