Abstract
Combining the unique properties of peptides as versatile tools for nano- and biotechnology with lead halide perovskite nanoparticles can bring exceptional opportunities for the development of optoelectronics, photonics, and bioelectronics. As a first step towards this challenge sub 10 nm methylammonium lead bromide perovskite colloidal nanoparticles have been synthetizes using commercial cyclic peptide Cyclo(RGDFK), containing 5 amino acids, as a surface stabilizer. Perovskite nanoparticles passivated with Cyclo(RGDFK) possess charge transfer from the perovskite core to the peptide shell, resulting in lower photoluminescence quantum yields, which however opens a path for the application where charge transfer is favorable.
Highlights
The incorporation of electronic functionality into biological molecules opens a pathway for bioelectronics nanomaterials
Optical band gap was estimated as 2.3 eV from the Tauc plot (Fig. 2B) considering direct band gap in lead halide perovskites[33]
In the present communication, we demonstrate as first an efficient way of stabilizing the surface of methylammonium lead bromide perovskite nanoparticles with cyclic peptide Cyclo(RGDFK)
Summary
The incorporation of electronic functionality into biological molecules opens a pathway for bioelectronics nanomaterials. Solid-binding peptides have been developed and became ubiquitous molecular building blocks in nanotechnology[6,7,8] These peptides show selectivity and bind with high affinity to the surfaces of a wide range of solid materials including metals, metal oxides and compounds, magnetic materials, semiconductors, polymers, and minerals. The extensive research is devoted on the different applications of self-assembling peptides for the generation of biosensors, as well as functional electrochemical and optoelectronic devices[10,11] These materials are even considered as alternative semiconductor materials because of their bio-friendly nature, morphologically advantageous, and cost effective easy preparation, modification and doping[12]. Cyclic peptide was chosen regarding its higher stability with a respect to the linear counterparts[29]
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