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The Search for Ferroelectric domain structures in carbohydrate glasses using atomic force microscopy

机译:利用原子力显微镜寻找碳水化合物玻璃中的铁电畴结构

摘要

D-glucose was studied as a possible candidate for ferroelectric domain imaging using an Atomic Force Microscope (AFM). The large dipole moment of carbohydrates is such that they may show localized ferroelectric domain formation in liquid phase. Samples were heated at their melting point on glass slides and then left to cool to room temperature in a desiccator. Differential Thermal Analysis (DTA) was used to test the effectiveness of this method, and it was found that the oven preparation created samples with 41% crystallinity, where both a glass transition and sharp melting peak were observed. DTA was again used to find a way to create a better amorphous sample. An assessment of the effect of cooling rate on glass formation was conducted using a Differential Scanning Calorimeter (DSC). Surface images of a ferroelectric ceramic and the surface of an amorphous glucose sample were taken using AFM Constant Force Topography.
机译:使用原子力显微镜(AFM)研究了D-葡萄糖作为铁电畴成像的可能候选对象。碳水化合物的大偶极矩使得它们可以在液相中显示局部铁电畴的形成。在载玻片上将样品加热至熔点,然后在干燥器中冷却至室温。使用差热分析(​​DTA)来测试此方法的有效性,发现烤箱制备方法产生的样品具有41%的结晶度,同时观察到玻璃化转变和尖锐的熔融峰。再次使用DTA来找到创建更好的无定形样品的方法。使用差示扫描量热仪(DSC)评估冷却速率对玻璃形成的影响。铁电陶瓷的表面图像和无定形葡萄糖样品的表面是使用AFM恒力地形图拍摄的。

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