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Applied Sciences
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Laser Interaction with Plasmonic Nanostructures
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Laser Interaction with Plasmonic Nanostructures

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Optics and Lasers".

Deadline for manuscript submissions: closed (30 June 2018) | Viewed by 26464

Special Issue Editors

Dr. Andrés Guerrero-Martínez

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Guest Editor
Departamento de Química Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
Interests: nanoplasmonics; colloid chemistry; supramolecular chemistry; spectroscopy
Special Issues, Collections and Topics in MDPI journals
Dr. Ovidio Peña-Rodríguez

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Guest Editor
Instituto de Fusión Nuclear, Universidad Politécnica de Madrid, E-28006 Madrid, Spain

Special Issue Information

Dear Colleagues,

Plasmonics is the branch of science that deals with the interaction between the electromagnetic field and the free electrons in a metal, as well as their potential applications. In nanostructured metals this interaction produces the localized surface plasmon resonances (LSPR), which can be defined as the collective oscillation of conduction electrons in resonance with the incoming light. The LSPR can be tuned by changing parameters, such as the size, shape, and composition of the nanoparticles, but also the nature of the excitation source. For instance, under laser irradiation, the nanostructures act as nanolenses, inducing electromagnetic field enhancements in their surroundings that are several orders of magnitude larger than that of the incident field. We focus this Special Issue on the effects of this interaction that open new perspectives for designing novel devices and applications in a wide variety of fields. For instance, the combination of a continuous wave laser with plasmonic nanoparticles, as enhancement platforms, can be used either for efficient photothermal destruction of cancer cells, avoiding damage to tissues, or to perform surface enhanced Raman scattering (SERS) spectroscopies, a powerful analytic tool capable of single molecule detection. Likewise, pulsed lasers have been used to study the mechanisms of surface plasmon dynamics in metal nanoparticles but also to synthesize (laser ablation) or modify them. All the topics related to the interaction of lasers with plasmonic nanostructures, including, but not restricted to, the previous examples, are invited to this Special Issue.

Dr. Andrés Guerrero-Martínez
Dr. Ovidio Peña-Rodríguez
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Plasmonics

  • metal nanostructures

  • continuous wave laser

  • pulse laser

  • SERS

  • laser ablation

  • plasmonic photothermal therapy

Published Papers (5 papers)

