Effect of ablation laser pulse repetition rate on the surface protrusion density of hydroxyapatite thin films deposited using pulsed laser deposition

被引：8

作者：

Nishikawa, Hiroaki ^{[1
]}

Umatani, Shinji ^{[1
]}

机构：

[1] Kindai Univ, Fac Biol Oriented Sci & Technol, 930 Nishi Mitani, Wakayama 6496493, Japan

来源：

MATERIALS LETTERS | 2017年 / 209卷

关键词：

Hydroxyapatite; Pulsed laser deposition; Pulse repetition rate; Surface protrusion; REDUCTION; GROWTH;

D O I：

10.1016/j.matlet.2017.08.047

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of the pulse repetition rate of the ablation laser on surface protrusion density was investigated for hydroxyapatite thin films deposited using pulsed laser deposition. Atomic force microscope surface images showed a marked decrease in surface protrusion density at lower pulse repetition rate, while protrusion-free areas exhibited similar morphologies independent of the pulse repetition rate. These results indicate that the surface protrusions were not formed or enlarged from surface migration of atomic species on the surface, which formed the smooth surface of the protrusion-free area. The postulated origin of the protrusions was large particles or droplets produced directly from the target irradiated with the ablation laser. These results suggest that the optimum pulse repetition rate for protrusion-free hydroxyapatite thin film surfaces is <= 3 Hz. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：330 / 333

页数：4

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