Toward Bioelectronic Nanomaterials: Photoconductivity in Protein–Porphyrin Hybrids Wrapped around SWCNT
| Main Authors: | Javier López‐Andarias, Sara H. Mejías, Tsuneaki Sakurai, Wakana Matsuda, Shu Seki, Ferran Feixas, Sílvia Osuna, Carmen Atienza, Nazario Martín, Aitziber L. Cortajarena |
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| Format: | Article eJournal |
| Terbitan: |
, 2018
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| Online Access: |
https://zenodo.org/record/1232112 |
Daftar Isi:
- The development of sophisticated ordered functional materials is one of the important challenges in current science. One of the keys to enhance the properties of these materials is the control of the organization and morphology at different scales. This work presents a novel bioinspired methodology to achieve highly ordered donor/acceptor bio‐nanohybrids using a designed repeat protein as scaffold, endowed with photoactive and electron donating porphyrin (P) units, to efficiently wrap around electron accepting single wall carbon nanotubes (SWCNT). A systematic experimental and theoretical study to evaluate the effect of the length of the protein reveals that longer proteins wrap around the SWCNT in a more efficient manner due to the stronger supramolecular interaction existing between the inner concave surface of the protein (namely Trp and His residues) and the convex surface of the (7,6)‐SWCNT. Interestingly, spectroscopy and X‐ray diffraction data further confirm that the so‐called protein‐P–SWCNT donor–acceptor bio‐nanohybrids retain the original protein structure. Finally, the new bio‐nanohybrids show a remarkable enhancement on the photoconductivity values by flash‐photolysis microwave conductivity (FP‐TRMC technique) demonstrating that the major charge carriers of electrons are injected into the SWCNTs and move along the 1D‐structures.
- This work has been supported by the European Commission IRG-246688 Bionanotools (ALC), the Spanish Ministry of Economy and Competitiveness (MINECO) BIO2012-34835 and BIO2016-77367-C2-1-R (ALC) and CTQ2014-520456-R (NM) and the European Research Council ERC-320441-Chirallcarbon (NM), and ERC-2014-CoG-648071-ProNANO (ALC). NM thanks to Community of Madrid Government (Photocarbon project. S2013/MIT-2841). CA thanks to the Ramón y Cajal granted and JL-A thanks to Spanish Ministry of Education for FPU granted. SHM thanks the Basque Government for financial support through a PhD fellowship. F.F. thanks the European Community for MSCA-IF-2014-EF-661160-MetAccembly grant. S.O. thanks the Spanish MINECO CTQ2014-59212-P, Ramón y Cajal contract (RYC-2014-16846), the European Community for CIG project (PCIG14-GA-2013-630978), and the funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (ERC-2015-StG-679001-NetMoDEzyme).