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Your search keyword '"Patimisco, Pietro"' showing total 233 results
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233 results on '"Patimisco, Pietro"'

36. Quartz-Enhanced Photoacoustic Spectroscopy for One-Health

Author

Patimisco Pietro, Zifarelli Andrea, De Palo Raffaele, Menduni Giansergio, Sampaolo Angelo, Giglio Marilena, Weih Robert, Nauschütz Josephine, Koeth Johannes, and Spagnolo Vincenzo

Subjects
Physics, QC1-999
Abstract

We report on the development of Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) technology to detect 8 different air pollutants, namely CH4, NO2, CO2, N2O, CO, NO, SO2 and NH3, with the same acoustic detection module and interchangeable laser sources, to prove the modularity of the technique as well as the adaptability to different lasers. For each gas species, the fine structure of the infrared absorption bands has been simulated by using HITRAN database. Each gas species was detected with an ultimate detection limit well below their typical natural abundance in air even with a signal integration time as low as 0.1 s.

Published
2023
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42. Highly selective and sensitive detection of volatile organic compounds using long wavelength InAs-based quantum cascade lasers through quartz-enhanced photoacoustic spectroscopy.

Author

Kinjalk, Kumar, Paciolla, Francesco, Sun, Bo, Zifarelli, Andrea, Menduni, Giansergio, Giglio, Marilena, Wu, Hongpeng, Dong, Lei, Ayache, Diba, Pinto, Davide, Vicet, Aurore, Baranov, Alexei, Patimisco, Pietro, Sampaolo, Angelo, and Spagnolo, Vincenzo

Subjects
PHOTOACOUSTIC spectroscopy, QUANTUM cascade lasers, VOLATILE organic compounds, TOLUENE, QUARTZ, INFRARED spectroscopy, INDUSTRIAL safety, ENVIRONMENTAL monitoring, COMPLEX matrices
Abstract

The precise detection of volatile organic compounds plays a pivotal role in addressing environmental concerns, industrial safety, and medical diagnostics. The accurate identification and quantification of these compounds because of their ubiquity and potential health hazards has fueled the development of advanced sensing technologies. This work presents a sensing system in the realm of long-wavelength infrared spectroscopy for achieving enhanced selectivity and sensitivity of benzene, toluene, and propane detection through quartz-enhanced photoacoustic spectroscopy. High-resolution gas spectroscopy is made possible by the use of specially designed InAs/AlSb-based quantum cascade lasers, emitting in the wavelength range 13–15 μm, and quartz tuning forks. The sensor system, characterized by its robustness and precision, demonstrates exceptional capabilities in benzene, toluene, and propane detection. The system's capacity for practical applications in environmental monitoring and medical diagnostics is demonstrated by its ability to distinguish these volatile organic compounds with a minimum detection limit of 113 ppb, 3 ppb, and 3 ppm for toluene, benzene, and propane at an integration time of 10 s, even in complex gas matrices. This work advances gas sensing technology while also offering insightful information on spectral interferences, a persistent problem in the field. The results usher in a new era of sophisticated and reliable gas sensing techniques meeting the growing demand for precise volatile organic compounds detectors for environmental monitoring purposes. [ABSTRACT FROM AUTHOR]

Published
2024
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44. Assessment of vibrational-translational relaxation dynamics of in a wet-nitrogen matrix through QEPAS

Author

Olivieri, Mariagrazia, Giglio, Marilena, Dello Russo, Stefano, Menduni, Giansergio, Zifarelli, Andrea, Patimisco, Pietro, Sampaolo, Angelo, Hongpeng, Wu, Dong, Lei, and Spagnolo, Vincenzo

Subjects
Methane isotopologues, Relaxation rates, Quartz-enhanced photoacoustic spectroscopy, Trace gas sensing, Quantum cascade laser, Methane isotopologues, Trace gas sensing, Quartz-enhanced photoacoustic spectroscopy, Quantum cascade laser, Relaxation rates
Published
2023

45. Quartz-Enhanced Photoacoustic Sensor Based on a Multi-Laser Source for In-Sequence Detection of NO 2 , SO 2 , and NH 3.

Author

Patimisco, Pietro, Ardito, Nicoletta, De Toma, Edoardo, Burghart, Dominik, Tigaev, Vladislav, Belkin, Mikhail A., and Spagnolo, Vincenzo

Subjects
*PHOTOACOUSTIC spectroscopy, *QUANTUM cascade lasers, *LIGHT sources, *DETECTORS, *DETECTION limit
Abstract

In this work, we report on the implementation of a multi-quantum cascade laser (QCL) module as an innovative light source for quartz-enhanced photoacoustic spectroscopy (QEPAS) sensing. The source is composed of three different QCLs coupled with a dichroitic beam combiner module that provides an overlapping collimated beam output for all three QCLs. The 3λ-QCL QEPAS sensor was tested for detection of NO2, SO2, and NH3 in sequence in a laboratory environment. Sensitivities of 19.99 mV/ppm, 19.39 mV/ppm, and 73.99 mV/ppm were reached for NO2, SO2, and NH3 gas detection, respectively, with ultimate detection limits of 9 ppb, 9.3 ppb, and 2.4 ppb for these three gases, respectively, at an integration time of 100 ms. The detection limits were well below the values of typical natural abundance of NO2, SO2, and NH3 in air. [ABSTRACT FROM AUTHOR]

Published
2023
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46. Application of standard and custom quartz tuning forks for quartz-enhanced photoacoustic spectroscopy gas sensing.

