| Budget Amount *help |
¥49,790,000 (Direct Cost: ¥38,300,000、Indirect Cost: ¥11,490,000)
Fiscal Year 2013: ¥12,870,000 (Direct Cost: ¥9,900,000、Indirect Cost: ¥2,970,000)
Fiscal Year 2012: ¥14,690,000 (Direct Cost: ¥11,300,000、Indirect Cost: ¥3,390,000)
Fiscal Year 2011: ¥22,230,000 (Direct Cost: ¥17,100,000、Indirect Cost: ¥5,130,000)
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| Research Abstract |
There are many industrial applications for coloured pigments that have anti-fading properties. Developing a low-cost, high-volume production method for anti-fading pigments that have low toxicity and minimal environmental impact may support their widespread use. To accomplish this goal, we need to prepare pigments using abundant and environmentally friendly chemical compounds. We demonstrated that the aggregation of fine, submicron silica spherical particles produces various colours. Because the microstructure of this aggregation is isotropic and has short-range order on a length scale comparable to optical wavelengths, angle-independent structural colour caused by wavelength-specific constructive reflection is exhibited. The saturation of colour from this aggregation can be increased by adding a small amount of a conventional black particle. Colourful green pigments can be prepared by combining different sizes of fine submicron silica spherical particles with black particle.
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