Publication detail

Gigahertz-Based Visible Light Detection Enabled via CdS-Coated TiO2 Nanotube Layers

WILTSHIRE, B. ALIJANI, M. SOPHA, H. PAVLIŇÁK, D. HROMÁDKO, L. ZAZPE MENDIOROZ, R. THALLURI, S. KOLÍBALOVÁ, E. MACÁK, J. ZARIFI, M.

Original Title

Gigahertz-Based Visible Light Detection Enabled via CdS-Coated TiO2 Nanotube Layers

Type

journal article in Web of Science

Language

English

Original Abstract

Detection of visible light is a key component in material characterization techniques and often a key component of quality or purity control analyses for health and safety applications. Here in this work, to enable visible light detection at gigahertz frequencies, a planar microwave resonator is integrated with high aspect ratio TiO2 nanotube (TNT) layer-sensitized CdS coating using the atomic layer deposition (ALD) technique. This unique method of visible light detection with microwave-based sensing improves integration of the light detection devices with digital technology. The designed planar microwave resonator sensor was implemented and tested with resonant frequency between 8.2 and 8.4 GHz and a resonant amplitude between -15 and -25 dB, depending on the wavelength of the illuminated light illumination on the nanotubes. The ALD CdS coating sensitized the nanotubes in visible light up to similar to 650 nm wavelengths, as characterized by visible spectroscopy. Furthermore, CdS-coated TNT layer integration with the planar resonator sensor allowed for development of a robust microwave sensing platform with improved sensitivity to green and red light (60 and 1300%, respectively) compared to the blank TNT layers. Moreover, the CdS coating of the TNT layer enhanced the sensor's response to light exposure and resulted in shorter recovery times once the light source was removed. Despite having a CdS coating, the sensor was capable of detecting blue and UV light; however, refining the sensitizing layer could potentially enhance its sensitivity to specific wavelengths of light in certain applications.

Keywords

light detection; visible wavelength range; planar microwave resonator; CdS; atomic layer deposition; resonant structure; TiO2 nanotubes

Authors

WILTSHIRE, B.; ALIJANI, M.; SOPHA, H.; PAVLIŇÁK, D.; HROMÁDKO, L.; ZAZPE MENDIOROZ, R.; THALLURI, S.; KOLÍBALOVÁ, E.; MACÁK, J.; ZARIFI, M.

Released

12. 4. 2023

Publisher

AMER CHEMICAL SOC

Location

WASHINGTON

ISBN

1944-8252

Periodical

ACS applied materials & interfaces

Year of study

15

Number

14

State

United States of America

Pages from

18379

Pages to

18390

Pages count

12

URL

https://pubs.acs.org/doi/10.1021/acsami.2c21877

BibTex

@article{BUT183781,
  author="Benjamin D. {Wiltshire} and Mahnaz {Alijani} and Hanna Ingrid {Sopha} and David {Pavliňák} and Luděk {Hromádko} and Raúl {Zazpe Mendioroz} and Sitaramanjaneya Mouli {Thalluri} and Eva {Kolíbalová} and Jan {Macák} and Mohammad H. {Zarifi}",
  title="Gigahertz-Based Visible Light Detection Enabled via CdS-Coated TiO2 Nanotube Layers",
  journal="ACS applied materials & interfaces",
  year="2023",
  volume="15",
  number="14",
  pages="18379--18390",
  doi="10.1021/acsami.2c21877",
  issn="1944-8252",
  url="https://pubs.acs.org/doi/10.1021/acsami.2c21877"
}