
1.Instituto de Microelectrónica de Barcelona IMB-CNM (CSIC), Campus UAB, 08193 Bellaterra, Spain
2.Institut für Mikrotechnik, Technische Universität Braunschweig, Braunschweig 38106, Germany
A Llobera, Instituto de Microelectrónica de Barcelona IMB-CNM (CSIC), Campus UAB, 08193 Bellaterra, Spain Email: andreu.llobera@imb-cnm.csic.es
C Fernández-Sánchez, Instituto de Microelectro´ nica de Barcelona IMB-CNM (CSIC), Campus UAB, 08193 Bellaterra, Spain Email: cesar.fernandez@imb-cnm.csic.es
Published:2015-06,
Published Online:20 January 2015,
Received:23 October 2014,
Revised:16 December 2014,
Accepted:10 January 2015
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Llobera, A. et al. Biofunctionalized all-polymer photonic lab on a chip with integrated solid-state light emitter. Light: Science & Applications, 4, e271 (2015).
Llobera, A. et al. Biofunctionalized all-polymer photonic lab on a chip with integrated solid-state light emitter. Light: Science & Applications, 4, e271 (2015). DOI: 10.1038/lsa.2015.44.
A photonic lab on a chip (PhLOC)
comprising a solid-state light emitter (SSLE) aligned with a biofunctionalized optofluidic multiple internal reflection (MIR) system
is presented. The SSLE is obtained by filling a microfluidic structure with a phenyltrimethoxysilane (PhTMOS) aqueous
sol
solution containing a fluorophore organic dye. After curing
the resulting xerogel solid structure retains the emitting properties of the fluorophore
which is evenly distributed in the xerogel matrix. Photostability studies demonstrate that after a total dose (at
λ
=365 nm) greater than 24 J cm
−2
the xerogel emission decay is only 4.1%. To re-direct the emitted light
the SSLE includes two sets of air mirrors that surround the xerogel. Emission mapping of the SSLE demonstrates that alignment variations of 150 µm (between the SSLE and the external pumping light source) provide fluctuations in emitted light smaller than 5%. After this verification
the SSLE is monolithically implemented with a MIR
forming the PhLOC. Its performance is assessed by measuring quinol
one yellow
obtaining a limit of detection (LOD) of (0.60±0.01) µM. Finally
the MIR is selectively biofunctionalized with horseradish peroxidase (HRP) for the detection of hydrogen peroxide (H
2
O
2
) target analyte
obtaining a LOD of (0.7±0.1) µM for H
2
O
2
confirming
for the first time
that solid-state xerogel-based emitters can be massively implemented in biofunctionalized PhLOCs.
medical devicesphotonic lab on a chippolymer technologysolid-state light emitterssol–gel
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