Journal
NANO LETTERS
Volume 16, Issue 12, Pages 8005-8014Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.6b04583
Keywords
Optical trapping; upconverting particle; optical torque; finite element method; viscosity; microrheometry
Categories
Funding
- Spanish Ministerio de Educacion y Ciencia [MAT2013-47395-C4-1-R, MAT2016-75362-C3-1-R]
- Banco Santander [2015/ASIA/06]
- COST Action [1403]
Ask authors/readers for more resources
Precise knowledge and control over the orientation of individual upconverting particles is extremely important for full exploiting their capabilities as multifunctional bioprobes for interdisciplinary applications. In this work, we report on how time-resolved, single particle polarized spectroscopy can be used to determine the orientation dynamics of a single upconverting particle when entering into an optical trap. Experimental results have unequivocally evidenced the existence of a unique stable configuration. Numerical simulations and simple numerical calculations have demonstrated that the dipole magnetic interactions between the upconverting particle and trapping radiation are the main mechanisms responsible of the optical torques that drive the upconverting particle to its stable orientation. Finally, how a proper analysis of the rotation dynamics of a single upconverting particle within an optical trap can provide valuable information about the properties of the medium in which it is suspended is demonstrated. A proof of concept is given in which the laser driven intracellular rotation of upconverting particles is used to successfully determine the intracellular dynamic viscosity by a passive and an active method.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available