Ni–P/AAO nano-array composite structure assemblies with Ni and P grown in the pores of anodic aluminum oxide (AAO) membranes were prepared by electroless deposition. The results of SEM, TEM and SAED show that as-deposited Ni–P nanowires have an amorphous structure and a few nanocrystallites form after annealing. The optical absorption spectra reveal that, as the annealing temperature increases, the absorption band edge of the Ni–P/AAO composite structure is obviously blue shifted, which is attributed to a decrease of the internal pressure after heat treatment. Meanwhile, the annealed Ni–P/AAO nano-array composite structure exhibits the absorption behavior of a direct band gap semiconductor. Details of this behavior are discussed together with the implications for potential device applications.

中文翻译：

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热处理对Ni-P/AAO纳米阵列复合结构光吸收性能的影响

通过化学沉积制备了在阳极氧化铝 (AAO) 膜的孔隙中生长的 Ni-P/AAO 纳米阵列复合结构组件。SEM、TEM 和 SAED 的结果表明，沉积态的 Ni-P 纳米线具有无定形结构，退火后会形成一些纳米微晶。光吸收光谱表明，随着退火温度的升高，Ni-P/AAO复合结构的吸收带边缘发生明显的蓝移，这是由于热处理后内压降低所致。同时，退火后的 Ni-P/AAO 纳米阵列复合结构表现出直接带隙半导体的吸收行为。此行为的详细信息与对潜在设备应用的影响一起讨论。