Publications by authors named "Erika Kawaguchi"
Herein, nanocomposites made of Ni nanoparticles distributed in an amorphous silicon nitride (Ni/a-SiN) matrix, on the one hand, and within an amorphous silicon dioxide (Ni/a-SiO) matrix, on the other hand, were synthesized from the same Ni-modified polysilazane precursor. In both compounds, the Ni/Si atomic ratio (0.06-0.
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- The study explores how nickel (Ni) nanocrystallites are formed during the creation of amorphous silicon nitride at low temperatures (400 °C), using perhydropolysilazane (PHPS) and nickel chloride (NiCl) as key materials.
- Nickel chloride acts as a catalyst to initiate reactions that combine silicon and nitrogen components in PHPS, ultimately creating a nanocomposite by forming silylamino groups and coordinating them with Ni(II) ions.
- During pyrolysis, a nucleophilic reaction forms Ni-N bonds, leading to Ni nanocrystallite growth below 300 °C, which is enhanced by hydrogen-rich conditions resulting from the prior reactions, culminating in a strong SiN