Semiconductor oxide based electrodes for the label-free electrical detection of DNA hybridization: Comparison between Sb doped SnO2 and CdIn2O4
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The commercial application of biosensors has had a significant impact in a number of areas, particularly in the field of medical diagnostics. But in spite of the great number of publications, only a few systems are commercially available in food analysis. ...
This paper presents a microfabricated DNA chip for fully electronic, label-free DNA recognition, based on capacitance measurements. The chip has been fabricated in 0.5-mu m CMOS technology and it features an array of individually addressable sensing sites ...
In view of developing DNA biochips based on electric detection, well controlled DNA functionalisation of conductive substrate electrode is a challenging process. In this study, the whole process of functionalisation onto home made conductive films with con ...
A micrometer-sized electroacoustic DNA-biosensor was developed. The device included a thin semi-crystalline polyethylene terephthalate (PET) dielectric layer with two Ag microband electrodes on one side and a DNA thiol-labeled monolayer adsorbed on a gold ...
We have determined limits of detection (LODs) of DNA hybridization using an optical detection by two different method, i.e., surface plasmon fluorescence spectroscopy (SPFS) and optical waveguide fluorescence spectroscopy (OWFS), however, an identical sens ...
Two types of DNA biosensors are presented. Both sensing principles are demonstrated using synthetic oligomer single-stranded DNA (ssDNA) with concentrations in the micromolar range. A first sensor type is based on the detection of fluorescently labeled ssD ...
A new approach to quantitative single-molecule imaging by confocal laser scanning microscopy (CLSM) is presented. it relies on fluorescence intensity distribution to analyze the molecular occurrence statistics captured by digital imaging and enables direct ...
This paper examines reliable advancements in low-cost DNA- and immuno-chips. Capacitance detection was successfully chosen to develop label-free bio-chips. Probe immobilization was rigorously investigated in order to obtain reliable capacitance measurement ...
Laser photoablation of poly(ethylene terephthalate) (PET), a flexible dielectric organic polymer, was used to design an acoustic miniaturized DNA biosensor. The microchip device includes a 100-μm-thick PET layer, with two microband electrodes patterned in ...
Reliable DNA detection is of great importance for the development of the Lab-on-chip technology. The effort of the most recent projects on this field is to integrate all necessary operations, such as sample preparation (mixing, PCR amplification) together ...