@article{BronderPoghossianKeusgenetal.2017,
  author    = {Bronder, Thomas and Poghossian, Arshak and Keusgen, Michael and Sch{\"o}ning, Michael Josef},
  title     = {Label-free detection of double-stranded DNA molecules with polyelectrolyte-modified capacitive field-effect sensors},
  series = {tm - Technisches Messen},
  volume    = {84},
  journal   = {tm - Technisches Messen},
  number    = {10},
  publisher = {De Gruyter},
  address   = {Oldenbourg},
  doi       = {10.1515/teme-2017-0015},
  pages     = {628 -- 634},
  year      = {2017},
  abstract  = {In this study, polyelectrolyte-modified field-effect-based electrolyte-insulator-semiconductor (EIS) devices have been used for the label-free electrical detection of double-stranded deoxyribonucleic acid (dsDNA)molecules. The sensor-chip functionalization with a positively charged polyelectrolyte layer provides the possibility of direct adsorptive binding of negatively charged target DNA oligonucleotides onto theSiO2-chip surface.EIS sensors can be utilized as a tool to detect surface-charge changes; the electrostatic adsorption of oligonucleotides onto the polyelectrolyte layer leads to a measureable surface-potential change. Signals of 39mV have been recorded after the incubation with the oligonucleotide solution. Besides the electrochemical experiments, the successful adsorption of dsDNA onto the polyelectrolyte layer has been verified via fluorescence microscopy. The presented results demonstrate that the signal recording of EISchips, which are modified with a polyelectrolyte layer, canbe used as a favorable approach for a fast, cheap and simple detection method for dsDNA.},
  language  = {en}
}