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Front. Chem. | doi: 10.3389/fchem.2018.00028

Tracking of Short Distance Transport Pathways in Biological Tissues by Ultra-Small Nanoparticles

  • 1ETH Zurich, Switzerland

In this work, ultra-small europium-doped HfO2 nanoparticles were infiltrated into native wood and used as trackers for studying penetrability and diffusion pathways in the hierarchical wood structure. The high electron density, laser induced luminescence, and crystallinity of these particles allowed for a complementary detection of the particles in the cellular tissue. Confocal Raman microscopy and high-resolution synchrotron scanning wide-angle X-ray scattering (WAXS) measurements were used to detect the infiltrated particles in the native wood cell walls. This approach allows for simultaneously obtaining chemical information of the probed biological tissue and the spatial distribution of the integrated particles. The in-depth information about particle distribution in the complex wood structure can be used for revealing transport pathways in plant tissues, but also for gaining better understanding of modification treatments of plant scaffolds aiming at novel functionalized materials.

Keywords: Wood tissue, Transport pathways, Raman microscopic imaging, X-Ray Diffraction, Hafnia, nanophosphors

Received: 31 Oct 2017; Accepted: 05 Feb 2018.

Edited by:

Nicole J. Jaffrezic-Renault, Claude Bernard University Lyon 1, France

Reviewed by:

Wei-Lung Tseng, National Sun Yat-sen University, Taiwan
Benjamin S. Valdez, Universidad Autónoma de Baja California, Mexico  

Copyright: © 2018 Burgert, Segmehl, Lauria, Keplinger and Berg. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence:
Prof. Ingo Burgert, ETH Zurich, Zurich, Switzerland, iburgert@ethz.ch
Miss. Jana Segmehl, ETH Zurich, Zurich, Switzerland, jana@segmehl-energie.de