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<p>In the present work, the reduced graphene oxide ( RGO) was synthesized and mixed with polyvinyl alcohol (PVA) to form RGO/PVA composite nanofibers via electrospinning technique. The X-ray diffraction (XRD) pattern shows diffraction peaks corresponding to the RGO and PVA in RGO/PVA nanofibers. Fourier transform infrared (FTIR) spectroscopy confirms the related functional groups of the prepared samples. Scaly nanosheets of RGO were shown by scanning electron microscopy (SEM) image. FE-SEM results show that the RGO nanosheets are incorporated in the PVA nanofiber matrix. The formation of the uniform RGO/PVA nanofibers with high surface roughness was confirmed by the atomic force microscopy (AFM) images. The water contact angle (WCA) measurements up to 83.9° indicate a hydrophobic nature of the RGO–PVA fibers. Furthermore, a high nonlinear absorption coefficient (β = 0.032 ± 0.001 cm/w) and nonlinear refractive index (n<sub>2</sub> = 1.52 × 10<sup>–6</sup> cm<sup>2</sup>/w) of RGO/PVA nanofibers were obtained under continuous-wave (CW) laser regime at a wavelength of 532 nm, by using Z-scan technique. Based on the desirable NLO properties of RGO/PVA composite nanofibers, this study provides a new idea for its use and possible application in many NLO devices such as optical switches, optical storage, and the optical limiting devices.</p>

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High third-order nonlinear absorption characteristics and improved hydrophobicity properties of the electrospun two-dimensional RGO-nanosheet (NS)/PVA nanofibers

  • 期刊论文

  • 发表日期：

    2025年9月14日

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  • Shermineh Galehdarvand,
  • Hossein Mahmoudi Chenari

摘要

In the present work, the reduced graphene oxide ( RGO) was synthesized and mixed with polyvinyl alcohol (PVA) to form RGO/PVA composite nanofibers via electrospinning technique. The X-ray diffraction (XRD) pattern shows diffraction peaks corresponding to the RGO and PVA in RGO/PVA nanofibers. Fourier transform infrared (FTIR) spectroscopy confirms the related functional groups of the prepared samples. Scaly nanosheets of RGO were shown by scanning electron microscopy (SEM) image. FE-SEM results show that the RGO nanosheets are incorporated in the PVA nanofiber matrix. The formation of the uniform RGO/PVA nanofibers with high surface roughness was confirmed by the atomic force microscopy (AFM) images. The water contact angle (WCA) measurements up to 83.9° indicate a hydrophobic nature of the RGO–PVA fibers. Furthermore, a high nonlinear absorption coefficient (β = 0.032 ± 0.001 cm/w) and nonlinear refractive index (n2 = 1.52 × 10–6 cm2/w) of RGO/PVA nanofibers were obtained under continuous-wave (CW) laser regime at a wavelength of 532 nm, by using Z-scan technique. Based on the desirable NLO properties of RGO/PVA composite nanofibers, this study provides a new idea for its use and possible application in many NLO devices such as optical switches, optical storage, and the optical limiting devices.