Deposition of Polyethylene Thin Films Using Synchrotron Radiation Ablation

Abstract

A large set of calculations has been carried out providing a basis for diagnostics of fusion plasmas through emission resulting from radiative de-excitation following charge transfer between hydrogen and highly charged argon ions, so-called argon charge exchange recombination spectroscopy. These results have been obtained using the classical trajectory Monte Carlo (CTMC) method to treat charge transfer to states with principal quantum numbers up to 30 or more. Nine collision energies between 13.3333 and 250 keV/u pertinent to neutral beam injection have been considered for Ar q+ (q = 15-18) colliding with atomic hydrogen in both the ground and metastable states. Atomic orbital close coupling calculations have also been undertaken in order to provide a fully quantum mechanical test of the CTMC results for Ar 18+ + H(1s) collisions. The results of the calculations are discussed here and the full set of data is made available through a web posting.

Transfer by direct photo etching of poly(vinylidene flouride) using X-rays

“…5) show the evolution of H (2 amu), F (19 amu), and HF (20 amu) species, in accordance with previous studies [10], [11], [15]. The data also reveal that HF molecules are produced more readily than F. The appearance of HF was delayed by a few seconds at the beginning of irradiation, and it continued for more than ten seconds after the X-ray beam was turned off.…”

“…In situ mass spectroscopy revealed the evolution of H, H , and HF under UV and excimer laser irradiation, while under the ion beam irradiation, in addition to H and HF, the emanation of F was detected. In a recent work [15] on the effect of soft X rays from a compact synchrotron light source on PVDF, the mass spectroscopy results showed a predominant evolution of HF species. The residual film formed in the irradiated region exhibited higher electrical conductivity and lower solubility compared to pristine samples.…”

Crystallization of Poly(ethylene)s with Regular Phosphoester Defects Studied at the Air–Water Interface

“…However, Langmuir or LB film formation of poly(ethylene) (PE) was not successful and crystallization studies were not reported. Some thin film studies have been done using medium-density PE [ 32 , 33 ]. The issue regarding PE Langmuir/LB film formation is the lack of polar groups in the repeating unit.…”

Langmuir–Blodgett films of polyethylene

“…Because of excellent dielectric and tribologic properties, PE thin films have many current and potential applications. Methods of PE thin film preparation include molding, solution casting 2 or dipping, 3 direct 4 or ionization-assisted 5 thermal evaporation in vacuum, synchrotron radiation ablation, 6 and radiofrequency magnetron sputtering. 7 In most reported thin film work, films were 100-1000 nm thick.…”