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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

—

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

—

Svazek periodika

122

Číslo periodika v rámci svazku

13

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

7361-7367

Kód UT WoS článku

000429625600035

EID výsledku v databázi Scopus

2-s2.0-85045031112