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通过紫外飞秒激光束实现聚苯乙烯薄膜的纳米结构化：从一个点到大面积表面

Polystyrene Thin Films Nanostructuring by UV Femtosecond Laser Beam: From One Spot to Large Surface.

作者信息

Shavdina Olga, Rabat Hervé, Vayer Marylène, Petit Agnès, Sinturel Christophe, Semmar Nadjib

机构信息

GREMI (Groupe de Recherches sur l'Energétique des Milieux Ionisés)-UMR (Unité Mixte de Recherche) 7344-CNRS, University of Orleans, 45067 Orléans, France.

ICMN (Interfaces, Confinement, Matériaux et Nanostructures)-UMR (Unité Mixte de Recherche) 7374-CNRS, Université d'Orleans, 45071 Orléans, France.

出版信息

Nanomaterials (Basel). 2021 Apr 21;11(5):1060. doi: 10.3390/nano11051060.

DOI:10.3390/nano11051060
PMID:33919090
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8143183/
Abstract

In this work, direct irradiation by a Ti:Sapphire (100 fs) femtosecond laser beam at third harmonic (266 nm), with a moderate repetition rate (50 and 1000 Hz), was used to create regular periodic nanostructures upon polystyrene (PS) thin films. Typical Low Spatial Frequency LIPSSs (LSFLs) were obtained for 50 Hz, as well as for 1 kHz, in cases of one spot zone, and also using a line scanning irradiation. Laser beam fluence, repetition rate, number of pulses (or irradiation time), and scan velocity were optimized to lead to the formation of various periodic nanostructures. It was found that the surface morphology of PS strongly depends on the accumulation of a high number of pulses (10 to 10 pulses) at low energy (1 to 20 µJ/pulse). Additionally, heating the substrate from room temperature up to 97 °C during the laser irradiation modified the ripples' morphology, particularly their amplitude enhancement from 12 nm (RT) to 20 nm. Scanning electron microscopy and atomic force microscopy were used to image the morphological features of the surface structures. Laser-beam scanning at a chosen speed allowed for the generation of well-resolved ripples on the polymer film and homogeneity over a large area.

摘要

在这项工作中，使用钛宝石（100飞秒）飞秒激光束在三倍频（266纳米）下以适中的重复频率（50和1000赫兹）进行直接照射，在聚苯乙烯（PS）薄膜上创建规则的周期性纳米结构。在单光斑区域以及使用线扫描照射的情况下，对于50赫兹以及1千赫兹，都获得了典型的低空间频率激光诱导表面周期性结构（LSFLs）。对激光束能量密度、重复频率、脉冲数（或照射时间）和扫描速度进行了优化，以形成各种周期性纳米结构。发现PS的表面形态强烈依赖于在低能量（1至20微焦/脉冲）下大量脉冲（10至10个脉冲）的积累。此外，在激光照射期间将基板从室温加热到97°C改变了波纹的形态，特别是它们的幅度从12纳米（室温）增强到20纳米。使用扫描电子显微镜和原子力显微镜对表面结构的形态特征进行成像。以选定速度进行激光束扫描能够在聚合物薄膜上产生分辨率良好的波纹，并在大面积上实现均匀性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/3ac28c3769c2/nanomaterials-11-01060-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/fbd310b08159/nanomaterials-11-01060-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/41a3d29193b1/nanomaterials-11-01060-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/801bf3472ff4/nanomaterials-11-01060-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/6030ab356ae9/nanomaterials-11-01060-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/2fb9b89f050f/nanomaterials-11-01060-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/ba93602f0c8a/nanomaterials-11-01060-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/a5cd7f40bca1/nanomaterials-11-01060-g007a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/3cc6ffec5864/nanomaterials-11-01060-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/3ac28c3769c2/nanomaterials-11-01060-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/fbd310b08159/nanomaterials-11-01060-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/41a3d29193b1/nanomaterials-11-01060-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/801bf3472ff4/nanomaterials-11-01060-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/6030ab356ae9/nanomaterials-11-01060-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/2fb9b89f050f/nanomaterials-11-01060-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/ba93602f0c8a/nanomaterials-11-01060-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/a5cd7f40bca1/nanomaterials-11-01060-g007a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/3cc6ffec5864/nanomaterials-11-01060-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/695f/8143183/3ac28c3769c2/nanomaterials-11-01060-g009.jpg

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