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 di erential 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.
The PolySense team has just published a new article on Photoacoustics Journal reporting on a comparison between piezoelectric and interferometric readouts of vibrations in quartz tuning forks (QTFs) for quartz-enhanced photoacoustic (QEPAS) trace gas detection. The following link provide access to the article. http://polysense.poliba.it/wp-content/uploads/2020/01/113_Piezo-interferometric-QEPAS_Photoaocustics_2020.pdf
The PolySense team has just published a new article on Photoacoustics Journal reporting on multi-gas QEPAS detection of methane and nitrous oxide using a quantum cascade laser array. A methane detection sensitivity of 200 ppb and 60 ppb for nitrous oxide were achieved with a 10 s lock-in integration time. The following link provide access Leggi di piùNew Publication on Photoacoustics Journal[…]
The PolySense team has just published a new article on Applied Physics Letters reporting on a highly sensitive trace gas sensor based on light-induced thermoelastic spectroscopy (LITES) and a custom quartz tuning fork (QTF). A minimum detection limit of 325 ppb was achieved at an integration time of 1 s, nearly one order of magnitude Leggi di piùNew Publication on Applied Physics Letters[…]
The PolySense team has just published a new article on Optics Express reporting on the realization of a novel grooved quartz tuning fork detector for Quartz-enhanced photoacoustic sensing. Rectangular grooves were carved on each prong surface of the QTF to reduce the electrical resistance and enhance the piezoelectric effect without affecting the resonance frequency and Leggi di piùNew Publication on Optics Express[…]
Vincenzo Spagnolo and Pietro Patimisco from the PolySense team have contributed with a full chapter on QEPAS technology in an Elsevier -Woodhead Publishing Series in Electronic and Optical Materials book entitled: Mid-infrared Optoelectronics Materials, Devices, and Applications, 1st edition. The following link provide access to the article: http://polysense.poliba.it/wp-content/uploads/2019/11/Elsevier-mid-infrared-optoelectronics_qepas-chapter.pdf
Prof. Spagnolo will give a seminar on Nov 7th at the Technical University of Munich on “Quartz-enhanced photoacoustic spectroscopy: basics, merits and real-world applications”.