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近年来,光声技术(Photoacoustic technique)被广泛地用于几乎各类样品的物理、化学性质研究.而深度剖面分析也是光声技术的一个重要方面,它对样品表面光、热学和化学性质变化的测定具有很大的优势.对于光声剖面分析,我们通常测定光声信号的同相成分(PcosФ)和交相成分(PsinФ),这里P的光声信号强度,Ф为位相.而光声谱则可以PcosФ和PsinФ来表示.对于单一物质,通常Ф是不变的.但在某些体系,如过渡金属配合物,由于不
In recent years, the photoacoustic technique has been widely used for the study of the physical and chemical properties of almost all types of samples, while depth profile analysis is also an important aspect of photoacoustic technology. Its effect on the change of the surface light, thermal and chemical properties For the photoacoustic profile analysis, we usually measure the in-phase component (PcosФ) and the phase-contrast component (Psinφ) of the photoacoustic signal, where the photoacoustic signal intensity of P, Φ is the phase, while the photoacoustic spectrum Can be expressed as PcosΦ and Psinφ. For a single material, usually Ф is invariable, but in some systems, such as transition metal complexes,