Zobrazeno 1 - 10
of 65
pro vyhledávání: '"D J Lougnot"'
Publikováno v:
Microelectronic Engineering. 46:69-72
We describe a new approach of mold-assisted lithography based on photopolymerization under near-field regime. In addition to a numerical analysis, we also present the mold fabrication and the replication of sub-100 nm features. The molds were fabrica
Publikováno v:
The Journal of Physical Chemistry B. 102:7714-7720
Evolutive dissipative structures were observed during UV irradiation of the surface of acrylate films leading to photopolymerization. Self-organization results in the formation of hexagonal or square cells, waves, stars, and spots. These different si
Publikováno v:
Measurement Science and Technology. 9:58-66
The crosslinking gradients in a photopolymer material with a curved surface can be determined using acoustic techniques. The reflection coefficient at the liquid/material interface measured by low-frequency microechography is related to the mechanica
Publikováno v:
Measurement Science and Technology. 8:997-1000
The degree of swelling of a polymer hydrogel depends on the aqueous solution in which it is immersed, among other factors. When a volume phase hologram is engraved in a hydrogel film, the dependence of its diffraction efficiency on osmosis in saline
Publikováno v:
Journal of Colloid and Interface Science. 192:149-155
UV irradiation through a lined mask of acrylate-based self-developing materials leads to the formation of a relief in the irradiated areas. Investigation of the effect of various properties, through a known two-layer model, showed the paramount impor
Publikováno v:
Pure and Applied Optics: Journal of the European Optical Society Part A. 6:225-245
The diffusion mechanism for hologram formation in multicomponent polymerizable systems undergoing photocrosslinking was examined. The nonlinear diffusion equation was solved to predict the behaviour of the recording system. The results show the cruci
Autor:
D.-J. Lougnot, L. Lavielle
Publikováno v:
Journal of Photochemistry and Photobiology A: Chemistry. 102:245-251
Space and time instabilities can appear as very general phenomena at the surface of liquid or viscous films submitted to constraints. In the case of dry photopolymerized acrylate films, the surface relief at the monomer-polymer interface is examined
Autor:
C Croutxé-Barghorn, D J Lougnot
Publikováno v:
Pure and Applied Optics: Journal of the European Optical Society Part A. 5:811-825
A new technique based on the imaging of systems in which a dry photopolymer layer is capable of memorizing optical information as a local change in thickness was developed. The generation of a relief structure takes place under the sole action of lig
Publikováno v:
Pure and Applied Optics: Journal of the European Optical Society Part A. 4:529-542
Microechography was used to characterize crosslinking gradients in photopolymers, because this technique can produce acoustic images of amplitude variations of local mechanical properties. A frequency of 25 MHz was chosen due to the high absorption o
Autor:
D. J. Lougnot, L. Simonin, D. Bonvallot, C. Garel, C. Ley, C. Carre, C. Turck, C. Croutxé, C. Belin
Publikováno v:
Annales de Physique. 20:717-726