Preparation of gold nanoparticles using monoolein cubic phase as a template

초록

MO cubic phase containing gold nanoparticle (GNP) was prepared by hydrating MO melt with gold ion solution to synthesize GNP of different sizes and shapes. A TEM microscopy and an elemental mapping analysis disclosed that GNP could be formed within the cubic phase. GNP prepared in an aqueous solution (GNP(W)) exhibited its surface plasmon resonance (SPR) spectrum in the visible light region with the peak around 528 nm and it was a sphere of which diameter was 10-30 nm. Besides a SPR spectrum in the visible light region, GNP formed in the cubic phase (GNP(CP)) showed its SPR spectrum spanning from the far-red to the near-infrared region, indicating GNP(CP) was gold particles of different sizes and shapes. In fact, non-spherical particles, including tetrahedron, decahedron, and rod, were found on the TEM photo of GNP(CP) and were larger than GNP(W). Furthermore, GNP(CP) exhibited the inherent lattice constant of gold, confirmed by a high-resolution TEM microscopy and an X-ray diffraction spectroscopy, indicating that various gold particles of different sizes and shapes could be formed in the cubic phase, maintaining its intrinsic crystalline structure. (c) 2023 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

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