Author

Lin, Haoyang, Liu, Yihua, Lin, Leqing, Zhu, Wenguo, Zhou, Xu, Zhong, Yongchun, Giglio, Marilena, Sampaolo, Angelo, Patimisco, Pietro, Tittel, Frank K., Yu, Jianhui, Spagnolo, Vincenzo, and Zheng, Huadan

Subjects
TUNING forks, PHOTOACOUSTIC spectroscopy, TRACE gases, ACOUSTIC transducers, GAS detectors, MANUFACTURING processes, QUARTZ
Abstract

A review on the design of quartz tuning forks and their applications in quartz-enhanced photoacoustic spectroscopy (QEPAS)-based trace gas sensors is reported. Standard commercial quartz tuning forks are used as sound wave transducers in the conventional QEPAS technique. With the development of QEPAS technology, the advent of custom quartz tuning forks has further improved the sensitivity level of QEPAS sensors. The manufacturing process of quartz tuning forks will be explained in detail in this review and the application of quartz tuning forks in QEPAS trace gas sensors in recent years will be summarized. [ABSTRACT FROM AUTHOR]

Published
2023
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47. Signal-to-Noise Ratio Analysis for the Voltage-Mode Read-Out of Quartz Tuning Forks in QEPAS Applications.

Author

Di Gioia, Michele, Lombardi, Luigi, Marzocca, Cristoforo, Matarrese, Gianvito, Menduni, Giansergio, Patimisco, Pietro, and Spagnolo, Vincenzo

Subjects
TUNING forks, SIGNAL-to-noise ratio, RATIO analysis, PHOTOACOUSTIC spectroscopy, DETECTION limit, QUARTZ
Abstract

Quartz tuning forks (QTFs) are employed as sensitive elements for gas sensing applications implementing quartz-enhanced photoacoustic spectroscopy. Therefore, proper design of the QTF read-out electronics is required to optimize the signal-to-noise ratio (SNR), and in turn, the minimum detection limit of the gas concentration. In this work, we present a theoretical study of the SNR trend in a voltage-mode read-out of QTFs, mainly focusing on the effects of (i) the noise contributions of both the QTF-equivalent resistor and the input bias resistor RL of the preamplifier, (ii) the operating frequency, and (iii) the bandwidth (BW) of the lock-in amplifier low-pass filter. A MATLAB model for the main noise contributions was retrieved and then validated by means of SPICE simulations. When the bandwidth of the lock-in filter is sufficiently narrow (BW = 0.5 Hz), the SNR values do not strongly depend on both the operating frequency and RL values. On the other hand, when a wider low-pass filter bandwidth is employed (BW = 5 Hz), a sharp SNR peak close to the QTF parallel-resonant frequency is found for large values of RL (RL > 2 MΩ), whereas for small values of RL (RL < 2 MΩ), the SNR exhibits a peak around the QTF series-resonant frequency. [ABSTRACT FROM AUTHOR]

Published
2023
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49. Detection of Hydrogen Sulfide in Sewer Using an Erbium-Doped Fiber Amplified Diode Laser and a Gold-Plated Photoacoustic Cell.

Author

Feng, Chaofan, Giglio, Marilena, Li, Biao, Sampaolo, Angelo, Patimisco, Pietro, Spagnolo, Vincenzo, Dong, Lei, and Wu, Hongpeng

Subjects
SEMICONDUCTOR lasers, HYDROGEN sulfide, PHOTOACOUSTIC spectroscopy, SEWERAGE, LIGHT sources, ATMOSPHERIC pressure, FIBERS
Abstract

A photoacoustic detection module based on a gold-plated photoacoustic cell was reported in this manuscript to measure hydrogen sulfide (H2S) gas in sewers. A 1582 nm distributed feedback (DFB) diode laser was employed as the excitation light source of the photoacoustic sensor. Operating pressure within the photoacoustic cell and laser modulation depth were optimized at room temperature, and the long-term stability of the photoacoustic sensor system was analyzed by an Allan-Werle deviation analysis. Experimental results showed that under atmospheric pressure and room temperature conditions, the photoacoustic detection module exhibits a sensitivity of 11.39 μV/ppm of H2S and can reach a minimum detection limit (1σ) of 140 ppb of H2S with an integration time of 1 s. The sensor was tested for in-field measurements by sampling gas in the sewer near the Shanxi University canteen: levels of H2S of 81.5 ppm were measured, below the 100 ppm limit reported by the Chinese sewer bidding document. [ABSTRACT FROM AUTHOR]

Published
2022
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