Faraday Instabilities Leading to Electrochemomechanical Generation of Sub-μA ACupon Application of DC Voltage Across Free Standing Oil-water Interfaces

In this article, we report the generation of alternating current by application of constant and ramping DC voltages across oil-water interfaces. The work reported here can be broadly divided into two parts depending on the shapes of oil-water interfaces i.e. flattened and curved. In the first part, an alternating current of ~100 nA (amplitude)was generated by applying a constant DC voltage of -3V& above across a free standing and flattened oil-water interface.In another part, an alternating current of ~150 nA (amplitude) was generated by applying a ramping up DC voltage starting from -5V to 5V, then again ramping back down to -5V for the free standing and curved interface. The suggested qualitative mechanism that engenders such a phenomenon includes the oil-water interface acting like a membrane. This membrane oscillates due to the electrophoretic movement of ions present in aqueous phase by application of a DC voltage across the interface.This electrophoretic movement of ions across oil-water interfaces causes the Faraday instabilities leading to oscillations of the said interface.This method could also be used to study the stress levels in the interfacial films between two immiscible liquids. It explores more-than-Moore’s paradigm by finding a substitute to a conventional alternator/inverter that generates alternating current upon applying DC voltage input. This work would be of substantial interest to researchers exploring alternatives to conventional AC generators that can be used in liquid environments and in the design of novel integrated circuits that could be used for unconventional computing applications.

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Graphene-bentonite supported free-standing, flexible membrane with switchable wettability for selective oil–water separation

Separation and Purification Technology ◽

10.1016/j.seppur.2021.118569 ◽

2021 ◽

Vol 266 ◽

pp. 118569

Author(s):

Pratik S. Dhumal ◽

Rahul V. Khose ◽

Pravin H. Wadekar ◽

Kshama D. Lokhande ◽

Surajit Some

Keyword(s):

Free Standing ◽

Water Separation ◽

Flexible Membrane ◽

Oil Water Separation ◽

Oil Water

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Dual-mode reconfigurable focusing using the interface of aqueous and dielectric liquids

Lab on a Chip ◽

10.1039/c7lc00759k ◽

2017 ◽

Vol 17 (23) ◽

pp. 4031-4039 ◽

Cited By ~ 2

Author(s):

Wonkyoung Kim ◽

Changho Lee ◽

Chulhong Kim ◽

Dong Sung Kim

Keyword(s):

Dual Mode ◽

Immiscible Liquids ◽

Dielectric Liquids ◽

Reconfigurable Device ◽

Curved Interface

An optofluidic lens serves as a highly reconfigurable device to manipulate light by using a smoothly curved interface between immiscible liquids.

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Dynamic Dilational Properties of Oil–Water Interfacial Films Containing Surface Active Fractions from Crude Oil

Journal of Dispersion Science and Technology ◽

10.1081/dis-120023816 ◽

2003 ◽

Vol 24 (5) ◽

pp. 699-707 ◽

Cited By ~ 12

Author(s):

Taolei Sun ◽

Lu Zhang ◽

Yiyang Wang ◽

Bo Peng ◽

Sui Zhao ◽

...

Keyword(s):

Crude Oil ◽

Surface Active ◽

Oil Water ◽

Interfacial Films

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Faraday instabilities leading to electrochemomechanical generation of sub-μA AC upon application of DC voltage across freestanding oil–water interfaces

AIP Advances ◽

10.1063/5.0009808 ◽

2020 ◽

Vol 10 (5) ◽

pp. 055016

Author(s):

Arindam Kushagra ◽

Akshaya Pandey ◽

Ayanava Giri ◽

Diyasa Bazal ◽

Anup Kumar Pradhan ◽

...

