Investigating the catalytic activity of plasmonic nanostructures by SERS
| Full text | |
| Author(s): |
Reyes Gomez, Faustino
[1, 2]
;
Rubira, Rafael J. G.
[3]
;
Camacho, Sabrina A.
[3]
;
Martin, Cibely S.
[3]
;
da Silva, Robson R.
[4]
;
Constantino, Carlos J. L.
[3]
;
Alessio, Priscila
[3]
;
Oliveira, Jr., Osvaldo N.
[4]
;
Ricardo Mejia-Salazar, J.
[4, 5]
Total Authors: 9
|
| Affiliation: | [1] Univ Valle, Dept Fis, Cali 25360 - Colombia
[2] Univ Cantabria, Dept Appl Phys, Avda Los Castros S-N, E-39005 Santander - Spain
[3] Sao Paulo State Univ UNESP, Sch Technol & Appl Sci, Campus Presidente Prudente, BR-19060900 Sao Paulo - Brazil
[4] Univ Sao Paulo, Sao Carlos Inst Phys, POB 369, BR-13560970 Sao Carlos, SP - Brazil
[5] Natl Inst Telecommun Inatel, BR-37540000 Santa Rita Do Sapucai, MG - Brazil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | SENSORS; v. 18, n. 11 NOV 2018. |
| Web of Science Citations: | 0 |
| Abstract | |
The recent development of silver nanostars (Ag-NSs) is promising for improved surface-enhanced sensing and spectroscopy, which may be further exploited if the mechanisms behind the excitation of localized surface plasmon resonances (LSPRs) are identified. Here, we show that LSPRs in Ag-NSs can be obtained with finite-difference time-domain (FDTD) calculations by considering the nanostars as combination of crossed nanorods (Ag-NRs). In particular, we demonstrate that an apparent tail at large wavelengths (lambda greater than or similar to 700 nm) observed in the extinction spectra of Ag-NSs is due to a strong dipolar plasmon resonance, with no need to invoke heterogeneity (different number of arms) effects as is normally done in the literature. Our description also indicates a way to tune the strongest LSPR at desired wavelengths, which is useful for sensing applications. (AU) | |
| FAPESP's process: | 16/06612-6 - Printed and implantable biosensor made from biopolymers for long-term monitoring |
| Grantee: | Robson Rosa da Silva |
| Support type: | Scholarships in Brazil - Post-Doctorate |
| FAPESP's process: | 16/12311-9 - Transversal magneto-optical Kerr effect for the design and development of biosensors |
| Grantee: | Jorge Ricardo Mejía Salazar |
| Support type: | Scholarships in Brazil - Post-Doctorate |
| FAPESP's process: | 13/14262-7 - Nanostructured films from biologically-relevant materials |
| Grantee: | Osvaldo Novais de Oliveira Junior |
| Support type: | Research Projects - Thematic Grants |
| FAPESP's process: | 16/09634-0 - Interaction between biomembrane models based on Langmuir films and giant unilamellar vesicles (GUVs) with triazine herbicides and detection via SERS spectroscopy |
| Grantee: | Rafael Jesus Gonçalves Rubira |
| Support type: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 13/01897-4 - Synthesis of gold nanoparticles for enhancement of Raman Scattering (SERS) and fluorescence (SEF) targeting sensory applications |
| Grantee: | Sabrina Aléssio Camacho |
| Support type: | Scholarships in Brazil - Doctorate |