scholarly journals Fabrication and Characterization of Biplasmonic Substrates Obtained by Picosecond Laser Pulses

2020 ◽  
Vol 10 (17) ◽  
pp. 5938
Author(s):  
Andrei Stochioiu ◽  
Catalin Luculescu ◽  
Irina Alexandra Paun ◽  
Luiza-Izabela Jinga ◽  
Constantin Stochioiu

Bimetallic nanostructures have the potential to become the new generation candidates for applications in catalysis, electronics, optoelectronics, biosensors and also for surface-enhanced Raman Spectroscopy (SERS). The bimetallic nanocrystals offer additional properties over the single metal components such as improved electromagnetic properties and corrosion protection. This work presents a simple and inexpensive method to fabricate large area biplasmonic (bimetallic) substrates, employing DC magnetron sputtering, picosecond laser pulses and a digital galvanometric scanner. The aim of this study was to achieve large area homogeneous substrates while having a good and predictable signal amplification by SERS effect. Gold thin films with 200 nm thickness were deposited on optical polished substrates and then irradiated in atmospheric air with λ = 1064 nm wavelength laser pulses with 8 ps pulse duration and 500 kHz fixed repetition rate. Various laser fluences and laser irradiation speeds were employed in order to optimize the Laser-Induced Periodic Surface Structures (LIPSS) formed on the substrate. The results are presented comparatively for the standalone Cu substrates and for the Cu-Au substrates using Raman spectral analysis on a single signal peak of a Rhodamine 6G solution.

1992 ◽  
Vol 28 (12) ◽  
pp. 1137 ◽  
Author(s):  
A. Krotkus ◽  
V. Pašiškevičius

1985 ◽  
Author(s):  
C. Cavailler ◽  
D. Gontier ◽  
J. Launspach ◽  
C. Froehly ◽  
D. Largeau ◽  
...  

1977 ◽  
Vol 15 (10) ◽  
pp. 4557-4563 ◽  
Author(s):  
J. H. Bechtel ◽  
W. Lee Smith ◽  
N. Bloembergen

2021 ◽  
Author(s):  
Igor Kuzmin ◽  
Sergey Mironov ◽  
Mikhail Martyanov ◽  
Anatoly Poteomkin ◽  
Efim Khazanov

Sign in / Sign up

Export Citation Format

Share Document