Keyword(s):

Dc Voltage ◽

Oil Water

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Adhesion of red blood cells to charged interfaces between immiscible liquids. A new method

Journal of Cell Science ◽

10.1242/jcs.18.2.227 ◽

1975 ◽

Vol 18 (2) ◽

pp. 227-239

Author(s):

D. Gingell ◽

I. Todd

Keyword(s):

Red Blood Cells ◽

Blood Cells ◽

Physiological Saline ◽

Behenic Acid ◽

Red Cells ◽

Adherent Cells ◽

Immiscible Liquids ◽

Ph Values ◽

Human Red Blood Cells ◽

Oil Water

We have devised a method of making a flat oil/water interface which remains flat on inversion. Cell adhesion to the interface can be observed microscopically. Glutaraldehyde-fixed human red blood cells adhere to the interface between physiological saline and hexadecane containing surface-active behenic acid at pH values below about 7-5. At high pH values, cells are prevented from adhering due to dissociation of the carboxyl groups of behenic acid oriented in the interface. The negative red cells are driven away electrostatically. Adherent and non-adherent cells remain on the aqueous side of the interface and do not appreciably deform it when adherent. Cells are electrostatically attracted to a similar interface containing positively charged octadecyltrimethylammonium ions. Cells also adhere to an interface containing octadecanol, which carries no charge. Underlying both electrostatic repulsion and attraction between red cells and oil/water interfaces is an attractive force which may be of electrodynamic (van der Waals) origin.

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Determination of the Entropy of Ion Transfer between Two Immiscible Liquids Using the Water|Oil|Water Thermocouple

The Journal of Physical Chemistry B ◽

10.1021/jp026797t ◽

2003 ◽

Vol 107 (36) ◽

pp. 9829-9836 ◽

Cited By ~ 15

Author(s):

Toshiyuki Osakai ◽

Hajime Ogawa ◽

Toru Ozeki ◽

Hubert H. Girault

Keyword(s):

Ion Transfer ◽

Immiscible Liquids ◽

Oil Water

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Robust synthesis of free-standing and thickness controllable conjugated microporous polymer nanofilms

Chemical Communications ◽

10.1039/c6cc09763d ◽

2017 ◽

Vol 53 (12) ◽

pp. 1989-1992 ◽

Cited By ~ 16

Author(s):

Zhen Chen ◽

Min Chen ◽

Yanlei Yu ◽

Limin Wu

Keyword(s):

Schiff Base ◽

Free Standing ◽

Conjugated Microporous Polymer ◽

Microporous Polymer ◽

Oil Water ◽

Robust Synthesis

A new polymerization strategy based on Sonogashira–Hagihara reaction and Schiff-base reaction at oil–water interfaces is developed to synthesize free-standing and thickness controllable conjugated microporous polymer (CMP) nanofilms.

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Corrosion Engineering in Device Packaging

MRS Proceedings ◽

10.1557/proc-203-87 ◽

1990 ◽

Vol 203 ◽

Cited By ~ 1

Author(s):

R.M. Latanision ◽

P.V. Nagarkar ◽

M. Kloppers ◽

F. Bellucci

Keyword(s):

Integrated Circuits ◽

Photoelectron Spectroscopy ◽

Electronic Devices ◽

Complete Understanding ◽

Free Standing ◽

Metallic Substrates ◽

Transport Of Ions ◽

Considerable Degradation ◽

Ionic Contaminants ◽

Pi System

ABSTRACTCorrosion processes affecting electronic devices are chemical and electrochemical in nature. Ionic contaminants, applied voltages, and relative humidity accelerate failure of integrated circuits. Although packaging materials often reduce the corrosion rate of the underlying circuitry, a complete understanding of the mechanism for the basic processes taking place at the coating/metallic circuitry interface is missing.In this paper the role played by water and ionic contaminants on coated metallic substrates is considered. Transport properties of free standing polyimide membranes have been examined. The corrosion behavior of polyimide/Fe and polyimide/Al systems has been investigated using electrochemical polarization, and a.c. impedance measurements. For the AI/PI system underfilm degradation has been examined using x-ray photoelectron spectroscopy (XPS). Results indicate that the flux of ions is very small compared to that of oxygen and water and yet metallic failure can be ascribed mainly to the transport of ions across the packaging material. XPS showed that considerable degradation takes place at the metal/polyimide interface prior to visible corrosion or delamination.

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