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.
Quartz tuning forks photodetectors
Quartz tuning forks as a narrow-bandwidth (∼1 Hz), fast-response (tens of kHz), broadband, high-responsivity infrared photodetectors, suitable for tunable laser-based absorption spectroscopy.
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.
Polysense Innovations srl
PolySenSe Innovations is a spin-off company of the Polytechnic of Bari, devoted to the development of optical-based sensors, technical training for companies, and to find solution to strategic problems.
Vincenzo Luigi Spagnolo
Vittorio M. N. Passaro
Michele Di Gioia
Ada Cristina Ranieri
Raffaele De Palo
The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 8.48) reporting on an ultra-highly sensitive light-induced thermoelastic spectroscopy (LITES) based hydrogen chloride (HCl) sensor, exploiting a custom low-frequency quartz tuning fork (QTF) and a fiber-coupled multi-pass cell (MPC) with optical length of 40 m. At an integration time of 200 Leggi di piùNew Publication on Photoacoustics Journal[…]
The PolySense team has just published a new article on Forntiers in Environmental Chemistry Journal (IF 4.24) reporting on an innovative sensor box employing two acoustic detection modules connected in series for quartz-enhanced photoacoustic multi-gas detection. To demonstrate the sensor versatility, simultaneous detection in air of methane and nitric oxide (NO), is reported. Minimum detection limits Leggi di piùNew Publication on Frontiers in Environmental Chemistry[…]
The PolySense team has just published a new article on Applied Spectroscopy Review Journal Taylor and Francis (IF 5.917) reporting on a review on the design of quartz tuning forks and their applications in quartz-enhanced photoacoustic spectroscopy (QEPAS)-based trace gas sensors. The manufacturing process of quartz tuning forks are explained in detail in this review and the Leggi di piùNew Publication on Applied Spectroscopy Review Journal[…]
The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 8.48) reporting on a QEPAS sensor system for exhaled ammonia (NH3) monitoring. A NH3 minimum detectable concentration of 14 ppb at 1 s averaging time was achieved. Continuous measurements of the NH3 level exhaled by 3 healthy volunteers was carried out to Leggi di piùNew Publication on Photoacoustics Journal[…]
Researchers from China and Italy have developed a highly sensitive and selective optical sensor using quartz-enhanced photoacoustic spectroscopy (QEPAS) for carbon monoxide (CO) detection in sulfur hexafluoride (SF6 ) decomposition. High-voltage apparatuses, utilizing SF6 as gas-insulating medium, require rapid and continuous monitoring. Detecting CO as one of the SF6 decomposition products allows early diagnosis of Leggi di piùCO Detection in SF6 Using Quartz-enhanced Photoacoustic Spectroscopy – a case study[…]
The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 8.48) reporting on a quartz enhanced photoacoustic spectroscopy (QEPAS) sensor capable to detect high concentrations of methane (C1) and ethane (C2). In the concentration ranges under investigation (1%- 10% for C1 and 0.1%- 1% for C2), both linear and nonlinear responses of the Leggi di piùNew Publication on Photoacoustics Journal[…]
Polysense is proud to communicate that five team members have been listed in the 2020 Top 2% Scientists list in the world by Stanford University. In particular, Professors Vittorio Passaro and Vincenzo Spagnolo have been listed in the full career Top 2% Scientists list while Professors Vittorio Passaro, Vincenzo Spagnolo, Pietro Patimisco, Angelo Sampaolo and Marilena Giglio Leggi di piùPolysense Team members listed in the 2020 Top 2% Scientists in the world by Stanford University[…]
The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 8.48) reporting on the realization of an intracavity QEPAS sensor for CO, N2O and H2O detection, employing a quartz tuning fork with T-shaped prongs and a QCL operating at 4.59 µm. Exploiting a ~100 optical power amplification enabled by a high finesse cavity, Leggi di piùNew Publication on Photoacoustics Journal[…]
The Polysense team has just published a new article on ACS Omega in collaboration with Saudi Aramco Company reporting on the performance of a compact and portable QEPAS system able to measurr concentrations of methane (C1), ethane (C2), and propane (C3) in gas phase within the percentage range that is typically encountered in natural gas samples from Leggi di piùNew Publication on ACS Omega[…]
The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 8.48) reporting on the performance of quartz tuning fork (QTF) based laser spectroscopy sensing employing multiple QTFs. To avoid that resonance frequency mismatching of the QTFs degrades the sensor performance, two types of resonance frequency matching method are here proposed. Without regulation, Leggi di piùNew Publication on Photoacoustics Journal[…]