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One-Step Fabrication of Pyranine Modified- Reduced Graphene Oxide with Ultrafast and Ultrahigh Humidity Response.

ABSTRACT: A facile one-step supramolecular assembly method is adopted to modify reduced graphene oxide (rGO) with functional organic molecule pyranine for achieving comprehensive humidity sensing performance. The fabricated humidity sensor based on pyranine modified-reduced graphene oxide (Pyr-rGO) exhibits excellent sensing performance with ultrafast (<2?s) and ultrahigh response of I_L/I_H?=?6000 as relative humidity (RH) consecutively changes between 11% and 95%; small hysteresis of 8% RH; reliable repeatability and stability. In addition, a detailed mechanism analysis is performed to investigate the difference in water adsorption and ions transfer under various RH levels. Notably, the one-step supramolecular assembly method to prepare Pyr-rGO provides a new insight into developing novel functional humidity sensing materials with enhanced device performance.

SUBMITTER: Chen Z

PROVIDER: S-EPMC5457436 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature

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One-Step Fabrication of Pyranine Modified- Reduced Graphene Oxide with Ultrafast and Ultrahigh Humidity Response.

Chen Zhuo Z Wang Yao Y Shang Ying Y Umar Ahmad A Xie Peng P Qi Qi Q Zhou Guofu G

Scientific reports 20170602 1

A facile one-step supramolecular assembly method is adopted to modify reduced graphene oxide (rGO) with functional organic molecule pyranine for achieving comprehensive humidity sensing performance. The fabricated humidity sensor based on pyranine modified-reduced graphene oxide (Pyr-rGO) exhibits excellent sensing performance with ultrafast (<2 s) and ultrahigh response of I<sub>L</sub>/I<sub>H</sub> = 6000 as relative humidity (RH) consecutively changes between 11% and 95%; small hysteresis of ...[more]

PMID: 28578418

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