Designable and dynamic single-walled stiff nanotubes assembled from sequence-defined peptoids

Haibao Jin, Yan-Huai Ding, Mingming Wang, Yang Song, Zhihao Liao, Christina J. Newcomb, Xuepeng Wu, Xian-Qiong Tang, Zheng Li, Yuehe Lin, Feng Yan, Tengyue Jian, Peng Mu and Chun-Long Chen ()
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Haibao Jin: Physical Sciences Division, Pacific Northwest National Laboratory
Yan-Huai Ding: Physical Sciences Division, Pacific Northwest National Laboratory
Mingming Wang: Physical Sciences Division, Pacific Northwest National Laboratory
Yang Song: Physical Sciences Division, Pacific Northwest National Laboratory
Zhihao Liao: Physical Sciences Division, Pacific Northwest National Laboratory
Christina J. Newcomb: Physical Sciences Division, Pacific Northwest National Laboratory
Xuepeng Wu: Physical Sciences Division, Pacific Northwest National Laboratory
Xian-Qiong Tang: Institute of Rheological Mechanics, Xiangtan University
Zheng Li: Institute of Rheological Mechanics, Xiangtan University
Yuehe Lin: School of Mechanical and Materials Engineering, Washington State University
Feng Yan: Physical Sciences Division, Pacific Northwest National Laboratory
Tengyue Jian: Physical Sciences Division, Pacific Northwest National Laboratory
Peng Mu: Physical Sciences Division, Pacific Northwest National Laboratory
Chun-Long Chen: Physical Sciences Division, Pacific Northwest National Laboratory

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

Abstract: Abstract Despite recent advances in the assembly of organic nanotubes, conferral of sequence-defined engineering and dynamic response characteristics to the tubules remains a challenge. Here we report a new family of highly designable and dynamic nanotubes assembled from sequence-defined peptoids through a unique “rolling-up and closure of nanosheet” mechanism. During the assembly process, amorphous spherical particles of amphiphilic peptoid oligomers crystallize to form well-defined nanosheets before folding to form single-walled nanotubes. These nanotubes undergo a pH-triggered, reversible contraction–expansion motion. By varying the number of hydrophobic residues of peptoids, we demonstrate tuning of nanotube wall thickness, diameter, and mechanical properties. Atomic force microscopy-based mechanical measurements show peptoid nanotubes are highly stiff (Young’s Modulus ~13–17 GPa). We further demonstrate the precise incorporation of functional groups within nanotubes and their applications in water decontamination and cellular adhesion and uptake. These nanotubes provide a robust platform for developing biomimetic materials tailored to specific applications.

Date: 2018
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DOI: 10.1038/s41467-017-02059-1

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