Suspended microchannel resonators (SMRs) are sensitive biosensors for microgravimetric analysis. In this work, an innovative glass SMR was monolithically manufactured by a femtosecond laser technique coupled with a wet etching. The SMR was used to analyze liquids with different density, thanks to a 1.04·10−3 kg/m3 density resolution, comparable with the state-of-art silicon-based SMRs. The effective biosensing capability was demonstrated by evaluating the microbial load of different concentrations of P. fluorescens. This innovative and completely transparent SMR can be exploited for real time biosensing, associated with a microscope analysis. Rapid and cost-effective 3D FEMTOPRINT technology can sustain industrial production for point-of-care devices.
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