Film bulk acoustic resonators for DNA and protein detection and investigation of in vitro bacterial S-layer formation

Martin Nirschl, Anja Blüher, Christiane Erler, Beate Katzschner, Inger Vikholm-Lundin, Sanna Auer, Janos Vörös, Wolfgang Pompe, Matthias Schreiter, Michael Mertig (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

69 Citations (Scopus)


We report investigations on the use of film bulk acoustic resonators for the label-free, multiplexed biosensing of DNA and proteins. The used acoustic resonators were operated in shear mode at about 800 MHz. From the measured changes of frequency and in dissipation, the mass and the viscoelasticity of biomolecular films formed at the top electrode of the device could be derived, respectively. A mass sensitivity of ∼2 kHz cm2/ng and a minimum detectable mass of ∼1 ng/cm2 were achieved. To demonstrate the highly sensitive detection of the time evolution of protein adsorption, the adsorption kinetics and recrystallisation of bacterial surface layer proteins on gold surfaces were investigated.
Original languageEnglish
Pages (from-to)180-184
JournalSensors and Actuators A: Physical
Issue number1
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed


  • Film bulk acoustic resonator
  • Shear mode operation
  • Biosensors
  • DNA hybridisation
  • Bacterial surface layer proteins


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