Two-Dimensional Gradient Mapping Technique Useful for Detailed Spectral Analysis of Polymer Transition Temperatures

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• 作者：Young Mee Jung ; Hyeon Suk Shin ; Seung Bin Kim ; Isao Noda
• 刊名：Journal of Physical Chemistry B
• 出版年：2008
• 出版时间：March 27, 2008
• 年：2008
• 卷：112
• 期：12
• 页码：3611 - 3616
• 全文大小：273K
• 年卷期：v.112,no.12(March 27, 2008)
• ISSN：1520-5207

文摘

This paper demonstrates the potential of a two-dimensional (2D) gradient mapping technique that utilized theeigenvalue manipulating transformation (EMT) of the spectral data set. The EMT technique, by lowering thepower of a set of eigenvalues associated with the original data, enhances the contributions of minor principlecomponents (PCs). The operation converts the original spectral data set to the one with subtle differencesamong the responses of the system being exaggerated. Small shoulders and obscure minor features may becomemuch more visible, because such small differentiating features are often captured only by the minor PCsenlarged by the EMT treatment. This improvement for 2D mapping is potentially very important to determinethe transition temperatures, which are not readily detected in convention spectral analysis.