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Interfacial Interaction Monitoring And Constitutional Isomer Discrimination Using A Graphene-integrated Terahertz Metasurface.

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Interfacial Interaction Monitoring And Constitutional Isomer Discrimination Using A Graphene-integrated Terahertz Metasurface.

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Interfacial Interaction Monitoring and Constitutional Isomer Discrimination Using a Graphene-Integrated Terahertz

Taeyeon Kim^1,2, Jaehun Park^1,2, Seongwon Gim³

¹KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Republic of Korea.

Analytical Chemistry

|March 11, 2026

View abstract on PubMed

Summary

This summary is machine-generated.

This study introduces a graphene-integrated terahertz metasurface for nondestructive isomer discrimination. The platform achieves highly sensitive, label-free identification of constitutional isomers on-chip.

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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

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Published on: December 27, 2012

Area of Science:

Terahertz spectroscopy
Materials science
Analytical chemistry

Background:

Isomer identification is crucial for molecular design and quality control.
Conventional methods for isomer analysis are often destructive or require large sample volumes.
On-chip, nondestructive isomer discrimination remains a significant analytical challenge.

Purpose of the Study:

To develop a novel platform for nondestructive, on-chip constitutional isomer discrimination.
To enable sensitive monitoring of molecular behavior at interfaces.
To overcome limitations of existing analytical techniques for isomer analysis.

Main Methods:

Integration of a graphene layer onto a terahertz metasurface with nanoslot cavities.
Utilizing a floated graphene monolayer as an active probing pad for terahertz field confinement.

Measuring graphene-analyte interaction rate and conductivity changes for isomer differentiation.

Main Results:

Achieved nondestructive, on-chip constitutional isomer discrimination using a compact metasurface.
Demonstrated a nanogram scale limit of detection for molecular analysis.
Successfully distinguished constitutional isomers based on their electronic properties and interfacial interactions.

Conclusions:

The proposed graphene-integrated terahertz metasurface offers a sensitive, label-free method for isomer discrimination.
The platform enables on-chip monitoring of molecular behavior with high efficiency and low sample volume.
This technology holds promise for advanced molecular characterization and tracking in various applications.