Chemiresistors based on li-doped cuo–tio2 films

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F21%3A43922954" target="_blank" >RIV/60461373:22340/21:43922954 - isvavai.cz</a>
Alternative codes found
RIV/67985882:_____/21:00546331 RIV/61389005:_____/21:00546331
Result on the web
<a href="https://www.mdpi.com/2227-9040/9/9/246" target="_blank" >https://www.mdpi.com/2227-9040/9/9/246</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/chemosensors9090246" target="_blank" >10.3390/chemosensors9090246</a>

Result language
angličtina
Original language name
Chemiresistors based on li-doped cuo–tio2 films
Original language description
Chemiresistors based on thin films of the Li-doped CuO–TiO2 heterojunctions were synthesized by a 2-step method: (i) repeated ion beam sputtering of the building elements (on the Si substrates and multisensor platforms); and (ii) thermal annealing in flowing air. The structure and composition of the films were analyzed by several methods: Rutherford Backscattering (RBS), Neutron Depth Profiling (NDP), Secondary Ion Mass Spectrometry (SIMS), and Atomic Force Microscopy (AFM), and their sensitivity to gaseous analytes was evaluated using a specific lab-made device operating in a continuous gas flow mode. The obtained results showed that the Li doping significantly increased the sensitivity of the sensors to oxidizing gases, such as NO2, O3, and Cl2, but not to reducing H2 . The sensing response of the CuO–TiO2–Li chemiresistors improved with increasing Li content. For the best sensors with about 15% Li atoms, the detection limits were as follows: NO2 → 0.5 ppm, O3 → 10 ppb, and Cl2 → 0.1 ppm. The Li-doped sensors showed excellent sensing performance at a lower operating temperature (200◦C); however, even though their response time was only a few minutes, their recovery was slow (up to a few hours) and incomplete. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
21001 - Nano-materials (production and properties)

Project
<a href="/en/project/GA19-02804S" target="_blank" >GA19-02804S: Nanostructured heterojunctions for chemiresistors</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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