Alkoxysilane-Mediated Decoration of Si Nanowires Vertical Arrays with Au Nanoparticles as Improved SERS-Active Platforms
Abstract
:1. Introduction
2. Results and Discussion
2.1. Silicon Nanowires Fabrication
2.2. Alkoxysilanes Grafting of the Si NW Surface
2.3. Decorating Si NWs with Gold Nanoparticles
2.4. Electron Microscopy Analysis of Au NP-Decorated Si NWs
2.5. Surface Enhanced Raman Scattering Analysis
3. Experiment Details
3.1. Materials
3.2. Au Nanoparticles Synthesis
3.3. Dynamic Light Scattering Measurements
3.4. Si nanowires Synthesis
3.5. Si Nanowires Surface Functionalization
3.6. Scanning Electron Microscopy
3.7. Surface-Enhanced Raman Scattering Measurements
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Au NPs onto Si NWs. Samples | Average NP Diameter (nm) |
---|---|
Si NW/Au NP | 19.2 ± 5.7 |
APTES-Si NW/Au NP | 17.5 ± 6.4 |
MPTMS-Si NW/Au NP | 29.4 ± 11.9 |
GPTMS-Si NW/Au NP | 26.5 ± 8.3 |
Au NPs onto Si NW Samples | ISERS/IAu Film @ 450 cm−1 | ISERS/IAu Film @ 1625 cm−1 | ISERS/IAu Film @ 450 cm−1 | ISERS/IAu Film @ 1625 cm−1 | EF | EF |
---|---|---|---|---|---|---|
λ = 785 nm | λ = 785 nm | λ = 633 nm | λ = 633 nm | λ = 785 nm | λ = 633 nm | |
GPTMS-Si NW/Au NP | 78.7 | 83.0 | 63.4 | 93.0 | 2.9 @ 450 cm−1 | 10.8 @ 450 cm−1 |
2.6 @ 1625 cm−1 | 5.3 @ 1625 cm−1 | |||||
Si NW/Au NP | 55.9 | 67.6 | 39.6 | 65.3 | 2.5 @ 450 cm−1 | 10.4 @ 450 cm−1 |
2.4 @ 1625 cm−1 | 7.4 @ 1625 cm−1 | |||||
GPTMS-Si Bulk/Au NP | 31.1 | 31.6 | 5.9 | 17.6 | ||
Si Bulk/Au NP | 19.4 | 27.9 | 3.8 | 8.8 |
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Lo Faro, M.J.; Ielo, I.; Morganti, D.; Leonardi, A.A.; Conoci, S.; Fazio, B.; De Luca, G.; Irrera, A. Alkoxysilane-Mediated Decoration of Si Nanowires Vertical Arrays with Au Nanoparticles as Improved SERS-Active Platforms. Int. J. Mol. Sci. 2023, 24, 16685. https://doi.org/10.3390/ijms242316685
Lo Faro MJ, Ielo I, Morganti D, Leonardi AA, Conoci S, Fazio B, De Luca G, Irrera A. Alkoxysilane-Mediated Decoration of Si Nanowires Vertical Arrays with Au Nanoparticles as Improved SERS-Active Platforms. International Journal of Molecular Sciences. 2023; 24(23):16685. https://doi.org/10.3390/ijms242316685
Chicago/Turabian StyleLo Faro, Maria Josè, Ileana Ielo, Dario Morganti, Antonio Alessio Leonardi, Sabrina Conoci, Barbara Fazio, Giovanna De Luca, and Alessia Irrera. 2023. "Alkoxysilane-Mediated Decoration of Si Nanowires Vertical Arrays with Au Nanoparticles as Improved SERS-Active Platforms" International Journal of Molecular Sciences 24, no. 23: 16685. https://doi.org/10.3390/ijms242316685