Homoepitaxial {100} single crystal boron-doped diamond: nanostructuring and its impact on electrochemical performance

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00619245" target="_blank" >RIV/68378271:_____/25:00619245 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/25:10509616 RIV/26722445:_____/25:N0000055

Výsledek na webu

<a href="https://doi.org/10.1016/j.surfin.2025.106499" target="_blank" >https://doi.org/10.1016/j.surfin.2025.106499</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.surfin.2025.106499" target="_blank" >10.1016/j.surfin.2025.106499</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Homoepitaxial {100} single crystal boron-doped diamond: nanostructuring and its impact on electrochemical performance

Popis výsledku v původním jazyce

Homoepitaxially grown single crystal boron-doped diamond (BDD) electrodes with {100} surface were nanostructured using dip-coated silica nanospheres (400 nm in diameter) as a template for microwave plasma-enhanced chemical vapour deposition. Co-doping of BDD with Si atoms was confirmed as a result of SiO2 etching during the deposition process. Electrochemical properties of the nanostructured electrodes with hemispherical cavities were thoroughly investigated using cyclic voltammetry and electrochemical impedance spectroscopy, and were compared with smooth {100} BDD surfaces. Heterogeneous electron transfer kinetics rates for the [Fe(CN)6]3−/4− redox marker were notably higher than literature-reported values for {100} BDD and were further increased up to two orders of magnitude by the nanostructuring. Similar increase in the electron transfer rate was observed for dopamine. Such enhancement can be caused by exposure of more reactive surfaces with other crystallographic orientations due to nanostructuring. Further, surface area analysis revealed the electroactive surface increase factor up to 2.44 upon nanostructuring, exceeding the theoretical estimate of 1.91 derived from geometrical considerations. This discrepancy may indicate nanoscale roughness of the surface of the hemispherical cavities’ walls. Overall, the results demonstrate that the applied nanostructuring approach preserves the sp³ carbon character of the material while improving its electrochemical properties. These findings uncover the potential of nanostructured BDD surfaces for applications in electrochemical sensors, spatially distributed surface modification, and particle entrapment.

Název v anglickém jazyce

Homoepitaxial {100} single crystal boron-doped diamond: nanostructuring and its impact on electrochemical performance

Popis výsledku anglicky

Homoepitaxially grown single crystal boron-doped diamond (BDD) electrodes with {100} surface were nanostructured using dip-coated silica nanospheres (400 nm in diameter) as a template for microwave plasma-enhanced chemical vapour deposition. Co-doping of BDD with Si atoms was confirmed as a result of SiO2 etching during the deposition process. Electrochemical properties of the nanostructured electrodes with hemispherical cavities were thoroughly investigated using cyclic voltammetry and electrochemical impedance spectroscopy, and were compared with smooth {100} BDD surfaces. Heterogeneous electron transfer kinetics rates for the [Fe(CN)6]3−/4− redox marker were notably higher than literature-reported values for {100} BDD and were further increased up to two orders of magnitude by the nanostructuring. Similar increase in the electron transfer rate was observed for dopamine. Such enhancement can be caused by exposure of more reactive surfaces with other crystallographic orientations due to nanostructuring. Further, surface area analysis revealed the electroactive surface increase factor up to 2.44 upon nanostructuring, exceeding the theoretical estimate of 1.91 derived from geometrical considerations. This discrepancy may indicate nanoscale roughness of the surface of the hemispherical cavities’ walls. Overall, the results demonstrate that the applied nanostructuring approach preserves the sp³ carbon character of the material while improving its electrochemical properties. These findings uncover the potential of nanostructured BDD surfaces for applications in electrochemical sensors, spatially distributed surface modification, and particle entrapment.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Surfaces and Interfaces

ISSN

2468-0230

e-ISSN

2468-0230

Svazek periodika

65

Číslo periodika v rámci svazku

May

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

106499

Kód UT WoS článku

001483013500001

EID výsledku v databázi Scopus

2-s2.0-105003583880