Evolution of the electrical double layer with electrolyte concentration probed by second harmonic scattering
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388963%3A_____%2F23%3A00574257" target="_blank" >RIV/61388963:_____/23:00574257 - isvavai.cz</a>
Alternative codes found
RIV/60076658:12310/23:43906677
Result on the web
<a href="https://doi.org/10.1039/D3FD00036B" target="_blank" >https://doi.org/10.1039/D3FD00036B</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d3fd00036b" target="_blank" >10.1039/d3fd00036b</a>
Alternative languages
Result language
angličtina
Original language name
Evolution of the electrical double layer with electrolyte concentration probed by second harmonic scattering
Original language description
Investigating the electrical double layer (EDL) structure has been a long-standing challenge and has seen the emergence of several sophisticated techniques able to probe selectively the few molecular layers of a solid/water interface. While a qualitative estimation of the thickness of the EDL can be obtained using simple theoretical models, following experimentally its evolution is not straightforward and can be even more complicated in nano- or microscale systems, particularly when changing the ionic concentration by several orders of magnitude. Here, we bring insight into the structure of the EDL of SiO2 nanoparticle suspensions and its evolution with increasing ionic concentration using angle-resolved second harmonic scattering (AR-SHS). Below millimolar salt concentrations, we can successively characterize inner-sphere adsorption, diffuse layer formation, and outer-sphere adsorption. Moreover, we show for the first time that, by appropriately selecting the nanoparticle size, it is possible to retrieve information also in the millimolar range. There, we observe a decrease in the magnitude of the surface potential corresponding to a compression in the EDL thickness, which agrees with the results of several other electroanalytical and optical techniques. Molecular dynamics simulations suggest that the EDL compression mainly results from the diffuse layer compression rather than outer-sphere ions (Stern plane) moving closer to the surface.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GA22-02972S" target="_blank" >GA22-02972S: Computer modeling of nonlinear optics signals at interfaces</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Faraday Discussions
ISSN
1359-6640
e-ISSN
1364-5498
Volume of the periodical
246
Issue of the periodical within the volume
October
Country of publishing house
GB - UNITED KINGDOM
Number of pages
19
Pages from-to
407-425
UT code for WoS article
001029546700001
EID of the result in the Scopus database
2-s2.0-85166232876