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. 2024 Jun 21;10(12):e33223. doi: 10.1016/j.heliyon.2024.e33223

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© 2024 The Author(s)

This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Fig. 13 — SEM images of test specimens made of PETG coated with nHA

and PLA filament coated with nHA

(a) test specimen made of PETG filament coated with nHA: magnification 250×

(b) test specimen made of PLA filament coated with nHA: magnification 250×

(c) test specimen made of PETG filament coated with nHA: magnification 500×

(d) test specimen made of PLA filament coated with nHA: magnification 500×

▲ indicate incorporated nHA particles with sizes from 2 μm to 12.5 μm

* indicates partially incorporated nHA particles with a size of 10 μm

(e) test specimen made of PETG filament coated with nHA: magnification 1,000×

(f) test specimen made of PLA filament coated with nHA: magnification 1,000×

▲ indicate incorporated nHA particles with sizes from 2 μm to 12.5 μm

* indicates partially incorporated nHA particles with a size of 10 μm

(g) test specimen made of PETG filament coated with nHA: magnification 2,000×

▲ indicate incorporated nHA particles with sizes from 2 μm to 5 μm

* indicates partially incorporated nHA particles with a size of 10 μm

(h) test specimen made of PLA filament coated with nHA: magnification 2,000×

▲ indicate incorporated nHA particles with sizes from 2 μm to 12.5 μm

* indicates partially incorporated nHA particles with a size of 10 μm.