Oxidation and reduction of nanodiamond particles in colloidalsolutions by laser irradiation or radio-frequency plasma treatment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00462553" target="_blank" >RIV/68378271:_____/16:00462553 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21230/16:00302978

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.vibspec.2016.01.010" target="_blank" >http://dx.doi.org/10.1016/j.vibspec.2016.01.010</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.vibspec.2016.01.010" target="_blank" >10.1016/j.vibspec.2016.01.010</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Oxidation and reduction of nanodiamond particles in colloidalsolutions by laser irradiation or radio-frequency plasma treatment

Popis výsledku v původním jazyce

Functionalized nanodiamond particles (NDs) represent carbon nanomaterial with unique properties for various applications. We report on a new approach to surface modification of NDs by their exposure to radio frequency plasma or laser irradiation plasma directly in aqueous solution. By using grazing angle reflectance FTIR spectroscopy and supporting analysis by XPS, zeta-potential, and Kelvin force microscopy we show that surface chemistry of NDs produced by detonation process (DNDs) or high-pressure high-temperature process (HPHT NDs) works in different way. Moieties on as-received NDs are dominated by COOH and C-O-C groups due to wet chemical cleaning procedures. On DNDs, both RF and LA treatment lead to removal of sp2 shell and additional oxidation of the surface to C-O-C groups. On HPHT NDs the RF treatment leads to reduction of C-O-C groups that are transformed into C-OH and C-H moieties. Thus at least partial hydrogenation of colloidal HPHT NDs seems feasible.

Název v anglickém jazyce

Oxidation and reduction of nanodiamond particles in colloidalsolutions by laser irradiation or radio-frequency plasma treatment

Popis výsledku anglicky

Functionalized nanodiamond particles (NDs) represent carbon nanomaterial with unique properties for various applications. We report on a new approach to surface modification of NDs by their exposure to radio frequency plasma or laser irradiation plasma directly in aqueous solution. By using grazing angle reflectance FTIR spectroscopy and supporting analysis by XPS, zeta-potential, and Kelvin force microscopy we show that surface chemistry of NDs produced by detonation process (DNDs) or high-pressure high-temperature process (HPHT NDs) works in different way. Moieties on as-received NDs are dominated by COOH and C-O-C groups due to wet chemical cleaning procedures. On DNDs, both RF and LA treatment lead to removal of sp2 shell and additional oxidation of the surface to C-O-C groups. On HPHT NDs the RF treatment leads to reduction of C-O-C groups that are transformed into C-OH and C-H moieties. Thus at least partial hydrogenation of colloidal HPHT NDs seems feasible.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

—

Projekt

<a href="/cs/project/GA15-01809S" target="_blank" >GA15-01809S: Studium funkcionalizovaných nanočástic diamantu pro konverzi energie</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Vibrational Spectroscopy

ISSN

0924-2031

e-ISSN

—

Svazek periodika

83

Číslo periodika v rámci svazku

Mar

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

108-114

Kód UT WoS článku

000373543600013

EID výsledku v databázi Scopus

2-s2.0-84958231533