| dc.contributor | Universidade Estadual Paulista (UNESP) | |
| dc.creator | Camacho, Sabrina A. | |
| dc.creator | Aoki, Pedro H. B. | |
| dc.creator | Assis, Francisco F. de | |
| dc.creator | Pires, Ana M. | |
| dc.creator | Oliveira, Kleber T. de | |
| dc.creator | Aroca, Ricardo F. | |
| dc.creator | Constantino, Carlos J. L. | |
| dc.date | 2015-12-07T15:34:18Z | |
| dc.date | 2016-10-25T21:23:20Z | |
| dc.date | 2015-12-07T15:34:18Z | |
| dc.date | 2016-10-25T21:23:20Z | |
| dc.date | 2015 | |
| dc.date.accessioned | 2017-04-06T09:29:42Z | |
| dc.date.available | 2017-04-06T09:29:42Z | |
| dc.identifier | Applied Spectroscopy, v. 69, n. 4, p. 451-456, 2015. | |
| dc.identifier | 1943-3530 | |
| dc.identifier | http://hdl.handle.net/11449/131358 | |
| dc.identifier | http://acervodigital.unesp.br/handle/11449/131358 | |
| dc.identifier | 10.1366/14-07625 | |
| dc.identifier | 25741784 | |
| dc.identifier | http://dx.doi.org/10.1366/14-07625 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/941898 | |
| dc.description | The synergistic effect produced by metallic nanoparticles when incorporated into different systems empowers a research field that is growing rapidly. In addition, organometallic materials are at the center of intensive research with diverse applications such as light-emitting devices, transistors, solar cells, and sensors. The Langmuir-Blodgett (LB) technique has proven to be suitable to address challenges inherent to organic devices, since the film properties can be tuned at the molecular level. Here we report a strategy to incorporate gold nanoparticles (AuNPs) into the LB film by co-deposition in order to achieve surface-enhanced Raman scattering (SERS) of the zinc(II)-protoporphyrin (IX) dimethyl ester (ZnPPIX-DME). Prior to the LB co-deposition, the properties of the Langmuir monolayer of ZnPPIX-DME at the air-water interface, containing AuNPs in the subphase, are studied through the surface-pressure versus mean molecular area (π-A) isotherms. The ZnPPIX-DME+AuNPs π-A isotherm presented a significant shift to higher molecular area, suggesting an interaction between both ZnPPIX-DME molecules and AuNPs. Those interactions are a key factor allowing the co-deposition of both AuNPs and ZnPPIX-DME molecules onto a solid substrate, thus forming the LB film. SERS of ZnPPIX-DME was successfully attained, ensuring the spatial distribution of the AuNPs. Higher enhancement factors were found at AuNP aggregates, as a result of the intense local electromagnetic field found in the metal nanoparticle aggregates. The main vibrational bands observed in the SERS spectra suggest a physical adsorption of the ZnPPIX-DME onto the surface of AuNPs. The latter is not only in agreement with the interactions pointed out by the π-A isotherms but also suggests that this interaction is kept upon LB film co-deposition. | |
| dc.language | eng | |
| dc.relation | Applied Spectroscopy | |
| dc.rights | info:eu-repo/semantics/closedAccess | |
| dc.title | Co-deposition of gold nanoparticles and metalloporphyrin using the langmuir-blodgett (LB) technique for Surface-Enhanced Raman Scattering (SERS) | |
| dc.type | Otro | |
