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自組裝結構增強茶葉黑色素半導體特性

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圖  2 . 1  黑色素 , (a)  動物性黑色素  ( Eumelanin)  ,(b)  茶葉黑色素  (Tea  melanin)  2 . 1 . 1    非晶態薄膜          黑色素非晶態薄膜數十年來廣為科學家所研究,其中又以動物黑色素 與合成黑色素為主。大多數科學家往往致力於表面形貌、光學特性、以及 分子結構等研究,對於電性與結構的文獻付之闕如。茶葉黑色素分子的骨 幹具備交互的共軛結構  (  圖  2
圖  2 . 6  聚乙炔分子能階狀態圖,當共軛長度增加時,能隙Eg最隨之變小。        過去幾年,奈米碳管與導電性聚合分子已是分子電子元件發展上最熱 門的兩類材料,然而以導電性聚合分子作為電子元件建構模組有如下的特 點:  A
圖  2 . 7 β-胡蘿蔔素  此外,若以DNA、Nuceoside、ET proteins、…等作為電子元件的材料, 則將使其功能性密度大幅提升,預期可附加的潛在優勢如下:  F
圖  4 . 5    電流—電壓曲線圖,( a ) 60 nm,( b ) 80 nm nanogap。
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