Journal
NANO LETTERS
Volume 14, Issue 4, Pages 2219-2224Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl500795k
Keywords
Rolled-up electronics; 3D-microsensor; lab-in-a-tube; nanomembranes
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Funding
- European Research Council under the European Union [311529]
- Volkswagen foundation [86 362]
- European Research Council (ERC) [311529] Funding Source: European Research Council (ERC)
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We present ultracompact three-dimensional tubular structures integrating Au-based electrodes as impedimetric microsensors for the in-flow determination of mono- and divalent ionic species and HeLa cells. The microsensors show an improved performance of 2 orders of magnitude (limit of detection = 0.1 nM for KCl) compared to conventional planar conductivity detection systems integrated in microfluidic platforms and the capability to detect single HeLa cells in flowing phosphate buffered saline. These highly integrated conductivity tubular sensors thus open new possibilities for lab-in-a-tube devices for bioapplications such as biosensing and bioelectronics.
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