Study on Structural, Mechanical, and Optical Properties of Al2O3-TiO2 Nanolaminates Prepared by Atomic Layer Deposition

被引：58

作者：

Iatsunskyi, Igor ^{[1
]}

Coy, Emerson ^{[1
]}

Viter, Roman ^{[3
]}

Nowaczyk, Grzegorz ^{[1
]}

Jancelewicz, Mariusz ^{[1
]}

Baleviciute, Ieva ^{[4
,5
]}

Zaleski, Karol ^{[1
]}

Jurga, Stefan ^{[1
,2
]}

机构：

[1] Adam Mickiewicz Univ, NanoBioMed Ctr, PL-61614 Poznan, Poland

[2] Adam Mickiewicz Univ, Dept Macromol Phys, PL-61614 Poznan, Poland

[3] Latvian State Univ, Inst Atom Phys & Spect, LV-1586 Riga, Latvia

[4] Vilnius State Univ, Dept Chem, LT-03225 Vilnius, Lithuania

[5] Ctr Phys & Technol Sci, State Res Inst, Inst Semicond Phys, Lab BioNanoTechnol, LT-01108 Vilnius, Lithuania

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2015年 / 119卷 / 35期

关键词：

TIO2; THIN-FILMS; ANATASE; ALD; PHOTOLUMINESCENCE; MORPHOLOGY; HARDNESS; XPS;

D O I：

10.1021/acs.jpcc.5b06745

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Structural, optical, and mechanical properties of Al2O3/TiO2 nanolaminates fabricated by atomic layer deposition (ALD) were investigated. We performed transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray reflectivity (XRR), energy dispersive X-ray spectroscopy (EDX), ellipsometry, UV vis spectroscopy, photoluminescence (PL) spectroscopy, and nanointendation to characterize the Al2O3/TiO2 nanolaminates. The main structural, optical, and mechanical parameters of Al2O3/TiO2, nanolaminates (thickness, grain size, refractive index, extinction coefficient, band gap, hardness, and Young's module) were calculated. It was established that with decreasing of the layer thickness, the value of band gap energy increases due to the quantum size effect related to the reduction of the nanograins size. On the other hand, the decreasing of nanograins size leads to generation of interface defects and, as a consequence, to the increasing of Urbach energy. It was also shown that there is an interdiffusion layer at the Al2O3-TiO2 interface, which plays a crucial role in explaining mechanical and optical properties of Al2O3/TiO2 nanolaminates. The correlation between structural, optical, and mechanical parameters was discussed.

引用

页码：20591 / 20599

页数：9