Quantum confinement and carbon nanodots - A conceptual view of the origin of diffuse interstellar bands

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Table 2

Modelled bands in the DIB range (λ ≃ 425-877 nm).

transition n	wavelengths (nm)	Radii (nm)	No. of bands
Nanodiamond - 21 of 43 radii → 24 bands
1 → 2	457.38-837.22	1.02-1.38	9
1 → 3	448.83-849.50	1.65-2.27	6
1 → 4	433.33-780.80	2.22-2.98	5
1 → 5	488.00-823.02	2.98-3.87	4
a-C(:H) - 109 of 133 radii → 137 bands
1 → 2	434.81-845.56	1.19-1.66	14
1 → 3	433.14-866.73	1.94-2.74	32
1 → 4	431.23-870.71	2.65-3.76	55
1 → 5	429.23-613.79	3.34-3.99	36

Notes. For particle radii from 0.4 to 4 nm for both nanodiamond and a-C(:H) CNDs. Note that 14% [26%] of the nanodiamond [a-C(:H)] CNDs generate two bands, and only two in the DIB wavelength range.

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