Enhanced Electrical Conductivity in Poly(3-hexylthiophene)/Fluorinated Tetracyanoquinodimethane Nanowires Grown with a Porous Alumina Template
Enhanced Electrical Conductivity in Poly(3-hexylthiophene)/Fluorinated Tetracyanoquinodimethane Nanowires Grown with a Porous Alumina Template
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DOI：
10.1021/la304499k
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发表时间：
2013-06-18
期刊：
影响因子：
3.9
通讯作者：
Wakayama, Yutaka
中科院分区：
文献类型：
--
作者：
Hu, Jianchen;Clark, Kendal W.;Wakayama, Yutaka
我们报道了使用阳极氧化铝（AAO）模板生长的聚（3-己基噻吩）（P3 HT）/2，3，5，6-四氟-7，7，8，8-四氰基醌二甲烷（F4-TCNQ）复合纳米线的电导率的改善。通过四探针扫描隧道显微镜测量的单根纳米线的电导率表明，F4-TCNQ分子通过毛细管力有效地掺杂到P3 HT中。通过将F4-TCNQ浓度从10重量%改变到0.1重量%，电阻率在0.1-10 Ω cm范围内调谐，并且比相应的P3 HT/F4-TNCQ薄膜复合物的电阻率小2-4个数量级。因此，AAO模板辅助合成方法似乎是有效的高化学掺杂和提高分子线的导电性。
We report on improved electrical conductivity in poly(3-hexylthiophene) (P3HT)/2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ) composite nanowires grown using an anodized aluminum oxide (AAO) template. The electrical conductivity of individual nanowire measured by four-probe scanning tunneling microscopy shows that F4-TCNQ molecules are effectively doped into P3HT by capillary force. The resistivity is tuned in the 0.1-10 Omega cm range by changing the F4-TCNQ concentration from 10 to 0.1 wt % and is 2-4 orders of magnitude smaller than that of the corresponding P3HT/F4-TNCQ thin film composites. The AAO template-assisted synthesis approach thus appears to be effective for high chemical doping and for improving the electrical conductivity of the molecular wires.