Our Research activities
Compact acoustic detection modules
Realization of compact acoustic detection module including a custom-made quartz tuning fork and micro-resonator system, optical access via two windows and gas in and out connections.
Custom-made tuning forks and micro-resonators
Custom-made quartz tuning fork properly designed and realized to offer high performance for QEPAS sensors, in terms of quality factor and electrical charges collection efficiency.
Fiber-coupled mid-IR QEPAS Sensors
Fiber-optic components are key enabling technologies to improve the robustness and effectiveness of QEPAS sensors in terms of flexible beam guidance and compactness.
Cavity-Enhanced QEPAS Sensors
Ultra-sensitive and selective QEPAS sensors combined with high-finesse optical cavities can increase the detection sensitivity up to two orders of magnitude.
THz QEPAS SENSORS
High sensitivity THz molecular spectroscopy is crucial for the study of chemical processes related to ozone depletion and global warming, as well as direct identification of explosives and drugs.
EU Project OPTAPHI 2020-2023
The OPTAPHI Postgraduate Training Network aims to train doctoral students in the complementary fields of advanced spectroscopy and integrated optics. Specifically, the focus is on the methods of photo-acoustic and photo-thermal spectroscopy, and their integration with compact semiconductor lasers.
EU PROJECT PASSEPARTOUT 2021-2024
PASSEPARTOUT will advance the development and deployment of miniature, optical based sensors based on Quartz Enhanced Photo-acoustic Spectroscopy and Photo-Thermal Interferometry for a wide range of ambient pollutants. PASSPARTOUT will realize the first 3D mobile optical gas analyser network capable of operating in an urban area exploting on drone-mounted, vehicle-mounted and stationary sensors. (NOx, SO2, NH3, CH4, CO, CO2) and black carbon within urban areas, around landfills and seaports with extremely high precision and good spatial resolution.
Trace gas sensors are the heart of any monitoring system in industrial and urban areas. Real-time and in-situ QEPAS-based monitoring systems are crucial to ensure an environmentally sustainable territorial development.
Exhaled breath biomarkers have particular clinical appeal offering non-invasive medical diagnostics. Dedicated QEPAS sensors can be used as repeatable, continuous and real-time breath analysis tool.
Gas Leak detection is a critical problem for several applications requiring hermetically closed areas. QEPAS-based leak sensors are several orders of magnitude more sensitive than a bubble test or helium sniffer.
Portable Quartz enhanced photoacoustic sensors (QEPAS) system are capable to detect in situ methane, ethane, propane and butane in gas phase, with detection limits in the few part-per-million concentration range.
Monitoring of hotspot areas
Certain chemicals can be used in the illicit manufacture of explosives or to cause harm. Quartz enhanced photoacoustic sensors (QEPAS) system are capable to detect toxic gases and explosive precursors down to few part-per-million concentration range.
Vincenzo Luigi Spagnolo
Vittorio M. N. Passaro
Stefano Dello Russo
Ada Cristina Ranieri
Michele Di Gioia
The PolySense team has just published a new article on Molecules journal reporting on the realization of an innovative near-IR sensor exploiting a novel fiber-coupled ADM and a custom fiber combiner for sequential detection of methane and ethane in air. A minimum detection limit of 0.76 ppm for methane and 34 ppm for ethane at 100 Leggi di piùNew publication on Molecules[…]
Special Issue “Photoacoustic spectroscopy for gas sensing: from theoretical modeling to applications”
Prof. Vincenzo Spagnolo, Prof. Lei Dong, Prof. Yufei Ma, Prof. Pietro Patimisco and Prof. Frank K. Tittel are currently accepting submissions for the upcoming Special Issue titled “Photoacoustic spectroscopy for gas sensing: from theoretical modeling to applications”, which will be published in Photoacoustics Journal Elsevier (Impact Factor: 5.870). You can find the Call for Papers at the following link: https://www.journals.elsevier.com/photoacoustics/call-for-papers/photoacoustic-spectroscopy-for-gas-sensing
The PolySense team has just published a new article on Analytical Chemistry journal reporting on the realization of a highly sensitive sensor for detection of carbon monoxide (CO) in sulfur hexafluoride (SF6). A novel custom T-shaped quartz tuning fork (QTF) with grooved prongs operating at 8 kHz has been implemented. A minimum detection limit of Leggi di piùNew publication on Analytical Chemistry Journal[…]
THORLABS Webinar Series- “New developments in quartz-enhanced photoacoustic sensing real-world applications”
Professor Vincenzo Spagnolo will present a webinar titled New developments in quartz-enhanced photoacoustic sensing real-world applications, for THORLABS Webinar Series. The webinar will take place on September 10th 2020 from 12:00am to 13:00am, Eastern Standard Time (18.00pm to 19.00 pm Italian time). To partecipate to this event is required the registration at the following link: https://www.eventbrite.com/e/utilizing-qepas-for-gas-sensing-applications-tickets-115512251253?aff=ThorlabsWebpage Leggi di piùTHORLABS Webinar Series- “New developments in quartz-enhanced photoacoustic sensing real-world applications”[…]
The PolySense team has just published a new article on Analytical Chemistry journal reporting on a statistical tool based on partial least squares regression (PLSR) able to retrieve single-component concentrations in a multiple-gas mixture characterized by spectrally overlapping absorption features exploiting QEPAS spectroscopy. The following link provide access to the article. http://polysense.poliba.it/wp-content/uploads/2020/07/121_acs.analchem.PLS_2020.pdf
The PolySense team has just published a new article on Optics Express demonstrating an ultra-highly sensitive and robust CH4 sensor based on a 3.3 μm interband cascade laser and a low-noise differential photoacoustic (PAS) cell. With an integration time of 90 s, a detection limit of 0.6 ppb was achieved. No additional water or air laser Leggi di piùNew Publication on Optics Express[…]
The PolySense team has just published a new article on Optics Express demonstrating the possibility to use QTFs as photodetectors in a TDLAS sensor, exploiting the light induced thermo-elastic effect occurring when the laser light hits a QTF surface. In the best experimental conditions, QTF as light detector showed an SNR 6.5 times higher than that Leggi di piùNew Publication on Optics Express[…]
The PolySense team has just published a new article on Fuel – Elsevier reporting on the realization of a shoe-box sized quartz-enhanced photoacoustic spectroscopy system capable of: i) selective detection of methane and ethane in the parts-per-billion range, and propane in the parts-per-million range, by employing a single interband cascade laser ; ii) selective detection Leggi di piùNew Publication on Fuel – Elsevier[…]
The PolySense team has just published a new article on Sensors reporting on a the realization of a dual-gas sensor based on the combination of a quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor and an electronic hygrometer was realized for the simultaneous detection of methane (CH4) and water vapor (H2O) in air. The sensor was tested by Leggi di piùNew Publication on Sensors[…]
The PolySense team has just published a new article on Applied Science reporting on a study of the front-end electronics for quartz tuning forks (QTFs) employed as optoacoustic transducers in quartz-enhanced photoacoustic spectroscopy (QEPAS) sensing. We demonstrated that the fully dierential voltage amplifier allows for a nearly doubled SNR with respect to the typically used single-ended Leggi di piùNew Publication on Applied Science[…]