Formation of Semiconducting Supramolecular Fullerene Aggregates in a Dipeptide Organogel,Advanced Materials Technologies

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Formation of Semiconducting Supramolecular Fullerene Aggregates in a Dipeptide Organogel
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-01-23 , DOI: 10.1002/admt.201900829
Priyadarshi Chakraborty ₁ , Wei Ji ₁ , Stav Rahmany ₂ , Lioz Etgar ₂ , Ehud Gazit _{1,

3}

Affiliation

The formation of nanostructured fullerene aggregate inside supramolecular gels is a topic of great interest because of the potential applications of these nanostructures in photoelectronics. Gel phase facilitates the aggregation of fullerene by restricting the movement of solvent molecules, thereby increasing the local fullerene concentration. Herein, the supramolecular nanostructure formation of fullerene (C₆₀) in a minimalistic dipeptide (diphenylalanine, FF) organogel is reported. The resulting composite FF/Fullerene gels exhibit improved mechanical properties and semiconductivity. While fullerene nanostructures do not disturb the FF aggregation pattern, they adhere to the FF fibers via non‐covalent interaction. Morphological analysis reveals the presence of spherical clusters and nanorods of fullerene attached to the dipeptide fibers. The composite gel with highest fullerene concentration exhibits linear current–voltage response with a current magnitude of ≈0.3 nA. Moreover, poly(3,4‐ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) is incorporated in the FF/Fullerene system yielding tri‐hybrid donor–acceptor gels which exhibit photoresponsive conductivity. Therefore, the FF/Fullerene and the tri‐hybrid gel have interesting properties, and holds significant promise toward photoelectronic device applications.

中文翻译：

二肽有机凝胶中半导体超分子富勒烯聚集体的形成。

超分子凝胶内部纳米结构富勒烯聚集体的形成是一个非常受关注的话题，因为这些纳米结构在光电学中的潜在应用。凝胶相通过限制溶剂分子的移动来促进富勒烯的聚集，从而增加局部富勒烯的浓度。这里，富勒烯的超分子纳米结构的形成（C ₆₀报道了一种极简的二肽（diphenylalanine，FF）有机凝胶。所得复合FF /富勒烯凝胶表现出改善的机械性能和半导电性。尽管富勒烯纳米结构不会干扰FF的聚集模式，但它们会通过非共价相互作用粘附在FF纤维上。形态分析揭示了球形簇和富勒烯纳米棒附着在二肽纤维上的存在。富勒烯浓度最高的复合凝胶表现出线性电流-电压响应，电流幅值约为0.3 nA。此外，在FF /富勒烯体系中掺入了聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT：PSS），产生了具有光响应性的三杂型供体-受体凝胶。因此，FF /富勒烯和三杂交凝胶具有有趣的特性，

更新日期：2020-03-09

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