Ultracompact three-dimensional tubular conductivity microsensors for ionic and biosensing applications Articles uri icon

publication date

  • March 2014

start page

  • 2219

end page

  • 2224


  • 4


  • 14

International Standard Serial Number (ISSN)

  • 1530-6984

Electronic International Standard Serial Number (EISSN)

  • 1530-6992


  • We present ultracompact three-dimensional tubular structures integrating Au-based electrodes as impedimetricmicrosensors for the in-flow determination of mono- and divalent ionic species and HeLa cells. The microsensors show animproved performance of 2 orders of magnitude (limit of detection = 0.1 nM for KCl) compared to conventional planarconductivity detection systems integrated in microfluidic platforms and the capability to detect single HeLa cells in flowingphosphate buffered saline. These highly integrated conductivity tubular sensors thus open new possibilities for lab-in-a-tubedevices for bioapplications such as biosensing and bioelectronics.


  • Materials science and engineering


  • rolled up electronics; 3d microsensor; lab in a tube; nanomembranes