title: Fully integrated monolithic optoelectronic transducer for real-time protein and DNA detection: the NEMOSLAB approach.
abstract: The development and testing of a portable bioanalytical device which was capable for real-time monitoring of binding assays was demonstrated. The device was based on arrays of nine optoelectronic transducers monolithically integrated on silicon chips. The optocouplers consisted of nine silicon avalanche diodes self-aligned to nine silicon nitride waveguides all converging to a single silicon detector. The waveguides were biofunctionalized by appropriate recognition molecules. Integrated thick polymer microchannels provided the necessary fluidic functions to the chip. A single sided direct contact scheme through a board-to-board receptacle was developed and combined with a portable customized readout and control instrument. Real-time detection of deleterious mutations in BRCA1 gene related to predisposition to hereditary breast/ovarian cancer was performed with the instrument developed using PCR products. Detection was based on waveguided photons elimination through interaction with fluorescently labeled PCR products. Detection of single biomolecular binding events was also demonstrated using nanoparticles as labels. In addition, label-free monitoring of bioreactions in real time was achieved by exploiting wavelength filtering on photonic crystal engineered waveguides. The proposed miniaturized sensing device with proper packaging and accompanied by a portable instrument can find wide application as a platform for reliable and cost effective point-of-care diagnosis.
authors: Institute of Microelectronics, N.C.S.R. Demokritos, GR-15310 Aghia Paraskevi, Athens, Attiki, Greece.
authors: Konstantinos
authors: K
authors: Misiakos
authors: Panagiota S
authors: PS
authors: Petrou
authors: Sotirios E
authors: SE
authors: Kakabakos
authors: Drakoulis
authors: D
authors: Yannoukakos
authors: Harry
authors: H
authors: Contopanagos
authors: Thorsten
authors: T
authors: Knoll
authors: Thomas
authors: T
authors: Velten
authors: Marco
authors: M
authors: DeFazio
authors: Luigi
authors: L
authors: Schiavo
authors: Miriam
authors: M
authors: Passamano
authors: Dimitrios
authors: D
authors: Stamou
authors: George
authors: G
authors: Nounesis
mesh_terms: D001483:Base Sequence; D015374:Biosensing Techniques / Q000295:instrumentation*; D003199:Computer Systems; D004247:DNA / Q000032:analysis* / Q000235:genetics*; D004252:DNA Mutational Analysis / Q000295:instrumentation; D004867:Equipment Design; D005260:Female; D005456:Fluorescent Dyes; D019398:Genes, BRCA1; D006801:Humans; D020411:Oligonucleotide Array Sequence Analysis / Q000295:instrumentation; D015345:Oligonucleotide Probes / Q000235:genetics; D055096:Optical Devices; D019095:Point-of-Care Systems; D016133:Polymerase Chain Reaction; D040081:Protein Array Analysis / Q000295:instrumentation; D011506:Proteins / Q000032:analysis*; D012825:Silicon; D014159:Transducers
chemical_list: D005456:Fluorescent Dyes; D015345:Oligonucleotide Probes; D011506:Proteins; D004247:DNA; D012825:Silicon