Investigation of carbon plasma species emission at relatively high KrF laser fluences in nitrogen ambient

CN emission spectroscopy study of carbon plasma in nitrogen environment

“…[16]. From a distance of 2 mm until 5 mm, C 2 emission appears at time comparable to the CN one, which indicates that C 2 molecules come from the target surface and/or from clusters dissociation [10]. In Fig.…”

“…CN velocity is then comparable to the atomic velocities. Therefore, we can deduce for these distances that CN molecules formation comes from chemical reactions between atomic carbon plasma species and atomic nitrogen gas [10]. The atomic nitrogen species is formed by the dissociation and the ionisation of gas molecules by collisions in the plasma front.…”

“…Some works on laser induced carbon plasma under nitrogen gas were performed in order to study the spatio-temporal evolution of the ablated species and the formation mechanism of molecular species such as C 2 and CN [7][8][9][10]. The results depend strongly on experimental parameters and the phenomena remain not completely understood.…”

Microstructure and mechanical properties of a-CN films prepared by bias voltage assisted PLD with carbon nitride target

“…Accordingly, we can conclude that the use of carbon nitride target is beneficial to the formation of highly nitrogencontained CN x films. Due to its relatively low density and heat of evaporation compared to graphite target, the carbon nitride target brings brighter and larger size plumes during the ablation and yields a higher concentration of the species (e.g., C + , C 2 + , CN, CN + , C 2 N 2 , N + , N 2 + ) [34][35][36], which provoke more collisions among them.…”

The origin of the metal enrichment of carbon nanostructures produced by laser ablation of a carbon–nickel target

“…The presence of the C 2 band is accompanied by a weak ionised argon line at 422.8 nm and neutral nickel emission at 589.3 nm. The observed enhancement of C 2 emission in the presence of a background gas has been attributed to a recombination of carbon atoms and ions, or dissociation of clusters [36]. In the case of the mixed plume, the intensity of the neutral nickel line at 589.3 nm could indicate collisions between such clusters and the tail-end of the nickel distribution.…”