Properties of High-Density Amorphous Carbon Films Deposited by Laser Ablation

Abstract

The properties of carbon films deposited by high intensity pulsed Nd:Glass laser are reported. Different measurements like TEM, SIMS, EELS, XPS and AFM showed the formation of a high-density amorphous carbon layer with good protection against chemically aggressive alkaline solutions. We demonstrated that instead of excimer lasers, Nd-based solid state lasers can be used successfully for preparation of high quality amorphous carbon films.

Divalent Mn in calcium hydroxyapatite by pulse laser deposition

“…The power density of the laser spot was around 3 × 10 7 W/cm 2 , and 1500 laser shoots were applied for ablation to each sample. The parameters and processes of laser ablation method were described elsewhere [20,21]. The laser ablation process was carried out in a stainless steel chamber.…”

Thin Film Carbon Layers with Continously Changing Bonding Properties

“…The PLD was made in 10 -5 Pa vacuum by Nd:glass laser system with pulse parameters of 3J in 40ns at the wavelength of 1054nm with 3x10 9 W/cm 2 power density which is able to form DLC carbon films [5][6][7].The distance between target and substrate was 4 cm, with the ability to move the target up and down and rotate it during the laser ablation process in order to eliminate crater formation on the surface of the target, as it described in our previous work [8].…”

Polymerization of a Confined π‐System: Chemical Synthesis of Tetrahedral Amorphous Carbon Nanoballs from Graphitic Carbon Nanocapsules

“…[1] Most of the synthetic processes require relatively drastic conditions, and the carbon source may be obtained by ionization, [2] ion sputtering, [3] or laser ablation. [4] In a graphitic structure, the 3.4 Å distance between each layer allows significant p-p interactions. [5] As such, a radical species, which can be generated on the surface, may add onto the second graphene layer via a radical chain reaction process leading to carbon-carbon bond formation.…”

“…This architecture leads to the formation of sandwichtype dimers (H-aggregates) in the ground state, and excimers in the excited state, which usually exhibit red-shifted fluorescence and a low PL efficiency. [4] Much work has been done to prevent the aggregation of DSB, involving the tetrahedral linkage of four DSBs, referred to as tetrakis(4-tert-butylstyrylstilbenyl)methane (C( t BuSSB) 4 ), [5] and the covalent assembly of four DSBs arising from a calyx [4]arene core.…”