Publication detail

Atomic Layer Deposition of SnO2-Coated Anodic One-Dimensional TiO(2 )Nanotube Layers for Low Concentration NO2 Sensing

NG, S. PRÁŠEK, J. ZAZPE, R. PYTLÍČEK, Z. SPOTZ, Z. RODRIGUEZ-PEREIRA, J. MICHALIČKA, J. PŘIKRYL, J. KRBAL, M. SOPHA, H. HUBÁLEK, J. MACÁK, J.

Original Title

Atomic Layer Deposition of SnO2-Coated Anodic One-Dimensional TiO(2 )Nanotube Layers for Low Concentration NO2 Sensing

Type

journal article in Web of Science

Language

English

Original Abstract

The continuous emission of nitrous oxides contributes to the overall air pollution and deterioration of air quality. In particular, an effective NO2 sensor capable of low concentration detection for continuous monitoring is demanded for safety, health, and wellbeing. The sensing performance of a metal oxide-based sensor is predominantly influenced by the availability of surface area for O-2 adsorption and desorption, efficient charge transport, and size or thickness of the sensing layer. In this study, we utilized anodic one-dimensional (1D) TiO2 nanotube layers of 5 mu m thick which offer large surface area and unidirectional electron transport pathway as a platform to accommodate thin SnO2 coatings as a sensing layer. Conformal and homogeneous SnO2 coatings across the entire inner and outer TiO2 nanotubes were achieved by atomic layer deposition with a controlled thickness of 4, 8, and 16 nm. The SnO2-coated TiO2 nanotube layers attained a higher sensing response than a reference Figaro SnO2 sensor. Specifically, the 8 nm SnO2-coated TiO2 nanotube layer has recorded up to ten-fold enhancement in response as compared to the blank nanotubes for the detection of 1 ppm NO2 at an operating temperature of 300 degrees C with 0.5 V applied bias. This is attributed to the SnO2/TiO2 heterojunction effect and controlled SnO2 thickness within the range of the Debye length. We demonstrated in this work, a tailored large surface area platform based on 1D nanotubes with thin active coatings as an efficient approach for sensing applications and beyond.

Keywords

gas sensing; functional coatings; TiO2 nanotubes; atomic layer deposition; surface and interface

Authors

NG, S.; PRÁŠEK, J.; ZAZPE, R.; PYTLÍČEK, Z.; SPOTZ, Z.; RODRIGUEZ-PEREIRA, J.; MICHALIČKA, J.; PŘIKRYL, J.; KRBAL, M.; SOPHA, H.; HUBÁLEK, J.; MACÁK, J.

Released

22. 7. 2020

Publisher

AMER CHEMICAL SOC

Location

WASHINGTON

ISBN

1944-8244

Periodical

ACS APPL MATER INTER

Year of study

12

Number

29

State

United States of America

Pages from

33386

Pages to

33396

Pages count

11

URL

https://pubs-acs-org.ezproxy.lib.vutbr.cz/doi/abs/10.1021/acsnano.0c02491

BibTex

@article{BUT164936,
  author="Siow Woon {Ng} and Jan {Prášek} and Raúl {Zazpe Mendioroz} and Zdeněk {Pytlíček} and Zdeněk {Spotz} and Jhonatan {Rodriguez Pereira} and Jan {Michalička} and Jan {Přikryl} and Miloš {Krbal} and Hanna Ingrid {Sopha} and Jaromír {Hubálek} and Jan {Macák}",
  title="Atomic Layer Deposition of SnO2-Coated Anodic One-Dimensional TiO(2 )Nanotube Layers for Low Concentration NO2 Sensing",
  journal="ACS APPL MATER INTER",
  year="2020",
  volume="12",
  number="29",
  pages="33386--33396",
  doi="10.1021/acsami.0c07791",
  issn="1944-8244",
  url="https://pubs-acs-org.ezproxy.lib.vutbr.cz/doi/abs/10.1021/acsnano.0c02491"
}