Graphene-enhanced metal oxide gas sensors at room temperature: a review

• Dongjin Sun,
• Yifan Luo,
• Marc Debliquy and
• Chao Zhang

Beilstein J. Nanotechnol. 2018, 9, 2832–2844, doi:10.3762/bjnano.9.264

• sensors based on rGO/metal oxides, which exhibit enhanced sensing performance mainly due to the formation of heterojunctions. Tai et al. [46] deposited ZnO nanoparticles and GO thin films on gold interdigital electrodes (IDEs) through a simple spray process and thermally reduced the deposits to ZnO–rGO

Gas-sensing behaviour of ZnO/diamond nanostructures

• Marina Davydova,
• Alexandr Laposa,
• Jiri Smarhak,
• Alexander Kromka,
• Neda Neykova,
• Josef Nahlik,
• Jiri Kroutil,
• Jan Drahokoupil and
• Jan Voves

Beilstein J. Nanotechnol. 2018, 9, 22–29, doi:10.3762/bjnano.9.4

• : density functional theory (DFT); gas sensor; interdigital electrodes; nanocrystalline diamond; sensitivity; zinc oxide (ZnO); Introduction Currently, a number of studies have been focused on developing gas sensors based on nanomaterials and/or nanostructures. Metal oxides are the most common sensing

• thin layer, ZnO nanorods and hybrid ZnO NRs/NCD grown on the sensor substrate with metal interdigital electrodes. Figure 3a shows room-temperature Raman scattering spectra of the structures with ZnO nanorods and/or NCD under an excitation wavelength of 488 nm. The Raman spectrum of ZnO NRs is

Nanostructured SnO₂–ZnO composite gas sensors for selective detection of carbon monoxide

• Paul Chesler,
• Cristian Hornoiu,
• Susana Mihaiu,
• Cristina Vladut,
• Jose Maria Calderon Moreno,
• Mihai Anastasescu,
• Carmen Moldovan,
• Bogdan Firtat,
• Costin Brasoveanu,
• George Muscalu,
• Ion Stan and
• Mariuca Gartner

Beilstein J. Nanotechnol. 2016, 7, 2045–2056, doi:10.3762/bjnano.7.195

• prepared and deposited on a miniaturized porous alumina transducer using the sol–gel and dip coating method. The transducer, developed by our research group, contains Au interdigital electrodes on one side and a Pt heater on the other side. The sensing films were characterized using SEM and AFM techniques

• (width of the Pt resistor heater). The sensitive area (built on the front side of the alumina wafer) of the transducer has 53 pairs of interdigital electrodes and is 6400 μm in length, 25 μm wide, and the electrode pairs are separated by 25 μm. Sensitive layer deposition The sensitive films were obtained

• the thin films deposited onto the miniaturized transducers are continuous (a uniform deposition) and highly transparent. The dark stripes in the SEM images represent the Au interdigital electrodes, which are visible through the films. Although the films are highly porous, the oxide grains still remain

Ammonia gas sensors based on In₂O₃/PANI hetero-nanofibers operating at room temperature

• Qingxin Nie,
• Zengyuan Pang,
• Hangyi Lu,
• Yibing Cai and
• Qufu Wei

Beilstein J. Nanotechnol. 2016, 7, 1312–1321, doi:10.3762/bjnano.7.122

• nanofibers and pure PANI were mixed with m-cresol to form pastes, in which the weight ratio of In2O3/PANI or PANI to m-cresol was 1:10. Each paste was coated onto interdigital electrodes to construct a sensing film and dried at 55 °C for 2 h in air. Four thin film sensors with different mass ratios of In2O3

Zeolites as nanoporous, gas-sensitive materials for in situ monitoring of DeNO_x-SCR

• Thomas Simons and
• Ulrich Simon

Beilstein J. Nanotechnol. 2012, 3, 667–673, doi:10.3762/bjnano.3.76

• presence of individual ionic iron species has to be assumed, as well as monomeric iron. For in situ monitoring of the NH3 conversion with NOx, both zeolite materials were deposited as a thick film of 50 µm on interdigital electrodes (IDEs) on an actively heated sensor chip. The IDE structure is formed by