Nanomaterials (Paperback, 2)

Preface IX

1 Nanomaterials: An Introduction 1

2 Nanomaterials and Nanocomposites 5

2.1 Introduction 5

2.2 Elementary Consequences of Small Particle Size 12

2.2.1 Surface of Nanoparticles 12

2.2.2 Thermal Phenomena 13

2.2.3 Diffusion Scaling Law 14

2.2.4 Scaling of Vibrations 20

References 22

3 Surfaces in Nanomaterials 23

3.1 General Considerations 23

3.2 Surface Energy 25

3.3 Some Technical Consequences of Surface Energy 36

References 42

4 Gas-Phase Synthesis of Nanoparticles 45

4.1 Fundamental Considerations 45

4.2 Inert Gas Condensation Process 56

4.3 Physical and Chemical Vapor Synthesis Processes 57

4.4 Laser Ablation Process 60

4.5 Radio- and Microwave Plasma Processes 64

4.6 Flame Aerosol Process 72

4.7 Synthesis of Coated Particles 82

References 87

5 Nanotubes, Nanorods, and Nanoplates 89

5.1 General Considerations 89

5.1.1 Conditions for the Formation of Rods and Plates 93

5.1.2 Layered Structures 94

5.1.3 One-Dimensional Crystals 95

5.2 Nanostructures Related to Compounds with Layered Structures 98

5.2.1 Carbon Nanotubes and Graphene 98

5.2.2 Nanotubes and Nanorods from Materials other than Carbon 109

5.2.3 Synthesis of Nanotubes and Nanorods 113

References 120

6 Nanofluids 123

6.1 Definition 123

6.2 Nanofluids for Improved Heat Transfer 123

6.3 Ferrofluids 127

6.3.1 General Considerations 127

6.3.2 Properties of Ferrofluids 127

6.3.3 Applications of Ferrofluids 129

References 133

7 Phase Transformations of Nanoparticles 135

7.1 Thermodynamics of Nanoparticles 135

7.2 Heat Capacity of Nanoparticles 136

7.3 Phase Transformations of Nanoparticles 139

7.4 Phase Transformation and Coagulation 148

7.5 Structures of Nanoparticles 149

7.6 A Closer Look at Nanoparticle Melting 153

7.7 Structural Fluctuations 159

References 165

8 Magnetic Properties of Nanoparticles 167

8.1 Magnetic Materials 167

8.2 Superparamagnetic Materials 171

8.3 Susceptibility and Related Phenomena in Superparamagnets 184

8.4 Applications of Superparamagnetic Materials 191

8.5 Exchange-Coupled Magnetic Nanoparticles 196

References 203

9 Optical Properties of Nanoparticles 205

9.1 General Remarks 205

9.2 Adjustment of the Index of Refraction 205

9.3 Optical Properties Related to Quantum Confinement 209

9.4 Quantum Dots and Other Lumophores 223

9.5 Metallic and Semiconducting Nanoparticles Isolated and in Transparent Matrices 231

9.6 Special Luminescent Nanocomposites 243

9.7 Electroluminescence 250

9.8 Photochromic and Electrochromic Materials 257

9.8.1 General Considerations 257

9.8.2 Photochromic Materials 257

9.8.3 Electrochromic Materials 259

9.9 Materials for Combined Magnetic and Optic Applications 261

References 267

10 Electrical Properties of Nanoparticles 269

10.1 Fundamentals of Electrical Conductivity in Nanotubes and Nanorods 269

10.2 Nanotubes 278

10.3 Photoconductivity of Nanorods 284

10.4 Electrical Conductivity of Nanocomposites 288

References 296

11 Mechanical Properties of Nanoparticles 299

11.1 General Considerations 299

11.2 Bulk Metallic and Ceramic Materials 302

11.2.1 Influence of Porosity 302

11.2.2 Influence of Grain Size 304

11.2.3 Superplasticity 317

11.3 Filled Polymer Composites 319

11.3.1 Particle-Filled Polymers 319

11.3.2 Polymer-Based Nanocomposites Filled with Platelets 323

11.3.3 Carbon Nanotube- and Graphene-Based Composites 329

References 333

12 Characterization of Nanomaterials 335

12.1 General Remarks 335

12.2 Global Methods for Characterization 335

12.2.1 Specific Surface Area 335

12.3 X-Ray and Electron Diffraction 341

12.4 Electron Microscopy 349

12.4.1 General Considerations 349

12.4.2 Interaction of the Electron Beam and Specimen 353

12.4.3 Localized Chemical Analysis in the Electron Microscope 358

12.4.4 Scanning Transmission Electron Microscopy Using a High-Angle Annular Dark-Field Detector 365

References 367

Index 369