Synthesis of composite Si-B nanoparticles by the laser-induced pyrolysis method

Abstract

In this work the synthesis and physical properties of composite Si-B nanoparticles are described. Boron-silicon-containing nanoparticles were obtained with the laser-induced pyrolysis of a silane and boron trichloride mixture under cw CO 2 -laser irradiation. The particles are heterogeneous in their composition structure: particles consisting of both the crystalline and amorphous phases. The size of the crystalline silicon phase depends on the gas flows' ratio and at the equal point P(SiH 4 ):P(BCl 3 ) = 1:1 the crystalline core has almost disappeared. The possible pyrolysis reaction mechanism was proposed on the basis of the FTIR and TEM data.

Experimental synthesis, functionalized modifications and potential applications of monoelemental zero-dimensional boron nanomaterials

“…As a result, specic nanomaterials are acquired by the corresponding reaction processes. [121][122][123][124][125] Singh et al synthesized BNPs via subatmospheric laser-induced pyrolysis with a continuous 80 W CO 2 laser. 96 A stream of 5% diborane in ultrahigh-purity H 2 and sulfur hexauoride (at a ratio of 6 : 1) were rst mixed, and then entered the reactor.…”

Boron Vehiculating Nanosystems for Neutron Capture Therapy in Cancer Treatment

“…Silica nanoparticles (SiNPs) are frequently selected for biomedical applications due to their low toxicity and easy workup in a wide range of sizes and morphologies. In particular, their potential use as boron carriers for BNCT has been investigated by several research groups [ 146 , 147 , 148 , 149 ]. A common issue arising from the development of elemental boron NPs might be the irregular shape and the broad size distribution of the boron NPs obtained from commercial boron powders through milling techniques [ 150 ], and this limitation can be overcome by encapsulating boron NPs into a silica shell.…”

Stability of normal modes of a polyatomic molecule under laser-induced modification of its geometry

“…A number of effects of interaction of laser radiation with polyatomic molecules have been recently studied, both experimantally and theoretically. For instance, one can mention laser-driven synthesis of chemical products [1,2], laser control of molecular electron motion [3,4], control of optical properties of a gas of coherently spinning molecules [5][6][7][8], laser-induced pyrolysis of a monosilane and boron trichloride [9], x-ray generation under interaction of femtosecond laser pulses with clusters of polyatomic molecules [10], SF − 6 anion observation [11,12] and F − (NF 3 ) n double detachment [13].…”