On the mechanism of piezoresistance in nanocrystalline graphite

• Sandeep Kumar,
• Simone Dehm and
• Ralph Krupke

Beilstein J. Nanotechnol. 2024, 15, 376–384, doi:10.3762/bjnano.15.34

• values. For larger strains, mechanisms such as grain rotation and the formation of nanocracks might contribute to the piezoresistive behavior in nanocrystalline graphene. Keywords: grain boundary; nanocrystalline graphene; strain sensor; Raman; tunneling and destruction; Introduction Flexible strain

• and destruction model [24]. (d) Typical stress–strain curve of amorphous polymer PMMA film (reprinted from [32], Polymer, Vol. 44, Issue 19, by Z. H. Stachurski, “Strength and deformation of rigid polymers: the stress–strain curve in amorphous PMMA“, pages 6067–6076, Copyright (2003), with permission

• regions where NCG has been etched. (a) Sheet resistance vs strain curve for NCG shown for two subsequently measured cycles of bending. (b) ΔR/R0 specifying GFs. The two parallel lines indicate similar GFs in two strain regimes. (c) Logarithm of normalized resistance vs strain curve for NCG with tunneling