In the Story, Alister acquires camo-dye made from quasicrystals. With controlled electrical charges, the crystals 'defect' property can be manipulated to change colour. Here's the catalyst for the idea.
From Science Daily (16 Feb, 2012) Strange New Nano-Region Can Form in Quasicrystals
"In crystals, a "defect" refers to any departure from perfect structural symmetry. While the term suggests an undesirable quality, not all defects are bad; many control or influence key material properties, such as chemical purity, mechanical strength, conductivity, color, corrosivity or surface properties.
Rubies, for instance, are red due to a defect that turns an otherwise non-descript crystal into a valuable gem."
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