عنوان

Tridimensional Surface Relief Modulation of Polymeric Films.

شابک

9533070595

شابک

9789533070599

شماره

b610676

عنوان اصلي

Tridimensional Surface Relief Modulation of Polymeric Films.

نام عام مواد

[Book]

نام نخستين پديدآور

I Apostol

نام ناشر، پخش کننده و غيره

INTECH Open Access Publisher

تاریخ نشرو بخش و غیره

2010

متن يادداشت

Two classes of polymeric films were analyzed from the point of view of the capability to induce single step surface relief modulation in the form of SRGs under the action of a UV interference field having as a light source pulsed laser radiation at 193 nm or 355 nm wavelength: photoresists and azopolymers. The incident laser fluence was lower than the ablation threshold of the material and the transversal profile of the induced structures has a continuous shape, without phase changes. There were obtained SRGs with a pitch of 250 nm and 1 µm, depending on the irradiation set-up. The modulation depth was between 10 nm and 800 nm, depending on the incident fluence/intensity and the number of subsequent incident pulses. The surface relief modulation time is of the order of laser pulse duration (5 -7 ns). There were obtained surface relief gratings with sinusoidal profile on photoresist films. The obtained surface relief gratings had very good time stability from the point of view of the pitch and modulation depth. In case of the azopolymers the time stability of the SRG depends on the specific composition. For azopolysiloxane modified with azophenol (95-98) % the surface induced gratings begins to decay after 1-2 hours from the irradiation moment up to a complete loss of the structuration after 24 hour. A stable structure was obtained on the surface of films of azo-polyimide and azo-polysiloxane modified with thymine films. The surface structuration was monitored 3 month after irradiation and a good contrast of the surface relief structuration was observed. In case of azopolymers the single step surface relief modulation under the action of a light field is considered to be the consequences of the photo-induced conformational changes in the molecular chain. More generally the property of a polymeric material to have different configurations as a function of external stimuli (laser light in this case) offers the possibility to obtain surface relief structures in functional surface coatings with applications in biophysics, pharmaceutics, electronics and optoelectronics.

موضوع مستند نشده

Open Access Collection.

شماره رده

نشانه اثر

مستند نام اشخاص تاييد نشده

I Apostol

مستند نام اشخاص تاييد نشده

I Apostol

مستند نام اشخاص تاييد نشده

N Hurduc

مستند نام اشخاص تاييد نشده

V Damian

نام الکترونيکي

نوع ماده

[Book]

تكميل شده

Y