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首页> 外文期刊>Nanotechnology >Direct measurement of charge transport through helical poly(ethyl propiolate)nanorods wired into gaps in single walled carbon nanotubes
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Direct measurement of charge transport through helical poly(ethyl propiolate)nanorods wired into gaps in single walled carbon nanotubes

机译：通过连接到单壁碳纳米管间隙中的螺旋聚丙酸乙酯纳米颗粒直接测量电荷传输

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摘要

We report the direct measurement of electrical transport through rod-like polymer molecules, of poly(ethyl propiolate) (PEP), utilizing single walled carbon nanotubes (SWNTs) as electrodes. The electrical properties of the devices were measured (i) before cutting a SWNT, (ii) when a SWNT was cut and (iii) after PEP deposition into the nanoscale gap in a cut SWNT. The gate-dependent electrical properties showed a reduction in current from I_(on) = 2.4 x 10~(-7) A for SWNT devices to I_(on)_ = 3.6 x 10~(-9) A for PEP bridge devices, both with the ON/OFF ratio of 10~4. Similarly, metallic SWNT devices showed a reduction in current from a few hundreds of μA for a SWNT device to a few nA for a PEP_SWNT structure. The current density of a single PEP molecule is 105-106 A cm-2, which is relatively high, indicating that the PEP molecule can carry significant current. Use of SWNT electrodes was seen to be an effective method of contacting PEP nanorods to facilitate electrical measurements.
机译：我们报告直接测量通过棒状聚合物分子，聚丙酸乙酯（PEP），利用单壁碳纳米管（SWNTs）作为电极的电传输。在（i）切割SWNT之前，（ii）切割SWNT时和（iii）将PEP沉积到切割的SWNT中的纳米级间隙中之后，测量器件的电性能。与门相关的电性能显示电流从SWNT器件的I_（on）= 2.4 x 10〜（-7）A降低到PEP桥器件的I_（on）_ = 3.6 x 10〜（-9）A，两者的开/关比为10〜4。同样，金属SWNT器件的电流也从SWNT器件的几百μA降低到PEP_SWNT结构的几nA。一个PEP分子的电流密度为105-106 A cm-2，这相对较高，表明PEP分子可以携带大量电流。 SWNT电极的使用被认为是接触PEP纳米棒以促进电学测量的有效方法。

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