Integrated Visible optical filter and photodetector for detection of FRET signals

P. Louro, A. Charneca, V. Silva, M. Vieira, A. Karmali

Research output: Contribution to journalConference article

Abstract

In this paper we present a multilayer device based on a-Si:H/a-SiC:H that operates as photodetector and optical filter. The use of such device in protein detection applications is pertinent in Fluorescence Resonance Energy Transfer (FRET) measurements that demand the detection of visible fluorescent signals located at specific wavelengths bands. This device was designed to operate in the visible range with a selective sensitivity dependent on the applied electrical bias. Several nanosensors were tested with a commercial spectrophotometer to judge the performance of the FRET signals using glucose solutions of different concentrations. Two nanosensors (FLIPglu-90μM and FLIPglu-600μM) were tested with a commercial spectrofluorimeter to judge the performance of the FRET signals by using glucose solutions of different concentrations. These measurements were carried out by using these nanosensors both in the free form and immobilized form on inner epidermis of onion bulb scale. The proposed device was used to demonstrate the possibility of FRET signals detection, using visible signals of similar wavelength and intensity. The device sensitivity was tuned to enhance the wavelength band of interest using adequate electrical biasing.

Original languageEnglish
Article number651
JournalMaterials Research Society Symposium Proceedings
Volume1689
DOIs
Publication statusPublished - 2014
Event2014 MRS Spring Meeting - San Francisco, United States
Duration: 21 Apr 201425 Apr 2014

Keywords

  • semiconducting
  • sensor
  • Si

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