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|Title:||Evaporation-Driven Crystallization of Diphenylalanine Microtubes for Microelectronic Applications|
Shur, Vladimir Ya.
Kholkin, Andrei L.
|Keywords:||ASSEMBLED PEPTIDE NANOTUBES|
|Publisher:||AMER CHEMICAL SOC|
|Abstract:||Self-assembly of supramolecular biomaterials such as proteins or peptides has revealed great potential for their use in various applications ranging from scaffolds for cell culture to light-emitting diodes and piezoelectric transducers. Many of these applications require controlled growth,of individual objects in the configuration allowing simple transfer to the desired device. In this work, we grew millimeter-long diphenylalanine (FF) self-assembled microtubes with high aspect ratio via evaporation-driven crystallization of nonsaturated FF solutions, making use of the Marangoni flow in the drying droplets. The growth mechanism was investigated by measuring the microtube length as a function of time. Jerky (steplike) growth behavior was observed and explained by a self-activated process in which additional activation energy is provided through condensation. The calculated growth rate due to the diffusion-controlled process is in agreement with the experimentally measured values. The grown microtubes were successfully transferred to metallized patterned substrates, and their specific conductivity and piezoelectric properties were evaluated as a function of the applied voltage and frequency. A number of piezoelectric resonances were observed and attributed to different vibrational modes excited by the piezoelectric effect inherent to the FF structure.|
|Appears in Collections:||CICECO - Artigos|
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|Evaporation-Driven Crystallization of Diphenylalanine Microtubes for Microelectronic Applications_10.1021acs.cgd.5b01604.pdf||5.12 MB||Adobe PDF|
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