%0 Journal Article
%T Fluorescence Multi-Detection Device Using a Lensless Matrix Addressable microLED Array.
%A Moro V
%A Canals J
%A Moreno S
%A Higgins-Wood S
%A Alonso O
%A Waag A
%A Prades JD
%A Dieguez A
%J Biosensors (Basel)
%V 14
%N 6
%D 2024 May 22
%M 38920568
%F 5.743
%R 10.3390/bios14060264
%X A Point-of-Care system for molecular diagnosis (PoC-MD) is described, combining GaN and CMOS chips. The device is a micro-system for fluorescence measurements, capable of analyzing both intensity and lifetime. It consists of a hybrid micro-structure based on a 32 × 32 matrix addressable GaN microLED array, with square LEDs of 50 µm edge length and 100 µm pitch, with an underneath wire bonded custom chip integrating their drivers and placed face-to-face to an array of 16 × 16 single-photon avalanche diodes (SPADs) CMOS. This approach replaces instrumentation based on lasers, bulky optical components, and discrete electronics with a full hybrid micro-system, enabling measurements on 32 × 32 spots. The reported system is suitable for long lifetime (>10 ns) fluorophores with a limit of detection ~1/4 µM. Proof-of-concept measurements of streptavidin conjugate Qdot™ 605 and Amino PEG Qdot™ 705 are demonstrated, along with the device ability to detect both fluorophores in the same measurement.