Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Rich stochastic dynamics of co-doped Er:Yb fluorescence upconversion nanoparticles in the presence of thermal, non-conservative, harmonic and optical forces

Not Accessible

Your library or personal account may give you access

Abstract

Stochastic dynamics of individual co-doped Er:Yb upconversion nanoparticles (COEY NPs) were investigated from experiments and simulations. The COEY NPs were characterized by high-resolution scanning electron microscopy, dynamic light scattering, and zeta potential measurements. Single COEY NP measurements were performed by fluorescence upconversion micro-spectroscopy and optical trapping. The home-built apparatus was initially calibrated by performing individual trajectory measurements to determine diffusion coefficients in solution from displacement histograms, mean-squared displacement (MSD), and power spectra. MSDs from single COEY NP exhibited time-dependent diffusion coefficient which was compared with Brownian dynamics simulations of a viscoelastic model of harmonically bound spheres. Experimental time-dependent two-dimensional trajectories of individual COEY NP revealed correlated two-dimensional nanoparticle motion. The measurements were compared with stochastic trajectories calculated in the presence of a non-conservative rotational force field. Overall, the complex interplay of COEY NP adhesion, thermal fluctuations and optical forces led to a rich stochastic behavior of these nanoparticles.

© 2017 Optical Society of America

PDF Article
More Like This
“On the fly” evaluation of upconversion nanoparticle power dependence from individual stochastic trajectories

Isabela N. Cavalcante, M. Claudia Marchi, Fernando A. Sigoli, Paulo C. de Sousa Filho, Beatriz C. Barja, and René A. Nome
AW3D.4 Optical Manipulation and Its Applications (OMA) 2021

Upconversion NaSc/YF4:Yb:Er nanoparticles co-doped with Gd3+ and Nd3+ for thermometry on nanoscale

Dennis T. Klier, Selma Nacak, and Michael U. Kumke
OM4D.4 Optical Molecular Probes, Imaging and Drug Delivery (OMP) 2015

Non-conservative forces in optical tweezers

David G. Grier
STuC4 Frontiers in Optics (FiO) 2010

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved