Metallic Butterfly Wing Scales (eBook)

Preface 6
Contents 8
Chapter-1 10
Background 10
1.1 Plasmonic Structures 11
1.1.1 Functional Structures of Natural Species 14
1.1.2 Replication of Biostructures into Functional Materials 15
1.2 Butterfly Scale Structures and Their Applications 17
1.3 Contents of this Book 21
References 21
Chapter-2 27
Toward Metallic Butterfly Wing Scales 27
2.1 Introduction 27
2.2 Biotemplate Selection 28
2.3 Cu Scale Replicas Prepared via H2 Reduction Under High Temperatures 32
2.3.1 Sample Preparation 33
2.3.2 Characterizations 33
2.4 Ag Scale Replicas Prepared via Photoreduction Under Mild Temperatures 36
2.4.1 Sample Preparation 36
2.4.2 Formation Mechanisms 36
2.4.3 Characterizations 38
2.5 Summary 41
References 42
Chapter-3 44
Metal Scale Replicas Prepared via Electroless Deposition 44
3.1 Introduction 44
3.2 Sample Preparation 45
3.3 Replication Mechanisms 47
3.3.1 FTIR Analyses on Original Butterfly Wings Before and After Pretreatments 47
3.3.2 Surface Treatment Using Au Nanoparticles 49
3.3.3 Removal of Biotemplates 51
3.4 Characterizations on as-Prepared Metal Replicas 52
3.4.1 Morphologies 52
3.4.2 Phases 56
3.5 Summary 59
References 59
Chapter-4 61
Surface-Enhanced Raman Scattering (SERS) Performance of Metal Scale Replicas 61
4.1 Introduction 61
4.2 Sample Preparation for SERS Detections 62
4.3 SERS Performance of Ag Replicas with Various ?Structures 64
4.4 SERS Properties of Au Butterfly Wing Scales with Ordered Structures 68
4.5 Summary 72
References 72
Chapter-5 75
Surface-Enhanced Raman Scattering (SERS) Mechanisms of Metal Scale Replicas 75
5.1 Introduction 75
5.2 SERS Performance of Cu Butterfly Wing Scales 77
5.3 Dominant Structural Contributor to SERS Performance 81
5.4 Hotspots in Au Scales 86
5.5 Experimental Verification 89
5.6 Summary 91
References 93
Chapter-6 95
Conclusions and Perspectives 95
References 97
Index 98