Figure 1

Morphological, microstructural, and physical characterizations of thermochromic powders HEMA resin, and 3D printed optical fibers. (A) SEM micrographs of different thermochromic pigment powders are shown as (i) blue, (ii) red, and (iii) orange to yellow. (B) The magnified SEM micrographs of respective thermochromic powders in figure (A). (C) SEM micrographs of cross-sectional views of mechanically fractured 3D printed thermochromic sensors are represented as (i), (ii), and (iii) in the figure. (D) XRD patterns of thermochromic powders are presented as (a) blue, (b) red, and (c) orange to yellow. (E) XRD patterns of 3D printed fiber sensors are presented as (a) transparent, (b) blue, (c) red, and (d) orange to yellow in the figure.