Volume 57, Issue 35 pp. 11218-11222
Communication

Embedding 1D Conducting Channels into 3D Isoporous Polymer Films for High-Performance Humidity Sensing

Rahul Shevate

Rahul Shevate

Advanced Membranes and Porous Materials Center, King Abdullah Institute of Science and Technology (KAUST), Thuwal, 23955-6900 Kingdom of Saudi Arabia

These authors contributed equally to this work.

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Md Azimul Haque

Md Azimul Haque

Materials Science and Engineering, King Abdullah Institute of Science and Technology (KAUST), Thuwal, 23955-6900 Kingdom of Saudi Arabia

These authors contributed equally to this work.

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Faheem Hassan Akhtar

Faheem Hassan Akhtar

Advanced Membranes and Porous Materials Center, King Abdullah Institute of Science and Technology (KAUST), Thuwal, 23955-6900 Kingdom of Saudi Arabia

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Luis Francisco Villalobos

Luis Francisco Villalobos

Advanced Membranes and Porous Materials Center, King Abdullah Institute of Science and Technology (KAUST), Thuwal, 23955-6900 Kingdom of Saudi Arabia

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Prof. Tom Wu

Corresponding Author

Prof. Tom Wu

Materials Science and Engineering, King Abdullah Institute of Science and Technology (KAUST), Thuwal, 23955-6900 Kingdom of Saudi Arabia

Present address: School of Materials Science and Engineering, University of New South Wales (UNSW), Sydney, NSW, 2052 Australia

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Prof. Klaus-Viktor Peinemann

Corresponding Author

Prof. Klaus-Viktor Peinemann

Advanced Membranes and Porous Materials Center, King Abdullah Institute of Science and Technology (KAUST), Thuwal, 23955-6900 Kingdom of Saudi Arabia

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First published: 29 June 2018
Citations: 38

Graphical Abstract

Sensing on film: A facile strategy for fabricating a CNT-embedded isoporous film is introduced. A chemiresistive sensor based on the functional film was developed for efficient detection of humidity and volatile organic compounds.

Abstract

Isoporous block copolymer (BCP) films have received exponential interest as highly selective membranes, stemming from their unique morphological features, but their applications in functional devices remain to be realized. Now single-walled carbon nanotubes (CNTs) were efficiently incorporated into isoporous block copolymer films for chemiresistive sensing at room temperature. Leveraging the efficient charge extraction ability of CNTs together with nanochannel arrays aligned perpendicular to the surface of the films, an ultrafast response time of 0.3 s was achieved for humidity detection with a sensor response of about 800 on changing humidity from 10 % to 95 %. Furthermore, the sensor also responds to various organic vapors, underscoring its promising detection capability.

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