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使用静电力显微镜在空气中确定CYTOP薄膜的表面电荷密度和电荷映射

Shalini Singh¹, Stefan A L Weber^2,3, Dhiman Mallick^1,4

¹School of Interdisciplinary Research, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.

Langmuir : the ACS journal of surfaces and colloids

|July 26, 2024

概括

本研究使用先进显微镜量化循环透明光学聚合物 (CYTOP) 薄膜的表面电荷. 负电荷在CYTOP上表现出优越的保留和定位,使能量收获和记忆设备的潜在应用成为可能.

科学领域:

材料科学材料科学材料科学
聚合物科学聚合物科学
表面科学是一门学科.

背景情况:

循环透明光学聚合物 (CYTOP) 是一种聚合物,在微电子技术中用于能量收集和存储设备.
这些设备需要高压分解,介电常数,透明度和电荷存储能力.
在CYTOP膜上进行的微量电荷分布,保留和放电研究尚未得到充分证实.

研究的目的:

在微尺度上对CYTOP膜的表面电荷进行量化和绘制地图.
调查电荷分布,保留和放电特性.
探索CYTOP在先进电子应用中的潜力.

主要方法:

使用凯尔文探针力显微镜 (KPFM) 和静电力显微镜 (EFM) 进行表面电荷分析.
雇佣的AFM导电尖端用于电荷写作实验.
在室温下直接量化和映射表面电荷.

主要成果:

估计表面电荷密度为1.4μC/cm2的正电荷和3.3μC/cm2的负电荷.
确定负电荷的电荷保留时间比正电荷要长得多.
在CYTOP表面观察到负电荷的更强的定位,并证明了电荷写入能力.

结论:

对于正负电荷,CYTOP具有明显的电荷保留和定位特性.
这些发现支持CYTOP在能源采集,传感,内存设备,安全和监控应用中的使用.
先进的表面探针显微镜技术为聚合物中的微量电荷动态提供了宝贵的见解.

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