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Building Supramolecular DNA‐Inspired Nanowires on Gold Surfaces: From 2D to 3D
Author(s) -
Gatto Emanuela,
Kubitzky Sascha,
Schriever Marc,
Cesaroni Simona,
Mazzuca Claudia,
Marafon Giulia,
Venanzi Mariano,
De Zotti Marta
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201901683
Subject(s) - nanowire , supramolecular chemistry , nanotechnology , dna , materials science , crystallography , chemistry , biology , genetics , crystal structure
Three building blocks have been designed to chemically link to a gold surface and vertically self‐assemble through thymine–adenine hydrogen bonds. Starting from these building blocks, two different films were engineered on gold surface. Film 1 consists of adenine linked to lipoic acid (Lipo–A) to covalently bind to the gold surface, and ZnTPP linked to a thymine (T–ZnTPP). Film 2 has an additional noncovalently linked layer: a helical undecapeptide analogue of the trichogin GA IV peptide, in which four glycines were replaced by four lysines to favor a helical conformation and reduce flexibility and the two extremities were functionalized with thymine and adenine to enable Lipo–A and T–ZnTPP binding, respectively. These films were characterized by electrochemical and spectroscopic techniques, and were very stable over time and when in contact with solution. Under illumination, they could generate current with higher efficiency than similar previously described systems.