Abstract

Ultrafine one-dimensional WO₃ nanorods (NRs) with diameters of 10–200 nm have been fabricated using a hydrothermal synthesis method. The optical performance of the WO₃ NRs strongly depends on their various defects as well as their crystal quality. Upon exposure to trace quantities of ethanol gas, the photoluminescence (PL) spectra of these nanorod samples under ultraviolet illumination showed a large variation in intensity. WO₃-NR-based ethanol gas sensing via PL spectra variation demonstrated a 100 ppm sensitivity detection limit and a wide linear detection range of 200–2000 ppm at 100°C. This outstanding optical ethanol sensing performance can be ascribed to the very large surface area to volume ratio of this material, which increases the density of active sites for ethanol adsorption and reaction with adsorbed oxygen species.

© 2022 Optica Publishing Group

Optical temperature sensing by tuning photoluminescence in a wide (visible to near infrared) wavelength range in a Eu³⁺-doped Bi-based relaxor ferroelectric

Arnab De, Anupam Mishra, Dipak Kumar Khatua, Vivek Dwij, Vasant Sathe, Satyam Jena, and Rajeev Ranjan
Opt. Lett. 47(3) 489-492 (2022)

Spectral sensor of the ethanol concentration in water based on photodiode optoelectronic chromatic dispersion

Egor Liokumovitch, Ziv Glasser, and Shmuel Sternklar
Opt. Lett. 47(19) 5076-5079 (2022)

Hypersensitive H₂ sensor based on polymer planar Bragg gratings coated with Pt-loaded WO₃-SiO₂

Stefan Kefer, Jixiang Dai, Minghong Yang, Bernhard Schmauss, and Ralf Hellmann
Opt. Lett. 45(13) 3601-3604 (2020)

Surface plasmon resonance gas sensor with a nanoporous gold film

Chenglong Zhang, Ziwei Liu, Chen Cai, Zehao Yang, and Zhi-Mei Qi
Opt. Lett. 47(16) 4155-4158 (2022)

Self-action effects in hyperbolic metamaterials based on gold nanorods

I. A. Kolmychek, I. V. Malysheva, A. P. Leontiev, K. S. Napolskii, and T. V. Murzina
Opt. Lett. 47(22) 6009-6012 (2022)