Experimental setup for characterization of self-actuated microcantilevers with piezoresistive readout for chemical recognition of volatile substances

Rev Sci Instrum. 2008 Sep;79(9):094101. doi: 10.1063/1.2976038.

Abstract

This paper summarizes our achievements in the development of an advanced microcantilever-based platform for the detection and recognition of various volatile analytes. The implemented microcantilevers include integrated piezoresistive readout, integrated thermally driven bimorph actuator, and a gold pad at the cantilever apex for functionalization toward the detection of specific substances. Up to eight single microcantilevers can be installed and investigated quasisimultaneously in either gas flow or gas/vapor single injection mode. The experimental setup enables the detection of the microcantilever bending via surface stress changes, characterization of either amplitude or phase spectra of the microcantilever, and also calibration of its sensitivity.