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Graded nanowell arrays: a fine plasmonic "library" with an adjustable spectral range
Peihong Xue1, Shunsheng Ye, Hongyang Su
1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China. zjh@jlu.edu.cn.
Nanoscale
|May 10, 2017
Summary
Researchers created graded plasmonic arrays using micro-/nanostructures. These arrays act as a fine plasmonic library (FPL) for controlling spectral ranges and have applications in sensing and materials screening.
Area of Science:
- Plasmonics
- Nanotechnology
- Optical Materials
Background:
- Ordered micro-/nanostructures are crucial for advanced optical applications.
- Fabricating structures with controlled geometric gradients presents a significant challenge.
Purpose of the Study:
- To develop an effective method for fabricating graded plasmonic arrays.
- To investigate the properties and potential applications of these graded arrays.
Main Methods:
- Colloidal lithography for ordered arrays.
- Inclined reactive ion etching for geometric gradient creation.
- Surface plasmon resonance (SPR) peak measurement along the gradient.
Main Results:
- Successfully fabricated Ag nanowell arrays with a geometric gradient.
- Observed gradual shifts in SPR peaks along the array.
- Demonstrated the array's function as a fine plasmonic library (FPL) with tunable spectral ranges.
- Achieved high spectral resolution (0.5 nm wavelength shift).
Conclusions:
- The fabricated graded plasmonic arrays serve as a fine plasmonic library (FPL).
- The FPL offers precise control over spectral ranges via lattice constant and pore diameter.
- Potential applications include surface-enhanced Raman scattering (SERS) verification, high-throughput screening, and multiplex sensing.
