Abstract
This study used the carbon dots solution for the laser ablation technique to fabricate silver nanoparticles. The ablation time range was from 5 min to 20 min. Analytical methods, including Fourier transform infrared spectroscopy (FTIR), UV-visible spectroscopy, transmission electron microscopy, and Raman spectroscopy were used to categorize the prepared samples. The UV-visible and z-scan techniques provided optical parameters such as linear and nonlinear refractive indices in the range of 1.56759 to 1.81288 and 7.3769 × 10−10 cm2 W−1 to 9.5269 × 10−10 cm2 W−1 and the nonlinear susceptibility was measured in the range of 5.46 × 10−8 to 6.97 × 10−8 esu. The thermal effusivity of prepared samples, which were measured using the photoacoustic technique, were in the range of 0.0941 W s1/2 cm−2 K−1 to 0.8491 W s1/2 cm−2 K−1. The interaction of the prepared sample with fluoride was investigated using a Raman spectrometer. Consequently, the intensity of the Raman signal decreased with the increasing concentration of fluoride, and the detection limit is about 0.1 ppm.
Highlights
IntroductionCarbon dots (CD) is a 0-dimension nanoparticle that has a quasi-spherical carbon nanostructure with a particle size less than 10 nm [1] and the carbon atom contains sp bonding in the CD structure [2,3]
Carbon dots (CD) are the new class of nanomaterial
To prepare the fluoride solutions, 1 g of pure fluoride was dissolved in 1000 cc of pure hexane to obtain theAg–NPs/CD
Summary
CD is a 0-dimension nanoparticle that has a quasi-spherical carbon nanostructure with a particle size less than 10 nm [1] and the carbon atom contains sp bonding in the CD structure [2,3]. CD can be used for industry and medicine applications, including bioimage [8], biosensor and sensor [9], photocatalyst application [10], and optoelectronic devices [2] such as solar cell chip. The metal nanoparticles such as silver (Ag–NPs) and gold nanoparticles (Au–NPs) have unique properties. Ag–NPs have the surface plasmon resonance peak at the UV–vis range and the surface-plasmon propagation has a minor loss of optical frequency [13]
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