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논문 기본 정보

자료유형
학술저널
저자정보
Alaa M. Abd-Elnaiem (Assiut University) S. Moustafa (Assiut University) T. B. Asafa (University of Technology Ogbomoso)
저널정보
성균관대학교 성균나노과학기술원 NANO NANO Vol.14 No.11
발행연도
2019.1
수록면
86 - 96 (11page)

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초록· 키워드

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Porous anodic alumina (PAA) thin films, having interconnected pores, were fabricated from Cu-doped aluminum films deposited on p-type silicon wafers by anodization. The anodization was done at four different anodizing voltages (60 V, 70 V, 80V and 90 V) in phosphoric acid and two voltages (60V and 70 V) in oxalic acid. The aluminum and PAA samples were characterized by SEM and XRD while the pore arrangement, pore density, pore diameter, pore circularity and pore regularity were also analyzed. XRD spectra confirmed the aluminum to be crystalline with the dominant plane being (220), the Cu-rich phase have an average particle size of 15 ffi 5nm uniformly distributed within the Al matrix of 0.4-μm grain size. The steady-state current density through the anodization increased by 117% and 49% for oxalic and phosphoric acids, respectively, for 10V increase (from 60 to 70 V) in anodization voltage. Similarly, the etching rate increased by 100% for oxalic acid and by 40% for phosphoric acid which are responsible for 47% and 29% decreases in anodization duration, respectively. The highest value of circularity obtained for anodized Al–0.5wt.% Cu formed in oxalic acid at 60V was 0.86, and it was 0.80 for the phosphoric acid at 90 V. Anodization of Al–0.5wt.% Cu films allows the formation of circular pores directly on p-type silicon wafers which is of importance for future nanofabrication of advanced electronics. The results of anodized Al–0.5wt.% Cu thin film were compared with other anodized systems such as anodized pure Al and Al doped with Si.

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