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Golden nanoparticle in optical tweezers: influence of shape and orientation on optical trapping
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SYSNO ASEP 0460213 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Golden nanoparticle in optical tweezers: influence of shape and orientation on optical trapping Author(s) Šiler, Martin (UPT-D) RID, ORCID, SAI
Brzobohatý, Oto (UPT-D) RID, ORCID, SAI
Chvátal, Lukáš (UPT-D) RID, ORCID, SAI
Karásek, Vítězslav (UPT-D) RID, SAI
Paták, Aleš (UPT-D) RID, ORCID, SAI
Pokorná, Zuzana (UPT-D) RID, ORCID, SAI
Mika, Filip (UPT-D) RID, SAI, ORCID
Zemánek, Pavel (UPT-D) RID, SAI, ORCIDNumber of authors 8 Source Title Proceedings of the 15th International Seminar on Recent Trends in Charged Particle Optics and Surface Physics Instrumentation. - Brno : Institute of Scientific Instruments CAS, 2016 / Mika Filip - ISBN 978-80-87441-17-6 Pages s. 64-65 Number of pages 2 s. Publication form Print - P Action International Seminar on Recent Trends in Charged Particle Optics and Surface Physics Instrumentation /15./ Event date 29.05.2016 - 03.06.2016 VEvent location Skalský dvůr Country CZ - Czech Republic Event type WRD Language eng - English Country CZ - Czech Republic Keywords NPs ; plasmon resonance Subject RIV JA - Electronics ; Optoelectronics, Electrical Engineering R&D Projects GB14-36681G GA ČR - Czech Science Foundation (CSF) Institutional support UPT-D - RVO:68081731 UT WOS 000391254000029 Annotation Noble metal nanoparticles (NPs) have attracted increased attention in recent years due to various applications of resonant collective oscillations of free electrons excited with light (plasmon resonance). In contrast to bulk metal materials, where this plasmon resonance frequency depends only on the free electron number density, the optical response of gold and silver NPs can be tuned over the visible and near-infrared spectral region by the size and shape of the NP. Precise and remote placement and orientation of NPs inside cells or tissue would provide another degree of control for these applications. A single focused laser beam – optical tweezers – represents the most frequently used arrangement which provides threedimensional (3D) contact-less manipulation with dielectric objects or living cells ranging in size from tens of nanometers to tens of micrometers. It was believed that larger metal NPs behave as tiny mirrors that are pushed by the light beam radiative force along the direction of beam propagation, without a chance to be confined. However, recently several groups have reported successful optical trapping of gold and silver particles as large as 250 nm. We
offer an explanation based on the fact that metal nanoparticles naturally occur in various nonspherical
shapes, and their optical properties differ significantly due to changes in localized plasmon excitation.Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2017 Electronic address http://www.trends.isibrno.cz/
Number of the records: 1