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Díaz-Núñez P, García-Martín JM, González MU, González-Arrabal R, Rivera A, Alonso-González P, Martín-Sánchez J, Taboada-Gutiérrez J, González-Rubio G, Guerrero-Martínez A, Bañares L, Peña-Rodríguez O. On the Large Near-Field Enhancement on Nanocolumnar Gold Substrates. Sci Rep 2019; 9:13933. [PMID: 31558753 PMCID: PMC6763449 DOI: 10.1038/s41598-019-50392-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 07/31/2019] [Indexed: 11/08/2022] Open
Abstract
One of the most important and distinctive features of plasmonic nanostructures is their ability to confine large electromagnetic fields on nanometric volumes; i.e., the so-called hot spots. The generation, control and characterization of the hot spots are fundamental for several applications, like surface-enhanced spectroscopies. In this work, we characterize the near-field distribution and enhancement of nanostructured gold thin films fabricated by glancing angle deposition magnetron sputtering. These films are composed of columnar nanostructures with high roughness and high density of inter-columnar gaps, where the electromagnetic radiation can be confined, generating hot spots. As expected, the hot spots are localized in the gaps between adjacent nanocolumns and we use scattering-type scanning near-field optical microscopy to image their distribution over the surface of the samples. The experimental results are compared with finite-difference time-domain simulations, finding an excellent agreement between them. The spectral dependence of the field-enhancement is also studied with the simulations, together with surface-enhanced Raman spectroscopy at different excitation wavelengths in the visible-NIR range, proving a broad-band response of the substrates. These findings may result in interesting applications in the field of surface-enhanced optical spectroscopies or sensing.
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Affiliation(s)
- Pablo Díaz-Núñez
- Instituto de Fusión Nuclear "Guillermo Velarde", Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, E-28006, Madrid, Spain.
| | - José Miguel García-Martín
- Instituto de Micro y Nanotecnología, IMN-CNM, CSIC (CEI UAM+CSIC), Isaac Newton 8, 28760, Tres Cantos, Spain
| | - María Ujué González
- Instituto de Micro y Nanotecnología, IMN-CNM, CSIC (CEI UAM+CSIC), Isaac Newton 8, 28760, Tres Cantos, Spain
| | - Raquel González-Arrabal
- Instituto de Fusión Nuclear "Guillermo Velarde", Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, E-28006, Madrid, Spain
- Departamento de Ingeniería Energética, Escuela Técnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, E-28006, Madrid, Spain
| | - Antonio Rivera
- Instituto de Fusión Nuclear "Guillermo Velarde", Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, E-28006, Madrid, Spain
- Departamento de Ingeniería Energética, Escuela Técnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, E-28006, Madrid, Spain
| | - Pablo Alonso-González
- Departamento de Física, Universidad de Oviedo, E-33007, Oviedo, Spain
- Center of Research on Nanomaterials and Nanotechnology, CINN (CSIC-Universidad de Oviedo), El Entrego, 33940, Spain
| | - Javier Martín-Sánchez
- Departamento de Física, Universidad de Oviedo, E-33007, Oviedo, Spain
- Center of Research on Nanomaterials and Nanotechnology, CINN (CSIC-Universidad de Oviedo), El Entrego, 33940, Spain
| | - Javier Taboada-Gutiérrez
- Departamento de Física, Universidad de Oviedo, E-33007, Oviedo, Spain
- Center of Research on Nanomaterials and Nanotechnology, CINN (CSIC-Universidad de Oviedo), El Entrego, 33940, Spain
| | - Guillermo González-Rubio
- Departamento de Química Física, Universidad Complutense de Madrid, Avenida Complutense s/n, E-28040, Madrid, Spain
- Bionanoplasmonics Laboratory, CIC biomaGUNE, Paseo de Miramón 182, 20014, Donostia, San Sebastián, Spain
| | - Andrés Guerrero-Martínez
- Departamento de Química Física, Universidad Complutense de Madrid, Avenida Complutense s/n, E-28040, Madrid, Spain
| | - Luis Bañares
- Departamento de Química Física, Universidad Complutense de Madrid, Avenida Complutense s/n, E-28040, Madrid, Spain
- Centro de Láseres Ultrarrápidos, Universidad Complutense de Madrid, Avenida Complutense s/n, E-28040, Madrid, Spain
| | - Ovidio Peña-Rodríguez
- Instituto de Fusión Nuclear "Guillermo Velarde", Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, E-28006, Madrid, Spain
- Departamento de Ingeniería Energética, Escuela Técnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, E-28006, Madrid, Spain
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Roth SV, Santoro G, Risch JFH, Yu S, Schwartzkopf M, Boese T, Döhrmann R, Zhang P, Besner B, Bremer P, Rukser D, Rübhausen MA, Terrill NJ, Staniec PA, Yao Y, Metwalli E, Müller-Buschbaum P. Patterned Diblock Co-Polymer Thin Films as Templates for Advanced Anisotropic Metal Nanostructures. ACS APPLIED MATERIALS & INTERFACES 2015; 7:12470-7. [PMID: 25635697 DOI: 10.1021/am507727f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
We demonstrate glancing-angle deposition of gold on a nanostructured diblock copolymer, namely polystyrene-block-poly(methyl methacrylate) thin film. Exploiting the selective wetting of gold on the polystyrene block, we are able to fabricate directional hierarchical structures. We prove the asymmetric growth of the gold nanoparticles and are able to extract the different growth laws by in situ scattering methods. The optical anisotropy of these hierarchical hybrid materials is further probed by angular resolved spectroscopic methods. This approach enables us to tailor functional hierarchical layers in nanodevices, such as nanoantennae arrays, organic photovoltaics, and sensor electronics.
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Affiliation(s)
- Stephan V Roth
- †Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - Gonzalo Santoro
- †Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - Johannes F H Risch
- †Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - Shun Yu
- †Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | | | - Torsten Boese
- †Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - Ralph Döhrmann
- †Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - Peng Zhang
- †Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany
| | - Bastian Besner
- ‡Institut für Nanostruktur- und Festkörperforschung, Center for Free-Electron Laser Science, Advanced Study Group-APOG, University of Hamburg, Luruper Chaussee 149, 22761 D Hamburg, Germany
| | - Philipp Bremer
- ‡Institut für Nanostruktur- und Festkörperforschung, Center for Free-Electron Laser Science, Advanced Study Group-APOG, University of Hamburg, Luruper Chaussee 149, 22761 D Hamburg, Germany
| | - Dieter Rukser
- ‡Institut für Nanostruktur- und Festkörperforschung, Center for Free-Electron Laser Science, Advanced Study Group-APOG, University of Hamburg, Luruper Chaussee 149, 22761 D Hamburg, Germany
| | - Michael A Rübhausen
- ‡Institut für Nanostruktur- und Festkörperforschung, Center for Free-Electron Laser Science, Advanced Study Group-APOG, University of Hamburg, Luruper Chaussee 149, 22761 D Hamburg, Germany
| | - Nick J Terrill
- §Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0QX, United Kingdom
| | - Paul A Staniec
- §Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0QX, United Kingdom
| | - Yuan Yao
- ⊥Lehrstuhl für Funktionelle Materialien, TU München, James-Franck-Strasse 1, D-85748 Garching, Germany
| | - Ezzeldin Metwalli
- ⊥Lehrstuhl für Funktionelle Materialien, TU München, James-Franck-Strasse 1, D-85748 Garching, Germany
| | - Peter Müller-Buschbaum
- ⊥Lehrstuhl für Funktionelle Materialien, TU München, James-Franck-Strasse 1, D-85748 Garching, Germany
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