SKM 2021 – wissenschaftliches Programm
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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 11: Organic Electronics and Photovoltaics, Electrical and Optical Properties (joint session CPP/KFM)
KFM 11.6: Vortrag
Donnerstag, 30. September 2021, 15:15–15:30, H3
Cellulose-silver nanoparticle composites for optical applications — Calvin J. Brett1,2, Björn Fricke1, Alexandros E. Alexakis2, Tim Laarmann1,3, Volker Körstgens4, Peter Müller-Buschbaum4,5, Daniel Söderberg2, and •Stephan V. Roth1,2 — 1Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany — 2KTH Royal Institute of Technology, 100 44 Stockholm, Sweden — 3The Hamburg Centre for Ultrafast Imaging CUI, 22761 Hamburg, Germany — 4Lehrstuhl f. Funktionelle Materialien, Physik-Department, Technische Universität Muenchen, 85748 Garching, Germany — 5Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität Muenchen, 85748 Garching, Germany
Cellulose nanofibrils (CNF) provide biocompatibility and are emerging candidates for functional composites and for templating organic optoelectronics. Here we present a facile fabrication of biocompatible hybrid thin films with tunable optical responses by establishing a thin film composite of silver nitrate precursor and CNF films. Subsequent thermal annealing induces the transformation of the silver nitrate into metallic silver nanoparticles and their CNF-template assisted growth. Correlating nanoparticle morphology and optical spectroscopy, our results show the ability to tailor the electronic band gap of the silver nanoparticles and thus of the hybrid material by adjusting the time scale of the thermal transformation.
[1] Brett et al., ACS Appl. Mater. Interfaces 13, 27696 (2021)