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sams结构的红外显微技术
Infrared nanoscopy of structured SAMs |
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| 课程网址: |
http://videolectures.net/slonano07_kopf_ins/
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| 主讲教师: |
Ilona Kopf
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| 开课单位: |
波鸿鲁尔大学
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| 开课时间: |
2008-02-12
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| 课程语种: |
英语
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| 中文简介: |
一项具有挑战性的科学任务是对纳米级分辨率的分子进行无标签和非侵入性研究。由于红外区域中的显着吸收线，所谓的指纹区域，无孔近场扫描光学显微镜与独特的红外激光光谱的组合提供了用于纳米级自组装单层（SAM）的光谱表征的有效方法。第一个实验是在有机微结构单层的十八烷硫醇和生物素化的烷基硫醇上进行的，使用可调谐的CO激光作为辐射源，在1700 cm 1左右的特征酰胺I区域。通过我们的扫描近场红外显微镜（SNIM），我们能够记录频率依赖性单个单层的横向分辨率为90 x 90 nm2，对应于/ 60，远低于阿贝极限。生物素化的烷基硫醇的检测限估计为5×10 20 mol，相当于27 attogram。
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| 课程简介: |
A challenging scientific task is the label-free and non-invasive investigation of molecules with a nanometer scale resolution. Due to the significant absorption lines in the infrared region - the so-called fingerprint region - a combination of apertureless near-field scanning optical microscopy with unique infrared laser spectroscopy provides a powerful method for spectroscopic characterization of self-assembled monolayers (SAMs) at the nanoscale. First experiments were performed on organic microstructured monolayers of octadecanethiol and biotinylated alkylthiol using a tunable CO-Laser as radiation source in the characteristic amide I region around 1700 cm-1. With our scanning near-field infrared microscopy (SNIM) we were able to record the frequency dependence of a single monolayer with a lateral resolution of 90 x 90 nm2 corresponding to /60 which is well below the Abbe limit. The detection limit for biotinylated alkylthiol was estimated to be 5x10-20 mol corresponding to 27 attogram.
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| 关 键 词: |
纳米级分辨率; 红外区域; 光谱表征
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| 课程来源: |
视频讲座网
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| 最后编审: |
2019-09-21：cwx
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| 阅读次数: |
59
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