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应用离子束溅射技术制备了纳米颗粒铜膜，并在此基础上对其光谱特性进行了研究。结果表明，在特定波长出现了与连续薄膜不同的反常光吸收现象。
Nanoparticle Cu films were prepared by ion beam sputtering and their spectral properties were studied. The results show that there is anomalous absorption of light at a specific wavelength, which is different from the continuous thin film.