Polymer crystallization-driven, periodic patterning on carbon nanotubes.
Polymer crystallization-driven, periodic patterning on carbon nanotubes.
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DOI：
10.1021/ja056923h
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发表时间：
2006-01
影响因子：
15
通讯作者：
Lingyu Li;Christopher Y. Li;C. Ni
中科院分区：
文献类型：
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作者：
Lingyu Li;Christopher Y. Li;C. Ni
我们在此报告了一种独特的手段，使用受控的聚合物结晶方法在单个碳纳米管（CNT）上周期性地图案化聚合物材料。一维（1D）碳纳米管周期性地装饰与聚合物层状晶体，导致纳米混合串（NHSK）结构。聚合物薄层的周期性在20至150 nm之间变化。串约5-10 nm厚（沿着CNT方向），横向尺寸约为20 nm至微米，这可以通过改变结晶条件容易地控制。聚乙烯和尼龙66都成功地修饰在单壁碳纳米管（SWNT），多壁碳纳米管（MWNT），以及气相生长的碳纳米纤维（CNF）。其形成机制属于“尺寸相关的软外延”。由于NHSK形成条件取决于CNT结构，因此它进一步为CNT分离提供了独特的机会。报道的方法打开了一个门户，定期图案化聚合物和不同的功能基团在个别碳纳米管在有序和受控的方式，一个有吸引力的研究领域，尚未探索。
We report herein a unique means to periodically pattern polymeric materials on individual carbon nanotubes (CNTs) using a controlled polymer crystallization method. One-dimensional (1D) CNTs were periodically decorated with polymer lamellar crystals, resulting in nano-hybrid shish-kebab (NHSK) structures. The periodicity of the polymer lamellae varies from 20 to 150 nm. The kebabs are approximately 5-10 nm thick (along CNT direction) with a lateral size of approximately 20 nm to micrometers, which can be readily controlled by varying crystallization conditions. Both polyethylene and Nylon 66 were successfully decorated on single-walled carbon nanotubes (SWNTs), multiwalled carbon nanotubes (MWNTs), as well as vapor grown carbon nanofibers (CNFs). The formation mechanism was attributed to "size-dependent soft epitaxy". Because NHSK formation conditions depend on CNT structures, it further provides a unique opportunity for CNT separation. The reported method opens a gateway to periodically patterning polymers and different functional groups on individual CNTs in an ordered and controlled manner, an attractive research field that is yet to be explored.