Publication detail

Single-Shot Aspect Ratio and Orientation Imaging of Nanoparticles

BOUCHAL, P. DVOŘÁK, P. HRTOŇ, M. ROVENSKÁ, K. CHMELÍK, R. ŠIKOLA, T. BOUCHAL, Z.

Original Title

Single-Shot Aspect Ratio and Orientation Imaging of Nanoparticles

Type

journal article in Web of Science

Language

English

Original Abstract

Plasmonic nanoparticleswith surface plasmon resonance (SPR) andscattering response dependent on their geometry and surrounding environmentare predestinated to be used as optical probes for sensing and imaging.Optical microscopy is capable of observing nanoparticles in variousmedia, but their geometry remains hidden below the diffraction limit.Here, a wide-field optical imaging technique is demonstrated, restoringthe aspect ratio and orientation of individual nanoparticles via thepolarization anisotropy (PA) measurement of the scattered light. ThePA is mapped into a single nanoparticle image, formed by decomposingthe scattered light into longitudinal and transverse SPR modes andmanipulating their angular momentum. The wide-field images providethe aspect ratio and orientation of many deposited nanoparticles allowingtheir assessment in heterogeneous suspensions or time-resolved measurements.In calibration experiments, orientation measurement accuracy and excellentsensitivity to nanoparticles with specific aspect ratios are demonstrated.Subsequently, the method is deployed in the automatic shape-dependentcategorization of hundreds of nanoparticles in a heterogeneous mixture.The single-shot capability is demonstrated in the time-resolved imagingof the electrophoretic deposition process.

Keywords

polarization anisotropy; light angular momentum; optical vortices; surface plasmon resonance; dark-fieldmicroscopy

Authors

BOUCHAL, P.; DVOŘÁK, P.; HRTOŇ, M.; ROVENSKÁ, K.; CHMELÍK, R.; ŠIKOLA, T.; BOUCHAL, Z.

Released

17. 8. 2023

Publisher

American Chemical Society

Location

WASHINGTON

ISBN

2330-4022

Periodical

ACS Photonics

Year of study

10

Number

9

State

United States of America

Pages from

3331

Pages to

3341

Pages count

11

URL

https://pubs.acs.org/doi/full/10.1021/acsphotonics.3c00785

Full text in the Digital Library

http://hdl.handle.net/11012/245044

BibTex

@article{BUT184511,
  author="Petr {Bouchal} and Petr {Viewegh} and Martin {Hrtoň} and Katarína {Rovenská} and Radim {Chmelík} and Tomáš {Šikola} and Zdeněk {Bouchal}",
  title="Single-Shot Aspect Ratio and Orientation Imaging of Nanoparticles",
  journal="ACS Photonics",
  year="2023",
  volume="10",
  number="9",
  pages="3331--3341",
  doi="10.1021/acsphotonics.3c00785",
  issn="2330-4022",
  url="https://pubs.acs.org/doi/full/10.1021/acsphotonics.3c00785"
}