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Synthesis of molybdenum oxide nanoparticles by nanosecond laser ablation

  • Author(s): Zamora-Romero, N
  • Camacho-Lopez, MA
  • Vilchis-Nestor, AR
  • Castrejon-Sanchez, VH
  • Aguilar, G
  • Camacho-Lopez, S
  • Camacho-Lopez, M
  • et al.
Abstract

Phothermal therapy (PTT) is one of the most promising techniques to treat cancer. Finding the ideal PTT agent nanomaterial has remained a challenge and has brought the interest of several researchers. In this work, we report the synthesis of molybdenum oxide (MoO ) nanoparticles (NPs), which exhibit absorption in the biological optical window ~840 nm, by using the laser ablation of solids in liquids (LASL) technique with nanosecond (ns) pulses. A Nd:YAG laser was used to synthesize the NPs in deionized (DI) water, free of surfactants or additives, which were optically characterized by absorption spectroscopy and TEM-EDX microscopy. Semi spherical NPs with a suitable average size and shape for potential use as PTT agents were obtained by laser ablation and ablation + fragmentation. The calculated band gap is 3.1 eV, which corresponds to MoO . Micro-Raman spectroscopy studies determined that these NPs are composed of amorphous molybdenum oxide hydrates (MoO · xH O). x 3 3 2

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