Effect of temperature on the selection of semiconducting single walled carbon nanotubes using Poly(3-dodecylthiophene-2,5-diyl)
Effect of temperature on the selection of semiconducting single walled carbon nanotubes using Poly(3-dodecylthiophene-2,5-diyl)
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DOI：
10.1016/j.carbon.2014.11.037
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发表时间：
2015-04-01
期刊：
影响因子：
10.9
通讯作者：
Loi, Maria Antonietta
中科院分区：
文献类型：
--
作者：
Gomulya, Widianta;Rios, Jorge Mario Salazar;Loi, Maria Antonietta
我们报告了温度对聚（3-十二烷基噻吩-2,5-diy1）包裹单壁碳纳米管（SWNT）选择性分散的影响的研究。通过改变加工温度来控制聚合物聚集，研究了聚合物链和单壁碳纳米管之间的相互作用机制。采用光吸收和光致发光测量（包括时间分辨光致发光光谱）来研究不同聚集状态的聚合物与碳纳米管之间的相互作用程度。在低加工温度下，结果与聚合物链的平坦化以及 SWNT 作为聚合物聚集种子的作用一致。通过分子动力学模拟的实验证明和研究，相邻聚合物包裹的单壁碳纳米管之间的烷基尾部相互交叉而形成小簇，从而允许形成单壁碳纳米管束。束内管之间的相互作用（反映在聚合物光致发光动力学的变化中）可以通过加热样品来抑制。 (C) 2014 Elsevier Ltd. 保留所有权利。
We report on the investigation of the temperature effect on the selective dispersion of single-walled carbon nanotubes (SWNTs) by Poly(3-dodecylthiophene-2,5-diy1) wrapping. The interaction mechanism between polymer chains and SWNTs is studied by controlling the polymer aggregation via variation of the processing temperature. Optical absorption and photoluminescence measurements including time resolved photoluminescence spectroscopy are employed to study the degree of interaction between the polymer in different aggregation states and the carbon nanotubes. At low processing temperatures, results are consistent with the planarization of the polymer chains and with SWNTs working as seeds for polymer aggregation. The formation of small clusters due to the inter-digitation of alkyl tails between neighboring polymer-wrapped SWNTs allows the formation of the SWNT bundles, as experimentally evidenced and investigated by molecular dynamics simulations. The interaction between the tubes within the bundles, which is reflected in the variation of the photoluminescence dynamics of the polymer, can be suppressed by warming up the sample. (C) 2014 Elsevier Ltd. All rights reserved.