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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 timedependent diffusion coefficient which was compared with Brownian dynamics simulations of a viscoelastic model of harmonically bound spheres. Experimental timedependent two-dimensional trajectories of individual COEY NP revealed correlated twodimensional 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 OSA.

Registro:

Documento: Conferencia
Título:Rich stochastic dynamics of co-doped Er: Yb fluorescence upconversion nanoparticles in the presence of thermal, nonconservative, harmonic and optical forces
Autor:Nome, R.A.; Sorbello, C.; Jobbágy, M.; Barja, B.C.; Sanches, V.; Cruz, J.S.; Aguiar, V.F.; OSA
Filiación:Institute of Chemistry, University of Campinas, Campinas, SP, Brazil
DQIAQF, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, EHA-Buenos Aires, C1428, Argentina
INQUIMAE, CONICET, Argentina
Palabras clave:Stochastic dynamics; Upconversion nanoparticles; Diffusion; Dynamics; Erbium; Fluorescence; Light scattering; Nanoparticles; Scanning electron microscopy; Suspensions (fluids); Trajectories; Viscoelasticity; Ytterbium; Brownian dynamics simulations; Fluorescence upconversion; High-resolution scanning electron microscopies; Stochastic dynamics; Time-dependent diffusion coefficient; Two-dimensional trajectory; Upconversion nanoparticles; Zeta potential measurements; Stochastic systems
Año:2017
Volumen:Part F64-OTA 2017
DOI: http://dx.doi.org/10.1364/OTA.2017.OtW2E.2
Título revista:Optical Trapping Applications, OTA 2017
Título revista abreviado:Opt. InfoBase Conf. Pap
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97815575_vPartF64-OTA2017_n_p_Nome

Referencias:

  • Sorbello, C., Barja, B.C., Jobbagy, M., Monodispersed Ce(IV)-Gd(III)-Eu(III) oxide phosphors for enhanced red emission under visible excitation (2014) Journal of Materials Chemistry C, 2, pp. 1010-1017
  • Mason, T.G., Weitz, D.A., Optical Measurements of Frequency-dependent linear viscoelastic moduli of complex fluids (1995) Physical Review Letters, 74, pp. 1250-1253
  • Simulation of a Brownian particle in an optical trap (2013) American Journal of Physics, 81, p. 224A4 - OSA

Citas:

---------- APA ----------
Nome, R.A., Sorbello, C., Jobbágy, M., Barja, B.C., Sanches, V., Cruz, J.S., Aguiar, V.F.,..., OSA (2017) . Rich stochastic dynamics of co-doped Er: Yb fluorescence upconversion nanoparticles in the presence of thermal, nonconservative, harmonic and optical forces. Optical Trapping Applications, OTA 2017, Part F64-OTA 2017.
http://dx.doi.org/10.1364/OTA.2017.OtW2E.2
---------- CHICAGO ----------
Nome, R.A., Sorbello, C., Jobbágy, M., Barja, B.C., Sanches, V., Cruz, J.S., et al. "Rich stochastic dynamics of co-doped Er: Yb fluorescence upconversion nanoparticles in the presence of thermal, nonconservative, harmonic and optical forces" . Optical Trapping Applications, OTA 2017 Part F64-OTA 2017 (2017).
http://dx.doi.org/10.1364/OTA.2017.OtW2E.2
---------- MLA ----------
Nome, R.A., Sorbello, C., Jobbágy, M., Barja, B.C., Sanches, V., Cruz, J.S., et al. "Rich stochastic dynamics of co-doped Er: Yb fluorescence upconversion nanoparticles in the presence of thermal, nonconservative, harmonic and optical forces" . Optical Trapping Applications, OTA 2017, vol. Part F64-OTA 2017, 2017.
http://dx.doi.org/10.1364/OTA.2017.OtW2E.2
---------- VANCOUVER ----------
Nome, R.A., Sorbello, C., Jobbágy, M., Barja, B.C., Sanches, V., Cruz, J.S., et al. Rich stochastic dynamics of co-doped Er: Yb fluorescence upconversion nanoparticles in the presence of thermal, nonconservative, harmonic and optical forces. Opt. InfoBase Conf. Pap. 2017;Part F64-OTA 2017.
http://dx.doi.org/10.1364/OTA.2017.OtW2E.2