Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Plasmonics: From metallic foils to cancer treatment

12.01.2011
In a timely review paper, scientists from Japan, Germany, and Spain provide a highly relevant overview of the history, physical interpretation and applications of plasmons in metallic nanostructures.

The authors provide an extensive overview of the properties of plasmons in nanomaterials with emphasis on pioneering work of Ruthemann and Lang on electron energy loss spectroscopy (EELS) of electron motion in thin metal foils; recent infrared analysis of nanoscale metallic nanorods and nanoislands produced by ‘top-down’ photolithography; and the potential of metallic atomic wires for supporting plasmonic resonating modes. The review includes detailed explanations of plasmons for in vivo biosensing and nanoantennas.

A plasmon can be visualized as a collective oscillation of electronic ‘liquid’ in metals, similar to waves in lake, which are collective mode of the water molecules. Furthermore, surface plasmons are such oscillations confined to the surfaces of metals, which display a strong interaction with light, leading to the formation of so-called ‘polaritons’. Futuristic applications of plasmons include ideal lenses and even invisibility cloaks.

Research in the 1940s by Ruthemann and Lang on electrons flowing in thin metal foils using EELS yielded the first experimental sign of the presence of the theoretically predicted ‘plasma oscillations’ in metals. In 1957 Richie and colleagues predicted the existence of ‘surface localized’ plasmons, which was confirmed by Powell and Swan by EELS a few years later. In the 1960s researchers determined optical dispersion curves using optical spectroscopy, thereby opening up the possibility of optical applications of plasmon structures.

In this review, Nagao and colleagues offer insights into optical applications of localized surface plasmons in structures produced by photolithography. Specific examples include metallic nanoantenna detectors—where resonant excitation of light leads to ultrahigh electromagnetic field enhancement owing to plasmon polaritons localized at the surface of nanostructures; and optical interactions between arrays of nanorods for ‘surface enhanced Raman scattering’, which shows potential for in vivo biomolecular sensing. The authors also describe the fabrication of a prototype random-nanogap antenna for enhanced IR spectroscopy and in situ spectral monitoring of surface enhancement of infrared absorption during film growth.

Furthermore, the authors describe new trends in plasmonics research, in particular observation of plasmonic resonant modes in indium nanowires grown in ultrahigh vacuum on stepped silicon substrates. They predict that these nanowires will be used as building blocks for developing plasmonic devices of the future.

This review includes 86 references and 12 figures, providing an invaluable source of up-to-date information for newcomers and experts in this exciting field of research.

References and related websites

1. Tadaaki Nagao et al. Plasmons in nanoscale and atomic-scale system Science and Technology of Advanced Materials 11 (2010) No. 5, December. {http://iopscience.iop.org/1468-6996/11/5/054506}
Sci. Technol. Adv. Mater. Vol. 11 (2010) p. 054506
doi: 10.1088/1468-6996/11/5/054506
2. International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan

http://www.nims.go.jp/eng/research/mana/index.html

3. Kirchhoff Institute for Physics, University of Heidelberg, Im Neuenheimer Feld 227,
D 69120, Heidelberg, Germany
http://www.uni-heidelberg.de/index_e.html
4. Depto. de Física de Materiales, Facultad de Ciencias Quimicas, Universidad del Pais
Vasco, Apdo. 1072, 20080 San Sebastian/Donostia, Spain
http://www.ehu.es/p200-shenhm/en
5. Donostia International Physics Center (DIPC), Paseo de Manuel Lardizabal 4, 20018
San Sebastian/Donostia, Spain
http://dipc.ehu.es/
6. IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain
http://www.ikerbasque.net/
Media contacts:
National Institute for Materials Science, Tsukuba, Japan
Email: stam_office@nims.go.jp

Mikiko Tanifuji | Research asia research news
Further information:
http://www.nims.go.jp
http://www.researchsea.com

More articles from Materials Sciences:

nachricht New material could lead to erasable and rewriteable optical chips
07.12.2016 | University of Texas at Austin

nachricht Porous crystalline materials: TU Graz researcher shows method for controlled growth
07.12.2016 | Technische Universität Graz

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

NTU scientists build new ultrasound device using 3-D printing technology

07.12.2016 | Health and Medicine

The balancing act: An enzyme that links endocytosis to membrane recycling

07.12.2016 | Life Sciences

How to turn white fat brown

07.12.2016 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>