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Table 2 Results of contact angle investigations with the contact angles given in °, as performed for pristine sapphire, a G50/sapphire film (sample G50-17h), a GO/sapphire adsorbate, a GO/G50/sapphire film, and a dried deposit of GO dispersion (intensively rinsed with water)

From: Interfactant action of an amphiphilic polymer upon directing graphene oxide layer formation on sapphire substrates

Sample As-deposited
Pristine sapphire 76.9 ± 1.1
G50/sapphire 72.2 ± 3
GO/sapphire 65.5 ± 4
GO/G50/sapphire 53.1 ± 2.1
Dried GO dispersion 36 ± 2