Chemiresistors based on li-doped cuo–tio2 films

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/67985882:_____/21:00546331 RIV/61389005:_____/21:00546331

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Chemiresistors based on li-doped cuo–tio2 films

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Chemiresistors based on li-doped cuo–tio2 films

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

<a href="/cs/project/GA19-02804S" target="_blank" >GA19-02804S: Nanostrukturované heteropřechody pro chemirezistory</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chemosensors

ISSN

2227-9040

e-ISSN

—

Svazek periodika

9

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

20

Strana od-do

—

Kód UT WoS článku

000699256200001

EID výsledku v databázi Scopus

2-s2.0-85114992369