Electrohydrodynamic Direct-Writing for Flexible Electronic Manufacturing (eBook)

Zhouping Yin is a professor in Huazhong University of Science and Technology, Wuhan, China. He received the China National Funds for Distinguished Young Scientists Award in 2006, and he has been a member of the Chang jiang Scholars Program since 2009.Yongan Huang is a professor in Huazhong University of Science and Technology .Yongqing Duan is a post-doctor in Huazhong University of Science and TechnologyHaitao Zhang is a professor in Huazhong University of Science and Technology.

Foreword 5
Acknowledgements 7
Contents 8
1 Introduction of Electrohydrodynamic Printing 11
Abstract 11
1.1 Background 11
1.2 EHD Printing 13
1.2.1 Mechanism and Classification of EHD Printing 14
1.2.2 EHD Printing System 16
1.2.3 Development of EHD Direct-Writing 17
1.2.4 Advantages of EHD Direct-Writing 21
1.3 Key Technologies for EHD Printing 21
1.3.1 Printability of Ink 21
1.3.2 Nozzle 25
1.3.3 Control Method 27
1.4 Applications in Flexible Electronics 28
1.4.1 Printing of Micro/Nano-Structures 28
1.4.2 Photolithography Mask 31
1.4.3 Fiber-Based Devices 33
1.5 Conclusions 34
References 36
2 Mechano-electrospinning (MES) 40
Abstract 40
2.1 Introduction 40
2.2 Modeling and Experiments of MES 43
2.2.1 Theoretical Model 44
2.2.2 Comparison Between Experimental and Theoretical Results 47
2.3 Selection of Process Parameters 51
2.3.1 Experimental Results 51
2.3.2 Response Surface Methodology 53
2.4 Fabrication of Micro-structures 58
2.4.1 Ribbon-Lattice Structure 58
2.4.2 Dot Structure 62
2.4.3 Bead-on-String Structure 66
2.5 Conclusions 71
References 71
3 Helix Electrohydrodynamic Printing (HE-Printing) 75
Abstract 75
3.1 Introduction 75
3.2 Coiling Behavior of the Electrospinning Jet 77
3.2.1 Coiling Phenomenon 77
3.2.2 Simulations of the Coiling Behavior 78
3.2.3 Results and Discussion 80
3.3 Transformation of Patterns 83
3.3.1 Experimental Results 83
3.3.2 Transformation Rules Between Different Patterns 86
3.4 Applications of HE-Printing 91
3.4.1 Serpentine Structure 91
3.4.2 Self-similar Structure 92
3.5 Conclusions 95
References 95
4 Inks for EHD Printing 97
Abstract 97
4.1 Introduction 97
4.2 Classification of Inks 99
4.2.1 Inorganic Inks 99
4.2.2 Organic Inks 103
4.2.3 Composite Inks 106
4.3 Evaluation of Printing Performance 109
4.3.1 Viscosity 111
4.3.2 Conductivity/Surface Charge Density 116
4.3.3 Surface Tension 119
4.4 Conclusions 120
References 120
5 Nozzles for EHD Printing 125
Abstract 125
5.1 Introduction 125
5.1.1 Special Nozzle 126
5.1.2 Nozzle Array 127
5.2 Si-Based Planar Nozzle 128
5.3 Si-Based Protruding Nozzle 131
5.4 Multi-level Voltage Method for Addressable Printing 134
5.5 Conclusions 138
References 139
6 Control Method for EHD Printing 141
Abstract 141
6.1 Introduction 141
6.2 Electrospinning Sedimentary Microstructure Control 145
6.2.1 Modeling of Sedimentary Microstructure Control 145
6.2.2 Stability Analysis of the Microstructure Control System 147
6.3 Fiber Diameter Control of Electrospinning Processes 152
6.3.1 Modeling of Fiber Diameter Control 152
6.3.2 Stability Analysis of Fiber Diameter Control System 156
6.4 Conclusions 162
References 163
7 EHD Equipment and Applications 165
Abstract 165
7.1 Introduction of EHD Equipment 165
7.1.1 Functions 165
7.1.2 Module Composition 166
7.2 Stretchable Generator Based on Serpentine Fibers 175
7.2.1 Experimental Section 175
7.2.2 Results and Discussion 176
7.3 Gas Sensor Based on Hierarchical Fibers 181
7.3.1 Experimental Section 182
7.3.2 Results and Discussion 184
7.4 Flexible Small-Channel Thin-Film Transistors 188
7.4.1 Experimental Section 189
7.4.2 Results and Discussion 191
7.4.2.1 Programmable Fabrication of Micro/Nanochannels 192
7.4.2.2 Performance of Micro/Nanochannel TFT Device 193
7.4.2.3 Flexible TFT Device 196
7.5 Conclusions 198
References 198