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Beilstein J. Nanotechnol. 2022, 13, 1167–1184, doi:10.3762/bjnano.13.98
Figure 1: Microneedle classification criteria.
Figure 2: A schematic representation of five different MN types used to facilitate transdermal drug delivery....
Figure 3: Illustrated examples of techniques used to coat MNs. (a) Dip coating. (b) Gas-jet drying. (c) Spray...
Figure 4: Stereomicroscopic image of the microneedle patch (e) and magnification of the microneedles (f), sca...
Figure 5: Microscopic image of dissolving MNs manufactured by Albadr and co-workers. Figure 5 was reproduced from [176] (©...
Figure 6: Microscopic image of the MNs obtained by Amer and Chen. Figure 6 was adapted from [178], M. Amer; R. K. Chen, "H...
Figure 7: The physical appearance of 20.06% GAN + 5% HA + 1% FS under (A) digital microscope and (B) scanning...
Figure 8: Individual steps in the production and use of microneedles containing nanoparticles developed by Wu...
Figure 9: The hybrid detachable microneedle developed by Lee et al. Figure 9 was adapted from [183], Acta Biomaterialia, v...
Figure 10: Cryo-sectioned optical image of a MN tip (stained with rhodamine B) embedded in the sclera by Lee e...
Figure 11: The photography and the principle of operation of patches developed by Than et al. Figure 11 was reproduced ...