Tunable morphology from 2D to 3D in the formation of hierarchical architectures from a self-assembling dipeptide: thermal-induced morphological transition to 1D nanostructures
Tunable morphology from 2D to 3D in the formation of hierarchical architectures from a self-assembling dipeptide: thermal-induced morphological transition to 1D nanostructures
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DOI：
10.1007/s10853-015-8875-6
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发表时间：
2015-02
影响因子：
4.5
通讯作者：
Pradyot Koley;M. Sakurai;M. Aono
中科院分区：
文献类型：
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作者：
Pradyot Koley;M. Sakurai;M. Aono
通过多肽分子的分层自组装构建复杂的三维（3D）结构，由于其在生物纳米技术中的各种潜在应用，已成为制造多功能先进材料的一种有吸引力的方法。本文描述了一种简单的自组装二肽苯丙氨酸-酪氨酸，通过一滴肽溶液施加一定范围的电压，以一种简单的制备方法，可调节形成复杂形态的花朵状三维分层结构。电压和施加时间的微调可以使微结构从二维到三维的形态变化，并控制其形成。形貌的特点是随着外加电压的变化，微结构的高径比逐渐变化。此外，这些微观结构在较宽的温度范围内表现出显著的热稳定性，而适当的高温则促进微观结构的形态转变为不同类型的超薄一维纳米结构，如纳米线、纳米原纤维等。此外，我们提出了一种可能的增长模型，用于通过扩散限制聚合机制制造独特的分层结构。
Construction of complex three-dimensional (3D) architectures through hierarchical self-assembly of peptide molecules has become an attractive approach of fabricating multifunctional advanced materials due to their various potential applications in bionanotechnology. This paper describes the tunable formation of flower-like 3D hierarchical architectures of intricate morphology from a simple self-assembling dipeptide phenylalanine–tyrosine with a facile preparative method by applying a range of voltages through a drop of peptide solution. The fine-tuning of voltages and their application time enable to produce morphological changes of the microstructures from 2D to 3D and also control their formation. The morphology has been characterized by the gradual change in the height-to-diameter ratio of the microstructures with change in the applied voltages. Moreover, these microstructures show significant thermal stability over a wide range of temperatures, whereas adequately high temperature promotes the morphological transformation of the microstructures into different types of ultrathin 1D nanostructures such as nanowires, nanofibrils, etc. Furthermore, we have suggested a possible growth model for the fabrication of unique hierarchical architectures through diffusion-limited aggregation mechanism.