Exploring Single-Nanoparticle Dynamics at High Temperature by Optical Tweezers
- 11 November 2020
- journal article
- research article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 20 (11), 8024-8031
- https://doi.org/10.1021/acs.nanolett.0c02936
Abstract
The experimental determination of the velocity of a colloidal nanoparticle (v(Np)) has recently became a hot topic. The thermal dependence of v(Np) is still left to be explored although it is a valuable source of information allowing, for instance, the discernment between ballistic and diffusive regimes. Optical tweezers (OTs) constitute a tool especially useful for the experimental determination of v m , although they have only been capable of determining it at room temperature. In this work, we demonstrate that it is possible to determine the temperature dependence of the diffusive velocity of a single colloidal nanoparticle by analyzing the temperature dependence of optical forces. The comparison between experimental results and theoretical predictions allowed us to discover the impact that the anomalous temperature dependence of water properties has on the dynamics of colloidal nanoparticles in this temperature range.Keywords
Funding Information
- Comunidad de Madrid (SI1/PJI/2019-00052)
- Ministerio de Ciencia e Innovaci?n (PID2019-105195RA-I00, PID2019-106211RB-I00)
- European Regional Development Fund
- Ministerio de Econom?a y Competitividad (MAT2016-75362-C3-1-R)
- Narodowe Centrum Nauki (2018/30/E/ST5/00718)
- Carl Tryggers Stiftelse f?r Vetenskaplig Forskning (CTS18:229)
- Universidad Aut?noma de Madrid
- China Scholarship Council (201808350097)
- Funda??o para a Ci?ncia e a Tecnologia (UIDB/50011/2020, UIDP/50011/2020)
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