Abstract
In this work Polyynes was synthesized by pulse laser ablation of graphite target in ethanol solution. UV-Visible Spectrophotometer, Fourier Transform Infrared Spectroscopy (FTIR) and Transmission electron microscopy (TEM) were used to study the optical absorption, chemical bonding, particle size and the morphology. UV absorption peaks coincide with the electronic transitions corresponding to linear hydrogen – capped polyyne (Cn+1H2), the absorption peaks intensity increased when the polyynes were produced at different laser energies and the formation rats of polyynes increased with the increasing of laser pulse number. The FTIR absorption peak at 2368.4 cm-1, 1640.0 cm-1 and 1276.8 cm-1 stretching vibration bond, were refer to the C ≡ C, C = C and C-C, respectively. A bond suggests the formation carbon nanoparticles suspend in this solvent and the TEM show the formation of spherical nanoparticles with size ranges from (1.2 to 105.9 nm) and aggregation of the carbon nanoparticles.
Highlights
Increasing interest has been found in the formation mechanism of sp-hybridized linear carbon chain molecules under laser ablation of carbon species [1]
Laser ablation of graphite has been widely employed as an effective tool for the synthesis of carbon clusters and it has brought about the discovery of fullerenes C60
When a graphite target is irradiated in liquid phase, Polyynes, linear carbon chains with alternating triple and single sphybridized C–C bonds terminated by atoms or groups (conventionally polyynes represent the class of molecules H (–C≡C–)m H, with, have attracted considerable interest in astrophysics and nanoscience [4]
Summary
Increasing interest has been found in the formation mechanism of sp-hybridized linear carbon chain molecules under laser ablation of carbon species [1]. The purpose of the present study is to clarify how long chain carbines are produced in the liquid phase by laser ablation of graphite in ethanol solution at 1064 nm and study the effect of laser energy and no.
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