Electrosurface properties of single-crystalline detonation nanodiamond particles obtained by air annealing of their agglomerates


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Abstract

A complex study of electrosurface properties has been performed for single-crystalline detonation nanodiamond particles with sizes of 4–5 nm obtained by air annealing of their agglomerates. FTIR spectroscopy and X-ray photoelectron spectroscopy data indicate that the investigated properties result from the presence of two types of ionogenic functional groups on the particle surface, i.e., acidic carboxyl and amphoteric hydroxyl groups. Acid-base potentiometric titration, laser Doppler electrophoresis, and conductometry have been employed to measure the ΓH+(pH) and ΓOH-(pH) adsorption isotherms of potential-determining ions, as well as the pH dependences (in a pH range of 3.5–10.5) of the surface charge density, electrophoretic mobility, and specific surface conductivity of detonation nanodiamond particles in aqueous 0.0001–0.01 M KCl solutions.

About the authors

A. V. Shvidchenko

Ioffe Physical Technical Institute

Author for correspondence.
Email: AlexShvidchenko@mail.ru
Russian Federation, Politekhnicheskaya ul. 26, St. Petersburg, 194021

A. N. Zhukov

St. Petersburg State University

Email: AlexShvidchenko@mail.ru
Russian Federation, Universitetskaya nab. 7/9, St. Petersburg, 199034

A. T. Dideikin

Ioffe Physical Technical Institute

Email: AlexShvidchenko@mail.ru
Russian Federation, Politekhnicheskaya ul. 26, St. Petersburg, 194021

M. V. Baidakova

Ioffe Physical Technical Institute

Email: AlexShvidchenko@mail.ru
Russian Federation, Politekhnicheskaya ul. 26, St. Petersburg, 194021

M. S. Shestakov

Ioffe Physical Technical Institute

Email: AlexShvidchenko@mail.ru
Russian Federation, Politekhnicheskaya ul. 26, St. Petersburg, 194021

V. V. Shnitov

Ioffe Physical Technical Institute

Email: AlexShvidchenko@mail.ru
Russian Federation, Politekhnicheskaya ul. 26, St. Petersburg, 194021

A. Ya. Vul’

Ioffe Physical Technical Institute

Email: AlexShvidchenko@mail.ru
Russian Federation, Politekhnicheskaya ul. 26, St. Petersburg, 194021

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