Crippa P R, Cristofoletti V, Romeo N
Biochim Biophys Acta. 1978 Jan 3;538(1):164-70. doi: 10.1016/0304-4165(78)90260-x.
Natural and synthetic melanins have been studied by optical absorption and photoconductivity measurements in the range 200--700 nm. Both optical absorption and photoconductivity increase in the ultraviolet region, and a negative photoconductivity was observed with a maximum near 500 nm. This behaviour has been interpreted by the band model of amorphous materials and an "optical gap" of 3.4 eV has been determined.
通过在200 - 700纳米范围内的光吸收和光电导率测量对天然和合成黑色素进行了研究。在紫外区域，光吸收和光电导率均增加，并且观察到在500纳米附近有最大值的负光电导率。这种行为已由非晶材料的能带模型进行了解释，并且确定了“光学带隙”为3.4电子伏特。
