View source for Oxhydroelectric effect

The '''oxhydroelectric effect''' consists in the generation of [[voltage]] and [[electric current]] in pure liquid [[water]], without any electrolyte, upon exposure to [[electromagnetic radiation]] in the infrared range, after creating a physical (not chemical) asymmetry in liquid water e.g. thanks to a strongly [[Hydrophilic|hydrophile]] polymer, such as [[Nafion]].<ref name="articoloGer2012">
{{cite journal 
| last1 = Germano
|last2 = Tontodonato
|last3 = Hison
|last4 = Cirillo
|last5 = Tuccinardi
| title =  Oxhydroelectric Effect: Electricity from Water by Twin Electrodes
| journal =  Key Engineering Materials
|volume =  495
|pages = 100-103
| date = 2012
}}
</ref><ref name="articoloGer">
{{cite journal 
|last1= V. Elia
|first1= R. Germano
|last2= C. Hison
|first2= E. Del Giudice
|date= 2013
|title= Oxhydroelectric Effect in bi-distilled water 
|url= https://doi.org/10.4028/www.scientific.net/KEM.543.455 
|journal= Key Engineering Materials 
|volume= 543 
|pages= 455–459 
|doi= 10.4028/www.scientific.net/KEM.543.455 
|s2cid= 94391774
}}
</ref><ref name="brevetto">
{{cite patent
| country	= Italy
| number	= ITRM20120223A1
| status	= 
| title		= Procedure and apparatus for the extraction of electricity from water
| pubdate	= 2013-11-18
| gdate		= 2012-05-17
| fdate		= 
| pridate	= 
| inventor	= 
| invent1	= Vittorio Elia 
| invent2	= Roberto Germano 
| assign1	= 
| assign2	= 
| class		= 
| url		= https://worldwide.espacenet.com/patent/search/family/046508400/publication/ITRM20120223A1?q=pn%3DITRM20120223A1
}}
</ref> 

Since the publication of the first seminal research, other independent research has been published, which refer to this effect, in scientific peer reviewed, reputable journals (with [[Impact factor | impact factors]] higher than the median in the respective fields).<ref >
{{cite journal
|first1 = Mae-Wan 
|last1 = Ho
|title = Illuminating Water and Life
|journal = Entropy
|volume = 16
|pages =  4874-4891 
| date = 2014
}}
</ref><ref >
{{cite journal
|last1 = Musumeci
| last2 = Pollack
|title = High electrical permittivity of ultrapure water at the water–platinum interface
|journal = Chemical Physics Letters
| volume =  613
| pages = 19–23
|date = 2014
}}
</ref><ref >
{{cite journal
|last1 = Jiang
|last2 =  Liu
|last3 =  Amos Yinnon
|last4 = Kong
|title = Effects of Interfaces on Dynamics in Micro-Fluidic Devices: Slip-Boundaries’ Impact on Rotation Characteristics of Polar Liquid Film Motors
| journal = Commun. Theor. Phys.
|volume = 67
| pages = 577 - 589
|date = 2017
}}
</ref><ref >

{{cite journal
| last1 =Jerman
|last2 =  Ogrizek
| last3 = Periček Krapež
|last4 =  Jan
|title = Physicochemical Study of the Molecular Signal Transfer of Ultra-High Diluted Antibodies to Interferon-Gamma
|journal = International Journal of Molecular Sciences
| volume = 24
| pages = 11961 
| date = 2023
}}
</ref><ref >
{{cite journal
| last1 = Madl
|last2 = Renati
| title = Quantum Electrodynamics Coherence and Hormesis: Foundations of Quantum Biology
|journal = International Journal of Molecular Sciences
| volume = 24
| pages = 14003
|date = 2023
}}
</ref>

The system can be described as a [[Solar cell|photovoltaic cell]] operating in the infrared electromagnetic range, based on liquid water instead of a [[semiconductor]].

