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Researchers have created a color atlas for 466 unique varieties of single-walled carbon nanotubes.
The researchers detail the nanotube color atlas in a study about a new method to predict the specific colors of thin films made by combining any of the 466 varieties.
“Carbon, which we see as black, can appear transparent or take on any color of the rainbow,” says Esko Kauppinen, a physicist at Aalto University in Finland and corresponding author of the study in
“The sheet appears black if light is completely absorbed by carbon nanotubes in the sheet. If less than about half of the light is absorbed in the nanotubes, the sheet looks transparent. When the atomic structure of the nanotubes causes only certain colors of light, or wavelengths, to be absorbed, the wavelengths that are not absorbed are reflected as visible colors.” ....

Nan Wei , Junichiro Kono , Esko Kauppinen , Finnish Funding Agency For Technology , Aalto University , University Of Utah , Kauppinen Group Aalto , Aalto University Energy Efficiency Research Program , Rice Applied Physics Graduate Program , Dalian Maritime University , European Union , Academy Of Finland , Rice University , Applied Physics Graduate , Peking University , Energy Efficiency Research Program , Finnish Funding Agency , Alberta Technical University , Munich International Graduate School , Hybrid Functional , நான் வெய் , எஸ்கோ கௌப்பினேன் , ஆல்டோ பல்கலைக்கழகம் , பல்கலைக்கழகம் ஆஃப் உட்டா , கௌப்பினேன் குழு ஆல்டோ , ஆல்டோ பல்கலைக்கழகம் ஆற்றல் செயல்திறன் ஆராய்ச்சி ப்ரோக்ர்யாம் ,