Electret, piezoelectret, dielectricity and piezoresistivity discovered in exfoliated-graphite-based flexible graphite, with applications in mechanical sensing and electric powering

@article{Xi2019ElectretPD,
  title={Electret, piezoelectret, dielectricity and piezoresistivity discovered in exfoliated-graphite-based flexible graphite, with applications in mechanical sensing and electric powering},
  author={Xiang Xi and D. D. L. Chung},
  journal={Carbon},
  year={2019}
}

Electret behavior discovered in solder, specifically tin–silver

An electret is a permanent electric dipole exhibited by a material. This work provides the first report of the electret behavior of a solder, which is Sn–4Ag in the form of a fluxless unpoled wire of

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Electret, piezoelectret and piezoresistivity discovered in steels, with application to structural self-sensing and structural self-powering

Electret, piezoelectret, piezoresistivity and stress-dependent electric permittivity are reported in unmodified steels. Structural stress/strain self-sensing based on piezoelectret/piezoresistivity

Piezoelectric and piezoresistive behavior of unmodified carbon fiber

Cement-based piezoelectret

A cement-based piezoelectret is reported for the first time. Both poling during setting and sodium silicate liquid admixture strengthened the piezoelectret effect. The electret voltage increased upon

Piezoresistive Properties of Suspended Graphene Membranes under Uniaxial and Biaxial Strain in Nanoelectromechanical Pressure Sensors

TLDR
The gauge factor is found to be practically independent of the doping concentration and crystallographic orientation of the graphene films, and describes accurately the charge-carrier density and mobility in strained graphene and, hence, the gauge factor.
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