Growth control of peptide-nanotube spherulitic films: Experiments and simulations

Netta Hendler, Elad Mentovich, Bálint Korbuly, Tamás Pusztai, László Gránásy, Shachar Richter

Research output: Contribution to journalArticlepeer-review

Abstract

Multi-hierarchical self-assembly (MHSA) is a key process responsible for the spontaneous formation of many complex structures. However, because of the complexity of the process, the underlying mechanism remains largely unclear. Thus, a deeper understanding of MHSA is required, especially for the preparation of MHSA systems via bottom-up methodologies. We show here, experimentally and theoretically, that the complex-formation MHSA of peptide nanotube films can be controlled solely by manipulating the experimental parameter of humidity. Furthermore, we identify growth-front nucleation (GFN; the formation of new grains at the perimeter) as the physical background for the observed morphological transitions by correlating experimental observations with phase-field modeling of the morphological evolution. Our findings indicate a simple way to control multi-hierarchical morphologies, crucial for the employment of bottom-up techniques in constructing complex structures for practical applications. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)3630-3638
Number of pages9
JournalNano Research
Volume8
Issue number11
DOIs
StatePublished - 16 Sep 2015

Keywords

  • crystallization
  • experiment vs. phase-field modeling
  • growth-front nucleation
  • multi-hierarchical self-assembly
  • peptide nanotubes
  • spherulite

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