TY - JOUR
T1 - Laser-induced surface structures on gold-coated polymers
T2 - Influence of morphology on surface-enhanced Raman scattering enhancement
AU - Rebollar, Esther
AU - Hernández, Margarita
AU - Sanz, Mikel
AU - Pérez, Susana
AU - Ezquerra, Tiberio A.
AU - Castillejo, Marta
N1 - Publisher Copyright:
© 2015 Wiley Periodicals, Inc.
PY - 2015/12/1
Y1 - 2015/12/1
N2 - The fabrication of highly sensitive and reproducible substrates for Surface-Enhanced Raman Scattering (SERS) remains a challenging scientific and technological issue. In this work, laser-induced periodic surface structures are generated on poly(trimethylen terephthalate) films upon laser irradiation with the linearly polarized beams of a Nd:YAG laser (4th harmonic, 266 nm), an ArF excimer laser (193 nm), and a Titanium:sapphire laser (795 nm), resulting in periods close to the laser wavelength when irradiating at normal incidence, and larger periods for different angles of incidence. Additional irradiation with a circularly polarized beam at 266 nm produces superficial circular structures. The nanostructured polymers are coated with a nanoparticle assembled gold layer by pulsed laser deposition at 213 nm. The capabilities of these substrates for SERS are evaluated using benzenethiol as a test molecule and different degrees of Raman signal enhancement are observed depending on the nanostructure type. The highest enhancement factor is obtained by for nanostructured substrates with the highest values of period, depth, and roughness.
AB - The fabrication of highly sensitive and reproducible substrates for Surface-Enhanced Raman Scattering (SERS) remains a challenging scientific and technological issue. In this work, laser-induced periodic surface structures are generated on poly(trimethylen terephthalate) films upon laser irradiation with the linearly polarized beams of a Nd:YAG laser (4th harmonic, 266 nm), an ArF excimer laser (193 nm), and a Titanium:sapphire laser (795 nm), resulting in periods close to the laser wavelength when irradiating at normal incidence, and larger periods for different angles of incidence. Additional irradiation with a circularly polarized beam at 266 nm produces superficial circular structures. The nanostructured polymers are coated with a nanoparticle assembled gold layer by pulsed laser deposition at 213 nm. The capabilities of these substrates for SERS are evaluated using benzenethiol as a test molecule and different degrees of Raman signal enhancement are observed depending on the nanostructure type. The highest enhancement factor is obtained by for nanostructured substrates with the highest values of period, depth, and roughness.
KW - Applications
KW - Coatings
KW - Nanostructured polymers
KW - Spectroscopy
KW - Surfaces and interfaces
UR - https://www.scopus.com/pages/publications/84940900847
U2 - 10.1002/app.42770
DO - 10.1002/app.42770
M3 - Article
AN - SCOPUS:84940900847
SN - 0021-8995
VL - 132
JO - Journal of Applied Polymer Science
JF - Journal of Applied Polymer Science
IS - 45
M1 - 42770
ER -