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High Frequency Acoustics in Colloid-Based Meso- and Nanostructures by Spontaneous Brillouin Light Scattering

:	Tim Still
:	High Frequency Acoustics in Colloid-Based Meso- and Nanostructures by Spontaneous Brillouin Light Scattering
:	Springer-Verlag
:	9783642134838
:	1
:	CHF 85.40
:

:	Organische Chemie
:	English

:	144
:	Wasserzeichen/DRM
:	PC/MAC/eReader/Tablet
:	PDF

This book deals with the exploration of phononic properties of

meso- and nanostructured colloid-based composite materials at hypersonic (GHz) frequencies. It contains new research results in the emerging field of phononics.

	Supervisor’s Foreword	8
	Acknowledgments	9
	1 Introduction	18
	1.1…General Introduction	18
	1.2…Aims and Motivation	23
	1.3…Outline	24
	References	24
	2 Basics and Brillouin Light Scattering	26
	2.1…Elastic Waves in Condensed Matter	26
	2.1.1 Elasticity Theory Basics	26
	2.1.2 Elastic Waves in Isotropic Media	31
	2.1.3 Spherical Waves	32
	2.2…Light Scattering Basics	33
	2.3…Brillouin Light Scattering	37
	2.3.1 BLS Basics	38
	2.3.2 BLS Instrumentation	42
	2.3.3 Vibrational Modes of Individual Particles	49
	References	51
	3 Methods	52
	3.1…Vertical Lifting Deposition and Colloidal Crystals	52
	3.2…Melt Compression	54
	3.3…Polymer and Colloid Characterization Techniques	55
	3.3.1 Photon Correlation Spectroscopy	55
	3.3.2 Electron Microscopy	56
	3.3.3 Differential Scanning Calorimetry	57
	3.3.4 Density Gradient Column	57
	3.3.5 Wide Angle X-ray Scattering	58
	3.3.6 UV/VIS Spectroscopy	58
	3.3.7 Gel Permeation Chromatography	59
	3.4…Theoretical Calculations	60
	3.4.1 Single-sphere Scattering Cross-section Calculations	61
	3.4.2 The Plane Wave Method	62
	3.4.3 The Multiple Scattering Method	64
	3.4.4 The Finite Element Method	68
	References	68
	4 The Vibrations of Individual Colloids	70
	4.1…Introduction	70
	4.2…Elastic Vibrations in Homogeneous Polymer Colloids	72
	4.2.1 The ‘music’ of the spheres	72
	4.2.2 The Influence of the Neighbors: Mixtures	78
	4.2.3 The Influence of the Rigidity: Copolymers	80
	4.2.4 The Influence of the Wave Vector: Suspensions	86
	4.3…Elastic Vibrations in Nanostructured Colloids	88
	4.3.1 The Influence of the Temperature: PS--SiO2 Core--Shell Particles	88
	4.3.2 The Influence of the Components: SiO2--PMMA Core--Shell Particles	94
	4.4…Materials	101
	4.4.1 Homogeneous Polymer Colloids	101
	4.4.2 Homogeneous Silica Colloids	102
	4.4.3 PS--SiO2 Core--Shell Particles	102
	4.4.4 SiO2--PMMA Core--Shell Particles	103
	References	103
	5Phononic Behavior of Colloidal Systems	105
	5.1 Introduction	105
	5.1.1 The Phononic Band Diagram	107
	5.1.2 The Effective Medium	110
	5.1.3 Phononic Band Gaps	112
	5.1.3.1 Normalization	115
	5.2 Effective Medium Velocity in Defect Doped Opals	116
	5.3 Band Gaps in Polymer Opals and Disordered Systems	120
	5.3.1 The Influence of the Order in Colloidal Systems	120
	5.3.2 The Influence of the Composition in Disordered ColloidalSystems	127
	5.4 Band Gaps in SiO2 Colloidal Systems	129
	5.4.1 Phononic Behavior of Silica Suspensions	130
	5.4.2 Silica–Poly(ethyl acrylate) Films (PhoXonics)	133
	5.5 Materials	136
	5.5.1 Melt Compressed Silica–Poly(ethyl acrylate) Films	137
	6 Smaller than Colloids: Characterization of Stable Organic Glass	139
	6.1…Introduction	139
	6.2…BLS Experiments on IMC	140
	6.3…Materials and Methods	144
	6.3.1 Stable Glass	144
	6.3.2 BLS Measurements	145
	References	145
	7 Concluding Remarks	147
	7.1…Conclusions	147
	7.2…Outlook	149
	References	150
	8 Appendix: Scattering Geometry	151
	8.1…Transmission Case	151
	8.2…Reflection Case	152
	Curriculum Vitae	155
	Presentations in International Conferences	156
	Index	158