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Preparation of periodic surface structures on doped poly(methyl metacrylate) films by irradiation with KrF excimer laser.

Kalachyova Y, Lyutakov O, Slepicka P, Elashnikov R, Svorcik V - Nanoscale Res Lett (2014)

Bottom Line: The mechanism of surface ordered structure formation is attributed to polymer ablation, which is more pronounced in the place of higher light intensity.The smoothness of the underlying substrate plays a key role in the quality of surface ordered structure.Most regular grating structures were obtained on polymer films deposited on atomically 'flat' Si substrates.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Solid State Engineering, Institute of Chemical Technology, Prague 166 28, Czech Republic.

ABSTRACT
In this work, we describe laser modification of poly(methyl methacrylate) films doped with Fast Red ITR, followed by dopant exclusion from the bulk polymer. By this procedure, the polymer can be modified under extremely mild conditions. Creation of surface ordered structure was observed already after application of 15 pulses and 12 mJ cm(-2) fluence. Formation of grating begins in the hottest places and tends to form concentric semi-circles around them. The mechanism of surface ordered structure formation is attributed to polymer ablation, which is more pronounced in the place of higher light intensity. The smoothness of the underlying substrate plays a key role in the quality of surface ordered structure. Most regular grating structures were obtained on polymer films deposited on atomically 'flat' Si substrates. After laser patterning, the dopant was removed from the polymer by soaking the film in methanol.

No MeSH data available.


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Dependence of grating amplitude on the number of laser pulses (A) and fluence (B). Insets are AFM images.
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Figure 5: Dependence of grating amplitude on the number of laser pulses (A) and fluence (B). Insets are AFM images.

Mentions: Dependence of grating amplitude on applied energy and number of pulses are shown in Figure 5. As in the previous case, the shaded areas indicate optimal parameters for grating creation. Laser fluence of 12 mJ cm−2 was found to be optimal. The optimal number of pulses was found to be very small compared with traditional surface ordered structures creation on common polymers. The number of pulses applied for grating creation is several hundreds or even thousands per sample in common cases. In our case, the initial formation of structure occurs already after 10 pulses and optimal grating was achieved after 50 pulses. The proposed method seems to be unique in terms of the energy and time used - the creation of large-area pattern is performed during several seconds at extremely low-energy costs.


Preparation of periodic surface structures on doped poly(methyl metacrylate) films by irradiation with KrF excimer laser.

Kalachyova Y, Lyutakov O, Slepicka P, Elashnikov R, Svorcik V - Nanoscale Res Lett (2014)

Dependence of grating amplitude on the number of laser pulses (A) and fluence (B). Insets are AFM images.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4215891&req=5

Figure 5: Dependence of grating amplitude on the number of laser pulses (A) and fluence (B). Insets are AFM images.
Mentions: Dependence of grating amplitude on applied energy and number of pulses are shown in Figure 5. As in the previous case, the shaded areas indicate optimal parameters for grating creation. Laser fluence of 12 mJ cm−2 was found to be optimal. The optimal number of pulses was found to be very small compared with traditional surface ordered structures creation on common polymers. The number of pulses applied for grating creation is several hundreds or even thousands per sample in common cases. In our case, the initial formation of structure occurs already after 10 pulses and optimal grating was achieved after 50 pulses. The proposed method seems to be unique in terms of the energy and time used - the creation of large-area pattern is performed during several seconds at extremely low-energy costs.

Bottom Line: The mechanism of surface ordered structure formation is attributed to polymer ablation, which is more pronounced in the place of higher light intensity.The smoothness of the underlying substrate plays a key role in the quality of surface ordered structure.Most regular grating structures were obtained on polymer films deposited on atomically 'flat' Si substrates.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Solid State Engineering, Institute of Chemical Technology, Prague 166 28, Czech Republic.

ABSTRACT
In this work, we describe laser modification of poly(methyl methacrylate) films doped with Fast Red ITR, followed by dopant exclusion from the bulk polymer. By this procedure, the polymer can be modified under extremely mild conditions. Creation of surface ordered structure was observed already after application of 15 pulses and 12 mJ cm(-2) fluence. Formation of grating begins in the hottest places and tends to form concentric semi-circles around them. The mechanism of surface ordered structure formation is attributed to polymer ablation, which is more pronounced in the place of higher light intensity. The smoothness of the underlying substrate plays a key role in the quality of surface ordered structure. Most regular grating structures were obtained on polymer films deposited on atomically 'flat' Si substrates. After laser patterning, the dopant was removed from the polymer by soaking the film in methanol.

No MeSH data available.


Related in: MedlinePlus