Optical sorting of gold nanoparticles based on the red-shift of plasmon resonance

Martin Ploschner; Tomáš Čižmar; Michael Mazilu; Andrea Di Falco; Kishan Dholakia

doi:10.1117/12.928482

Optical sorting of gold nanoparticles based on the red-shift of plasmon resonance

Martin Ploschner, Tomáš Čižmar, Michael Mazilu, Andrea Di Falco, Kishan Dholakia

Department of Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We present an experimental technique allowing size-based all-optical sorting of gold nanoparticles. The technique is based on the red-shift of plasmon resonance, due to retardation effects, with increasing particle size. As a result, smaller gold nanoparticles are influenced strongly by shorter wavelengths whereas larger gold nanoparticles are influenced more strongly by longer wavelengths. We utilise this retardation effect and realize sorting in a system of two counter-propagating evanescent waves, each at different wavelengths that selectively guide nanoparticles of different sizes in opposite directions. We validate this concept by demonstrating bidirectional sorting of gold nanoparticles of either 150 or 130 nm in diameter from those of 100 nm in diameter within a mixture.

Original language	English
Title of host publication	Optical Trapping and Optical Micromanipulation IX
DOIs	https://doi.org/10.1117/12.928482
Publication status	Published - 2012
Event	Optical Trapping and Optical Micromanipulation IX - San Diego, CA, United States Duration: 2012 Aug 12 → 2012 Aug 16

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	8458
ISSN (Print)	0277-786X

Conference

Conference	Optical Trapping and Optical Micromanipulation IX
Country/Territory	United States
City	San Diego, CA
Period	12/8/12 → 12/8/16

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.928482

Cite this

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title = "Optical sorting of gold nanoparticles based on the red-shift of plasmon resonance",

abstract = "We present an experimental technique allowing size-based all-optical sorting of gold nanoparticles. The technique is based on the red-shift of plasmon resonance, due to retardation effects, with increasing particle size. As a result, smaller gold nanoparticles are influenced strongly by shorter wavelengths whereas larger gold nanoparticles are influenced more strongly by longer wavelengths. We utilise this retardation effect and realize sorting in a system of two counter-propagating evanescent waves, each at different wavelengths that selectively guide nanoparticles of different sizes in opposite directions. We validate this concept by demonstrating bidirectional sorting of gold nanoparticles of either 150 or 130 nm in diameter from those of 100 nm in diameter within a mixture.",

author = "Martin Ploschner and Tom{\'a}{\v s} {\v C}i{\v z}mar and Michael Mazilu and {Di Falco}, Andrea and Kishan Dholakia",

year = "2012",

doi = "10.1117/12.928482",

language = "English",

isbn = "9780819491756",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

booktitle = "Optical Trapping and Optical Micromanipulation IX",

note = "Optical Trapping and Optical Micromanipulation IX ; Conference date: 12-08-2012 Through 16-08-2012",

}

Ploschner, M, Čižmar, T, Mazilu, M, Di Falco, A & Dholakia, K 2012, Optical sorting of gold nanoparticles based on the red-shift of plasmon resonance. in Optical Trapping and Optical Micromanipulation IX., 84581L, Proceedings of SPIE - The International Society for Optical Engineering, vol. 8458, Optical Trapping and Optical Micromanipulation IX, San Diego, CA, United States, 12/8/12. https://doi.org/10.1117/12.928482

Optical sorting of gold nanoparticles based on the red-shift of plasmon resonance. / Ploschner, Martin; Čižmar, Tomáš; Mazilu, Michael et al.

Optical Trapping and Optical Micromanipulation IX. 2012. 84581L (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8458).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Optical sorting of gold nanoparticles based on the red-shift of plasmon resonance

AU - Ploschner, Martin

AU - Čižmar, Tomáš

AU - Mazilu, Michael

AU - Di Falco, Andrea

AU - Dholakia, Kishan

PY - 2012

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N2 - We present an experimental technique allowing size-based all-optical sorting of gold nanoparticles. The technique is based on the red-shift of plasmon resonance, due to retardation effects, with increasing particle size. As a result, smaller gold nanoparticles are influenced strongly by shorter wavelengths whereas larger gold nanoparticles are influenced more strongly by longer wavelengths. We utilise this retardation effect and realize sorting in a system of two counter-propagating evanescent waves, each at different wavelengths that selectively guide nanoparticles of different sizes in opposite directions. We validate this concept by demonstrating bidirectional sorting of gold nanoparticles of either 150 or 130 nm in diameter from those of 100 nm in diameter within a mixture.

AB - We present an experimental technique allowing size-based all-optical sorting of gold nanoparticles. The technique is based on the red-shift of plasmon resonance, due to retardation effects, with increasing particle size. As a result, smaller gold nanoparticles are influenced strongly by shorter wavelengths whereas larger gold nanoparticles are influenced more strongly by longer wavelengths. We utilise this retardation effect and realize sorting in a system of two counter-propagating evanescent waves, each at different wavelengths that selectively guide nanoparticles of different sizes in opposite directions. We validate this concept by demonstrating bidirectional sorting of gold nanoparticles of either 150 or 130 nm in diameter from those of 100 nm in diameter within a mixture.

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M3 - Conference contribution

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T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Optical Trapping and Optical Micromanipulation IX

T2 - Optical Trapping and Optical Micromanipulation IX

Y2 - 12 August 2012 through 16 August 2012

ER -

Optical sorting of gold nanoparticles based on the red-shift of plasmon resonance

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