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Femtosecond Laser Direct Writing of Plasmonic Ag/Pd Alloy Nanostructures Enables Flexible Integration of Robust SERS Substrates
- Source :
- Advanced Materials Technologies. 2:1600270
- Publication Year :
- 2017
- Publisher :
- Wiley, 2017.
-
Abstract
- This paper demonstrates femtosecond laser direct writing mediated flexible integration of plasmonic Ag/Pd alloy nanostructures that can be potentially used as a robust surface-enhanced Raman spectroscopy substrate inside the microfluidic chip. Silver–palladium alloy with controllable composition ratio can be patterned into plasmonic nanostructures due to two-photon absorption induced coreduction of silver/palladium double metal ions. Since the alloy structures can effectively protect the silver from oxidation, thus they can facilitate the stable on-chip detection devices with long lifetime. The as-fabricated silver–palladium alloy substrate with 18% content of palladium maintains a relatively high enhancement factor of about 2.62 × 108 while at the same time demonstrating the best stability against aerobic oxidation, as it is stable for up to 20 d under ambient aerobic conditions, exhibiting a significant improvement compared to those unprotected silver substrates which have a limited lifetime of only 3 or 4 d.
- Subjects :
- Materials science
Nanostructure
Alloy
chemistry.chemical_element
Nanotechnology
02 engineering and technology
Substrate (electronics)
engineering.material
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Industrial and Manufacturing Engineering
0104 chemical sciences
symbols.namesake
chemistry
Mechanics of Materials
Femtosecond
symbols
engineering
General Materials Science
0210 nano-technology
Absorption (electromagnetic radiation)
Raman spectroscopy
Plasmon
Palladium
Subjects
Details
- ISSN :
- 2365709X
- Volume :
- 2
- Database :
- OpenAIRE
- Journal :
- Advanced Materials Technologies
- Accession number :
- edsair.doi...........8249bfdfc28cb81999cc6c6fe0c363d7