Modulation of an Induced Charge Density Gradient in the Room-Temperature Ionic Liquid BMIM+BF4-

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10375857" target="_blank" >RIV/00216208:11310/18:10375857 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1021/acs.jpcc.8b02345" target="_blank" >https://doi.org/10.1021/acs.jpcc.8b02345</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.8b02345" target="_blank" >10.1021/acs.jpcc.8b02345</a>

Result language

angličtina

Original language name

Modulation of an Induced Charge Density Gradient in the Room-Temperature Ionic Liquid BMIM+BF4-

Original language description

In an earlier article (Langmuir 2016, 32, 95079512), we reported the existence of an induced charge density gradient, rho(f), in a room-temperature ionic liquid (RTIL, BMIM+BF4-) normal to a charged planar silica surface. In this work, we demonstrate experimental control over the sign and magnitude of the gradient. The spatial extent of rho(f) can exceed 100 pm from the charged surface. We characterized rho(f) through the rotational diffusion time constant gradient of a cationic chromophore in the room-temperature ionic liquid (RTIL). The sign and magnitude of rho(f) in BMIM+BF4- is linked directly to the surface charge density of the electrode, which can be controlled. We used transparent conductive electrodes (FTO and ITO coated on glass) as supports and demonstrated that control over the electrode surface charge carrier density can influence the magnitude and sign of rho(f). There are limitations to this approach based on the FTO and ITO properties, and we demonstrate these limits experimentally.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10406 - Analytical chemistry

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

—

Volume of the periodical

122

Issue of the periodical within the volume

13

Country of publishing house

US - UNITED STATES

Number of pages

7

Pages from-to

7361-7367

UT code for WoS article

000429625600035

EID of the result in the Scopus database

2-s2.0-85045031112