雞蛋白於非揮發性生物憶阻器之研製

本文主旨在於探討雞蛋白應用於生物憶阻器的製作方法以及操作特性。藉由利用雞蛋白作為絕緣層材料製作憶阻器元件，形成一個金屬層／絕緣層／金屬層三明治結構，可觀察到顯著的雙極性電阻式開關特性。從雞蛋白元件的1/f雜訊特性測量結果也可以觀察到，該元件的記憶體開關行為是由傳導細絲的形成和斷裂所造成。傳導細絲的形成和斷裂的主要物理機制為氧擴散以及金屬離子的電化學氧化還原，該機制可藉由飛行式二次離子質譜儀和導電式原子力顯微鏡量測結果獲得證實。元件操作特性在蛋白加熱變性後可獲得顯著提升，展現出超過500次的連續開關操作，同時資料耐久度也獲得改善，以及高於10^3之開關電流比。從研究結果顯示，雞蛋白在製作非揮發性記憶元件相關應用領域是一個具有高度發展潛力與產業前景的天然物材料。

關鍵字

非揮發性憶阻器元件；電阻式記憶體元件；細絲傳導機制

並列摘要

The objective of this study is to demonstrate the fabrication and characterization of chicken egg albumen bio-memristors. Utilizing egg albumen as an insulator for the fabrication of memristor devices comprising a metal/insulator/metal sandwich structure, significant bipolar resistive switching behavior can be observed. The 1/f noise characteristics of the albumen devices were measured, and the results suggested that their memory behavior could be ascribed to the formation and rupture of conductive filaments. Oxygen diffusion and electrochemical redox reaction of metal ions under a sufficiently large electric field are the principal physical mechanisms of the formation and rupture of conductive filaments; these mechanisms were observed by analysis of the time-of-flight secondary ion mass spectrometry (TOF-SIMS) and conductive atomic force microscopy (C-AFM) measurement results. The switching property of the devices were remarkably improved by heat-denaturation of proteins; reliable switching endurance of over 500 cycles accompanied by excellent data retention time and an on/off current ratio (Ion/off) of higher than 10^3 were also observed. Both resistance states could be maintained for a suitably long time (>10^4 s). The experiment results of the present study reveals for the first time that chicken egg albumen is a promising material for nonvolatile memory applications.

並列關鍵字

nonvolatile bio-memristor ； resistive memory device ； filament conduction mechanism

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