Sol-gel synthesis and third-order optical nonlinearity of Au nanoparticles doped monolithic glass

Abstract

Gold nanoparticles (Au NPs) doped monolithic and transparent sodium borosilicate glass has been synthesized by both sol-gel and atmosphere control heat treatment methods. Fourier transform infrared (FTIR) spectra in the wavenumber range of 400 to 4000 cm −1 were applied to collect variation information of surface groups of the samples in the sintering process. The microstructure of Au NPs in the glass was characterized by means of X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and high-resolution TEM (HRTEM). Meanwhile, the linear optical properties of the glass were analyzed by UV-vis spectrometer between the wavelength of 300 and 1000 nm, and a broad absorption band around 600 nm was observed. The third-order nonlinear optical properties of the glass were investigated by using Z-scan technique at the wavelength of 800 nm, pulse duration of 190 fs, and repetition rate of 20 Hz. The glass showed saturable absorption and self-focusing nonlinear refraction, and the optical nonlinear susceptibility χ (3) was estimated to be 1.7 × 10 −14 esu, with the single-pulse energy of 1 μJ.

Gold Nanomaterials and Bone/Cartilage Tissue Engineering: Biomedical Applications and Molecular Mechanisms

“…Among the numerous materials, Au represents one well-studied type (Xu et al, 2016) with tunable shape (Zhu et al, 2015), structure (Ma et al, 2015), and composition (Jiang et al, 2017). For gold nanomaterials, AuNPs, as well as nanoclusters (AuNCs), nanocages, nanorods (AuNRs), nanobelts, nanoplates and so on, are becoming increasingly popular because of their optical nonlinearities (Gao et al, 2015;Huang et al, 2017;Zhang et al, 2018), local surface plasmon resonance (SPR) (Li Q. et al, 2017) and photothermal effect (Jiang et al, 2012). Considering these characteristics, it has been proved that gold nanomaterials can be used in many fields such as chemistry, biomedicine, including the diagnosis and treatment of diseases (Li et al, 2018b), sensor (Li et al, 2015), catalysis (Li et al, 2013), surface-enhanced Raman spectroscopy (Huang et al, 2019), illumination (Zhang et al, 2017b), detector (Du et al, 2018), and therapy (Yeh et al, 2012).…”

Acousto-Plasmonic Sensing Assisted by Nonlinear Optical Interactions in Bimetallic Au-Pt Nanoparticles

“…Among all metallic NPs, gold NPs (Au NPs) have gained much attention for potential bio-nanotechnology and nanomedicine applications. Au NPs are currently employed in different instrumentation fields due to their NLO behavior [ 9 ], drug delivery potential [ 10 ], and therapeutic effects [ 11 ]. Au NPs are excellent materials in terms of photo-thermal conversion mechanisms and internal health monitoring [ 12 ].…”

Introductory Chapter: Sol-Gel Synthesis

“…Considering these benefits, sol-gel processing is considered as a favourable processing technique for growing nanostructures. The technique is effectively used to grow metal nanoparticles [11], metal oxide nanoparticles [12,13] and non-metallic oxide nanoparticles [14]. In the cases where certain doped elements are believed to induce impurity phases, sol-gel processing is considered very effective.…”