Encapsulation of Sexithiophene Molecules in Single‐Walled Carbon Nanotubes Using Supercritical CO2 at Low Temperature,Physica Status Solidi (B) - Basic Solid State Physics

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Encapsulation of Sexithiophene Molecules in Single‐Walled Carbon Nanotubes Using Supercritical CO2 at Low Temperature
Physica Status Solidi (B) - Basic Solid State Physics ( IF 1.5 ) Pub Date : 2020-07-28 , DOI: 10.1002/pssb.202000314
Ana Cadena ₁ , Bea Botka ₁ , Edit Székely ₂ , Katalin Kamarás ₁

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Successful encapsulation of sexithiophene (6T) molecules by two different methods is presented: sublimation filling at 400 °C and nanoextraction from supercritical carbon dioxide (sc‐CO₂) at 50 °C. Differences in the Raman spectra of the two samples indicate thermally induced polymerization during sublimation filling, increasing the electronic conjugation length of the chains inside the nanotubes. The thermal reaction is proven by heating the sc‐CO₂‐filled nanotubes after encapsulation. Although the conjugation length in the thiophene chain is increasing upon heating, no Raman signatures of graphene nanoribbons are observed.

中文翻译：

低温下使用超临界CO2在单壁碳纳米管中包封六噻吩分子

提出了通过两种不同方法成功填充六噻吩（6T）分子的方法：400°C升华填充和50°C超临界二氧化碳（sc-CO ₂）的纳米萃取。两个样品的拉曼光谱的差异表明在升华填充过程中热诱导聚合，从而增加了纳米管内部链的电子共轭长度。封装后通过加热填充sc-CO _2的纳米管证明了热反应。尽管噻吩链中的共轭长度随着加热而增加，但未观察到石墨烯纳米带的拉曼特征。

更新日期：2020-07-28

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