Hjem

List of Contributors xv Preface xix Editor in Chief xxi 1 Overview: Affirmation of Nanotechnology between 2000 and 2030 1 Mihail C. Roco
1.1 Introduction 1
1.2 Nanotechnology - A FoundationalMegatrend in Science and Engineering 2
1.3 Three Stages for Establishing the New General Purpose Technology 9
1.4 Several Challenges for Nanotechnology Development 15
1.5 About the Return on Investment 16
1.6 Closing Remarks 21 Acknowledgments 22 References 22 2 Nanocarbon Materials in Catalysis 25 Xing Zhang, Xiao Zhang, and Yongye Liang
2.1 Introduction to Nanocarbon Materials 25
2.2 Synthesis and Functionalization of Nanocarbon Materials 26
2.2.1 Synthesis and Functionalization of Carbon Nanotubes 26
2.2.2 Synthesis and Functionalization of Graphene and Graphene Oxide 27
2.2.3 Synthesis and Functionalization of Carbon Nanodots 29
2.2.4 Synthesis and Functionalization of Mesoporous Carbon 29
2.3 Applications of Nanocarbon Materials in Electrocatalysis 31
2.3.1 Oxygen Reduction Reaction 32
2.3.2 Oxygen Evolution Reaction 36
2.3.3 Hydrogen Evolution Reaction 39
2.3.4 Roles of Nanocarbon Materials in Catalytic CO2 Reduction Reaction 43
2.4 Applications of Nanocarbon Materials in Photocatalysis 47
2.4.1 Application of Nanocarbon Materials as Photogenerated Charge Acceptors 48
2.4.2 Application of Nanocarbon Materials as Electron Shuttle Mediator 48
2.4.3 Application of Nanocarbon Materials as Cocatalyst for Photocatalysts 50
2.4.4 Application of Nanocarbon Materials as Active Photocatalyst 51
2.5 Summary 51 Acknowledgments 52 References 52 3 Controlling and Characterizing Anisotropic Nanomaterial Dispersion 65 Virginia A. Davis andMicah J. Green
3.1 Introduction 65
3.2 What Is Dispersion andWhy Is It Important? 66
3.2.1 Factors Affecting Dispersion 73
3.2.2 Thermodynamic Dissolution of Pristine Nanomaterials 73
3.2.3 Intermolecular Potential in Dispersions 74
3.2.4 Functionalization of Nanomaterials 75
3.2.5 Physical Mixing 77
3.2.5.1 Sonication 77
3.2.5.2 Solvent IntercalationMethods 78
3.2.5.3 Shear Mixing Methods 78
3.3 Characterizing Dispersion State in Fluids 81
3.3.1 Visualization 81
3.3.2 Spectroscopy 83
3.3.3 TEM 85
3.3.4 AFM 85
3.3.5 Light Scattering 85
3.3.6 Rheology 86
3.4 Characterization of Dispersion State in Solidified Materials 88
3.4.1 Microscopy 89
3.4.2 Electrical Percolation 89
3.4.3 Mechanical Property Enhancement 89
3.4.4 Thermal Property Changes 90
3.5 Conclusion 90 Acknowledgments 90 References 91 4 High-Throughput Nanomanufacturing via Spray Processes 101 Gauri Nabar,Matthew Souva, Kil Ho Lee, Souvik De, Jodie Lutkenhaus, Barbara Wyslouzil, and Jessica O.Winter
4.1 Introduction 101
4.2 Flash Nanoprecipitation 104
4.2.1 Overview 104
4.2.2 Importance of Rapid Mixing 105
4.2.3 Mixers Employed in FNP 106
4.2.3.1 Confined Impinging Jet Mixers (CIJMs) 106
4.2.3.2 Multi-Inlet Vortex Mixers (MIVMs) 107
4.2.3.3 Mixer Selection 107
4.2.4 FNP Product Structure 107
4.2.5 Applications of FNP Nanocomposites 108
4.3 Electrospray 108
4.3.1 Overview 108
4.3.2 Single Nozzle Electrospray 109
4.3.2.1 Forces and Modes of Electrospray 109
4.3.2.2 Applications of Single Nozzle Electrospray 110
4.3.3 Coaxial Electrospray 111
4.3.3.1 Configuration 111
4.3.3.2 Applications 112
4.3.4 Future Directions 113
4.4 Liquid-in-Liquid Electrospray 113
4.4.1 Overview 113
4.4.2 Importance of Relative Conductivities of the Dispersed and Continuous Phases 114
4.4.3 Modified Liquid-in-Liquid Electrospray Designs 115
4.4.4 Applications and Future Directions 117
4.5 Spray-Assisted Layer-by-Layer Assembly 117
4.5.1 Overview 117
4.5.2 Influence of Processing Parameters on Film Quality 119
4.5.2.1 Effect of Concentration 120
4.5.2.2 Effect of Spraying Time 120
4.5.2.3 Effect of Spraying Distance 120
4.5.2.4 Effect of Air Pressure 121
4.5.2.5 Effect of Charge Density 121
4.5.2.6 Effect of Rinsing and Blow-Drying 122
4.5.2.7 Effect of Rinsing Solution 122
4.5.3 Applications 122
4.5.4 Future Directions 123
4.6 Conclusion and Future Directions 123 References 123 5 Overview of Nanotechnology in Military and Aerospace Applications 133 Eugene Edwards, Christina Brantley, and Paul B. Ruffin
5.1 Introduction 133
5.2 Implications of Nanotechnology in Military and Aerospace Systems Applications 134
