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Related Experiment Video

Updated: Jan 21, 2026

Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle

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Published on: September 22, 2015

Tailored Plasmons in Pentacene/Graphene Heterostructures with Interlayer Electron Transfer.

F Hu^1,2, M Kim^1,2, Y Zhang³

¹Department of Physics and Astronomy , Iowa State University , Ames , Iowa 50011 , United States.

|August 10, 2019

Summary

van der Waals (vdW) heterostructures show novel properties. This study reveals graphene surface plasmons are sensitive to pentacene layers, with thickness affecting plasmon wavelength due to electron transfer.

Keywords:

Graphene electron transfer pentacene plasmons s-SNOM vdW heterostructures

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Area of Science:

Materials Science
Nanotechnology
Condensed Matter Physics

Background:

Van der Waals (vdW) heterostructures, assembled from 2D materials, exhibit unique properties.
Graphene's Dirac Fermions support surface plasmons, crucial for nano-optical applications.

Purpose of the Study:

To investigate the nanoplasmonic response of graphene in vdW heterostructures with pentacene.
To understand the influence of molecular layer deposition on graphene plasmons.

Main Methods:

Fabrication of vdW heterostructures by depositing pentacene on graphene.
Nanoscale infrared (nano-IR) imaging to study surface plasmon behavior.
Density functional theory (DFT) calculations for theoretical analysis.

Main Results:

Graphene surface plasmons exhibit high sensitivity to adjacent pentacene layers.
Plasmon wavelength shows a systematic, nonlinear decrease with increasing pentacene thickness.
Electron transfer from pentacene to graphene is identified as the primary cause for the observed thickness dependence.

Conclusions:

Interlayer coupling in vdW heterostructures significantly impacts graphene plasmonics.
Pentacene-graphene vdW heterostructures offer a tunable platform for manipulating graphene plasmons.
This work advances understanding of nano-optical phenomena in novel 2D material systems.