本篇論文之實驗方向在以運用電化學沈積法(electrodeposition)，結合聚碳酸酯膜版(polycarbonate membranes ; PC template)技術，以硫酸銅溶液作為銅離子提供源，採取直流電鍍方式於銅極板上沈積具有奈米結構的銅晶核(顆粒直徑 : 50 nm & 100 nm) ; 續藉其氧化銅之自催化機制(self-catalytic mechanism)，在高純度的氧氣氛下，經氣固反應(gas-solid reaction)以合成高規則順向排列性的氧化銅奈米纖維(CuO nanofibers film)。
氧化銅奈米纖維經X光繞射儀(XRD)、X光光電子譜儀(XPS)、掃描式電子顯微鏡(SEM)、穿透式電子顯微鏡(TEM)等儀器分析得知 : 其成分符合銅氧比例(Cu : O = 1 : 1)，線徑分別介於50-100nm，纖維密度介於107-108/cm2 ; 實驗所得氧化銅奈米纖維形顯示其生成形貌與聚碳酸酯膜版的孔徑大小與孔洞密度存有絕對相依性。再藉由光電子激發光譜(photoluminescence spectrum ; PL spectrum)分析其半導体特性，發現氧化銅奈米纖維之能隙值(band-gap energy)為 ~1.67eV(略小於銅塊材之1.85eV) ; 並可觀察在較高製程溫度下，隨著纖維徑長縮小(由100nm縮至50nm)，會導致PL頻譜產生紅位移的趨勢。

將此具高度順向排列性的氧化銅奈米纖維應用於電子場發射(electron field emission)測試上。經實驗結果證實，此奈米結構材料具有場發射效應，開啟電壓(場)(turn-on voltage ; turn-on field)值約為6-7V/µm ; 續對其F-N曲線計算得氧化銅奈米纖維之功函數值約在3.1-4.3eV間(略小於銅塊材之5.3eV)。經過多次循環測試後，氧化銅奈米纖維材料仍能維持一定的場發射電流密度值，且材料排列結構符合場發射平面顯示器應具備之高亮點密度(107-108亮點數/cm2，遠高於FED文獻提出之105亮點數/cm2 )，具有作為場發射源材料的高度潛力。

One-dimensional well-ordered CuO nanofibers have been synthesized by electrodposition followed by the self-catalytic growth. Firstly, the nuclei sites of copper were distributed uniformly on copper substrate, using polycarbonate (PC) template and high operation-voltage input (electric field is 15 V/cm) in a copper sulphate solution. According to pore diameter of PC membrane, two different sizes of copper nuclei could be well controlled at 50-60 and 100-150 nm.
With after-treatment in oxidation reaction, the electrodeposited copper nuclei have been transformed into the nanofibers of the copper oxide. The characteristics of nanofibers were examined by X-ray diffraction (XRD), X-ray photoelectron spectrometer (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Results showed that the highly ordered CuO nanofibers had a mean length of 6-8 μm, and their average diameters were accorded with pore size of PC membrane. The band gap of the CuO nanofibers was calculated to be 1.67 eV from the photoluminescence (PL) absorption spectrum, which is apparently smaller than the reported value for the bulk CuO (Eg = 1.85 eV)

Typical turn-on voltage for the CuO nanofiber arrays was detected at about 6-7 V/μm with an emission area of 1 mm2. The Fowler-Nordheim model was employed to analyze the I-V data obtained. The work function of the nanofibers was estimated in range of 3.1-4.3 eV. Based on the above analyses, the highly-ordered CuO nanofiber array can be a promising candidate as field emission emitters.

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