The PolySense team has just published  a new article on Photoacoustics Journal Elsevier (IF 7.9)  reporting on folded-optics-based quartz-enhanced photoacoustic and photothermal hybrid spectroscopy (FO-QEPA-PTS). In FO-QEPA-PTS, the detection of the photoacoustic and photothermal hybrid signal is achieved through the use of a custom quartz tuning fork (QTF). A multi-laser beam, created by a multi-pass Leggi di piùNew Publication on Photoacoustics Journal[…]

The PolySense team has just published  a new article on Photoacoustics Journal Elsevier (IF 7.9)  reporting on the novel employment of lithium niobate tuning forks as acoustic transducers in photoacoustics spectroscopy for gas sensing. The lithium niobate tuning fork (LiNTF) exhibits a fundamental resonance frequency of 39196.6 Hz and a quality factor Q = 5900 Leggi di piùNew Publication on Photoacoustics Journal[…]

The PolySense team has just published  a new article on Sensors Journal (IF 3.84)  reporting on the implementation of an innovative multi-quantum cascade laser (QCL) module for quartz-enhanced photoacoustic spectroscopy (QEPAS) sensing. The source is composed of three different QCLs coupled with a dichroitic beam combiner module that provides an overlapping collimated beam output for Leggi di piùNew Publications on Sensors Journal[…]

Polysense is proud to communicate that team members have been listed for the fourth year in a row in the Top 2% Scientists list in the world by Stanford University. In particular, Vincenzo Spagnolo has been included in the full career Top 2% Scientists list, scaling more than 18K positions since last year. while Vincenzo Leggi di piùPolysense Team members listed in the 2022 Top 2% Scientists in the world by Stanford University[…]

The PolySense team has just published  a new article on Photoacoustics Journal Elsevier (IF 7.9)  reporting on a comparative analysis of two different approaches developed to deal with molecular relaxation in photoacoustic spectroscopy. The first method employs a statistical analysis based on partial least squares regression, while the second method relies on the development of Leggi di piùNew Publication on Photoacoustics Journal[…]

The PolySense team has just published  a new article on Optics & Laser Technology journal reporting on a study of the generation of Laser-Induced Periodic Surface Structures (LIPSS) on quartz upon irradiation with linearly polarized femto-second laser pulses (pulse duration τ = 200 fs and central wavelength λ = 1030 nm). Two different regimes of Leggi di piùNew Publication on Optics and Laser Technology journal[…]

The PolySense team has just published  a new article on Photoacoustics Journal Elsevier (IF 7.9)  reporting on a quartz enhanced photoacoustic spectroscopy (QEPAS) gas sensor designed for monitoring of ammonia (NH3) at ppb-level concentrations. The sensor is based on a novel custom quartz tuning fork (QTF) with a mid-infrared quantum cascade laser emitting at 9.55 Leggi di piùNew Publication on Photoacoustics Journal[…]

The PolySense team has just published  a new article on Photoacoustics Journal Elsevier (IF 7.9)  reporting on an optical sensor based on light-induced thermoelastic spectroscopy for the detection of hydrogen sulfide (H2S) in sulfur hexafluoride (SF6). The sensor incorporates a compact multi-pass cell measuring 6 cm × 4 cm × 4 cm and utilizes a quartz 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 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[…]