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Evaporation kinetics in highly porous tetrapodal zinc oxide networks studied using in situ SRµCT

DOI: 10.1038/s41598-021-99624-y DOI Help

Authors: Birte Hindenlang (Helmholtz Zentrum Hereon) , Anna Gapeeva (Kiel University) , Martina J. Baum (Kiel University) , Sören Kaps (Kiel University) , Lena M. Saure (Kiel University) , Florian Rasch (Kiel University) , Jorg Hammel (Helmholtz Zentrum Hereon) , Julian Moosmann (Helmholtz Zentrum Hereon) , Malte Storm (Diamond Light Source) , Rainer Adelung (Kiel University) , Fabian Schütt (Kiel University) , Berit Zeller-Plumhoff (Helmholtz Zentrum Hereon)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Scientific Reports , VOL 11

State: Published (Approved)
Published: October 2021
Diamond Proposal Number(s): 19205

Open Access Open Access

Abstract: Tetrapodal zinc oxide (t-ZnO) is used to fabricate polymer composites for many different applications ranging from biomedicine to electronics. In recent times, macroscopic framework structures from t-ZnO have been used as a versatile sacrificial template for the synthesis of multi-scaled foam structures from different nanomaterials such as graphene, hexagonal boron nitride or gallium nitride. Many of these fabrication methods rely on wet-chemical coating processes using nanomaterial dispersions, leading to a strong interest in the actual coating mechanism and factors influencing it. Depending on the type of medium (e.g. solvent) used, different results regarding the homogeneity of the nanomaterial coating can be achieved. In order to understand how a medium influences the coating behavior, the evaporation process of water and ethanol is investigated in this work using in situ synchrotron radiation-based micro computed tomography (SRµCT). By employing propagation-based phase contrast imaging, both the t-ZnO network and the medium can be visualized. Thus, the evaporation process can be monitored non-destructively in three dimensions. This investigation showed that using a polar medium such as water leads to uniform evaporation and, by that, a homogeneous coating of the entire network.

Journal Keywords: Ceramics; Imaging techniques; Materials science

Subject Areas: Materials

Instruments: I13-2-Diamond Manchester Imaging

Added On: 18/10/2021 10:13


Discipline Tags:

Ceramics Materials Science

Technical Tags:

Imaging Tomography