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Amorphous silica-based nanotubes (SBNTs) were synthesized from phosphoryl triamide, OP(NH2)3, thiophosphoryl triamide, SP(NH2)3, and silicon tetrachloride, SiCl4, at different temperatures and with varying amount of the starting material SiCl4 using a recently developed template-free synthesis approach. Diameter and length of the SBNTs are tunable by varying the synthesis parameters. The 3D mesocrystals...
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