Tomographic imaging and scanning thermal microscopy: thermal impedance tomography
Thermochimica Acta(2002)
摘要
The application of tomographic imaging techniques developed for medical applications to the data provided by the scanning thermal microscope will give access to true three-dimensional information on the thermal properties of materials on a micrometer length scale. In principle, the technique involves calculating and inverting a sensitivity matrix for a uniform isotropic material, collecting ordered data at several modulation frequencies, and multiplying the inverse of the matrix with the data vector. In practice, inversion of the matrix is impractical, and a novel iterative technique is used. Examples from both simulated and real data are given.
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关键词
Scanning thermal microscopy,Tomographic imaging,Sensitivity matrix,Polymers
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