scholarly journals Real-time optofluidic surface-enhanced Raman spectroscopy based on a graphene oxide/gold nanorod nanocomposite

2018 ◽  
Vol 26 (18) ◽  
pp. 22698 ◽  
Author(s):  
Pilar G. Vianna ◽  
Daniel Grasseschi ◽  
Sergio H. Domingues ◽  
Christiano J. S. de Matos
Keyword(s):  
Raman Spectroscopy ◽  
Graphene Oxide ◽  
Real Time ◽  
Surface Enhanced Raman Spectroscopy ◽  
Gold Nanorod ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Graphene Oxide/Gold Nanorod Nanocomposite for Stable Surface-Enhanced Raman Spectroscopy

ACS Photonics ◽  
2016 ◽  
Vol 3 (6) ◽  
pp. 1027-1035 ◽  
Author(s):  
Pilar G. Vianna ◽  
Daniel Grasseschi ◽  
Greice K. B. Costa ◽  
Isabel C. S. Carvalho ◽  
Sergio H. Domingues ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Graphene Oxide ◽  
Surface Enhanced Raman Spectroscopy ◽  
Gold Nanorod ◽  
Stable Surface ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

scholarly journals Silver-Nanoparticle-Decorated Gold Nanorod Arrays via Bioinspired Polydopamine Coating as Surface-Enhanced Raman Spectroscopy (SERS) Platforms

Coatings ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 198 ◽  
Author(s):  
Mehmet Yilmaz
Keyword(s):  
Raman Spectroscopy ◽  
Deposition Time ◽  
Surface Enhanced Raman Spectroscopy ◽  
Gold Nanorod ◽  
Nanorod Arrays ◽  
Plasmonic Material ◽  
Relative Standard ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Controlled Deposition

The controlled deposition of nanoparticles onto 3-D nanostructured films is still facing challenges due to the uncontrolled aggregation of colloidal nanoparticles. In the context of this study, a simple yet effective approach is demonstrated to decorate the silver nanoparticles (AgNP) onto the 3-D and anisotropic gold nanorod arrays (GNAs) through a bioinspired polydopamine (PDOP) coating to fabricate surface-enhanced Raman spectroscopy (SERS) platforms. Since the Raman reporter molecules (methylene blue, MB, 10 µM) were not adsorbed directly on the surface of the plasmonic material, a remarkable decrease in SERS signals was detected for the PDOP-coated GNAs (GNA@PDOP) platforms. However, after uniform and well-controlled AgNP decoration on the GNA@PDOP (GNA@PDOP@AgNP), huge enhancement was observed in SERS signals from the resultant platform due to the synergistic action which originated from the interaction of GNAs and AgNPs. I also detected that PDOP deposition time (i.e., PDOP film thickness) is the dominant parameter that determines the SERS activity of the final system and 30 min of PDOP deposition time (i.e., 3 nm of PDOP thickness) is the optimum value to obtain the highest SERS signal. To test the reproducibility of GNA@PDOP@AgNP platforms, relative standard deviation (RSD) values for the characteristic peaks of MB were found to be less than 0.17, demonstrating the acceptable reproducibility all over the proposed platform. This report suggests that GNA@PDOP@AgNP system may be used as a robust platform for practical SERS applications.

3D silver nanoparticles with multilayer graphene oxide as a spacer for surface enhanced Raman spectroscopy analysis

Nanoscale ◽  
2018 ◽  
Vol 10 (13) ◽  
pp. 5897-5905 ◽  
Author(s):  
Zhen Li ◽  
Shouzhen Jiang ◽  
Yanyan Huo ◽  
Tingyin Ning ◽  
Aihua Liu ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Surface Enhanced Raman Spectroscopy ◽  
Multilayer Graphene ◽  
Spectroscopy Analysis ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

We explore the variation of SERS performance towards two different Ag NP layers using multilayer GO as a spacer.

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