Piezoelectric ZnO Nanostructure for Energy Harvesting, Volume 1 [Hardcover]

Over the past decade, ZnO as an important II-VI semiconductor has attracted much attention within the scientific community over the world owing to its numerous unique and prosperous properties. This material, considered as a “future material”, especially in nanostructural format, has aroused many interesting research works due to its large range of applications in electronics, photonics, acoustics, energy and sensing. The bio-compatibility, piezoelectricity & low cost fabrication make ZnO nanostructure a very promising material for energy harvesting.

PREFACE ix

ACKNOWLEDGEMENTS xi

INTRODUCTION xiii

CHAPTER 1. PROPERTIES OF ZNO 1

1.1. Crystal structure of ZnO 1

1.2. Electrical properties of ZnO and Schottky junction ZnO/Au 3

1.3. Optical properties of ZnO 14

1.4. Piezoelectricity of ZnO 16

CHAPTER 2. ZNO NANOSTRUCTURE SYNTHESIS 21

2.1. Electrochemical deposition for ZnO nanostructure 22

2.1.1. Electrodeposition of monocrystalline ZnO nanowires and nanorods via template method 24

2.1.2. ZnO nanowire array growth via electrochemical road 29

2.2. Hydrothermal method for ZnO nanowire array grow 31

2.3. Comparative discussion on ZnO nanowire arrays obtained via electrodeposition and hydrothermal method 33

2.4. Influence of main parameters of hydrothermal method on ZnO nanowire growth morphology 36

2.4.1. Effect of the growth method 36

2.4.2. Effect of the growth solution pH value 38

2.4.3. Effect of the growth temperature 40

2.4.4. Effect of the growth time 41

2.5. Electrospinning method for ZnO micro/nanofiber synthesis 44<l3(