دورية أكاديمية
Understanding the behavior of new plasmonic probes with sub-nanometric resolution in field enhanced scanning optical microscopy
| العنوان: | Understanding the behavior of new plasmonic probes with sub-nanometric resolution in field enhanced scanning optical microscopy |
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| المؤلفون: | Perassi, Eduardo Marcelo, Scarpettini, Alberto Franco, Masip, Martin Eduardo, Bragas, Andrea Veronica, Coronado, Eduardo A. |
| بيانات النشر: | American Chemical Society |
| المجموعة: | CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
| مصطلحات موضوعية: | Plasmonic, Fesom, Microspher, Nanoparticle, https://purl.org/becyt/ford/2.10Test, https://purl.org/becyt/ford/2Test |
| الوصف: | Recently, using field enhanced scanning optical microscopy (FESOM), a new kind of plasmonic nanostructured probes has been introduced capable to achieve subnanometric vertical resolution on atomically flat samples. These plasmonic probes consisting in silica (SiO2) microspheres decorated with 5 nm diameter spherical Ag nanoparticles (NPs) exhibit a multiple peaked experimental extinction spectra in colloidal dispersion. The subnanometric resolution achieved in FESOM is observed when they are attached to a metal tip and illuminated at 632 nm. On the contrary, these probes lack of resolution in FESOM measurements upon 532 nm laser light illumination. In this work, the complex extinction properties of these probes as well as their near field optical properties are compared and analyzed by means of rigorous electrodynamic simulations. The calculations show that the far and near field optical behavior can only be explained in a consistent way in terms of the plasmonic response of small Ag NPs clusters on the silica surface. Using these cluster configurations, the near field simulations of the optical response are also found to be in excellent agreement with the experimental FESOM approach curves, demonstrating in this way the subnanometric resolution achieved at 632 nm and the almost null response at 532 nm. © 2011 American Chemical Society. ; Fil: Perassi, Eduardo Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina ; Fil: Scarpettini, Alberto Franco. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina ; Fil: Masip, Martin ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1932-7447 |
| العلاقة: | http://hdl.handle.net/11336/74081Test; Perassi, Eduardo Marcelo; Scarpettini, Alberto Franco; Masip, Martin Eduardo; Bragas, Andrea Veronica; Coronado, Eduardo A.; Understanding the behavior of new plasmonic probes with sub-nanometric resolution in field enhanced scanning optical microscopy; American Chemical Society; Journal of Physical Chemistry C; 115; 21; 5-2011; 10455-10461; CONICET Digital; CONICET |
| الإتاحة: | https://doi.org/10.1021/jp201717fTest http://hdl.handle.net/11336/74081Test |
| حقوق: | info:eu-repo/semantics/openAccess ; https://creativecommons.org/licenses/by-nc-sa/2.5/arTest/ |
| رقم الانضمام: | edsbas.497003F5 |
| قاعدة البيانات: | BASE |
| تدمد: | 19327447 |
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