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Related Experiment Video

Updated: Jan 23, 2026

Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics

Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics

Published on: May 28, 2016

Dual nanotransfer printing for complementary plasmonic biosensors.

Sang-Ho Shin^1,2, Sung-Ho Shin³, Jun-Hyuk Choi²

¹Department of Electrical Engineering, College of Engineering, Korea University, Seoul 02841, Republic of Korea.

|June 25, 2019

Summary

Fabricating large-area, low-cost plasmonic biosensors is now feasible using dual nanotransfer printing (NTP). This method enhances sensitivity by optimizing nanostructure etching for improved analyte access to near-fields.

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Area of Science:

Nanotechnology
Plasmonics
Biosensing

Background:

Localized plasmon resonance (LPR)-based biosensors offer high sensitivity but face fabrication challenges for large-area, low-cost applications.
Existing methods for creating plasmonic nanostructures are often complex and expensive, hindering widespread adoption.

Purpose of the Study:

To develop a cost-effective and scalable method for fabricating large-area plasmonic nanostructures for biosensing.
To optimize the fabrication process to enhance the sensitivity of nanohole and nanodisk array biosensors.

Main Methods:

Utilized dual nanotransfer printing (NTP) with a single metal deposition and a reusable mold to create nanohole and nanodisk arrays.
Employed a subsequent dry etching process to fabricate suspended nanohole and nanodisk arrays.
Controlled vertical and lateral etching depths of the dielectric layer beneath the gold (Au) nanostructures.

Main Results:

Achieved large-area fabrication of complementary plasmonic biosensors (nanohole and nanodisk arrays) at low cost.
Demonstrated maximum enhancement in bulk sensitivity through optimized etching of the dielectric layer.
Observed increased surface sensitivity due to improved analyte access to near-fields at the nanostructure base.

Conclusions:

The dual NTP method presents a practical and cost-effective solution for large-area, label-free plasmonic biosensing.
Optimized etching control is crucial for maximizing sensitivity in plasmonic nanostructure-based biosensors.
This fabrication approach simplifies the process for creating complementary plasmonic structures and metasurfaces.