Multi-wavelength-coupled in-line pharmaceutical monitoring inspections with photo-thermoelectric device design of broadband image sensor array sheets

Sun, Meiling; Li, Kou; Utaki, Ryogo; Kawano, Yukio

doi:10.1109/irmmw-thz46771.2020.9370999

Cited by 1 publication

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, photo-irradiation in higher-transparency THz–IR bands [ 90 , 91 ] relaxes the above technical difficulties in realizing non-destructive and on-site chemical evaluations. Indeed, THz sensing and imaging with the CNT-film-based PTE sensor sheet of solid or gas samples simply analyze the material properties of the targets in a non-destructive, non-sampling, and label-free manner [ 26 , 92 , 93 ]. In addition to solid or gas samples, handling liquid targets is essential to develop a ubiquitous non-destructive monitoring platform because chemicals often dissolve in water, oil, alcohol, etc.…”

Section: Applications: Ubiquitous Non-destructive Inspectionsmentioning

confidence: 99%

Recent Progress in Development of Carbon-Nanotube-Based Photo-Thermoelectric Sensors and Their Applications in Ubiquitous Non-Destructive Inspections

Kinoshita

Sakai

et al. 2022

Micromachines

View full text Add to dashboard Cite

The photo-thermoelectric (PTE) effect in electronic materials effectively combines photo-absorption-induced local heating and associated thermoelectric conversion for uncooled and broadband photo-detection. In particular, this work comprehensively summarizes the operating mechanism of carbon nanotube (CNT)-film-based PTE sensors and ubiquitous non-destructive inspections realized by exploiting the material properties of CNT films. Formation of heterogeneous material junctions across the CNT-film-based PTE sensors, namely photo-detection interfaces, triggers the Seebeck effect with photo-absorption-induced local heating. Typical photo-detection interfaces include a channel–electrode boundary and a junction between P-type CNTs and N-type CNTs (PN junctions). While the original CNT film channel exhibits positive Seebeck coefficient values, the material selections of the counterpart freely govern the intensity and polarity of the PTE response signals. Based on these operating mechanisms, CNT film PTE sensors demonstrate a variety of physical and chemical non-destructive inspections. The device aggregates broad multi-spectral optical information regarding the targets and reconstructs their inner composite or layered structures. Arbitrary deformations of the device are attributed to the macroscopic flexibility of the CNT films to further monitor targets from omni-directional viewing angles without blind spots. Detection of blackbody radiation from targets using the device also visualizes their behaviors and associated changes.

show abstract