The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 9.94) reporting on a study of the non-radiative relaxation dynamic of 12CH4 and 13CH4 in wet nitrogen-based matrixes by using the quartz-enhanced photoacoustic spectroscopy (QEPAS) technique. We demonstrated that QEPAS measurements can be used to retrieve both the effective relaxation rate Leggi di piùNew Publication on Photoacoustics Journal[…]
The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 9.94) reporting on a comparison between Quartz Enhanced Photoacoustic Spectroscopy (QEPAS) and Beat Frequency QEPAS (BF-QEPAS) techniques for environmental monitoring of pollutants. Minimum detection limits of 90 ppb and 180 ppb were achieved with QEPAS and BF-QEPAS techniques, respectively, for Nitric Leggi di piùNew Publication on Photoacoustics Journal[…]
The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 9.94) reporting on the development of a ppb-level mid-IR quartz-enhanced photoacoustic sensor for the highly sensitive detection of dimethyl methyl phosphonate (DMMP) —the sarin simulant. A minimum detection limit of 6 ppb was achieved at an integration time of 300 ms, Leggi di piùNew Publication on Photoacoustics Journal[…]
The PolySense team has just published a new article on Advanced Photonics Research journal reporting on a quartz-enhanced photoacoustic spectroscopy sensor architecture capable ofdetecting eight different air pollutants (CH4,NO2,CO2,N2O, CO, NO, SO2, andNH3) . Each analyte is targeted using the same sensor components (acoustic detection module, quartz-tuning fork, etc.) and a dedicated laser source. Both Leggi di piùNew Publication on Advanced Photonics Research[…]
The PolySense team has just published a new article on Micromachines reporting on a theoretical study of the Signal-to-Noise Ratio trend in a voltage-mode read-out of Quartz Tuning Forks (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) Leggi di piùNew Publication on Micromachines[…]
The PolySense team has just published a new article on Optics Letters reporting on a side-excitation light-induced thermoelastic spectroscopy (SE-LITES) technique for trace gas detection. The mechanical stress distribution on the QTF surface was analyzed to identify the optimum thermoelastic excitation approach. A signal-to-noise ratio (SNR) improvement of more than one order of magnitude was Leggi di piùNew Publication on Optics Letters[…]
The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 9.94) reporting on the development of a gas sensor based on light-induced thermo-elastic spectroscopy (LITES) capable to detect methane (C1) and ethane (C2) in a wide concentration range, from percent down to part-per-billion (ppb). Minimum detection limits of ∼650 ppb and Leggi di piùNew Publication on Photoacoustics Journal[…]
The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 9.94) reporting on the development of a highly sensitive hydrogen sulfide (H2S) gas sensor exploiting the doubly resonant photoacoustic spectroscopy technique and using a near-infrared laser emitting at 1578.128 nm. We achieved a minimum detection limit of 10 part per billion Leggi di piùNew Publication on Photoacoustics Journal[…]
The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 9.94) reporting on a on a Near-IR quartz-enhanced photoacoustic sensor (QEPAS) for H2S leaks detection in matrixes containing up to 1 % of methane (CH4). An investigation of the influence of CH4 on H2S relaxation and photoacoustic generation was proposed in this Leggi di piùNew Publication on Photoacoustics Journal[…]
The PolySense team has just published a new article on Optics Express reporting on incubation effect on the laser ablation threshold of quartz, after multi-shot irradiation with femtosecond pulses. A strong decrease of the multi-pulse ablation threshold with the number of pulses was found due to incubation. Moreover, the influence of the repetition rate was Leggi di piùNew Publication on Optics Express[…]