Surface plasmon mediated optical properties of ZnO/Au/TiO2 nanoheterostructure rod arrays

被引：11

作者：

Javed, Faiza ^{[1
]}

Javed, Sofia ^{[2
]}

Akram, Muhammad Aftab ^{[2
]}

Mujahid, Mohammad ^{[2
]}

Islam, Mohammad ^{[3
]}

Bhatti, Arshad Saleem ^{[1
]}

机构：

[1] COMSATS Inst Informat Technol, Dept Phys, Ctr Micro & Nano Devices, Islamabad 44000, Pakistan

[2] Natl Univ Sci & Technol, Sch Chem & Mat Engn, Sect H-12, Islamabad 44000, Pakistan

[3] King Saud Univ, Adv Mfg Inst, Ctr Excellence Res Engn Mat, POB 800, Riyadh 11421, Saudi Arabia

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2018年 / 231卷

关键词：

SPR; Au nanoparticles; ZnO/Au/TiO2; nanorods; UV/Vis absorption spectroscopy; PL spectroscopy; SENSITIZED SOLAR-CELLS; NANOSTRUCTURES; NANOPARTICLES; FLUORESCENCE;

D O I：

10.1016/j.mseb.2018.08.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the effect of surface plasmon modes of Au-NPs embedded in ZnO/Au/TiO2 nanoheterostructures on its optical properties. Au NPs of various sizes were coated on ZnO nanrods and then covered by a thin film of TiO2. The ZnO and TiO2 were synthesized in wurtzite and anatase phases, respectively. SEM and TEM images showed that ZnO nanorods were aligned; Au had spherical morphology covered by TiO2. The observed SPR mode was red shifted from 600 nm (2.06 eV) to 633 nm (1.96 eV). The PL spectra showed two bands, UV (3.1 eV) and red (1.8-2.0 eV) bands, which decreased in intensity with the increase in the strength of SPR mode. The ratio of UV to red band integrated intensities followed the SPR intensity attributed to transfer of hot carriers from Au-NPs to TiO2 layer. The present study confirmed the tuning of optical properties through plasmon resonances in nanoheterostructures.

引用

页码：32 / 39

页数：8

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