title: Understanding the Potential of WO₃ Based Sensors for Breath Analysis.
abstract: Tungsten trioxide is the second most commonly used semiconducting metal oxide in gas sensors. Semiconducting metal oxide (SMOX)-based sensors are small, robust, inexpensive and sensitive, making them highly attractive for handheld portable medical diagnostic detectors. WO₃ is reported to show high sensor responses to several biomarkers found in breath, e.g., acetone, ammonia, carbon monoxide, hydrogen sulfide, toluene, and nitric oxide. Modern material science allows WO₃ samples to be tailored to address certain sensing needs. Utilizing recent advances in breath sampling it will be possible in the future to test WO₃-based sensors in application conditions and to compare the sensing results to those obtained using more expensive analytical methods.
authors: Institute of Physical and Theoretical Chemistry (IPTC), University of Tuebingen, Auf der Morgenstelle 15, D-72076 Tuebingen, Germany. anna.staerz@ipc.uni-tuebingen.de.|Center for Light-Matter Interaction, Sensors & Analytics (LISA+), University of Tuebingen, Auf der Morgenstelle 15, D-72076 Tuebingen, Germany. anna.staerz@ipc.uni-tuebingen.de.
authors: Anna
authors: A
authors: Staerz
authors: Institute of Physical and Theoretical Chemistry (IPTC), University of Tuebingen, Auf der Morgenstelle 15, D-72076 Tuebingen, Germany. upw@ipc.uni-tuebingen.de.|Center for Light-Matter Interaction, Sensors & Analytics (LISA+), University of Tuebingen, Auf der Morgenstelle 15, D-72076 Tuebingen, Germany. upw@ipc.uni-tuebingen.de.
authors: Udo
authors: U
authors: Weimar
authors: Institute of Physical and Theoretical Chemistry (IPTC), University of Tuebingen, Auf der Morgenstelle 15, D-72076 Tuebingen, Germany. nb@ipc.uni-tuebingen.de.|Center for Light-Matter Interaction, Sensors & Analytics (LISA+), University of Tuebingen, Auf der Morgenstelle 15, D-72076 Tuebingen, Germany. nb@ipc.uni-tuebingen.de.
authors: Nicolae
authors: N
authors: Barsan
mesh_terms: D000096:Acetone / Q000032:analysis; D000641:Ammonia / Q000032:analysis; D015415:Biomarkers; D015374:Biosensing Techniques / Q000379:methods*; D001944:Breath Tests / Q000379:methods*; D006801:Humans; D006862:Hydrogen Sulfide / Q000032:analysis; D057230:Limit of Detection; D009569:Nitric Oxide / Q000032:analysis; D010087:Oxides / Q000737:chemistry*; D014050:Toluene / Q000032:analysis; D014414:Tungsten / Q000737:chemistry*
chemical_list: D015415:Biomarkers; D010087:Oxides; D000096:Acetone; D009569:Nitric Oxide; D014050:Toluene; D000641:Ammonia; C511604:tungsten oxide; D014414:Tungsten; D006862:Hydrogen Sulfide
keywords: SMOX based sensors; WO3; breath analysis; gas sensors