== Theoretical model ==
The model proposed by Roberto Germano and his collaborators, who have first observed the effect <ref name="articoloGer2012" /><ref name="articoloGer" /><ref name="brevetto" /> is based on the known concept of the [[Exclusion zone (physics)|exclusion zone]].
The first observations of a different behaviour of water molecules close to the walls of its container date back to late ‘60s and early ‘70s, when Drost-Hansen, upon reviewing many experimental articles, came to the conclusion that interfacial water shows structural difference with respect to the bulk liquid water.<ref name="Drost1">
{{cite journal
|author= W. Drost-Hansen
|title= Structure of Water Near Solid Interfaces
|date= 1969
|journal= Ind. Eng. Chem.
|volume= 61
|issue= 11
|pages= 10–47
|doi= 10.1021/ie50719a005
|url= http://dx.doi.org/10.1021/ie50719a005
}}</ref><ref name="Drost2">
{{cite journal
|author= W. Drost-Hansen
|title= Phase transitions in biological systems: Manifestations of cooperative processes in vicinal water.
|journal= Ann. N. Y. Acad. Sci.
|date= 1973 
|volume= 204
|issue= 1
|pages= 100–112
|doi= 10.1111/j.1749-6632.1973.tb30773.x
|pmid= 4513148
|bibcode= 1973NYASA.204..100D
|s2cid= 35243683
|url= http://dx.doi.org/10.1111/j.1749-6632.1973.tb30773.x
}}</ref> 

In 2006 Gerald Pollack published a seminal work on the exclusion zone <ref name="artPoll">
{{cite journal 
|last1= G.H. Pollack
|last2= E. Khijniak
|first1= J.M. Zheng
|first2=  W.C. Chin
|date= 2006
|title= Surfaces and interfacial water: Evidence that hydrophilic surfaces have long-range impact
|url= https://doi.org/10.1016/j.cis.2006.07.002
|journal= Advances in Colloid and Interface Science
|volume= 127 
|issue= 1
|pages= 19–27
|doi= 10.1016/j.cis.2006.07.002
|pmid= 16952332
|access-date=
}}</ref> and those observations were subsequently reported by several other groups,<ref name="artChen">
{{cite journal 
|last1= C.M. Wu
|first1= C.S. Chen
|last2=  W.C. Chin
|first2= Chung, W.-J
|date= 2011
|title= Force field measurements within the exclusion zone of water
|url= https://doi.org/10.1007/s10867-011-9237-5
|journal= Journal of Biological Physics
|volume= 38
|issue= 1
|pages= 113–120
|doi= 10.1007/s10867-011-9237-5
|pmid= 23277674
|pmc= 3285724
|access-date=
}}
</ref><ref name="artHuszar">
{{cite journal 
|last1= Iván, K.
|first1= Huszár, I.
|last2= Kellermayer, M.
|first2= Mártonfalvi, Z.
|date= 2014
|title=  Exclusion-Zone Dynamics Explored with Microfluidics and Optical Tweezers
|journal= Entropy
|volume= 16
|issue= 8
|pages= 4322–4337
|doi= 10.3390/e16084322
|bibcode= 2014Entrp..16.4322H
|doi-access= free
}} </ref> in which a hydrophilic material creates a [[Coherence (physics)|coherent]] water region at the boundary between its surface and the water.

Further elaborating on the work of Pollack, the model describes liquid water as a system made of two phases: a matrix of non-coherent water molecules hosting many “Coherence Domains” (CDs), about 0.1&nbsp;um in size, found in the exclusion zone, but also in the bulk volume.
In this model the behaviour of the coherence domains is also considered as the cause for the formation of xerosydryle.

The two phases, are characterized by different thermodynamic parameters, and are in a stable non-equilibrium state.

The coherent phase should be described by a [[quantum state]], and in particular a state oscillating between a fundamental state, where electrons are firmly bound (ionization energy of 12.60 eV), and an excited state characterized by a quasi-free electron configuration. The energy of the excited state is 12.06 eV, which means that only a small amount of energy as small as (12.60 - 12.06) eV = 0.54 eV (Infrared range) is sufficient to extract an electron.

Then, at a fixed temperature and for molecules density exceeding a threshold, the transition of the non-coherent water molecules to the coherence state is spontaneous because it is driving the system to a lower energy configuration. 
More exactly, the almost free electrons have to cross an energy barrier of (0.54 - Χ) eV, where Χ ~ 0.1 eV is the electric potential difference at the CD boundary with the non-coherent water. 
This small amount of energy, ~ 0.44 eV, necessary for the electron extraction, makes the coherent water a reservoir of quasi-free electrons that can be easily released by Infrared stimulation, or quantum tunnel effect or by small external perturbation.

The two water phases, with their different potentials behave as the two components of a photovoltaic cell  based on semiconductors.
Then, in the cell described in the patent,<ref name="brevetto" /> one of the two sectors has sheets of hydrophilic material, which create (more) coherent domains in that sector, with respect to the other sector.

==Notes==
{{Reflist}}


[[Category:Water]]
[[Category:Electricity]]
[[Category:Surface science]]