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[…]

The PolySense team has just published  a new article on Applied Science reporting on the realization of a quartz-enhanced photoacoustic spectroscopy (QEPAS)-based ethane gas sensor operating in the near-IR  and  employing a pigtailed laser diode emitting at ~1684 nm as the exciting light source.  The minimum ethane concentration detectable using a 100 ms lock-in integration time achieving Leggi di piùNew Publication on Applied Science[…]

The PolySense team has just published  a new article on Applied Physics Letters reporting on an optical gas sensing technique based on in-plane quartz-enhanced photoacoustic spectroscopy (IP-QEPAS).  IP-QEPAS sensor results in a signal more than 40 times higher than that measured with the standard in-plane QEPAS configuration, confirming the potentiality of this approach. The following Leggi di piùNew Publication on Applied Physics Letters[…]

The PolySenSe Team has visited the THORLABS Headquarter to discuss future development exploiting the New Lab facility that will open soon @ the Physics department of Bari.