Fabrication of Gold-Coated Ultra-Thin Anodic Porous Alumina Substrates for Augmented SERS
Abstract
:1. Introduction
2. Results and Discussion
2.1. utAPA‑Au Substrate Preparation
2.2. SERS Measurements
2.3. Numerical Simulations
3. Materials and Methods
3.1. Au‑utAPA Substrate Preparation
3.2. Raman Measurements
3.3. Simulations
4. Conclusions
Supplementary Materials
Acknowledgments
Author Contributions
Conflicts of Interest
Abbreviations
APA | anodic porous alumina |
tAPA | thin APA |
utAPA | ultra-thin APA |
Al | aluminum |
Au | gold |
Si | silicon |
FIT | finite integration technique |
SERS | surface-enhanced Raman scattering |
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APA Type | Protocol | V (V) | D (nm) | σ (1010 cm−2) | d (nm) | w (nm) | w/d | w/D |
---|---|---|---|---|---|---|---|---|
tAPA 500 nm | Phosphoric acid | 110 | 247 | 0.21 | 66 | 181 | 2.74 | 0.73 |
tAPA 500 nm | Phosphoric acid + pore opening | 110 | 234 | 0.23 | 157 | 77 | 0.49 | 0.33 |
tAPA 100 nm | Oxalic acid | 40 | 94 | 1.44 | 21 | 73 | 3.48 | 0.78 |
tAPA 100 nm | Oxalic acid + pore opening | 40 | 103 | 1.20 | 82 | 21 | 0.26 | 0.20 |
utAPA | Sulfuric acid + pore opening | 20 | 41 | 7.6 | 13 | 28 | 2.15 | 0.68 |
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Toccafondi, C.; Proietti Zaccaria, R.; Dante, S.; Salerno, M. Fabrication of Gold-Coated Ultra-Thin Anodic Porous Alumina Substrates for Augmented SERS. Materials 2016, 9, 403. https://doi.org/10.3390/ma9060403
Toccafondi C, Proietti Zaccaria R, Dante S, Salerno M. Fabrication of Gold-Coated Ultra-Thin Anodic Porous Alumina Substrates for Augmented SERS. Materials. 2016; 9(6):403. https://doi.org/10.3390/ma9060403
Chicago/Turabian StyleToccafondi, Chiara, Remo Proietti Zaccaria, Silvia Dante, and Marco Salerno. 2016. "Fabrication of Gold-Coated Ultra-Thin Anodic Porous Alumina Substrates for Augmented SERS" Materials 9, no. 6: 403. https://doi.org/10.3390/ma9060403