中文摘要：

利用自催化还原法制备了不同粒径的空心镍球，观察了它们的形貌并测量了空心镍球的粒径分布，研究了它们的光吸收性能。结果表明，在紫外-近红外区，随着粒径的减小，镍球的光吸收性能明显增强，纳米尺寸的镍球在紫外光区的吸收特性与大粒径镍球明显不同。总体而言，小粒径镍球在整个测量波长范围内的光吸收都比较强，整体变化幅度小，而大粒径镍球在整个波长范围内光吸收变化幅度很大。

英文摘要：

Hollow Ni spheres with different diameters have been synthesized by the autocatalytic reduction method. The morphologies, size distribution and optical absorption property of the hollow Ni spheres were investigated, indicating that when the hollow Ni spheres became smaller, the optical absorption intensity is obviously increased in ultraviolet - near infrared region. Additionally, in ultraviolet region, the optical absorption property of the hollow Ni spheres in nanoscale is distinctly different from that of the hollow Ni spheres with big diameter. On the whole, in the total measured wavelength region, the optical absorption property of the hollow Ni spheres with small diameter show high intensity and low amplitude of fluctuation, while the optical absorption property of the hollow Ni spheres with big diameter show high amplitude of fluctuation.