Gas Sensitivity Amplification of Interdigitated Chemocapacitors Through Etching

Οικονόμου, Π.; Botsialas, A.; Papanikolaou, Nikos; Kazas, I.; Ντέτσικας, Κωνσταντίνος; Polymeropoulos, George; Hadjichristidis, Nikos; Sanopoulou, M.; Raptis, Ioannis

doi:10.1109/jsen.2019.2939016

Cited by 4 publications

(1 citation statement)

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“…Recent studies show that the level of analytes' absorption for a certain polymer is principally determined by the solubility of both elements. [31,32] Since often solubility follows the rule of thumb "like dissolves like", polymers are expected to show more affinity towards analytes with similar solubility and, therefore, a similar chemical nature. In some studies, polymer-analyte affinity is expressed in terms of the polarity of both elements.…”

Section: Introductionmentioning

confidence: 99%

Hansen Solubility Parameters (HSPs): A Reliable Tool for Assessing the Selectivity of Pristine and Hybrid Polymer Nanocomposites in the Presence of Volatile Organic Compounds (VOCs) Mixtures

Ollé

Casals‐Terré

Martínez

et al. 2022

Macro Materials & Eng

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Polymeric materials are widely employed for monitoring volatile organic compounds (VOCs). Compared to other sensitive materials, polymers can provide a certain degree of selectivity, based on their chemical affinity with organic solvents. The addition of conductive nanoparticles within the polymer layer is a common practice in recent years to improve the sensitivity of these materials. However, it is still unclear the effect that the nanoparticles have on the selectivity of the polymer membrane and vice versa. The current work proposes a methodology based on the Hansen solubility parameters, for assessing the selectivity of both pristine and hybrid polymer nanocomposites. The impedance response of thin polydimethylsiloxane (PDMS) films is compared to the response of hybrid polymer films, based on the addition of multi-walled carbon nanotubes (MWCNTs). With the addition of just 1 wt.% of MWCNTs, fabricated sensors showcased a significant improvement in sensitivity, faster response times, as well as enhanced classification of non-polar analytes (>22% increase) compared to single PDMS layers. The methodology proposed in this work can be employed in the future to assess and predict the selectivity of polymers in single or array-based gas sensors, microfluidic channels, and other analytical devices for the purpose of VOCs discrimination.

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Section: Introductionmentioning

confidence: 99%