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Research

4083 KiB  
Article
Plasmon Modulation Spectroscopy of Noble Metals to Reveal the Distribution of the Fermi Surface Electrons in the Conduction Band
by Kentaro Takagi, Selvakumar V. Nair, Jumpei Saito, Keisuke Seto, Ryosuke Watanabe, Takayoshi Kobayashi and Eiji Tokunaga
Appl. Sci. 2017, 7(12), 1315; https://0-doi-org.brum.beds.ac.uk/10.3390/app7121315 - 18 Dec 2017
Cited by 5 | Viewed by 5087
Abstract
To directly access the dynamics of electron distribution near the Fermi-surface after plasmon excitation, pump-probe spectroscopy was performed by pumping plasmons on noble-metal films and probing the interband transition. Spectral change in the interband transitions is sensitive to the electron distribution near the [...] Read more.
To directly access the dynamics of electron distribution near the Fermi-surface after plasmon excitation, pump-probe spectroscopy was performed by pumping plasmons on noble-metal films and probing the interband transition. Spectral change in the interband transitions is sensitive to the electron distribution near the Fermi-surface, because it involves the d valence-band to the conduction band transitions and should reflect the k-space distribution dynamics of electrons. For the continuous-wave pump and probe experiment, the plasmon modulation spectra are found to differ from both the current modulation and temperature difference spectra, possibly reflecting signatures of the plasmon wave function. For the femtosecond-pulse pump and probe experiment, the transient spectra agree well with the known spectra upon the excitation of the respective electrons resulting from plasmon relaxation, probably because the lifetime of plasmons is shorter than the pulse duration. Full article
(This article belongs to the Special Issue Laser Interaction with Plasmonic Nanostructures)
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4234 KiB  
Article
Pt-Based Nanostructures for Observing Genuine SERS Spectra of p-Aminothiophenol (PATP) Molecules
by Yinong Wang, Haofei Zhao, En Cao, Yinghui Sun, Huanyu Ye, Weihua Lin and Rongming Wang
Appl. Sci. 2017, 7(9), 953; https://0-doi-org.brum.beds.ac.uk/10.3390/app7090953 - 15 Sep 2017
Cited by 6 | Viewed by 4210
Abstract
By one-pot wet chemical method, Pt-based hollow nanostructures were synthesized at room temperature. Because of the highly damping optical response of the metal, these Pt-based hollow nanostructures exhibited weak thermal effects with a laser focal spot on 4-aminothiophenol (PATP) molecules limiting dimerisation. The [...] Read more.
By one-pot wet chemical method, Pt-based hollow nanostructures were synthesized at room temperature. Because of the highly damping optical response of the metal, these Pt-based hollow nanostructures exhibited weak thermal effects with a laser focal spot on 4-aminothiophenol (PATP) molecules limiting dimerisation. The isolated surface enhanced Raman scattering (SERS) spectra of PATP, in which the vibrational bands from 4,4′-dimercaptoazobenzene (DMAB) molecules are not observed, were able to be seen, and this was in good agreement with the Raman spectra of PATP powder. In addition, the concentration of PATP molecules was varied, and the illumination time was increased to 2000 s, respectively. It was found that spectra were stable with varied PATP concentrations, and the plasmon-driven chemical conversion of PATP to DMAB was still suppressed, even when the laser illumination time was increased to 2000 s. Full article
(This article belongs to the Special Issue Laser Interaction with Plasmonic Nanostructures)
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1646 KiB  
Article
Ion-Mediated Aggregation of Gold Nanoparticles for Light-Induced Heating
by David Alba-Molina, María T. Martín-Romero, Luis Camacho and Juan J. Giner-Casares
Appl. Sci. 2017, 7(9), 916; https://0-doi-org.brum.beds.ac.uk/10.3390/app7090916 - 07 Sep 2017
Cited by 16 | Viewed by 7254
Abstract
Photothermal therapy is proposed as a straightforward manner of killing cancer cells, which a plasmon field of gold nanoparticles is activated by incoming light resonance leading to a local increase of temperature. This photothermal effect is strongly dependent on the plasmonic features of [...] Read more.
Photothermal therapy is proposed as a straightforward manner of killing cancer cells, which a plasmon field of gold nanoparticles is activated by incoming light resonance leading to a local increase of temperature. This photothermal effect is strongly dependent on the plasmonic features of the nanoparticles. Herein, we study the effect of the ion-mediated aggregation of citrate-capped small spherical gold nanoparticles on the plasmonic band and the photothermal performance. An intermediate value of ionic strength has been found to be optimum with respect to the photothermal capabilities of the gold nanoparticles. Full article
(This article belongs to the Special Issue Laser Interaction with Plasmonic Nanostructures)
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706 KiB  
Article
Size Characterisation Method and Detection Enhancement of Plasmonic Nanoparticles in a Pump–Probe System
by Rafael Fuentes-Domínguez, Richard J. Smith, Fernando Pérez-Cota, Leonel Marques, Ovidio Peña-Rodríguez and Matt Clark
Appl. Sci. 2017, 7(8), 819; https://0-doi-org.brum.beds.ac.uk/10.3390/app7080819 - 10 Aug 2017
Cited by 4 | Viewed by 3871
Abstract
The optical resonance of metal nanoparticles can be used to enhance the generation and detection of their main vibrational mode. In this work, we show that this method allows the accurate characterisation of the particle’s size because the vibrational frequency of plasmonic nanoparticles [...] Read more.
The optical resonance of metal nanoparticles can be used to enhance the generation and detection of their main vibrational mode. In this work, we show that this method allows the accurate characterisation of the particle’s size because the vibrational frequency of plasmonic nanoparticles only depends on their mechanical properties. Moreover, by a careful selection of the particle size and/or probe laser wavelength, the detected signal can be increased by a large factor (∼9 for the particles used in this work) under the same illumination conditions. Finally, we show experimentally that particles of different sizes inside the point spread function can be observed due to the differences in their vibrational states, which could provide a feasible route to super-resolution. Full article
(This article belongs to the Special Issue Laser Interaction with Plasmonic Nanostructures)
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1911 KiB  
Article
Effect of Organic Stabilizers on Silver Nanoparticles Fabricated by Femtosecond Pulsed Laser Ablation
by Pablo Díaz-Núñez, Jesús González-Izquierdo, Guillermo González-Rubio, Andrés Guerrero-Martínez, Antonio Rivera, José Manuel Perlado, Luis Bañares and Ovidio Peña-Rodríguez
Appl. Sci. 2017, 7(8), 793; https://0-doi-org.brum.beds.ac.uk/10.3390/app7080793 - 04 Aug 2017
Cited by 10 | Viewed by 5266
Abstract
Laser ablation has several advantages over the chemical synthesis of nanoparticles due to its simplicity and because it is a faster and cleaner process. In this paper, we use femtosecond laser ablation to generate highly concentrated silver colloidal nanoparticle solutions. Those high concentrations [...] Read more.
Laser ablation has several advantages over the chemical synthesis of nanoparticles due to its simplicity and because it is a faster and cleaner process. In this paper, we use femtosecond laser ablation to generate highly concentrated silver colloidal nanoparticle solutions. Those high concentrations usually lead to agglomeration of the nanoparticles, rendering the solution nearly useless. We employ two different organic stabilizers (hexadecyltrimethylammonium bromide, CTAB, and polyvinylpyrrolidone, PVP) to avoid this problem and study their effect on the nanoparticle size distribution, structural characteristics, and the solution concentration. Full article
(This article belongs to the Special Issue Laser Interaction with Plasmonic Nanostructures)
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