Tailoring Metal/TiO2 Interface to Influence Motion of Light-Activated Janus Micromotors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F20%3A43920466" target="_blank" >RIV/60461373:22310/20:43920466 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/20:PU136407

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.201908614" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.201908614</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/adfm.201908614" target="_blank" >10.1002/adfm.201908614</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tailoring Metal/TiO2 Interface to Influence Motion of Light-Activated Janus Micromotors

Popis výsledku v původním jazyce

Catalytic light-powered micromotors have become a major focus in current autonomous self-propelled micromotors research. The attractiveness of such machines stems from the fact that these motors are “fuel-free,” with their motion modulated by light irradiation. In order to study how different metals affect the velocities of metal/TiO2 micromachines in the presence of UV irradiation in pure water, Pt/TiO2, Cu/TiO2, Fe/TiO2, Ag/TiO2, and Au/TiO2 Janus micromotors are prepared. The metals have different chemical potentials and catalytic effects toward water splitting reaction, with both the effects expected to alter the photoelectrochemically-induced reaction and propulsion rates. Analysis of structures, elemental compositions, motion patterns, velocities, and overall performances of different metals (Pt, Au, Ag, Fe, Cu) on TiO2 are observed by scanning electron microscopy, energy dispersive X-ray spectroscopy, and optical microscopy. Electrochemical Tafel analysis is performed for the different metal/TiO2 structures and it is concluded that the effective velocity is a result of the synergistic effect of chemical potential and catalysis. It is found that the Pt/TiO2 Janus micromotors exhibit the fastest motion compared to the rest of the prepared materials. Furthermore, after exposure to UV light, every fabricated micromotor shows high possibility of forming assembled chains which influence their velocity. © 2020 WILEY-VCH Verlag GmbH &amp; Co. KGaA, Weinheim

Název v anglickém jazyce

Tailoring Metal/TiO2 Interface to Influence Motion of Light-Activated Janus Micromotors

Popis výsledku anglicky

Catalytic light-powered micromotors have become a major focus in current autonomous self-propelled micromotors research. The attractiveness of such machines stems from the fact that these motors are “fuel-free,” with their motion modulated by light irradiation. In order to study how different metals affect the velocities of metal/TiO2 micromachines in the presence of UV irradiation in pure water, Pt/TiO2, Cu/TiO2, Fe/TiO2, Ag/TiO2, and Au/TiO2 Janus micromotors are prepared. The metals have different chemical potentials and catalytic effects toward water splitting reaction, with both the effects expected to alter the photoelectrochemically-induced reaction and propulsion rates. Analysis of structures, elemental compositions, motion patterns, velocities, and overall performances of different metals (Pt, Au, Ag, Fe, Cu) on TiO2 are observed by scanning electron microscopy, energy dispersive X-ray spectroscopy, and optical microscopy. Electrochemical Tafel analysis is performed for the different metal/TiO2 structures and it is concluded that the effective velocity is a result of the synergistic effect of chemical potential and catalysis. It is found that the Pt/TiO2 Janus micromotors exhibit the fastest motion compared to the rest of the prepared materials. Furthermore, after exposure to UV light, every fabricated micromotor shows high possibility of forming assembled chains which influence their velocity. © 2020 WILEY-VCH Verlag GmbH &amp; Co. KGaA, Weinheim

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

—

Návaznosti

O - Projekt operacniho programu

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Advanced Functional Materials

ISSN

1616-301X

e-ISSN

—

Svazek periodika

30

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

—

Kód UT WoS článku

000506092100001

EID výsledku v databázi Scopus

2-s2.0-85077841801