A fluorescent sensor with a separation mechanism for exciting light

C. F. Lin, H. H. Tsai, Y. Z. Juang, R. L. Wang, H. W. Chu, Mei-Jywan Syu, Z. K. Lin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, a fluorescent sensor for fluorescence immunoassay is presented. The assembled structure separates the path of emitted fluorescence from that of exciting light, hence the fluorescence is shined upon an N-Well/P-sub silicon photodiode and the exciting light is directed away from the photodiode. The N-Well/P-sub silicon photodiode has a metal mesh pattern which can suppress the incidence of long-wavelength light, such as infra-red light, into the photodiode and reduce dark current resulting from environmental long-wavelength light. The dark current is about 10pA. In this work, a read-out circuit of current-controlled oscillator using photo-current to control its oscillation frequency was designed to measure the fluorescent intensity. In the circuit, the output oscillation frequency is a linear function of fluorescent intensity. The experiment results show that the green fluorescent intensity can be measured with a good linearity of 99.2%.

Original languageEnglish
Title of host publicationIEEE SENSORS 2012 - Proceedings
DOIs
Publication statusPublished - 2012 Dec 1
Event11th IEEE SENSORS 2012 Conference - Taipei, Taiwan
Duration: 2012 Oct 282012 Oct 31

Publication series

NameProceedings of IEEE Sensors

Other

Other11th IEEE SENSORS 2012 Conference
CountryTaiwan
CityTaipei
Period12-10-2812-10-31

Fingerprint

Photodiodes
Sensors
Dark currents
Fluorescence
Silicon
Wavelength
Networks (circuits)
Infrared radiation
Metals
Experiments

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Lin, C. F., Tsai, H. H., Juang, Y. Z., Wang, R. L., Chu, H. W., Syu, M-J., & Lin, Z. K. (2012). A fluorescent sensor with a separation mechanism for exciting light. In IEEE SENSORS 2012 - Proceedings [6411520] (Proceedings of IEEE Sensors). https://doi.org/10.1109/ICSENS.2012.6411520
Lin, C. F. ; Tsai, H. H. ; Juang, Y. Z. ; Wang, R. L. ; Chu, H. W. ; Syu, Mei-Jywan ; Lin, Z. K. / A fluorescent sensor with a separation mechanism for exciting light. IEEE SENSORS 2012 - Proceedings. 2012. (Proceedings of IEEE Sensors).
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Lin, CF, Tsai, HH, Juang, YZ, Wang, RL, Chu, HW, Syu, M-J & Lin, ZK 2012, A fluorescent sensor with a separation mechanism for exciting light. in IEEE SENSORS 2012 - Proceedings., 6411520, Proceedings of IEEE Sensors, 11th IEEE SENSORS 2012 Conference, Taipei, Taiwan, 12-10-28. https://doi.org/10.1109/ICSENS.2012.6411520

A fluorescent sensor with a separation mechanism for exciting light. / Lin, C. F.; Tsai, H. H.; Juang, Y. Z.; Wang, R. L.; Chu, H. W.; Syu, Mei-Jywan; Lin, Z. K.

IEEE SENSORS 2012 - Proceedings. 2012. 6411520 (Proceedings of IEEE Sensors).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Lin CF, Tsai HH, Juang YZ, Wang RL, Chu HW, Syu M-J et al. A fluorescent sensor with a separation mechanism for exciting light. In IEEE SENSORS 2012 - Proceedings. 2012. 6411520. (Proceedings of IEEE Sensors). https://doi.org/10.1109/ICSENS.2012.6411520