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Engineering 3D Nanoplasmonic Assemblies for High Performance Spectroscopic Sensing.

S Dinda^1,2, V Suresh¹, P Thoniyot^1,3

¹Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 3, Research Link, Singapore 117602, Singapore.

ACS Applied Materials & Interfaces

|November 3, 2015

Summary

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This summary is machine-generated.

Researchers created gold nanopillar sensors using self-assembling polymer micelles. These sensors feature small gaps for highly sensitive molecular detection via Surface Enhanced Raman Spectroscopy (SERS).

Area of Science:

Nanotechnology
Materials Science
Spectroscopy

Background:

Plasmonic sensors require precise control over nanostructure dimensions for optimal performance.
Fabricating uniform nanopillar arrays with sub-10 nm gaps has been a significant challenge.
Surface Enhanced Raman Spectroscopy (SERS) offers high sensitivity for molecular detection but relies on suitable nanostructured substrates.

Purpose of the Study:

To develop a scalable method for fabricating plasmonic sensors with controlled nanopillar arrays.
To achieve uniform sub-10 nm gaps in gold nanopillar arrays for enhanced SERS detection.
To demonstrate the versatility of self-assembly techniques in nanoplasmonic sensor fabrication.

Main Methods:

Utilizing amphiphilic diblock copolymer micelles for self-assembly on silicon substrates.

Keywords:

nanopillar plasmonic nanoarrays self-assembly sensing surface enhanced raman spectroscopy (SERS)

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Employing copolymer micelles as lithographic templates to create silicon nanopillars.

Controlling the gap size between gold features by precise control over evaporated gold thickness.

Main Results:

Fabrication of high-integrity silicon nanopillar arrays over large areas.
Creation of gold nanopillar arrays with engineered topography and uniform sub-10 nm separations.
Demonstrated suitability of the fabricated arrays for highly sensitive molecular analyte detection using SERS.

Conclusions:

The self-assembly approach offers a promising route for fabricating nanoplasmonic sensor assemblies.
This method allows for control over critical parameters like resolution, throughput, and sensing performance.
The developed technique addresses key trade-offs in nanoplasmonic sensor fabrication for advanced sensing applications.