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Nanofunctionalization of Additively Manufactured Titanium Substrates for Surface-Enhanced Raman Spectroscopy
Marcin Pisarek1, Robert Ambroziak1, Marcin Hołdyński1
1Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
Materials (Basel, Switzerland)
|May 20, 2022
Summary
Researchers developed novel 3D titanium substrates using laser powder bed fusion for surface-enhanced Raman scattering (SERS) measurements. These 3D titanium substrates offer high stability and repeatability for SERS applications.
Area of Science:
- Additive Manufacturing
- Nanotechnology
- Analytical Chemistry
Background:
- Powder bed fusion using a laser beam (PBF-LB) is a key additive manufacturing technique for metal parts.
- Surface-enhanced Raman scattering (SERS) requires efficient substrates for sensitive chemical detection.
Purpose of the Study:
- To demonstrate the feasibility of producing 3D titanium substrates via PBF-LB for SERS.
- To develop and characterize nanoscale modifications for enhanced SERS performance.
Main Methods:
- Fabrication of 3D titanium substrates using PBF-LB.
- Anodic oxidation to create TiO2 nanotubes (~80 nm diameter).
- Magnetron sputtering to deposit silver nanoparticles.
Main Results:
- Achieved highly efficient SERS substrates with an average enhancement factor of 1.26 × 10^6 for pyridine.
- Demonstrated high stability and repeatability of SERS measurements.
- Characterized substrate morphology, structure, and composition using SEM, XPS, and XRD.
Conclusions:
- PBF-LB technology can be utilized to create advanced 3D titanium SERS substrates.
- Nanoscale modification with TiO2 nanotubes and silver nanoparticles significantly boosts SERS efficiency.
- This approach opens new avenues for designing SERS substrates in analytical chemistry.
