Quantum confined peptide assemblies with tunable visible to near-infrared spectral range

Kai Tao, Zhen Fan, Leming Sun, Pandeeswar Makam, Zhen Tian, Mark Ruegsegger, Shira Shaham-Niv, Derek Hansford, Ruth Aizen, Zui Pan, Scott Galster, Jianjie Ma, Fan Yuan, Mingsu Si, Songnan Qu, Mingjun Zhang (), Ehud Gazit () and Junbai Li ()
Additional contact information
Kai Tao: Tel Aviv University
Zhen Fan: The Ohio State University
Leming Sun: Northwestern Polytechnical University
Pandeeswar Makam: Tel Aviv University
Zhen Tian: Chinese Academy of Sciences
Mark Ruegsegger: The Ohio State University
Shira Shaham-Niv: Tel Aviv University
Derek Hansford: The Ohio State University
Ruth Aizen: Tel Aviv University
Zui Pan: University of Texas at Arlington
Scott Galster: Rockefeller Neuroscience Institute and Department of Neuroscience, WVU School of Medicine
Jianjie Ma: The Ohio State University Wexner Medical Center
Fan Yuan: Duke University
Mingsu Si: Lanzhou University
Songnan Qu: Chinese Academy of Sciences
Mingjun Zhang: The Ohio State University
Ehud Gazit: Tel Aviv University
Junbai Li: Chinese Academy of Sciences

Nature Communications, 2018, vol. 9, issue 1, 1-11

Abstract: Abstract Quantum confined materials have been extensively studied for photoluminescent applications. Due to intrinsic limitations of low biocompatibility and challenging modulation, the utilization of conventional inorganic quantum confined photoluminescent materials in bio-imaging and bio-machine interface faces critical restrictions. Here, we present aromatic cyclo-dipeptides that dimerize into quantum dots, which serve as building blocks to further self-assemble into quantum confined supramolecular structures with diverse morphologies and photoluminescence properties. Especially, the emission can be tuned from the visible region to the near-infrared region (420 nm to 820 nm) by modulating the self-assembly process. Moreover, no obvious cytotoxic effect is observed for these nanostructures, and their utilization for in vivo imaging and as phosphors for light-emitting diodes is demonstrated. The data reveal that the morphologies and optical properties of the aromatic cyclo-dipeptide self-assemblies can be tuned, making them potential candidates for supramolecular quantum confined materials providing biocompatible alternatives for broad biomedical and opto-electric applications.

Date: 2018
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DOI: 10.1038/s41467-018-05568-9

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