Zinc oxide thin film doped with Al2O3, TiO2 and V2O5 as sensitive sensor for trimethylamine gas

Co3O4 nanosheet-built hollow dodecahedrons via a two-step self-templated method and their multifunctional applications

“…As we all know, most of TMA gas sensors devices were operated at high temperatures (300-450°C) [43][44][45]. The sensing measurements based on our materials can be carried out at low operating temperature (100°C) and showed excellent sensing performances.…”

Surface photocurrent gas sensor with properties dependent on Ru(dcbpy)2(NCS)2-sensitized ZnO nanoparticles

“…The various applications of ZnO nanoparticles are due to the larger specific surface, higher surface activity, sensitivity to surrounding environments and superior luminescence and photoelectric properties. Recently, much attention has been paid to ZnO-film for gas sensor to detect trimethylamine, hydrogen, carbon monoxide and oxygen [5][6][7][8]. However, a drawback of these thin-film sensors is that they have to operate at high temperatures (200-600 • C) to make the concentration of carriers attain a certain value to gain sufficient sensitivity, which brings significant inconvenience for practical applications.…”

Nanostructured Semiconducting Metal Oxides for Ammonia Sensors. A Novel HSAB Sensing Paradigm

“…Cr 2 O 3 -activated ZnO and zinc oxide thin film doped with Al 2 O 3 , TiO 2 are examples for this category. [45][46] Here, the promoter enhances the sensitivity of the sensing layer towards ammonia and trimethylamine molecules. It is important to emphasize that pure ZnO thick films (Zn 2+ being a bordeline acid, according to HSAB theory), prepared by screen-printing technique, is almost insensitive to NH 3 .…”