Table 4 The characteristics of nps.

From: Experimental investigation of wettability alteration in sandstone rock by nanoparticles, gelatin biopolymer, salt ions, and synthesized Fe3O4/gelatin nanocomposite for EOR applications

Type of NPs

Purity (%)

APS (nm)

Color

Morphology

Source

Fe3O4

99

20–30

Dark Brown

Spherical

US Research Nanomaterials, Inc. USA

SiO2

99

20–30

White

Shapeless

US Research Nanomaterials, Inc. USA

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