Dynamical response and noise limit of a parametrically pumped microcantilever sensor in a Phase-Locked Loop

Mouro, J.; Paoletti, Paolo; Sartore, Marco; Tiribilli, Bruno

doi:10.1038/s41598-023-29420-3

Cited by 4 publications

(2 citation statements)

References 33 publications

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“…These expressions are derived in detail in previous works [30], [31], in which a very similar system was used to measure the viscosity and viscoelastic properties of liquids.…”

Section: B Analytical Modelmentioning

confidence: 99%

Low Limit of Detection Gas Density Sensing With a Digitally PI-Controlled Microcantilever

Mouro

Paoletti

Sartore³

et al. 2023

IEEE Sensors J.

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This work describes a new platform for sensing mass or rheological properties of gases with unprecedented responsivity and limits of detection. The system consists of a microcantilever working in a phase-locked loop (PLL) with an imposed phase between its excitation and deflection signals. The optically detected cantilever deflection is demodulated against digitally synthetized reference signals, and the quadrature component (Q-signal) is used as the error parameter in a PI controller, which continuously tracks the oscillation frequency. The direct digital synthesis of the reference and actuation signals allows low-noise and fast-transient responses of the sensor for real-time detection of minute changes of any environmental parameter. A general analytical model is derived, used to understand the dynamical response of the platform, and validated against experiments using different gases and pressures. In particular, the responsivity of the sensor to density variations of the fluids and the stability of its frequency response are studied and measured. It is shown that the responsivity and the achieved limits of detection depend on the chosen phase imposed in the loop. A limit of detection for density variations of 3.5 × 10 −4 kg/m 3 in air is measured, in agreement with the theoretical predictions, and one to two orders of magnitude lower than any reported value achieved with the same type of physical uncoated resonant sensors.

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“…These expressions are derived in detail in previous works [30], [31], in which a very similar system was used to measure the viscosity and viscoelastic properties of liquids.…”

Section: B Analytical Modelmentioning

confidence: 99%

Low Limit of Detection Gas Density Sensing With a Digitally PI-Controlled Microcantilever

Mouro

Paoletti

Sartore³

et al. 2023

IEEE Sensors J.

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“…Today, Elbatech still supports AFM/STM laboratories designing custom electronics [161,162]. Recently, the IoT (Internet of Things) technology offered a chance to design a very compact SPM controller called NanoUp in conjunction with the National Council of Research of Genova [163].…”

Section: Technobiochip and Elbatechmentioning

confidence: 99%

Probing Italy: A Scanning Probe Microscopy Storyline

Dinelli

Brucale

Valle

et al. 2023

Micro

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Starting from the late 1980’s, scanning probe microscopy has progressively diffused in Italy until today. In this paper, we provide a brief account of the main historical events and a current picture of the distribution of the active groups. A survey was prepared by LimeSurvey, made of six sections asking for personal and institutional data, human resources, equipment available, fields of interest, research projects, educational/dissemination activities, and two relevant publications in the last six years. It turns out that the Italian community includes more than seventy groups and two companies. It is widely diffused, although mostly concentrated near large academic and research institutions, often in locations where prominent Italian researchers have operated. This community is active in many scientific fields and can produce research of high international quality. It shows a wide competence, as proven by the list of research works published in journals ranked within the top 20% class. The diffusion of SPM microscopes in industry is still sporadic, possibly due to extensive collaborations between the research institutions and industries themselves. The authors hope that this work might be useful to the community and beyond, and that it might stimulate the formation of a more structured network.

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Design and Implementation of Third and Fourth Order Phase Lock Loop Using Simulink

Singh,

Deka,

Konwar

2023

Lecture Notes in Networks and Systems

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Dynamical response and noise limit of a parametrically pumped microcantilever sensor in a Phase-Locked Loop

Cited by 4 publications

References 33 publications

Low Limit of Detection Gas Density Sensing With a Digitally PI-Controlled Microcantilever

Low Limit of Detection Gas Density Sensing With a Digitally PI-Controlled Microcantilever

Probing Italy: A Scanning Probe Microscopy Storyline

Design and Implementation of Third and Fourth Order Phase Lock Loop Using Simulink

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