MAGNETIC NANOCOMPOSITES IN PIEZOELECTRIC SENSORS FOR DETERMINATION OF GLYPHOSATE

Piezoelectric gravimetric sensors based on magnetic nanocomposites: polymers with molecular imprints (MIP) Fe3O4@MIP N - (phosphonmethyl) - glycine have been developed. It was found that the optimal concentration ratio of template: functional monomer: cross-monomer is 1: 3: 25. The best synthesis time is 3h with constant stirring at a speed of 60 rpm and heating to 60 °C.

Gas sensors based on mass-sensitive transducers. Part 2: Improving the sensors towards practical application

Within the framework outlined in the first part of the review, the second part addresses attempts to increase receptor material performance through the use of sensor systems and chemometric methods, in conjunction with receptor preparation methods and sensor-specific tasks. Conclusions are then drawn, and development perspectives for gravimetric sensors are discussed.

Selective Ultrasonic Gravimetric Sensors Based on Capacitive Micromachined Ultrasound Transducer Structure—A Review

This review paper discusses the advances of the gravimetric detection devices based on capacitive micromachined ultrasound transducers structure. Principles of gravimetric operation and device modeling are reviewed through the presentation of an analytical, one-dimensional model and finite element modeling. Additionally, the most common fabrication techniques, including sacrificial release and wafer bonding, are discussed for advantages for gravimetric sensing. As functional materials are the most important part of the selective gravimetric sensing, the review of different functional material properties and coating and application methods is necessary. Particularly, absorption and desorption mechanisms of functional materials, like methylated polyethyleneimine, with examples of applications for gas sensing and using immune complexes for specific biomolecules detection are reviewed.