Factors affecting the height and phase images in tapping mode atomic force microscopy. Study of phase-separated polymer blends of poly(ethene-co-styrene) and poly(2,6-dimethyl-1,4-phenylene oxide)
Factors affecting the height and phase images in tapping mode atomic force microscopy. Study of phase-separated polymer blends of poly(ethene-co-styrene) and poly(2,6-dimethyl-1,4-phenylene oxide)
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DOI：
10.1021/la970091m
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发表时间：
1997-07-09
期刊：
影响因子：
3.9
通讯作者：
Whangbo, MH
中科院分区：
文献类型：
--
作者：
Bar, G;Thomann, Y;Whangbo, MH
采用轻敲模式原子力显微镜（AFM）对两种聚合物（聚乙烯-苯乙烯共聚物（PES）和聚（2，6-二甲基-1，4-苯醚）（PPO））的共混物进行了研究，使用不同的驱动振幅A（0）和设定点振幅比r（sp）= A（sp）/A（0），其中A（sp）是设定点振幅。在PPO/PES共混物样品的高度和相位图像中，化学性质不同区域的相对对比度敏感地取决于r（sp）和A（0）值。随着针尖-样品力从小到大增加，PPO/PES共混物样品的相位和高度图像都可以经历两次对比度反转。这使得很难在不进行额外实验的情况下将高度和相位图像的特征分配给不同的化学成分。通过分析影响相移和振幅阻尼对r（sp）和A（0）的依赖性的几个因素来解释相位和高度图像。
Blends of two polymers, poly(ethene-co-styrene) (PES) and poly(2,6-dimethyl-1,4-phenylene oxide) (PPO), were examined with tapping mode atomic force microscopy (AFM) using various values of the driving amplitude A(0) and set-point amplitude ratio r(sp) = A(sp)/A(0), where A(sp) is the set-point amplitude. In height and phase images of PPO/PES blend samples, the relative contrast of chemically different regions depends sensitively on the r(sp) and A(0) values. As the tip-sample force is increased from small to large, both phase and height images of PPO/PES blend samples can undergo a contrast reversal twice. This makes it difficult to assign the features of height and phase images to different chemical components without performing additional experiments. Phase and height images were interpreted by analyzing several factors that affect the dependence of phase shift and amplitude damping on r(sp) and A(0).