Development of a Mass Sensitive Quartz Crystal Microbalance (QCM)-Based DNA Biosensor Using a 50 MHz Electronic Oscillator Circuit

This work deals with the design of a high sensitivity DNA sequence detector using a 50 MHz quartz crystal microbalance (QCM) electronic oscillator circuit. The oscillator circuitry is based on Miller topology, which is able to work in damping media. Calibration and experimental study of frequency no...

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Detalles Bibliográficos
Autores principales: García-Martinez, Gonzalo, Bustabad, Enrique Alonso, Perrot, Hubert, Gabrielli, Claude, Bucur, Bogdan, Lazerges, Mathieu, Rose, Daniel, Rodriguez-Pardo, Loreto, Fariña, Jose, Compère, Chantal, Vives, Antonio Arnau
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2011
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3231718/
https://www.ncbi.nlm.nih.gov/pubmed/22164037
http://dx.doi.org/10.3390/s110807656
Descripción
Sumario:This work deals with the design of a high sensitivity DNA sequence detector using a 50 MHz quartz crystal microbalance (QCM) electronic oscillator circuit. The oscillator circuitry is based on Miller topology, which is able to work in damping media. Calibration and experimental study of frequency noise are carried out, finding that the designed sensor has a resolution of 7.1 ng/cm(2) in dynamic conditions (with circulation of liquid). Then the oscillator is proved as DNA biosensor. Results show that the system is able to detect the presence of complementary target DNAs in a solution with high selectivity and sensitivity. DNA target concentrations higher of 50 ng/mL can be detected.

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