3D micro and nanostructuration of chemical and biological sensors

Stefano STASSI, Politecnico di Torino

The goal of fabricating portable biological and chemical sensors as low cost and low power alternative to the classical laboratory benchmark analyzers has received a huge boost with the development of micro- and nanotechnology of the last twenty years. Among the several physical sensors proposed in the literature, resonant devices based on frequency variation induced by mass adsorption have demonstrated elevate sensitivity and resolution. Classical silicon microcantilevers have been improved by a 3D micro and nanostructuration of the mechanical oscillator. 3D printing of microcantilever arrays has been used to fabricate ready-to-use chemical and biosensors with tunable properties depending on the resin composition, strongly decreasing cost and process time.  3D nanostructured sensors have been prepared with a bottom-up approach based on integration with high surface area structures (i.e. nanowires, mesoporous silica) to increase the mass sensitivity or fabrication of embedded micro and nanochannels for detection of nanoparticles in liquid environment.

 
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