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Related Experiment Video

Updated: Mar 22, 2026

Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance

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Published on: April 1, 2013

Topographically Engineered Large Scale Nanostructures for Plasmonic Biosensing.

Bo Xiao¹, Sangram K Pradhan¹, Kevin C Santiago¹

¹Department of Engineering and Center for Materials Research, Norfolk State University, Norfolk, VA 23504, USA.

Scientific Reports

|April 14, 2016

Summary

This summary is machine-generated.

We developed a scalable nanofabrication method for metal nanogratings, achieving enhanced optical transmission and sharp resonances. This enables sensitive, label-free biosensing for detecting interactions like protein-protein binding.

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Last Updated: Mar 22, 2026

Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance

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Published on: April 1, 2013

Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics

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Published on: May 28, 2016

Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment

Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment

Published on: April 4, 2017

Area of Science:

Nanotechnology
Plasmonics
Optical Engineering

Background:

Nanostructured metal thin films offer unique optical properties.
Enhanced transmission and sharp resonances are desirable for optical applications.
Scalable nanofabrication is crucial for practical implementation.

Purpose of the Study:

To demonstrate enhanced transmission and sharp resonances in nanostructured metal films.
To develop a large-scale, high-throughput nanofabrication technique for plasmonic structures.
To utilize these structures for sensitive, label-free biosensing.

Main Methods:

Combining nanoimprint and soft lithography for nanoscale patterning of metal thin films.
Fabricating metal nanogratings with high throughput.
Utilizing spatial Fourier transformation for analytical understanding of optical phenomena.
Integrating nanostructures with microfluidic cells for real-time monitoring.

Main Results:

Achieved up to a one-order-of-magnitude enhancement in optical transmission.
Observed sharp resonances with a full width at half maximum (FWHM) of ~15 nm.
Demonstrated sensitivity to changes in the surrounding refractive index.
Successfully applied the platform for real-time monitoring of protein-protein interactions.

Conclusions:

The developed nanofabrication technique enables efficient production of plasmonic nanostructures.
The nanostructures exhibit significant optical enhancement and environmental sensitivity.
The platform provides a feasible, label-free approach for surface plasmon resonance (SPR) biosensing without complex instrumentation.