scholarly journals From Microorganism-Based Amperometric Biosensors Towards Microbial Fuel Cells

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2442
Author(s):  
Eivydas Andriukonis ◽  
Raimonda Celiesiute-Germaniene ◽  
Simonas Ramanavicius ◽  
Roman Viter ◽  
Arunas Ramanavicius
Keyword(s):  
Charge Transfer ◽  
Conducting Polymers ◽  
Microbial Fuel Cells ◽  
Biofuel Cells ◽  
Biofuel Cell ◽  
Transfer Efficiency ◽  
Amperometric Biosensors ◽  
Immobilization Of Enzymes ◽  
Critical Issues ◽  
Microbial Biofuel

This review focuses on the overview of microbial amperometric biosensors and microbial biofuel cells (MFC) and shows how very similar principles are applied for the design of both types of these bioelectronics-based devices. Most microorganism-based amperometric biosensors show poor specificity, but this drawback can be exploited in the design of microbial biofuel cells because this enables them to consume wider range of chemical fuels. The efficiency of the charge transfer is among the most challenging and critical issues during the development of any kind of biofuel cell. In most cases, particular redox mediators and nanomaterials are applied for the facilitation of charge transfer from applied biomaterials towards biofuel cell electrodes. Some improvements in charge transfer efficiency can be achieved by the application of conducting polymers (CPs), which can be used for the immobilization of enzymes and in some particular cases even for the facilitation of charge transfer. In this review, charge transfer pathways and mechanisms, which are suitable for the design of biosensors and in biofuel cells, are discussed. Modification methods of the cell-wall/membrane by conducting polymers in order to enhance charge transfer efficiency of microorganisms, which can be potentially applied in the design of microbial biofuel cells, are outlined. The biocompatibility-related aspects of conducting polymers with microorganisms are summarized.

scholarly journals Charge Transfer and Biocompatibility Aspects in Conducting Polymer-Based Enzymatic Biosensors and Biofuel Cells

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 371 ◽  
Author(s):  
Simonas Ramanavicius ◽  
Arunas Ramanavicius
Keyword(s):  
Electron Transfer ◽  
Charge Transfer ◽  
Conducting Polymers ◽  
Direct Electron Transfer ◽  
Biofuel Cells ◽  
Redox Enzymes ◽  
Immobilization Of Enzymes ◽  
Via Holes ◽  
Enzymatic Biosensors ◽  
Significant Attention

Charge transfer (CT) is a very important issue in the design of biosensors and biofuel cells. Some nanomaterials can be applied to facilitate the CT in these bioelectronics-based devices. In this review, we overview some CT mechanisms and/or pathways that are the most frequently established between redox enzymes and electrodes. Facilitation of indirect CT by the application of some nanomaterials is frequently applied in electrochemical enzymatic biosensors and biofuel cells. More sophisticated and still rather rarely observed is direct charge transfer (DCT), which is often addressed as direct electron transfer (DET), therefore, DCT/DET is also targeted and discussed in this review. The application of conducting polymers (CPs) for the immobilization of enzymes and facilitation of charge transfer during the design of biosensors and biofuel cells are overviewed. Significant attention is paid to various ways of synthesis and application of conducting polymers such as polyaniline, polypyrrole, polythiophene poly(3,4-ethylenedioxythiophene). Some DCT/DET mechanisms in CP-based sensors and biosensors are discussed, taking into account that not only charge transfer via electrons, but also charge transfer via holes can play a crucial role in the design of bioelectronics-based devices. Biocompatibility aspects of CPs, which provides important advantages essential for implantable bioelectronics, are discussed.

scholarly journals Evaluation of a Yeast–Polypyrrole Biocomposite Used in Microbial Fuel Cells

Sensors ◽  
2022 ◽  
Vol 22 (1) ◽  
pp. 327
Author(s):  
Antanas Zinovicius ◽  
Juste Rozene ◽  
Timas Merkelis ◽  
Ingrida Bruzaite ◽  
Arunas Ramanavicius ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Microbial Fuel Cells ◽  
Living Cells ◽  
Open Circuit ◽  
Biofuel Cells ◽  
Yeast Cells ◽  
Replication Process ◽  
Electrically Conductive ◽  
Incremental Increase

Electrically conductive polymers are promising materials for charge transfer from living cells to the anodes of electrochemical biosensors and biofuel cells. The modification of living cells by polypyrrole (PPy) causes shortened cell lifespan, burdens the replication process, and diminishes renewability in the long term. In this paper, the viability and morphology non-modified, inactivated, and PPy-modified yeasts were evaluated. The results displayed a reduction in cell size, an incremental increase in roughness parameters, and the formation of small structural clusters of polymers on the yeast cells with the increase in the pyrrole concentration used for modification. Yeast modified with the lowest pyrrole concentration showed minimal change; thus, a microbial fuel cell (MFC) was designed using yeast modified by a solution containing 0.05 M pyrrole and compared with the characteristics of an MFC based on non-modified yeast. The maximal generated power of the modified system was 47.12 mW/m2, which is 8.32 mW/m2 higher than that of the system based on non-modified yeast. The open-circuit potentials of the non-modified and PPy-modified yeast-based cells were 335 mV and 390 mV, respectively. Even though applying a PPy layer to yeast increases the charge-transfer efficiency towards the electrode, the damage done to the cells due to modification with a higher concentration of PPy diminishes the amount of charge transferred, as the current density drops by 846 μA/cm2. This decrease suggests that modification by PPy may have a cytotoxic effect that greatly hinders the metabolic activity of yeast.

Towards microbial biofuel cells: Improvement of charge transfer by self-modification of microoganisms with conducting polymer – Polypyrrole

2019 ◽  
Vol 356 ◽  
pp. 1014-1021 ◽  
Author(s):  
Aura Kisieliute ◽  
Anton Popov ◽  
Roxana-Mihaela Apetrei ◽  
Geta Cârâc ◽  
Inga Morkvenaite-Vilkonciene ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Conducting Polymer ◽  
Biofuel Cells ◽  
Microbial Biofuel

Charge transfer efficiency in proton damaged CCD's

1998 ◽  
Vol 45 (2) ◽  
pp. 154-163 ◽  
Author(s):  
T. Hardy ◽  
R. Murowinski ◽  
M.J. Deen
Keyword(s):  
Charge Transfer ◽  
Transfer Efficiency

Amorphous Co(OH)2 nanocages achieving efficient photo-induced charge transfer for significant SERS activity

2022 ◽  
Author(s):  
Jian Yu ◽  
CHEN CHAO ◽  
Jie Lin ◽  
Xiangyu Meng ◽  
Lin Qiu ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Raman Scattering ◽  
Vibronic Coupling ◽  
Substrate Molecule ◽  
Surface Enhanced ◽  
Critical Issues ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Induced Charge ◽  
Molecule Interactions

Boosting substrate-molecule interactions, especially the strong vibronic coupling and efficient photo-induced charge transfer (PICT) transitions, are critical issues to improve surface-enhanced Raman scattering (SERS) sensitivity of non-metal substrates. Here, by...

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