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Fabrication of Periodic Gold Nanocup Arrays Using Colloidal Lithography
Published on: September 2, 2017
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Shape Modulation of Plasmonic Nanostructures by Unconventional Lithographic Technique
Adriano Colombelli1, Daniela Lospinoso1, Roberto Rella1
1CNR-IMM, Institute for Microelectronic and Microsystems, University Campus Ecotekne, Via per Monteroni, 73100 Lecce, Italy.
Nanomaterials (Basel, Switzerland)
|February 15, 2022
Summary
Researchers developed a new method to create ordered arrays of nanoholes in metal films using nanosphere lithography. This technique allows for tunable plasmonic properties, ideal for biosensing and enhanced spectroscopy applications.
Area of Science:
- Materials Science
- Nanotechnology
- Plasmonics
Background:
- Conventional nanosphere lithography enables the fabrication of nanostructures.
- Sub-wavelength nanoholes in metal films are of interest for their optical properties.
Purpose of the Study:
- To extend nanosphere lithography for creating periodic arrays of nanoholes.
- To explore the transition from nanoprisms to nanohole arrays.
- To investigate the plasmonic properties of these nano-structured materials.
Main Methods:
- Utilizing dry etching of self-assembled polystyrene colloid monolayers.
- Employing metal physical deposition.
- Applying optical absorbance measurements for quality control of nanosphere monolayers.
Main Results:
- Successfully fabricated highly periodic arrays of sub-wavelength nanoholes.
- Demonstrated precise modulation of plasmonic properties.
- Developed a rapid, non-invasive inspection method for colloid dimensions.
Conclusions:
- The developed method allows for low-cost, reproducible fabrication of plasmonic materials.
- The nano-structured materials are suitable for biosensing and Raman enhanced effects.
- Optical absorbance measurements provide an effective evaluation of colloid dimensions for large-area fabrication.
