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Large-Area Graphene Nanodot Array for Plasmon-Enhanced Infrared Spectroscopy.

Kai Zhang1,2, Lei Zhang3, Fung Ling Yap4

  • 1Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore.

Small (Weinheim an Der Bergstrasse, Germany)
|January 13, 2016
PubMed
Summary

Graphene nanodot arrays fabricated using block copolymer lithography exhibit strong mid-infrared plasmonic resonances. This enables highly sensitive and selective plasmon-enhanced infrared spectroscopy for various applications.

Keywords:
enhanced infrared spectroscopygraphenenanodot arraysplasmonself-assembly

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Spectroscopy

Background:

  • Graphene nanodot arrays (GNDAs) offer unique optical properties.
  • Plasmonic resonances in nanostructures are crucial for enhancing light-matter interactions.

Purpose of the Study:

  • To fabricate GNDAs using a high-throughput method.
  • To investigate the plasmonic properties of GNDAs in the mid-infrared region.
  • To demonstrate the application of GNDAs in plasmon-enhanced infrared spectroscopy.

Main Methods:

  • Block copolymer lithography was employed for high-throughput fabrication of GNDAs.
  • Optical characterization was performed to analyze plasmonic resonances.
  • Plasmon-enhanced infrared spectroscopy experiments were conducted.

Main Results:

  • GNDAs exhibited strong broadband plasmonic resonances in the mid-infrared (mid-IR) spectrum.
  • High localized field enhancement was observed due to the plasmonic resonances.
  • Reliable sensitivity and selectivity were achieved in plasmon-enhanced infrared spectroscopy.

Conclusions:

  • Block copolymer lithography is an effective method for producing GNDAs.
  • GNDAs possess significant potential for advanced spectroscopic techniques.
  • The developed GNDA platform enables sensitive and selective mid-IR spectroscopy.