Stephan Freitag gave a lecture with a title: ” Towards ultrasound enhanced mid-IR spectroscopy for sensing bacteria in aqueous solutions’‘ in Microfluidics, BioMEMS and Medical Microsystems XVI


We employ mid-IR quantum cascade lasers and mid-IR waveguide technology for sensing of bacteria present in aqueous solution. An ultrasonic trap made of a sound source vibrating at 2 MHz and the IRE element itself is integrated in a microfluidic system for sample handing. This trap is employed to push the bacteria against the waveguide for measurement. Based on the characteristic mid-IR absorption bands of bacteria they can be distinguished from other particles present in the sample. Current work aims at the selective measurement of E. coli, P aeruginosa as well as Salmonella in drinking water.


Sunday 28 January 2018