10.5281/zenodo.3597416
https://zenodo.org/records/3597416
oai:zenodo.org:3597416
Bastos, Ana R. N.
Ana R. N.
Bastos
Department of Physics, CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193, Aveiro, Portugal
Brites, Carlos D. S.
Carlos D. S.
Brites
Department of Physics, CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193, Aveiro, Portugal
Rojas-Gutierrez, Paola A.
Paola A.
Rojas-Gutierrez
Department of Chemistry and Biochemistry, and Centre for NanoScience Research, Concordia University, 7141 Sherbrooke St. West, Montreal, Quebec, H4B 1R6, Canada
DeWolf, Christine
Christine
DeWolf
Department of Chemistry and Biochemistry, and Centre for NanoScience Research, Concordia University, 7141 Sherbrooke St. West, Montreal, Quebec, H4B 1R6, Canada
Ferreira, Rute A. S.
Rute A. S.
Ferreira
Department of Physics, CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193, Aveiro, Portugal
Capobianco, John A.
John A.
Capobianco
Department of Chemistry and Biochemistry, and Centre for NanoScience Research, Concordia University, 7141 Sherbrooke St. West, Montreal, Quebec, H4B 1R6, Canada
Carlos, Luís D.
Luís D.
Carlos
Department of Physics, CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193, Aveiro, Portugal
Thermal properties of lipid bilayers determined using upconversion nanothermometry
Zenodo
2019
luminescence
nanothermometry
upconversion nanoparticle
thermal conductivity
lipid bilayer
2019-09-09
eng
10.5281/zenodo.3597415
https://zenodo.org/communities/eu
Creative Commons Attribution 4.0 International
Luminescent nanomaterials have shown promise for thermal sensing in bio-applications, yet little is known of the role of organic coatings such as supported lipid bilayers on the thermal conductivity between the nanomaterial and its environment. Additionally, since the supported lipid bilayer mimics the cell membrane, its thermal properties are fundamentally important to understand the spatial variations of temperature and heat transfer across membranes. Herein we describe a new approach that enables direct measurement of these thermal properties using a LiYF4: Er3+ / Yb3+ upconverting nanoparticle encapsulated within a conformal supported lipid bilayer and dispersed in water as a temperature probe yielding the temperature gradient across the bilayer. The thermal conductivity of lipid bilayer was measured as a function of the temperature, being 0.20±0.02 W·m‒1·K‒1 at 300 K. For the uncapped nanoparticles dispersed in water, the temperature dependence of the thermal conductivity was also measured in the 300‒314 K range as [0.63‒0.69]±0.11 W·m‒1·K‒1. Using a lumped elements model, we calculate the directional heat transfer at each of the system interfaces, namely nanoparticle-bilayer and bilayer-nanofluid, opening a new avenue to understand the membrane biophysical properties as well as the thermal properties of organic and polymer coatings.
This project has received funding from the European Union's Horizon 2020 FET Open programme under grant agreement No 801305 (NanoTBTech).
European Commission
10.13039/501100000780
801305
Nanoparticles-based 2D thermal bioimaging technologies