Orienting periodic organic-inorganic nanoscale domains through one-step electrodeposition.
Orienting periodic organic-inorganic nanoscale domains through one-step electrodeposition.
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DOI：
10.1021/nn102697r
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发表时间：
2011-01-25
期刊：
影响因子：
17.1
通讯作者：
Stupp SI
中科院分区：
文献类型：
--
作者：
Herman DJ;Goldberger JE;Chao S;Martin DT;Stupp SI
在合成具有纳米级结构的杂化材料中的挑战之一是跨长度尺度精确控制形态。使用一步电沉积工艺在氧化铟锡（ITO）衬底上，然后退火，我们在这里报告的材料与优先取向的层状结构域的电子给体表面活性剂和半导体ZnO的制备。我们发现，无论是增加表面活性剂的浓度或水与二甲基亚砜的比例的解决方案，导致在抑制bloom样的形貌和提高ITO基板上的周期性域的密度。此外，通过用导电聚合物共混物聚（3，4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）修饰ITO基板的表面，我们能够改变这些电沉积层状域的取向，使其垂直于基板。通过二维掠入射小角X射线散射表征实现的长程取向。具有交替纳米级p型和n型畴的电子活性混合物中的这种高度取向在光伏或热电材料中具有潜在的兴趣。
One of the challenges in the synthesis of hybrid materials with nanoscale structure is to precisely control morphology across length scales. Using a one-step electrodeposition process on indium tin oxide (ITO) substrates followed by annealing, we report here the preparation of materials with preferentially oriented lamellar domains of electron donor surfactants and the semiconductor ZnO. We found that either increasing the concentration of surfactant or the water to dimethyl sulfoxide ratio of solutions used resulted in the suppression of bloom-like morphologies and enhanced the density of periodic domains on ITO substrates. Furthermore, by modifying the surface of the ITO substrate with the conductive polymer blend poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate), we were able to alter the orientation of these electrodeposited lamellar domains to be perpendicular to the substrate. The long-range orientation achieved was characterized by 2D grazing incidence small angle X-ray scattering. This high degree of orientation in electronically active hybrids with alternating nanoscale p-type and n-type domains is of potential interest in photovoltaics or thermoelectric materials.
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影响因子：
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