TiO<sub>2</sub>/Pt/TiO<sub>2</sub> Sandwich Nanostructures: Towards Alcohol Sensing and UV Irradiation-Assisted Recovery

Maolanon, Rungroj; Wongwiriyapan, Winadda; Pratontep, Sirapat

doi:10.1155/2017/8545690

Cited by 5 publications

(1 citation statement)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A titanium dioxide (TiO 2 ) matrix and noble metal nanoparticles (Au or/and Ag) may be used independently in sensing applications [23][24][25][26][27][28][29][30], but it is known that their sensing capabilities are enhanced when they are combined [31]. Moreover, by using a mixture of these materials, the mechanical stability of TiO 2 is combined with the plasmonic sensing properties of Au.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Sensitivity of Nanoplasmonic Thin Films for Ethanol Vapor Detection

Rodrigues

Vaz

2020

Materials

View full text Add to dashboard Cite

Nanoplasmonic thin films, composed of noble metal nanoparticles (gold) embedded in an oxide matrix, have been a subject of considerable interest for Localized Surface Plasmon Resonance (LSPR) sensing. Ethanol is one of the promising materials for fuel cells, and there is an urgent need of a new generation of safe optical sensors for its detection. In this work, we propose the development of sensitive plasmonic platforms to detect molecular analytes (ethanol) through changes of the LSPR band. The thin films were deposited by sputtering followed by a heat treatment to promote the growth of the gold nanoparticles. To enhance the sensitivity of the thin films and the signal-to-noise ratio (SNR) of the transmittance–LSPR sensing system, physical plasma etching was used, resulting in a six-fold increase of the exposed gold nanoparticle area. The transmittance signal at the LSPR peak position increased nine-fold after plasma treatment, and the quality of the signal increased six times (SNR up to 16.5). The optimized thin films seem to be promising candidates to be used for ethanol vapor detection. This conclusion is based not only on the current sensitivity response but also on its enhancement resulting from the optimization routines of thin films’ architectures, which are still under investigation.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhancing the Sensitivity of Nanoplasmonic Thin Films for Ethanol Vapor Detection

Rodrigues

Vaz

2020

Materials

View full text Add to dashboard Cite

show abstract

Probing volatile liquid through an electrical sensor with up gradation to a breathalyzer for drunken drivers

Biswas

Saha

2020

Appl. Phys. A

View full text Add to dashboard Cite

Towards lab-on-chip ultrasensitive ethanol detection using photonic crystal waveguide operating in the mid-infrared

et al. 2021

View full text Add to dashboard Cite

Thanks to the unique molecular fingerprints in the mid-infrared spectral region, absorption spectroscopy in this regime has attracted widespread attention in recent years. Contrary to commercially available infrared spectrometers, which are limited by being bulky and cost-intensive, laboratory-on-chip infrared spectrometers can offer sensor advancements including raw sensing performance in addition to use such as enhanced portability. Several platforms have been proposed in the past for on-chip ethanol detection. However, selective sensing with high sensitivity at room temperature has remained a challenge. Here, we experimentally demonstrate an on-chip ethyl alcohol sensor based on a holey photonic crystal waveguide on silicon on insulator-based photonics sensing platform offering an enhanced photoabsorption thus improving sensitivity. This is achieved by designing and engineering an optical slow-light mode with a high group-index of n g = 73 and a strong localization of modal power in analyte, enabled by the photonic crystal waveguide structure. This approach includes a codesign paradigm that uniquely features an increased effective path length traversed by the guided wave through the to-be-sensed gas analyte. This PIC-based lab-on-chip sensor is exemplary, spectrally designed to operate at the center wavelength of 3.4 μm to match the peak absorbance for ethanol. However, the slow-light enhancement concept is universal offering to cover a wide design-window and spectral ranges towards sensing a plurality of gas species. Using the holey photonic crystal waveguide, we demonstrate the capability of achieving parts per billion levels of gas detection precision. High sensitivity combined with tailorable spectral range along with a compact form-factor enables a new class of portable photonic sensor platforms when combined with integrated with quantum cascade laser and detectors.

show abstract

TiO₂/Pt/TiO₂ Sandwich Nanostructures: Towards Alcohol Sensing and UV Irradiation-Assisted Recovery

Cited by 5 publications

References 37 publications

Enhancing the Sensitivity of Nanoplasmonic Thin Films for Ethanol Vapor Detection

Enhancing the Sensitivity of Nanoplasmonic Thin Films for Ethanol Vapor Detection

Probing volatile liquid through an electrical sensor with up gradation to a breathalyzer for drunken drivers

Towards lab-on-chip ultrasensitive ethanol detection using photonic crystal waveguide operating in the mid-infrared

Contact Info

Product

Resources

About

TiO2/Pt/TiO2 Sandwich Nanostructures: Towards Alcohol Sensing and UV Irradiation-Assisted Recovery

Cited by 5 publications

References 37 publications

Enhancing the Sensitivity of Nanoplasmonic Thin Films for Ethanol Vapor Detection

Enhancing the Sensitivity of Nanoplasmonic Thin Films for Ethanol Vapor Detection

Probing volatile liquid through an electrical sensor with up gradation to a breathalyzer for drunken drivers

Towards lab-on-chip ultrasensitive ethanol detection using photonic crystal waveguide operating in the mid-infrared

Contact Info

Product

Resources

About

TiO₂/Pt/TiO₂ Sandwich Nanostructures: Towards Alcohol Sensing and UV Irradiation-Assisted Recovery