Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Rudolf Bierl"'
Autor:
Jonas Pangerl, Pritam Sukul, Thomas Rück, Patricia Fuchs, Stefan Weigl, Wolfram Miekisch, Rudolf Bierl, Frank-Michael Matysik
Publikováno v:
Photoacoustics, Vol 38, Iss , Pp 100604- (2024)
In this research we present a low-cost system for breath acetone analysis based on UV-LED photoacoustic spectroscopy. We considered the end-tidal phase of exhalation, which represents the systemic concentrations of volatile organic compounds (VOCs)
Externí odkaz:
https://doaj.org/article/ca05002359f14954bede73d523db3ae8
Autor:
Thomas Rück, Jonas Pangerl, Lukas Escher, Simon Jobst, Max Müller, Rudolf Bierl, Frank-Michael Matysik
Publikováno v:
Photoacoustics, Vol 40, Iss , Pp 100652- (2024)
This study presents a detailed quantitative analysis of kinetic cooling in methane photoacoustic spectroscopy, leveraging the capabilities of a digital twin model. Using a quantum cascade laser tuned to 1210.01 cm⁻¹, we investigated the effects of
Externí odkaz:
https://doaj.org/article/8b7e0680d5354b11ba03bbcc8ecf7107
Autor:
Jonas Pangerl, Elisabeth Moser, Max Müller, Stefan Weigl, Simon Jobst, Thomas Rück, Rudolf Bierl, Frank-Michael Matysik
Publikováno v:
Photoacoustics, Vol 30, Iss , Pp 100473- (2023)
Trace gas analysis in breath is challenging due to the vast number of different components. We present a highly sensitive quantum cascade laser based photoacoustic setup for breath analysis. Scanning the range between 8263 and 8270 nm with a spectral
Externí odkaz:
https://doaj.org/article/62f2faf0009d4b74a2a9d25fc8aeb9e9
Autor:
Max Müller, Thomas Rück, Simon Jobst, Jonas Pangerl, Stefan Weigl, Rudolf Bierl, Frank-Michael Matysik
Publikováno v:
Photoacoustics, Vol 26, Iss , Pp 100371- (2022)
Successful transfer of photoacoustic gas sensors from laboratory to real-life applications requires knowledge about potential cross-sensitivities towards environmental and gas matrix changes. Multi-dimensional calibration in case of cross-sensitiviti
Externí odkaz:
https://doaj.org/article/c7f9f012a4e442c8993892b821e7da65
Publikováno v:
Sensors, Vol 23, Iss 4, p 2276 (2023)
Osteoporosis is a common disease of old age. However, in many cases, it can be very well prevented and counteracted with physical activity, especially high-impact exercises. Wearables have the potential to provide data that can help with continuous m
Externí odkaz:
https://doaj.org/article/b6c291574c024a21a173d43d3be95895
Publikováno v:
Chemosensors, Vol 9, Iss 7, p 175 (2021)
The increasing popularity of nanoparticles in many applications has led to the fact that these persistent materials pollute our environment and threaten our health. An online sensor system for monitoring the presence of nanoparticles in fresh water w
Externí odkaz:
https://doaj.org/article/f50c951c63eb4087afec0a6f23f91dfc
Autor:
Christa Genslein, Peter Hausler, Eva-Maria Kirchner, Rudolf Bierl, Antje J. Baeumner, Thomas Hirsch
Publikováno v:
Beilstein Journal of Nanotechnology, Vol 7, Iss 1, Pp 1564-1573 (2016)
The label-free nature of surface plasmon resonance techniques (SPR) enables a fast, specific, and sensitive analysis of molecular interactions. However, detection of highly diluted concentrations and small molecules is still challenging. It is shown
Externí odkaz:
https://doaj.org/article/db0b1f6344704311bbf345b7b3b2faaa
Publikováno v:
Imaging and Applied Optics Congress 2022 (3D, AOA, COSI, ISA, pcAOP).
We introduce a low-cost photoacoustic NO2 sensor based on lateral LED illumination and optical background signal compensation. The 3σ limit of detection (LOD) was identified to be 24 ppbV.
Autor:
Jonas Pangerl, Elisabeth Wittmann, Stefan Weigl, Max Müller, Rudolf Bierl, Frank-Michael Matysik
Publikováno v:
Optical Sensors and Sensing Congress 2022 (AIS, LACSEA, Sensors, ES).
Photoacoustic spectra of main breath components together with acetone are presented demonstrating spectral linearity towards different concentrations and compositions. The acetone 3σ detection limit at 1209 cm − 1 is 0.28 ppbV.
Publikováno v:
Optical Sensors and Sensing Congress 2022 (AIS, LACSEA, Sensors, ES).
We present the calculation results from a digital twin (DT) of our photoacoustic (PA) sensor for methane detection, regarding gas composition, temperature and pressure variations.