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<p>This study presents an innovation in the field of sensing through a pioneering combination of graphene oxide (or its reduced form) with a conductive polymer PEDOT: PSS For the first time, this hybrid combination, prepared with advanced techniques such as pulsed deposition (PLD), has resulted in the development of a humidity sensor with unprecedented sensitivity that far surpasses the performance of traditional or pure materials, opening the door to a new generation of high-performance sensors. A mixture of graphene oxide (GO) or reduced graphene oxide (rGO) with poly(3,4-ethylenedioxythiopHene)-poly(styrenesulfonate) (PEDOT: PSS) blends and study the effect of electrical electrodes (Al, Ag) on the performance of humidity sensor devices. GO was synthesized using a modified Hummers’ method. GO was reduced using ascorbic acid as the reducing agent to prepare rGO. Pulsed laser deposition (PLD) technique was used to deposit a layer of GO or rGO onto etched electrodes on a glass substrate. The drop-casting technique was utilized to create thin films of PEDOT: PSS over GO or rGO thin layer. The effect of humidity on the electrical features was investigated at various frequencies (20, 100, 200, and 300&#xa0;Hz). The rGO -based sensor exhibited excellent response, attributed to its high proton conductivity and the role of functional groups within it. The rGO/PEDOT: PSS sensor deposited on a silver electrode exhibited the best sensitivity (138187.5 nF/RH) compared to the rGO membrane (123 nF/RH). The rGO/PEDOT: PSS membrane deposited on an aluminum electrode also exhibited good sensitivity (124987.5 nF/RH).</p>

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Manufacturing and Improving Reduced Graphene Oxide (rGO) Membranes for Use as Highly Sensitive Humidity Sensors Based on the Mechanism of Proton Conductivity

  • 期刊论文

  • 发表日期：

    2026年2月7日

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  • Ahmed K. Sameer,
  • Eman K. Hassan

摘要

This study presents an innovation in the field of sensing through a pioneering combination of graphene oxide (or its reduced form) with a conductive polymer PEDOT: PSS For the first time, this hybrid combination, prepared with advanced techniques such as pulsed deposition (PLD), has resulted in the development of a humidity sensor with unprecedented sensitivity that far surpasses the performance of traditional or pure materials, opening the door to a new generation of high-performance sensors. A mixture of graphene oxide (GO) or reduced graphene oxide (rGO) with poly(3,4-ethylenedioxythiopHene)-poly(styrenesulfonate) (PEDOT: PSS) blends and study the effect of electrical electrodes (Al, Ag) on the performance of humidity sensor devices. GO was synthesized using a modified Hummers’ method. GO was reduced using ascorbic acid as the reducing agent to prepare rGO. Pulsed laser deposition (PLD) technique was used to deposit a layer of GO or rGO onto etched electrodes on a glass substrate. The drop-casting technique was utilized to create thin films of PEDOT: PSS over GO or rGO thin layer. The effect of humidity on the electrical features was investigated at various frequencies (20, 100, 200, and 300 Hz). The rGO -based sensor exhibited excellent response, attributed to its high proton conductivity and the role of functional groups within it. The rGO/PEDOT: PSS sensor deposited on a silver electrode exhibited the best sensitivity (138187.5 nF/RH) compared to the rGO membrane (123 nF/RH). The rGO/PEDOT: PSS membrane deposited on an aluminum electrode also exhibited good sensitivity (124987.5 nF/RH).