Polyethylene terephthalate (PET) optical properties deterioration induced by temperature and protective effect of organically modified SiO2–TiO2 coating

Szczurek, Anna; Tran, Lam Thi Ngoc; Kubacki, Jerzy; Gąsiorek, Anna; Startek, Kamila; Mazur-Nowacka, Anna; Dell’Anna, Rossana; Armellini, Cristina; Varas, Stefano; Carlotto, Alice; Chiasera, Alessandro; Łukowiak, Anna; Krzak, Justyna; Ferrari, Maurizio

doi:10.1016/j.matchemphys.2023.128016

Cited by 6 publications

(1 citation statement)

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“…Indeed, PET has a low moisture absorption of 0.05-0.1%, adequate mechanical strength, and good thermal stability [22]. Remarkably, it has a high (above 80%) [22] and almost constant optical transparency in the wavelength range of 320 to 1000 nm [23]. This makes PET a relevant candidate for this particular application.…”

Section: Concept and Architecture Of The Optical Ph Sensormentioning

confidence: 99%

Low-Cost Optical pH Sensor with a Polyaniline (PANI)-Sensitive Layer Based on Commercial Off-the-Shelf (COTS) Components

Stoukatch,

Debliquy,

Dupont

et al. 2023

Micromachines

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In this paper, we presented a novel, compact, conceptually simple, and fully functional low-cost prototype of a pH sensor with a PANI thin film as a sensing layer. The PANI deposition process is truly low-cost; it performs from the liquid phase, does not required any specialized equipment, and comprises few processing steps. The resulting PANI layer has excellent stability, resistance to solvents, and bio- and chemical compatibility. The pH sensor’s sensing part includes only a few components such as a red-light-emitting diode (LED) as a light source, and a corresponding photodiode (PD) as a detector. Unlike other PANI-based sensors, it requires no sophisticated and expensive techniques and components such lasers to excite the PANI or spectrometry to identify the PANI color change induced by pH variation. The pH sensor is sensitive in the broad pH range of 3 to 9, which is useful for numerous practical applications. The sensor requires a tiny volume of the test specimen, as little as 55 µL. We developed a fully integrated packaging solution for the pH sensor that comprises a limited number of components. The pH sensor comprises exclusively commercial off-the-shelf (COTS) components and standard printed circuit boards. The pH sensor is assembled using standard surface mounting technology (SMT).

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Section: Concept and Architecture Of The Optical Ph Sensormentioning

confidence: 99%