7/2/2023 0 Comments Piezoelectric tuning fork![]() ![]() Atomic force microscopy (AFM) has proved its capacity to act as a biosensor and determine the affinity between biomolecules of interest. The quantitative measurement of biomolecular interactions is of great interest in molecular biology. Gonzalez, Laura Rodrigues, Mafalda Benito, Angel Maria Pérez-GarcÃa, Lluïsa Puig-Vidal, Manel Otero, Jorge Piezoelectric tuning fork biosensors for the quantitative measurement of biomolecular interactions Experimental results show that the proposed magnetic-field energy harvester using the MME composite tuning-fork exhibits approximately 4 times larger maximum output voltage and 7.2 times higher maximum power than the conventional magnetic-field energy harvester using the MME composite cantilever. Due to the resonance coupling between fork prongs, the MME composite tuning-fork owns strong vibration and high Q value. This MME composite tuning-fork consists of a copper tuning fork with piezoelectric Pb(Zr(1-x)Ti(x))O3 (PZT) plates bonded near its fixed end and with NdFeB magnets attached at its free ends. Yang, Aichao Li, Ping Wen, Yumei Yang, Chao Wang, Decai Zhang, Feng Zhang, JiajiaĪ magnetic-field energy harvester using a low-frequency magneto-mechano-electric (MME) composite tuning-fork is proposed. Note: Enhanced energy harvesting from low-frequency magnetic fields utilizing magneto-mechano-electric composite tuning-fork. Evidently, this newly designed PENG could harvest vibration energy at a lower frequency, which will contribute to broaden the application range of the PENG in energy harvesting and self-powered systems. The peak output voltage and current could respectively reach about 160 mV and 11 nA, and a maximum instantaneous peak power of 0.92 μW cm -3 across a matched load of 9 MΩ was obtained. On this basis, the experimental results further verify that this designed energy harvester could operate at a low frequency which was about 13 Hz. Moreover, a series of simulation models were established to compare the performance of the PENG with that of different shapes. Benefiting from the high flexibility and the controllable shape of the substrate, this PENG was extremely sensitive to vibration and can harvest weak vibration energy at a low frequency. ![]() In the PENG, a tuning fork-shaped elastic beam combined with ZnO nanorods (NRs), instead of conventional rectangular cantilever beams, was adopted to extract vibration energy. In this paper, a piezoelectric nanogenerator (PENG) based on a tuning fork-shaped cantilever was designed and fabricated, aiming at harvesting low frequency vibration energy in the environment. In both cases the detection limit is defined by the thermal noise of the tuning fork.Īn enhanced low-frequency vibration ZnO nanorod-based tuning fork piezoelectric nanogenerator.ĭeng, Weili Jin, Long Chen, Yueqi Chu, Wenjun Zhang, Binbin Sun, Huan Xiong, Da Lv, Zekai Zhu, Minhao Yang, Weiqing The detection limit (L) for the optical read-out is determined to be L opt=(2598Â☘4) ppm (1 σ) compared to L elec=(2579Â☗8) ppm (1 σ) for piezoelectric read-out. The two sensors show similar characteristics. To demonstrate the potential of the optical read-out of tuning forks in photoacoustics, a comparison between the performances of a sensor with interferometric read-out and conventional QEPAS with piezoelectric read-out is reported. Instead of conventional piezoelectric signal read-out, as applied in well-known quartz-enhanced photoacoustic spectroscopy (QEPAS), an interferometric read-out method for measurement of the tuning fork's oscillation is presented. Schade, W.Ī photoacoustic trace gas sensor based on an optical read-out method of a quartz tuning fork is shown. Tuning fork enhanced interferometric photoacoustic spectroscopy: a new method for trace gas analysis ![]()
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