Publication detail

High-Frequency TiO2 Nanotube-Adapted Microwave Coplanar Waveguide Resonator for High-Sensitivity Ultraviolet Detection

WILTSHIRE, B. ALIJANI, M. MOHAMMADI, S. HOSSEINI, A. MACÁK, J. ZARIFI, M.

Original Title

High-Frequency TiO2 Nanotube-Adapted Microwave Coplanar Waveguide Resonator for High-Sensitivity Ultraviolet Detection

Type

journal article in Web of Science

Language

English

Original Abstract

Ultraviolet (UV) sensors are a key component in growing applications such as water quality treatment and environmental monitoring, with considerable interest in their miniaturization and enhanced operation. This work presents a passive gold coplanar waveguide split ring resonator integrated with anodic self-organized TiO2 nanotube (TNT) membranes with a thickness of 20 mu m to provide real-time UV detection. The resonator operated as a one-port device to capture the reflection coefficient (S11) signal, with a center frequency of 16 GHz and a notch amplitude of -88 dB. It was experimentally analyzed for its UV sensing capability in the range of 36.5-463 mu W/cm(2). The high-frequency resonator was improved through design choices including the addition of a tapered input transmission line, wire bonding for practical device design, and an interdigitated capacitive ring gap. The high frequency also helped mitigate noise due to water vapor or environmental contaminants. S11 amplitude variation was found through both experiments and modeling to follow a linear trend with UV illumination intensity. The resonator exhibited over 45 +/- 2 dB shift in the resonant amplitude under the highest UV illumination conditions, with a sensitivity of 0.084 dB/mu W cm(-2) and the potential to sense UV intensity as low as 2.7 mu W/cm(2). The presented device enabled a repeatable and accurate microwave response under UV illumination with very high sensitivity, entirely through the use of passive circuit elements.

Keywords

coplanar waveguide resonator; split ring resonator; TiO2 nanotube membrane; real-time microwave sensing; UV detection

Authors

WILTSHIRE, B.; ALIJANI, M.; MOHAMMADI, S.; HOSSEINI, A.; MACÁK, J.; ZARIFI, M.

Released

2. 2. 2022

Publisher

AMER CHEMICAL SOC

Location

WASHINGTON

ISBN

1944-8252

Periodical

ACS applied materials & interfaces

Year of study

14

Number

4

State

United States of America

Pages from

6203

Pages to

6211

Pages count

9

URL

https://pubs.acs.org/doi/10.1021/acsami.1c21741

BibTex

@article{BUT177167,
  author="Benjamin D. {Wiltshire} and Mahnaz {Alijani} and Sevda {Mohammadi} and Arezoo {Hosseini} and Jan {Macák} and Mohammad H. {Zarifi}",
  title="High-Frequency TiO2 Nanotube-Adapted Microwave Coplanar Waveguide Resonator for High-Sensitivity Ultraviolet Detection",
  journal="ACS applied materials & interfaces",
  year="2022",
  volume="14",
  number="4",
  pages="6203--6211",
  doi="10.1021/acsami.1c21741",
  issn="1944-8252",
  url="https://pubs.acs.org/doi/10.1021/acsami.1c21741"
}