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Microsensors

Manager: Ing. Prášek Jan, Ph.D.
Members: Ing. Majzlíková Petra, Ph.D. , Ing. Pytlíček Zdeněk
  1. Construction of voltammetric and amperometric sensors and biosensors as planar three-electrode systems (sensors) for detection of species in aqueous solutions (such as heavy metals, thiols, DNA, glucose, etc.). The influence of each electrode in the view of their shape, used material and the whole planar system topography are studied. Main emphasis is given to material composition of the active (working) electrode to ensure sensitivity and selectivity for investigated species. The active electrode (transducer) is usually created using various nanocomposites (e.g. carbon nanotubes, copper oxide nanoparticles, iron oxide based magnetic nanoparticles, cadmium oxide nanoparticles mixed with suitable vehicle or solvent) or via direct surface nanostructuring. The active electrode functionalization allows achieving the specific affinity to selected species.
  2. Gas sensors for ethanol, acetone, methanol, methane, isobutene, etc. are constructed as thick/thin-film planar sensors or micro-hot plates using semiconducting active layers (e.g. tin oxide, titanium oxide, tungsten oxide, etc.). Standard microelectronic technologies (e.g. lithography, thin-film and thick-film technology) and following modification with nanomaterials are employed for gas sensor fabrication. Similarly to voltammetric sensors, the nanostructured surfaces are used for active layer fabrication.
  3. Construction of conductometric sensors, gas sensors, sensors of radiation, dehydration, pressure, etc.

  

Figure 1: Gas sensor heater (left) and three-electrode electrochemical system (right). 

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