Light‐Switchable Single‐Walled Carbon Nanotubes Based on Host–Guest Chemistry
Light‐Switchable Single‐Walled Carbon Nanotubes Based on Host–Guest Chemistry
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DOI：
10.1002/adfm.201300434
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发表时间：
2013-10
影响因子：
19
通讯作者：
Zanru Guo;Yujun Feng;Dingwei Zhu;Shuai He;Hanbin Liu;X. Shi;Jing Sun;M. Qu
中科院分区：
文献类型：
--
作者：
Zanru Guo;Yujun Feng;Dingwei Zhu;Shuai He;Hanbin Liu;X. Shi;Jing Sun;M. Qu
通过偶氮苯末端的聚氧化乙烯（AzoPEO）与附着在纳米管侧壁上的芘标记的主体之间的可逆的主-客体相互作用，通过π-π堆积，开发了一种新型的光开关“智能”单壁碳纳米管（SWNTs）。单壁碳纳米管杂化物不仅在纯水中分散良好，而且在紫外光和可见光交替照射下表现出可切换的分散/聚集状态。此外，单壁碳纳米管杂化物分散体初步用作涂覆流体以形成透明导电膜。通过无污染的UV处理去除分散剂AzoPEO，降低薄膜的电阻。这种光开关单壁碳纳米管杂化物，具有“绿色”触发和完整的纳米管结构，可以在生物医学传感器，器件制造等方面找到潜在的应用。此外，这种可逆的主客体相互作用系统可以打开通过其他常见聚合物控制单壁碳纳米管分散状态的可能性。
A new type of light‐switchable “smart” single‐walled carbon nanotube (SWNTs) is developed by the reversible host–guest interaction between azobenzene‐terminal PEO (AzoPEO) and pyrene‐labeled host attached on the sidewalls of nanotubes via π–π stacking. The SWNTs hybrids not only are well dispersed in pure water, but also exhibit switchable dispersion/aggregation states upon the alternate irradiation of UV and visible light. Moreover, the SWNTs hybrids dispersion is preliminarily used as coating fluid to form transparent conductive films. The dispersant AzoPEO is removed by the contamination‐free UV treatment, decreasing the resistance of the films. This kind of light‐switchable SWNTs hybrids, possessing a ‘‘green’’ trigger and intact structure of the nanotube, may find potential applications in sensor of biomedicines, device fabrication, etc. Additionally, such a reversible host–guest interaction system may open up the possibility to control the dispersion state of SWNTs by other common polymers.