Conformation mediated preferential swelling of amphiphilic block copolymer ultrathin films

Bal, Jayanta Kumar; Mukherjee, M.; Dildar, Lucky; Gibaud, Alain

doi:10.1007/s10965-017-1384-3

Cited by 1 publication

(1 citation statement)

References 23 publications

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“…Indeed, PEO is a polymer with a high affinity with water, swelling in the presence of humidity. [63,[73][74][75] As a result of this swelling, an increase in the distance between adjacent conductive PEDOT-rich moieties arises. This distancing of the conducting parts was already observed for other conductive fillers within polymer matrices.…”

Section: Resultsmentioning

confidence: 99%

Humidity Sensor Based on PEO/PEDOT:PSS Blends for Breath Monitoring

Silva

Duc

Redon

et al. 2021

Macro Materials & Eng

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The discrimination of humidity in exhaled breath is of utmost importance to turn breath analysis into an efficient noninvasive tool for early diagnosis or treatment monitoring of several diseases. Herein, by assembling different ratios of the conductive poly(3,4-ethylenedioxythiophene): polystyrene sulfonate with the polymer matrix polyethylene oxide (PEO), humidity chemiresistor-based sensors are designed and investigated. The testing results display a broad relative humidity detection range (6-92%), repeatability, reproducibility, and good reversibility. Meanwhile, the sensors possess good reliability for distinct temperatures and in the presence of typical volatile organic compounds found in human exhaled air. The hygroscopic idiosyncrasy of PEO is attributed to be the main responsible for the high sensibility toward humidity. In a proof-of-principle for detection of respiration humidity, the outcome shows the ability of the chemiresistors to detect the humidity variation in a real case of breath exposure up to 2 s intervals. The 30 d trial of stability readings shows a standard deviation of only 2.6%. These sensing devices appear as a new array component able to distinguish moisture from biomarkers of diagnosed diseases in breath analysis.

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Section: Resultsmentioning

confidence: 99%