Self-Organized Graphene/Graphite Structures Obtained Directly on Paper

TL;DR

This paper presents a simple, non-conventional method to produce self-organized graphene/graphite structures on paper through repeated rubbing, resulting in anisotropic, optically oriented layers with enhanced photoconductivity.

Contribution

It introduces a novel, easy technique for fabricating ordered graphene structures on paper, demonstrating their unique electrical and optical properties.

Findings

Carrier mobility reaches ~10^3 cm^2/V*sec at the surface.

Surface exhibits ordered, optically oriented graphene layers.

Enhanced photoconductivity observed with Raman spectra at 976 nm.

Abstract

We experimentally investigated the properties of graphite layers produced by an easy and non-conventional method of repeatedly rubbing conventional random stacked graphite bulk against insulating and semiconductor substrates. The patterned structure composed of rubbed-off and transferred layers exhibits properties of a solid-state material with through-thickness anisotropy of carrier mobility reaching ~10^3 cm^2/V*sec at the surface. The surface of the structure demonstrates quality of more ordered and optically oriented mono or few layer graphene shaped by self-organization process due to friction. Enhanced photoconductivity originating from modification of continuous and linear valence and conduction bands caused by interaction between 4 graphene layers made possible obtaining Raman spectra at near infrared excitation wavelength of 976 nm.