High quality interconnected core/shell ZnO nanorod architectures grown by pulsed laser deposition on ZnO-seeded Si substrates

被引：12
作者：
Inguva, Saikumar [1 ,2 ]
Vijayaraghavan, Rajani K. [2 ,3 ]
McGlynn, Enda [1 ,2 ]
Mosnier, Jean-Paul [1 ,2 ]
机构：
[1] Dublin City Univ, Sch Phys Sci, Dublin 9, Ireland
[2] Dublin City Univ, Natl Ctr Plasma Sci & Technol, Dublin 9, Ireland
[3] Dublin City Univ, Sch Elect Engn, Dublin 9, Ireland
来源：
SUPERLATTICES AND MICROSTRUCTURES | 2017年 / 101卷
关键词：
ZnO; Interconnected nanorods; Core/shell nanorods; Si wafer substrates; Pulsed laser deposition; 3.331 eV in ZnO photoluminescence; CORE-SHELL; FACILE SYNTHESIS; FABRICATION; NETWORKS; ARRAYS; PERFORMANCE; NANOWIRES; NANOWALL;
D O I：
10.1016/j.spmi.2016.11.031
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report the production of vertically aligned and interconnected ZnO core/shell nanorods using pulsed laser deposition (PLD) in a continuous two-step growth process. X-ray diffraction studies showed wurtzite structure and c-axis orientation with a high degree of verticality. Scanning electron microscopy showed a characteristic interconnection morphology between the nanorod tips uniformly present over the entire sample surface area, while transmission electron microscopy revealed crystalline core/amorphous shell architecture. Strong bands at 98.7 cm(-1) and 437.2 cm(-1) (wurtzite ZnO low and high non polar E-2 modes) were the main features of the nanorod Raman spectra, again showing the high sample quality. Low-temperature PL data exhibited strong I-6 emission and structured green band showing high optical quality. Electrical studies indicated n-type material with ohmic behaviour. The results are discussed in the context of the advantages offered by interconnected architectures of core/shell ZnO nanostructures for various applications. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：8 / 14
页数：7
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