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Large scale manufacturing route to metamaterial coatings using thermal spray techniques and their response to solar radiation. [Dataset]


Federico Venturi
Data Collector

Tanvir Hussain
Data Collector

Tapas Mallick
Data Collector

Firdaus Muhammad-Sukki
Data Collector

Alex Bishop
Data Collector

Hari Upadhyaya
Data Collector

Nirmal Kumar Katiyar
Data Collector

Saurav Goel
Data Collector


Metamaterials, an artificial periodic two- or three-dimensional configuration can change propagation characteristics of electromagnetic waves (i.e., reflection, transmission, absorption). The current challenges in the field of metamaterial coatings are their manufacturing in large scale and large length scale. There is a clear need to enhance process technologies and scalability of these. Thermal spraying is a method used to deposit small to large scale coatings where the sprayed layer is typically formed by successive impact of fully or partially molten particles of a material exposed to various process conditions. This work aims to investigate the feasibility to manufacture large scale metamaterial coatings using the thermal spray technique and examine their response to solar radiation. Two types of coatings namely, Cr2O3 and TiO2 were deposited onto various substrates (e.g., steel, aluminium, glass, indium tin oxide (ITO) coated glass) with a fine wire mesh (143 µm and 1 mm aperture sizes) as the masking sheet to manipulate the surface pattern using suspension high-velocity oxy-fuel thermal spraying (S-HVOF) and atmospheric plasma-sprayed (APS) methods, respectively. Post deposition, their responses subjected to electromagnetic wave (between 250 nm to 2500 nm or Ultraviolet (UV)-Visible (Vis)-Infrared (IR) region) were characterised. The additional microstructural characterisation was performed using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), three-dimensional profilometry and optical spectroscopy. It is demonstrated that through novel application of thermal spray techniques, large scale manufacturing of metamaterial coating is possible, and such material can affect the electromagnetic wave propagation. Comparison between Cr2O3 and TiO2 coatings on aluminium substrates showed reduced three orders of reduced reflectance for Cr2O3 coatings (for 1 mm aperture size) throughout the spectrum. It was concluded that for a similar bandgap, Cr2O3 coatings on aluminium substrate will yield improved optical performance than TiO2 coating, and hence more useful to fabricate opto-electronic devices. This accompanying file contains more detailed results to Figures 4-7.


FAISAL, N.H., SELLAMI, N., VENTURI, F., HUSSAIN, T., MALLICK, T., MUHAMMAD-SUKKI, F., BISHOP, A., UPADHYAYA, H., KATIYAR, N.K. and GOEL, S. 2021. Large scale manufacturing route to metamaterial coatings using thermal spray techniques and their response to solar radiation. [Dataset]. Hosted on OpenAIR [online]. Available from:

Acceptance Date Jun 18, 2021
Online Publication Date Jul 4, 2021
Deposit Date Jun 22, 2021
Publicly Available Date Jun 22, 2021
Publisher Robert Gordon University
Keywords Electromagnetic wave; Optical properties; Thermal spray coatings; APS; S-HVOF; Solar radiation
Public URL
Related Public URLs
Type of Data XLSX file and supporting text file.
Collection Date Jun 18, 2021
Collection Method Metamaterials gain their properties not from their composition, but purpose-designed artificial structures. Accordingly, this work examined to explore the feasibility of design and fabricating an artificial periodic planar configuration using suspension high velocity oxy fuel (S-HVOF) thermal spray and atmospheric plasma-spray (APS) coating methods, followed by their microstructural, material, and optical characterisation. The different types of substrates used in this study were mild carbon steel, pure aluminum, glass slide and indium tin oxide coated glass slides (ITO: In2O3/SnO2, note: ITO coated on both sides of the glass). The metal substrates were supplied by Laser Master, UK, whereas transparent glass slides (product code: S8902-1PAK) and ITO coated glass slide (with 150-300 Å film thickness, transmittance > 87%, refractive index: 1.517; product code: 576352) were obtained from Sigma Aldrich, UK. The substrates were cleaned using industrial methylated spirit to remove any debris or grease prior to the deposition. A more detailed description of the Methods and Methods and Results and Discussion can be found in the published article (