Near-Field Scanning Optical Microscopy (NSOM) Studies of the Relationship between Interchain Interactions, Morphology, Photodamage, and Energy Transport in Conjugated Polymer Films
Near-Field Scanning Optical Microscopy (NSOM) Studies of the Relationship between Interchain Interactions, Morphology, Photodamage, and Energy Transport in Conjugated Polymer Films
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DOI：
10.1021/jp004456e
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发表时间：
2001-05
影响因子：
3.3
通讯作者：
Thuc-Quyen Nguyen and;B. Schwartz;R. Schaller;Justin C. Johnson;Lynn F. Lee;and Louis H. Haber;R. Saykally
中科院分区：
文献类型：
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作者：
Thuc-Quyen Nguyen and;B. Schwartz;R. Schaller;Justin C. Johnson;Lynn F. Lee;and Louis H. Haber;R. Saykally
越来越清楚的是，共辄聚合物膜的浇铸方式影响聚合物链之间的相互作用，从而影响膜的光学和电学性质。鉴于以不同方式浇铸的共轭聚合物膜也显示出不同的纳米尺度表面形貌，出现的问题是：共轭聚合物膜的表面形貌、局部链堆积和局部电子性质之间的相关性是什么？在本文中，我们解决这个问题，使用荧光近场扫描光学显微镜（NSOM）检查薄膜的聚（2-甲氧基-5-（2 '-乙基己氧基）-1，4-苯撑乙烯）（MEH-PPV），以不同的方式制备。空间分辨的光致发光（SRPL）光谱上收集的纳米尺度的地形特征（“凸点”）所表现出的旋转浇铸MEH-PPV膜的顶部显示出增强的红色部分的发射相对于从膜的平坦区域收集的光谱。此外，光氧化…
It is becoming increasingly clear that the way in which a conjugated polymer film is cast affects the interactions between polymer chains and thus the optical and electrical properties of the film. Given that conjugated polymer films cast in different ways also show different nanometer-scale surface topographies, the question that arises is: What is the correlation between surface topography, local chain packing, and the local electronic properties of a conjugated polymer film? In this paper, we address this question using fluorescence near-field scanning optical microscopy (NSOM) to examine films of poly(2-methoxy-5-(2‘-ethylhexyloxy)-1,4-phenylene vinylene) (MEH-PPV) that were prepared in different ways. The spatially resolved photoluminescence (SRPL) spectra collected on top of the nanometer-scale topographic features (“bumps”) exhibited by spin-cast MEH-PPV films show an enhancement of the red portion of the emission relative to spectra collected from flat regions of the film. Moreover, photooxidativ...