27 August 2009 Pyroelectric nanocomposite thin films containing triglycine sulfate nanocrystals with uniform polar orientation
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Abstract
A new pyroelectric polar nanocomposite thin film is presented. A dense array of aluminium oxide cylindrical nanopores is used as a template to grow pyroelectric nano-crystals of TriGlycine Sulfate (TGS). The crystals are grown inside nanopores having an average diameter of 14±4nm and a length of 0.5 micron. The crystals are grown with a preferred crystallographic orientation having their polar axis [010] aligned in vertical to the film plane. The pyroelectric response at different temperatures is measured using the dynamic method. The dielectric characterization reveals resistivity of about 1E-9 ohm-m, dielectric loss (tan(δ)) of about 0.03, and relative dielectric permittivity of about 10 at room temperature which increases to a maximum value at the ferroelectric-paraelectric phase transition. The pyroelectric coefficient of the film is about 3.5 μC/m2K and the pyroelectric voltage figure of merit is about 40 kVm-1K -1.
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M. Nitzani, R. Yasinov, S. Berger, "Pyroelectric nanocomposite thin films containing triglycine sulfate nanocrystals with uniform polar orientation", Proc. SPIE 7419, Infrared Systems and Photoelectronic Technology IV, 741906 (27 August 2009); doi: 10.1117/12.825670; https://doi.org/10.1117/12.825670
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