Superviscosity and electroviscous effects at an electrode/aqueous electrolyte interface: an atomic force microscope study

Journal of Colloid and Interface Science
Svetlana GuriyanovaElmar Bonaccurso

Abstract

Several authors observed in the past a larger than twofold increase in viscosity of organic liquids under the influence of an electric field of the order of 10(6) V/m. This was called electro viscous effect (EVE). Significantly higher electric fields, of up to 10(8)-10(9) V/m, arise in the electric double layer in solutions close to an electrode. Therefore, the viscosity can be expected to increase at strongly charged liquid-solid interfaces. In more recent years, it was also observed that even in the absence of an externally controlled electric field the viscosity of water can be up to 10(7) times higher close to a hydrophilic surface than in the bulk ("hydrophilic forces"). Here, we present electrochemical atomic force microscopy (EC-AFM) measurements by which we can overcome the critical threshold of the electric field H=10(6) V/m by the control of the potentials applied to both a conducting sample and a conducting tip immersed in solution. Using the EC-AFM, we have investigated for the first time the EVE in an aqueous electrolyte. We can show that by controlling the applied potential, we can control the viscosity and the thickness of the super viscous liquid layer close to the solid interface. Using this technique, we are f...Continue Reading

References

Apr 5, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Peter J Feibelman
Apr 6, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Matthew P GoertzX-Y Zhu
Jul 14, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Samuel RentschGeorg Papastavrou
Jun 25, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Amanda MusgroveDan Bizzotto
Nov 26, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Guoxin XieChenhui Zhang

❮ Previous
Next ❯

Citations

Jun 9, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Andreas VerchNiels de Jonge
Oct 18, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Volodymyr Kuznetsov, Georg Papastavrou
Apr 22, 2017·Faraday Discussions·Günther KrämerRoland Bennewitz
Oct 5, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Leila PashazanusiNoshir S Pesika
Jul 22, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Hongmei BiKislon Voïtchovsky

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Journal of the American Chemical Society
Zachary D SchultzAndrew A Gewirth
Langmuir : the ACS Journal of Surfaces and Colloids
Matthew P GoertzX-Y Zhu
Langmuir : the ACS Journal of Surfaces and Colloids
Christian SendnerRoland R Netz
The Journal of Chemical Physics
Dhurba RaiRajeev K Pathak
© 2022 Meta ULC. All rights reserved