Peptide-Controlled Assembly of Macroscopic Calcium Oxalate Nanosheets

Hao Lu; Arne Schäfer; Helmut Lutz; Steven J. Roeters; Ingo Lieberwirth; Rafael Muñoz-Espí; Matthew A. Hood; Mischa Bonn; Tobias Weidner

doi:10.1021/acs.jpclett.9b00684

Peptide-Controlled Assembly of Macroscopic Calcium Oxalate Nanosheets

Hao Lu^*, Arne Schäfer, Helmut Lutz, Steven J. Roeters, Ingo Lieberwirth, Rafael Muñoz-Espí, Matthew A. Hood, Mischa Bonn, Tobias Weidner

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

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Abstract

The fabrication of two-dimensional (2D) biomineral nanosheets is of high interest owing to their promise for applications in electronics, filtration, catalysis, and chemical sensing. Using a facile approach inspired by biomineralization in nature, we fabricate laterally macroscopic calcium oxalate nanosheets using β-folded peptides. The template peptides are composed of repetitive glutamic acid and leucine amino acids, self-organized at the air-water interface. Surface-specific sum frequency generation spectroscopy and molecular dynamics simulations reveal that the formation of oxalate nanosheets relies on the peptide-Ca ²⁺ ion interaction at the interface, which not only restructures the peptides but also templates Ca ²⁺ ions into a calcium oxalate dihydrate lattice. Combined, this enables the formation of a critical structural intermediate in the assembly pathway toward the oxalate sheet formation. These insights into peptide-ion interfacial interaction are important for designing novel inorganic 2D materials.

Original language	English
Journal	Journal of Physical Chemistry Letters
Volume	10
Issue	9
Pages (from-to)	2170-2174
Number of pages	5
ISSN	1948-7185
DOIs	https://doi.org/10.1021/acs.jpclett.9b00684
Publication status	Published - 2019

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Peptide-Controlled Assembly of Macroscopic Calcium Oxalate NanosheetsFinal published version, 3.81 MBLicence: CC BY

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title = "Peptide-Controlled Assembly of Macroscopic Calcium Oxalate Nanosheets",

abstract = " The fabrication of two-dimensional (2D) biomineral nanosheets is of high interest owing to their promise for applications in electronics, filtration, catalysis, and chemical sensing. Using a facile approach inspired by biomineralization in nature, we fabricate laterally macroscopic calcium oxalate nanosheets using β-folded peptides. The template peptides are composed of repetitive glutamic acid and leucine amino acids, self-organized at the air-water interface. Surface-specific sum frequency generation spectroscopy and molecular dynamics simulations reveal that the formation of oxalate nanosheets relies on the peptide-Ca 2+ ion interaction at the interface, which not only restructures the peptides but also templates Ca 2+ ions into a calcium oxalate dihydrate lattice. Combined, this enables the formation of a critical structural intermediate in the assembly pathway toward the oxalate sheet formation. These insights into peptide-ion interfacial interaction are important for designing novel inorganic 2D materials. ",

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AU - Lu, Hao

AU - Schäfer, Arne

AU - Lutz, Helmut

AU - Roeters, Steven J.

AU - Lieberwirth, Ingo

AU - Muñoz-Espí, Rafael

AU - Hood, Matthew A.

AU - Bonn, Mischa

AU - Weidner, Tobias

PY - 2019

Y1 - 2019

N2 - The fabrication of two-dimensional (2D) biomineral nanosheets is of high interest owing to their promise for applications in electronics, filtration, catalysis, and chemical sensing. Using a facile approach inspired by biomineralization in nature, we fabricate laterally macroscopic calcium oxalate nanosheets using β-folded peptides. The template peptides are composed of repetitive glutamic acid and leucine amino acids, self-organized at the air-water interface. Surface-specific sum frequency generation spectroscopy and molecular dynamics simulations reveal that the formation of oxalate nanosheets relies on the peptide-Ca 2+ ion interaction at the interface, which not only restructures the peptides but also templates Ca 2+ ions into a calcium oxalate dihydrate lattice. Combined, this enables the formation of a critical structural intermediate in the assembly pathway toward the oxalate sheet formation. These insights into peptide-ion interfacial interaction are important for designing novel inorganic 2D materials.

AB - The fabrication of two-dimensional (2D) biomineral nanosheets is of high interest owing to their promise for applications in electronics, filtration, catalysis, and chemical sensing. Using a facile approach inspired by biomineralization in nature, we fabricate laterally macroscopic calcium oxalate nanosheets using β-folded peptides. The template peptides are composed of repetitive glutamic acid and leucine amino acids, self-organized at the air-water interface. Surface-specific sum frequency generation spectroscopy and molecular dynamics simulations reveal that the formation of oxalate nanosheets relies on the peptide-Ca 2+ ion interaction at the interface, which not only restructures the peptides but also templates Ca 2+ ions into a calcium oxalate dihydrate lattice. Combined, this enables the formation of a critical structural intermediate in the assembly pathway toward the oxalate sheet formation. These insights into peptide-ion interfacial interaction are important for designing novel inorganic 2D materials.

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Peptide-Controlled Assembly of Macroscopic Calcium Oxalate Nanosheets

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