5.3 Nano-Based Microsensor Technology for the Detection of Chemical Agents 135
5.3.1 Surface-Enhanced Raman Spectroscopy 135
5.3.1.1 Design Approach 136
5.3.1.2 Experiment 137
5.3.1.3 Results 138
5.3.2 Voltammetric Techniques 139
5.3.2.1 Design Approach 140
5.3.2.2 Experimental/Test Setup 142
5.3.2.3 Results 143
5.3.3 Functionalized Nanowires - Zinc Oxide 145
5.3.3.1 Design Approach 145
5.3.3.2 Experimental/Test Setup 146
5.3.3.3 Results 146
5.3.4 Functionalized Nanowires - Tin Oxide 147
5.3.4.1 Design Approach 148
5.3.4.2 Prototype Configuration/Testing 148
5.3.4.3 Results 148
5.4 Nanotechnology for Missile Health Monitoring 149
5.4.1 Nanoporous Membrane Sensors 150
5.4.1.1 Design Approach 150
5.4.1.2 Experimental Setup and Prototype Configuration 150
5.4.1.3 Results 152
5.4.2 Multichannel Chip with Single-Walled Carbon Nanotubes Sensor Arrays 154
5.4.2.1 Design Concept 154
5.4.2.2 Experimental Configuration 154
5.4.2.3 Results 155
5.4.3 Optical Spectroscopic Configured Sensing Techniques - Fiber Optics 155
5.4.3.1 Design Concept Spectroscopic Sensing 156
5.4.3.2 Experimental Approach/Aged Propellant Samples 156
5.4.3.3 Results from Absorption Measurements 157
5.5 Nanoenergetics - Missile Propellants 158
5.5.1 Multiwall Carbon Nanotubes 158
5.5.1.1 Design Approach 158
5.5.1.2 Experiment 159
5.5.1.3 Results 160
5.5.2 Single-Wall Carbon Nanotubes 160
5.5.2.1 Design Approach 160
5.5.2.2 Experiment 161
5.5.2.3 Results 162
5.6 Nanocomposites for Missile Motor Casings and Structural Components 162
5.6.1 Thermal Methods 162
5.6.2 VibrationalMethods 164
5.6.2.1 Design Approach 164
5.6.2.2 Experiment 164
5.6.2.3 Results 165
5.7 Nanoplasmonics 167
5.7.1 Metallic Nanostructures 168
5.7.2 Gallium-Based UV Plasmonics 169
5.8 Nanothermal Batteries and Supercapacitors 169
5.9 Conclusion 172 References 173 6 Novel Polymer Nanocomposite Ablative Technologies for Thermal Protection of Propulsion and Reentry Systems for Space Applications 177 Joseph H. Koo and Thomas O. Mensah
6.1 Introduction 177
6.2 Motor Nozzle and Insulation Materials 179
6.2.1 Behavior of Ablative Materials 182
6.3 Advanced Polymer Nanocomposite Ablatives 184
6.3.1 Polymer Nanocomposites for Motor Nozzle 185
6.3.1.1 Phenolic Nanocomposites Studies byThe University of Texas at Austin 185
6.3.1.2 Phenolic-MWNT Nanocomposites Studies by Texas State University-San Marcos 188
6.3.2 Polymer Nanocomposites for Internal Insulation 189
6.3.2.1 Thermoplastic Polyurethane Nanocomposite (TPUN) Studies by The University of Texas at Austin 190
6.4 New Sensing Technology 195
6.4.1 In situ Ablation Recession and Thermal Sensors 196
6.4.1.1 Production of the C/C Sensor Plugs 198
6.4.1.2 Ablation Test Results of Carbon/Carbon Sensors 200
6.4.1.3 Ablation Test Results of Carbon/Phenolic Carbon Sensors 209
6.4.1.4 Other Ablation Sensors Results 211
6.4.1.5 Summary and Conclusions 212
6.4.2 Char Strength Sensor 213
6.4.2.1 Setup and Calibration of Compression Sensor 214
6.4.2.2 Analysis Method 215
6.4.2.3 Char Compressive Strength Results 216
6.4.2.4 Additional Considerations on the Interpretation of the Data 223
6.4.2.5 Concluding Remarks 226
6.5 Technologies Needed to Advance Polymer Nanocomposite Ablative Research 227
6.5.1 Thermophysical Properties Characterization 227
6.5.1.1 Thermal Conductivity 227
6.5.1.2 Thermal Expansion 228
6.5.1.3 Density and Composition 228
6.5.1.4 Microstructure 229
6.5.1.5 Elemental Composition 229
6.5.1.6 Char Yield 229
6.5.1.7 Specific Heat 229
6.5.1.8 Heat of Combustion 230
6.5.1.9 Optical Properties 230
6.5.1.10 Porosity 230
6.5.1.11 Permeability 230
6.5.2 Ablation Modeling 231
6.6 Summary and Conclusion 236 Nomenclature 236 Acronyms 237 Acknowledgments 237 References 238 7 Manufacture of Multiscale Composites 245 David O. Olawale,Micah C. McCrary-Dennis, and Okenwa O. Okoli
7.1 Introduction 245
7.1.1 Multifunctionality of Multiscale Composites 245
7.1.2 Nanomaterials 247
7.2 Nanoconstituents Preparation Processes 249
7.2.1 Functionalization of CNTs 249
7.2.1.1 Chemical Functionalization 249
7.2.1.2 Physical (Noncovalent) Functionalization 250
7.2.2 Dispersion of Carbon Nanotubes 252
7.2.2.1 Ultrasonication 254
7.2.2.2 Calendering Process 255
7.2.2.3