Novel Christmas Branched Like NiO/NiWO4/WO3 (p-p-n) Nanowire Heterostructures for Chemical Sensing

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A90116%2F21%3A10513086" target="_blank" >RIV/00216208:90116/21:10513086 - isvavai.cz</a>

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=J189PeEpUL" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=J189PeEpUL</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/adfm.202104416" target="_blank" >10.1002/adfm.202104416</a>

Result language

angličtina

Original language name

Novel Christmas Branched Like NiO/NiWO4/WO3 (p-p-n) Nanowire Heterostructures for Chemical Sensing

Original language description

Establishing a platform comprising different nanostructured oxides is an emerging idea to develop highly sensitive and selective sensing devices. Herein, novel 3D-heterostructures (p-p-n) consisting of 1D nanowires of NiO and WO3 along with their intermediate reactive product, i.e., NiWO4 seed, are produced by a two-steps vapor phase growth method. In-depth morphological and structural investigations describing the growth mechanism of these heterostructures are presented. Finally, the p-p-n heterostructures are integrated into conductometric sensing devices and their performances are investigated toward different gases. It is observed that by modulating the charge-carrier transport with temperature, the heterostructure sensors exhibit selective behavior toward different gas analytes. Indeed, at 300 degrees C, the heterostructure sensors show relatively selective behavior toward NO2, while at 400 degrees C, high selectivity toward VOCs is observed. The improvement in sensing performances is mainly based on charge carrier transport through the two interfaces (one at WO3/NiWO4 (n-p) and the other at NiWO4/NiO (p-p)) and the modulation of charge carriers in the electron depletion layer of WO3 and hole accumulation layer of NiO and NiWO4. The remarkable performance of these complex heterostructures with low ppb-level detection limits makes them excellent candidates for chemical/ gas sensing applications in e-noses.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

—

Continuities

—

Publication year

2021

Confidentiality

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

Name of the periodical

Advanced Functional Materials

ISSN

1616-301X

e-ISSN

1616-3028

Volume of the periodical

31

Issue of the periodical within the volume

38

Country of publishing house

DE - GERMANY

Number of pages

13

Pages from-to

2104416

UT code for WoS article

000669117500001

EID of the result in the Scopus database

2-s2.0-85109155865