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Related Experiment Video

Updated: May 2, 2026

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation

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Published on: September 27, 2011

Surface-Enhanced Infrared Absorption on Arranged Pt Nanoantennas.

Shunsuke Tanaka^1,2, Kota Maeki¹, Jun Yoshinobu¹

¹The Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba, Japan.

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry

|March 2, 2026

Summary

Platinum nanoantennas exhibit surface plasmon responses, enabling enhanced infrared absorption for chemical reactions. This research advances catalytic technologies by using plasmonics to selectively excite molecular vibrations.

Keywords:

Pt Nanoantenna benzene surface plasmon surface‐enhanced infrared absorption

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Area of Science:

Materials Science
Physical Chemistry
Nanotechnology

Background:

Surface plasmon-driven reactions offer potential for targeted chemical processes.
Integrating plasmonics with heterogeneous catalysis requires chemically active metals like platinum (Pt).

Purpose of the Study:

To fabricate and characterize Pt nanoantennas for surface plasmon resonance (SPR) studies.
To investigate the potential of Pt nanoantennas for surface-enhanced infrared absorption (SEIRA) spectroscopy.

Main Methods:

Fabrication of Pt nanoantennas on a silicon substrate.
Infrared transmission absorption measurements to analyze SPR.
Adsorption of benzene molecules to measure SEIRA spectra.

Main Results:

Observed transmission absorption bands attributed to SPR in Pt nanoantennas.
Resonance energy decreased and linewidth narrowed with increasing nanoantenna length, similar to gold (Au) nanoantennas.
Achieved a surface-enhancement factor of approximately 900 for the C-C stretching mode of benzene.

Conclusions:

Pt nanoantennas exhibit SPR and electric field enhancement in the infrared region.
Demonstrated the potential of Pt nanoantennas for SEIRA spectroscopy.
This work is a significant step towards catalytic applications utilizing infrared surface plasmons for selective vibrational mode excitation.