样品剥落后，应力的消除使红外吸收峰位向低波数移动。
When the films were peeled off the substrate, stress relaxes and the IR absorption peaks shifted to lower wave numbers.
并且拉曼散射光谱向低波数方向移动，有助于增加光致电子的跃迁几率，提高多相光催化过程的本征量子效率。
The Raman scattering shifted to low wave number direction helped to increase the transition probability of photon-generated electrons and improved photoefficiency.
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