Electrochromism: Nanoblock WO3

Nanoblock WO3 is related to the concept of electrochromism. More precisely, Nanoblock WO3 has an electrochromic effect, which can change color under the action of an external electric field. According to the experts, the reason why nano WO3 has an electrochromic effect is due to the surface effect of the nanomaterials, which makes the oxygen ions on the surface of WO3 grains have high activity and can migrate in the sample, and tungsten ions can be combined or separated with electrons under the action of an external electric field, so that the sample changes color with external voltage.

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However, in conventional WO3 bulk samples, oxygen ions cannot migrate and tungsten ions do not have sufficient activity, so the samples cannot be discolored. In addition, experts also introduced that since the coloring /fading state can be changed by simply changing the voltage polarity, and discoloration will not affect and destroy the structure and appearance of the material, so the electrochromic effect of the nanoblock WO3 may lead to some new applications. Now, when it comes to electrochromism, people think of WO3.

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