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Magnetoresistive and piezoresistive polyaniline nanoarrays in-situ polymerized surrounding magnetic graphene aerogel

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Abstract

Herein, a novel three-dimensional nanocomposite aerogel (rGO/Fe3O4/PANI NAs) with outstanding magnetoresistance and piezoresistance was manufactured by the in-situ polymerized polyaniline nanoarrays (PANI NAs) surrounding magnetic reduced graphene oxide (rGO/Fe3O4) aerogel that was prepared through the combination of hydrothermal method and lyophilization method. This rGO/Fe3O4/PANI NAs nanocomposite aerogel with 60 wt.% loading of PANI NAs well preserved the porous structure and gained a superior mechanical strength (121.04 kPa) compared with that of rGO aerogel, rGO/Fe3O4 aerogel, and rGO/PANI NAs aerogel (43.54, 58.12, and 116.98 kPa, respectively). The rGO/Fe3O4/PANI NAs nanocomposite aerogel could hold its original state with almost 100% recovery ratio after cycling compression tests under 80% of deformation strain at a suitable compression rate of 5 mm min−1. The introduction of PANI NAs into the rGO/Fe3O4 aerogel also brought a satisfactory piezoresistive performance with a large gauge factor up to 2.83 and a superb stability for the electrical signal output (which was decreased only 5.80% after 500 compression cycles) to the rGO/Fe3O4/PANI NAs nanocomposite aerogel. The loading of Fe3O4 and PANI NAs also provided rGO/Fe3O4/PANI NAs nanocomposite aerogel with a negative magnetoresistance value up to − 4.37%. The magnetoresistance was explained via the amelioration of spin transport in the material. The unique negative magnetoresistance and excellent piezoresistance make rGO/Fe3O4/PANI NAs nanocomposite aerogel a promising candidate for the development of advanced electronic devices.

Graphical abstract

A novel three-dimensional nanocomposite aerogel (rGO/Fe3O4/PANI NAs) exhibits amazing negative magnetoresistance and outstanding piezoresistive performance.

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Funding

The authors are grateful for the support and funding from the Foundation of the National Key Research and Development Program of China (2017YFA0204600), Shanghai Rising-Star Program (No. 19QA1409400), and Fundamental Research Funds for the Central Universities. This work is supported by Shanghai Science and Technology Commission (19DZ2271500). The authors also thank Bei**g Zhongkebaice Technology Service Co., Ltd for the HRTEM measurements.

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Authors and Affiliations

  1. Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, China

    Wenhao **e, Feichong Yao & Hongbo Gu

  2. Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450001, China

    Feichong Yao

  3. Integrated Composites Lab (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN, 37966, USA

    Zhanhu Guo

  4. Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China

    Ai Du

  5. Department of Mechanical & Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India

    Nithesh Naik

  6. Aerospace Research Institute of Materials & Processing Technology, Bei**g, 100076, China

    Qin Lei

  7. Taiyuan University of Science and Technology, Taiyuan, 030024, China

    Feichong Yao

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  1. Wenhao **e
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**e, W., Yao, F., Gu, H. et al. Magnetoresistive and piezoresistive polyaniline nanoarrays in-situ polymerized surrounding magnetic graphene aerogel. Adv Compos Hybrid Mater 5, 1003–1016 (2022). https://doi.org/10.1007/s42114-021-00413-y

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