Surface-Enhanced Raman Scattering on Dendrimer/Metallic Nanoparticle Layer-by-Layer Film Substrates

Langmuir ◽  
2005 ◽  
Vol 21 (12) ◽  
pp. 5576-5581 ◽  
Author(s):  
Paul J. G. Goulet ◽  
David S. dos Santos, ◽  
Ramón A. Alvarez-Puebla ◽  
Osvaldo N. Oliveira, ◽  
Ricardo F. Aroca
Keyword(s):  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Layer By Layer ◽  
Metallic Nanoparticle ◽  
Layer Film ◽  
Nanoparticle Layer ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

Collapse-Induced Multimer Formation of Self-Assembled Nanoparticles for Surface Enhanced Raman Scattering

Coatings ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 76
Author(s):  
Ju Young Kim ◽  
Young Taek Oh ◽  
Su Eon Lee ◽  
Jun Hyun Park ◽  
Shin Park ◽  
...  
Keyword(s):  
Electric Field ◽  
Raman Scattering ◽  
Field Intensity ◽  
Electric Field Intensity ◽  
Surface Enhanced Raman Scattering ◽  
Metallic Nanoparticle ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Self Assembled

Metallic nanoparticle ensemble, with narrow inter-particle distance, is a useful element for diverse optical devices due to highly enhanced electric field intensity at the gap. Self-assembly of block copolymer (BCP) can provide the versatile solution to fabricate precise nanostructures, but this methodology has the intrinsic limitation to realize optically coupled metallic multimer geometry with narrow inter-particle distance. This is because BCP-based nanotemplate possesses a minimum size limit for interparticle distance imposed by its thermodynamic restriction. Herein, we investigate the facile formation of metallic multimer with scalability and area-selectivity through the collapse of self-assembled BCP nanopattern. The capillary-force-induced collapse phenomenon enables a spatial transformation of lateral regular ordering in metallic nanoparticle array and enhances electric field intensity. The fabrication of this metallic nanoparticle ensemble from BCP lithography is successfully utilized for surface enhanced Raman scattering (SERS). The enhancement factor of metal nanoparticle multimer is calculated as ~6.74 × 105 at 1000 cm−1, 2.04 × 106 at 1022 cm−1, and 6.11 × 106 at 1580 cm−1, respectively.

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