Structure and mechanism of the formation of core-shell nanoparticles obtained through a one-step gas-phase synthesis by electron beam evaporation

Andrey V Nomoev; Sergey P Bardakhanov; Makoto Schreiber; Dashima G Bazarova; Nikolai A Romanov; Boris B Baldanov; Bair R Radnaev; Viacheslav V Syzrantsev

doi:10.3762/bjnano.6.89

Structure and mechanism of the formation of core-shell nanoparticles obtained through a one-step gas-phase synthesis by electron beam evaporation

Beilstein J Nanotechnol. 2015 Mar 31:6:874-80. doi: 10.3762/bjnano.6.89. eCollection 2015.

Authors

Andrey V Nomoev¹, Sergey P Bardakhanov², Makoto Schreiber³, Dashima G Bazarova³, Nikolai A Romanov³, Boris B Baldanov³, Bair R Radnaev³, Viacheslav V Syzrantsev⁴

Affiliations

¹ Department of Physics and Engineering, Buryat State University, Smolina street 24a, Ulan-Ude, 670000, Russia ; Institute of Physical Materials Science, Siberian Branch of the Russian Academy of Sciences, Sakhyanova str. 6, Ulan-Ude, 670047, Russia.
² Department of Physics and Engineering, Buryat State University, Smolina street 24a, Ulan-Ude, 670000, Russia ; Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences, Institutskaya str. 4/1, Novosibirsk, 630090, Russia ; Department of Physics, Novosibirsk State University, Pirogova street 2, Novosibirsk, 630090, Russia.
³ Department of Physics and Engineering, Buryat State University, Smolina street 24a, Ulan-Ude, 670000, Russia.
⁴ Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences, Institutskaya str. 4/1, Novosibirsk, 630090, Russia.

Abstract

The structure of core-shell Cu@silica and Ag@Si nanoparticles obtained in one-step through evaporation of elemental precursors by a high-powered electron beam are investigated. The structure of the core and shell of the particles are investigated in order to elucidate their mechanisms of formation and factors affecting the synthesis. It is proposed that the formation of Cu@silica particles is mainly driven by surface tension differences between Cu and Si while the formation of Ag@Si particles is mainly driven by differences in the vapour concentration of the two components.

Keywords: core–shell; electron beam evaporation; gas phase; mechanism of formation; one-step.