Version 2 2020-04-13, 12:35Version 2 2020-04-13, 12:35
Version 1 2020-03-31, 20:30Version 1 2020-03-31, 20:30
journal contribution
posted on 2020-04-13, 12:35authored byDavid Rabus, Jean-Michel Friedt, Lilia Arapan, Simon Lamare, Marc Baqué, Grégoire Audouin, Frédéric Chérioux
Long-term
monitoring of organic pollutants in the soil is a major
environmental challenge. We propose to meet this issue by the development
of a polymer dedicated to selectively react with H2S, coating
surface acoustic wave transducers designed as passive cooperative
targets with the compound, and probing their response using Ground
Penetrating RADAR, thus providing the capability to monitor the presence
of H2S in the subsurface environment. The selectivity is
brought by including lead(II) cation in a reticulated polymer matrix
which can be deposited as a thin layer on a surface acoustic wave
sensor. We demonstrate a signal enhancement mechanism in which water
absorption magnifies the signal detection, making the sensor most
sensitive to H2S in an underground environment saturated
with moisture.