Cellulose-inorganic hybrids of strongly reduced thermal conductivity
Spiliopoulos, P., Gestranius, M., Zhang, C., Ghiyasi, R., Tomko, J., Arstila, K., Putkonen, M., Hopkins, P. E., Karppinen, M., Tammelin, T., & Kontturi, E. (2022). Cellulose-inorganic hybrids of strongly reduced thermal conductivity. Cellulose, 29(15), 8151-8163. https://doi.org/10.1007/s10570-022-04768-3
DisciplineFysiikkaYdin- ja kiihdytinfysiikan huippuyksikköNanoscience CenterPhysicsCentre of Excellence in Nuclear and Accelerator Based PhysicsNanoscience Center
© 2022 Springer Nature B.V.
The employment of atomic layer deposition and spin coating techniques for preparing inorganic–organic hybrid multilayer structures of alternating ZnO-CNC layers was explored in this study. Helium ion microscopy and X-ray reflectivity showed the superlattice formation for the nanolaminate structures and atomic force microscopy established the efficient control of the CNCs surface coverage on the Al-doped ΖnO by manipulating the concentration of the spin coating solution. Thickness characterization of the hybrid structures was performed via both ellipsometry and X-ray reflectivity and the thermal conductivity was examined by time domain thermoreflectance technique. It appears that even the incorporation of a limited amount of CNCs between the ZnO laminates strongly suppresses the thermal conductivity. Even small, submonolayer amounts of CNCs worked as a more efficient insulating material than hydroquinone or cellulose nanofibers which have been employed in previous studies.
PublisherSpringer Science and Business Media LLC
ISSN Search the Publication Forum0969-0239
Publication in research information system
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Additional information about fundingOpen Access funding provided by Aalto University. PS and MG were funded by Academy of Finland (grants no. 300364 and 300367). MK and RG received funding from European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement (No. 765378), the Academy of Finland (Profi 3) and the use of RawMatters Finland Infrastructure (RAMI) at Aalto University. M.P received funding from the Academy of Finland by the profiling action on Matter and Materials, grant no. 318913. The work is a part of FinnCERES Materials Bioeconomy Ecosystem. PEH and JT received funding from the US Department of Defense, Multidisciplinary University Research Initiative through the Army Research Office, Grant no. W911NF-16-1-0406. ...
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