Engineering SERS Properties of Silicon Nanotrees at the Nanoscale
Abstract
:1. Introduction
2. Experimental
2.1. Substrate Preparation
2.2. Characterization Techniques
2.3. Silicon Nanotree Synthesis
- (a)
- High-density trunk nanostructure growth
- (b)
- Branch synthesis
3. Results
3.1. Morphology of SiNTR
3.1.1. Synthesis Method A—Temperature Dependence on SiNTr Growth
3.1.2. Synthesis Method B—Branch Density in Correlation with Cycle Numbers
3.2. The Flexibility of the Structure in Correlation with Metal Plating
3.3. SERS
4. Discussion
4.1. Discussion on NTr Nanostructure and SERS
4.2. Additional Optimization Parameters
4.3. Issues and Limitations
5. Conclusions
- Branches can be successfully synthesized during simultaneous temperature and gas pressure decrease
- The high number of trunks per unit area can be achieved using Ag-Au catalysts
- Forming gas improves branch synthesis
- The synthesis temperature for branch growth should be above 500 °C, while 0.25 mbar SiH4 shots are used
- Metal plating should be below 20 nm to preserve branch elasticity
- Trunk regrowth can be diminished by minimizing shot/cycle duration and number
- Branches contribute to SERS, however, there is a certain density that should not be traversed
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Gebavi, H.; Pál, P.; Csarnovics, I.; Gašparić, V.; Ivanda, M. Engineering SERS Properties of Silicon Nanotrees at the Nanoscale. Chemosensors 2022, 10, 534. https://doi.org/10.3390/chemosensors10120534
Gebavi H, Pál P, Csarnovics I, Gašparić V, Ivanda M. Engineering SERS Properties of Silicon Nanotrees at the Nanoscale. Chemosensors. 2022; 10(12):534. https://doi.org/10.3390/chemosensors10120534
Chicago/Turabian StyleGebavi, Hrvoje, Petra Pál, István Csarnovics, Vlatko Gašparić, and Mile Ivanda. 2022. "Engineering SERS Properties of Silicon Nanotrees at the Nanoscale" Chemosensors 10, no. 12: 534. https://doi.org/10.3390/chemosensors10120534