本研究係利用陽極氧化法製備出二氧化鈦奈米管陣列(TNA)，在室溫下以含氟的EG/H2O電解液中，利用陽極氧化法在純鈦表面製備了規則有序的TiO2奈米管陣列。
本實驗結果發現，平坦型的二氧化鈦奈米管陣列不具有場發之效應，可能是由於高密度的TiO2奈米管之間具有較高的屏蔽效應，降低了TiO2奈米管陣列的增強因子，從而影響了場發射的性能。但經過H2O2處理後，使二氧化鈦奈米管陣列形成聚集之形貌，場發射起始電場有明顯的提升。另一方面，石墨烯奈米帶有（約5 eV）的功函數，根據相關的研究，它可以減少二氧化鈦表面電子電洞對的複合，有利於提高場發射的性能。
而在氣體感測中，經過H2O2處理過之聚集型的二氧化鈦奈米管陣列(A-TNA)具有更多的比表面積及更多的氧缺陷，有利於提升對氫氣的感測能力，其氣體感測器顯示了有更高的響應（510％）比起平坦型的二氧化鈦奈米管陣列(P-TNA)感測器（454％）。

In this work, the TiO2 nanotube arrays (TNA) were synthesized in a NH4F/ethylene glycol (EG) electrolyte by using anodization method with operating voltages at room temperature. The plane TiO2 nanotube without field emission properties due to the higher density between TiO2 nanotubes to cause the large electric field screen effect.
Aggregated TiO2 nanotube arrays (A-TNA) were formed H2O2 post-treatment, which effective improve the field emission properties. On the other hand, graphene have a work function close to (∼5 eV), it can be reduced the electro-hole combination in the A-TNA. However, it is favorable for improving the performance of field emission.
In resulting, A-TNA possesses the higher surface area and more oxygen defects which is beneficial for the hydrogen gas sensing. The A-TNA gas sensor shows the higher response (510 %) than response of the TNA sensor (454 %) without H2O2 post-treatment.

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