Large scale, selective dispersion of long single-walled carbon nanotubes with high photoluminescence quantum yield by shear force mixing
Large scale, selective dispersion of long single-walled carbon nanotubes with high photoluminescence quantum yield by shear force mixing
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DOI：
10.1016/j.carbon.2016.05.002
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发表时间：
2016-08-01
期刊：
影响因子：
10.9
通讯作者：
Zaumseil, Jana
中科院分区：
文献类型：
--
作者：
Graf, Arko;Zakharko, Yuriy;Zaumseil, Jana
半导体单壁碳纳米管（SWCNT）与共轭聚合物的选择性分散通常涉及破坏和缩短纳米管的苛刻超声处理方法。在这里，我们使用简单的高速剪切力混合（SFM）以高产率和大体积将几乎单手性的（6，5）SWCNTs与聚[（9，9-二辛基芴基-2，7-二基）-alt-co-（6，6 '-{2，2'-联吡啶}）]（PFO-BPy）分散在甲苯中。这种高度可扩展的过程中分散的单壁碳纳米管的卓越品质的平均管长度为1.82 μ m和合奏光致发光量子产率（PLQY）的2.3%。对于单壁碳纳米管的第一次，我们描述和应用绝对PLQY测量，而不需要任何参考发射器。我们直接比较平均单壁碳纳米管长度，PLQY，线宽和斯托克斯位移的值，其他分散方法，包括浴和尖端超声处理，以及其他分选方法，如凝胶色谱。我们发现，SFM的结果在较长的单壁碳纳米管的分散体具有更高的平均PLQY比任何其他技术，从而使其成为一个理想的方法，用于分选大量的长，高品质和纯半导体单壁碳纳米管。(C)2016作者爱思唯尔有限公司出版
Selective dispersion of semiconducting single-walled carbon nanotube (SWCNTs) with conjugated polymers typically involves harsh sonication methods that damage and shorten the nanotubes. Here, we use simple high speed shear force mixing (SFM) to disperse nearly monochiral (6,5) SWCNTs with poly [(9,9-dioctylfluorenyl-2,7-diyl)-alt-co-(6,6'-{2,2'-bipyridine})] (PFO-BPy) in toluene with high yield and in large volumes. This highly scalable process disperses SWCNTs of exceptional quality with an average tube length of 1.82 mu m and an ensemble photoluminescence quantum yield (PLQY) of 2.3%. For the first time for SWCNTs, we describe and apply absolute PLQY measurements, without the need for any reference emitter. We directly compare values for average SWCNT length, PLQY, linewidth and Stokes shift to other dispersion methods, including bath and tip sonication, as well as other sorting methods such as gel chromatography. We find that SFM results in dispersions of longer SWCNT with higher average PLQY than any other technique, thus making it an ideal method for sorting large amounts of long, high quality and purely semiconducting SWCNTs. (C) 2016 The Authors. Published by Elsevier Ltd.