Nanostructured interfaces between photosynthetic bacterial Reaction Center and Silicon electrodes
- PDF / 617,922 Bytes
- 8 Pages / 432 x 648 pts Page_size
- 110 Downloads / 229 Views
MRS Advances © 2019 Materials Research Society DOI: 10.1557/adv.2019.246
Nanostructured interfaces between photosynthetic bacterial Reaction Center and Silicon electrodes Marco Lo Presti1, Danilo Vona1, Gabriella Leone1,2, Giorgio Rizzo1, Roberta Ragni1, Stefania R. Cicco3, Francesco Milano4, Fabio Palumbo5, Massimo Trotta6*, Gianluca M. Farinola1* *Corresponding Authors: [email protected]; [email protected]
1
Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Via Orabona 4 70126, Bari Italy
2
Centro di nanoscienza e tecnologia IIT-CNST, via Pascoli 70 20133, Milan Italy
3 Dipartimento di Chimica, Consiglio Nazionale delle Ricerche-Instituto di Chimica dei Composti OrganoMetallici (CNR-ICCOM), Via Orabona 4 70126, Bari, Italy
4 CNR-ISPA, Institute of Sciences of Food Production, Lecce Unit, Via Prov.le Monteroni, 73100 Lecce, Italy
5
Istituto per Metodologie Organiche e Plasmi (IMIP)-CNR, Via Amendola 122/d-o 70126, Bari, Italy
6
Istituto per i processi Chimico-FIsici (IPCF), CNR, Via Orabona 4, 70126, Bari, Italy
ABSTRACT:
Optimizing interfaces between photosynthetic natural photoconverters, like photosynthetic bacterial Reaction Centers (RCs) and electrode surfaces represents a challenge in the progress of bio-optoelectronic devices. The features of the surfaces may result detrimental for the tertiary and quaternary structures of the RC, even resulting in the denaturation of the enzyme. Functional surfaces possessing both confinement capability and conductive features able to preserve the conformation of the biomolecule and its bioelectronic behaviours are highly needed. In this work, the RC is adsorbed on diatomaceous silica and plasma treated hydrophobic silicon based materials. Both the materials are demonstrated to be able to
1741
Downloaded from https://www.cambridge.org/core. The Librarian-Seeley Historical Library, on 13 Jan 2020 at 03:40:00, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1557/adv.2019.246
preserve and enhance the RC photoconverting activity. In particular, we evaluate the functioning of isolated bacterial RC interacting with flat pSi electrode through two nanotextured interfaces designed to address the RC: a thin conductive silicon film nanotextured in pillars via plasma treatment, and a cast film of nanostructured dielectric biosilica obtained from diatomaceous earth. The characterization of these interfaces, together with the RC photocurrent production measurements, pave the way to new generation RC based bio-devices for photocurrent investigation.
INTRODUCTION: Bionanocomposites, among other biohybrid systems, exhibit features suitable for several applications including biosensors, integrated (opto)electronic switches, photoconverters and systems for molecular imaging. [1-3] Biohybrid devices can be based on different classes of materials, including small molecules for organic electronics, [4-6] organic polyconjugated semiconductors [7-10] or biological and biomimetic
Data Loading...
