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Artificial Nanoparticle-Polymer Superlattices : 나노입자와 고분자로 구성된 인공 초격자에 대한 연구
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 손병혁 | - |
dc.contributor.advisor | Wolfgang Tremel | - |
dc.contributor.author | 후스만한나 | - |
dc.date.accessioned | 2017-07-14T05:57:52Z | - |
dc.date.available | 2017-07-14T05:57:52Z | - |
dc.date.issued | 2016-08 | - |
dc.identifier.other | 000000136216 | - |
dc.identifier.uri | https://hdl.handle.net/10371/125318 | - |
dc.description | 학위논문 (박사)-- 서울대학교 대학원 : 화학부 고분자화학전공, 2016. 8. Wolfgang Tremel. | - |
dc.description.abstract | Hybrid superlattices (SLs) consisting of soft polymers with low refractive index polymers and hard oxide nanoparticles with high refractive are highly suitable materials for the application in 1D phononic and photonic crystals.
In this theses the synthesis of titania and barium titanate nanospheres as building blocks for such SLs is described, including the influence of solvents and ligands on the particles synthesis. In the case of titania nanoparticles the morphology could be changed from spheres to cubes and the assembly of these nanocubes into mesocrystals is presented. In the case of barium titanate the addition of different amounts of ligand into the reaction mixture, to control the morphology, is investigated and first experiments on the assembly of ferroelectric barium titanate rods in an electric field are conducted. Further different SLs are built-up and characterized using scanning electron microscopy, UV-Vis- and Brillouin spectroscopy to monitor the morphology, to identify the photonic band gaps and to invest the phonon propagation respectively. In this work, the focus is set on the fabrication of the SLs using the facile method of spin coating. Special emphasis was put on the conditions needed to obtain highly homogenous multilayered SLs in the nanometer range from poly(methyl methacrylate) (PMMA) as soft low refractive index materials, and titania, barium titanate and silica nanoparticles as hard, high refractive index materials. Beside simple (AB)n structured SLs, with A being PMMA and B being oxide nanoparticles, more complex structured SLs are invested. For example a tandem SL built-up from two different (AB)n-type lattices and SLs with a higher periodicity like (ABAC)n-type SLs were built-up and characterized. Further the difficulties of spin coating a SL containing colloidal particles as a defect layer in an (AB)n-type SLs and the influence on the phononic band structure is discussed. Finally the substitution of PMMA through stimuli responsive poly(2-vinyl pyridine) (P2VP) was examined and preliminary experiment on the swelling behaviour of P2VP as a layer material showed the potential of P2VP to built water vapour responsive photonic crystals. The studies conducted in this work help to offer the fundamental knowledge about the propagation of photon and phonon within 1D SLs, focusing on the synthesis of building blocks and the fabrication of SLs. It is expected that this understanding will enormously contribute to the development of acoustic diodes and heat flownmanaging devices in the future. | - |
dc.description.tableofcontents | Part I Introduction 1
1 Photonic Superlattices 3 2 Phononic Superlattices 7 3 Pho(X)onic Superlattices 11 4 Aims and Objectives 13 Part II Building Blocks 15 5 Synthesis and Application of TiO2 Nanoparticles 17 5.1 Abstract 17 5.2 Introduction 17 5.3 Results and Discussion 19 5.4 Experimental Section 27 5.5 Supporting Information 28 6 Synthesis and Application of BaTiO3 Nanoparticles 33 6.1 Introduction 33 6.2 Typical Synthesis of Barium Titanate Nanospheres 34 6.3 Barium Titanate Nanorods: Synthesis and Orientation in an Electric Field 36 6.4 Summary and Outlook 40 6.5 Experimental Details 41 Part III Superlattices 43 7 Fabrication Method of the Superlattices 45 7.1 Spin Coating Technique 45 7.2 Spin Coating Solutions 47 8 Characterisation 51 8.1 Optical Characterisation 51 8.2 Mechanical Characterisation 51 8.3 Structure of the Samples 54 9 Pho(X)onic Superlattice 57 9.1 Abstract 57 9.2 Introduction 57 9.3 Results and Discussion 59 9.4 Conclusion 66 9.5 Materials and Methods 68 9.6 Additional Comments 70 10 PMMA-BaTiO3 Superlattices 73 10.1 Introduction 73 10.2 Results and Discussion 73 10.3 Summary and Outlook 80 10.4 Experimental Details 80 11 A Tandem Superlattice 81 11.1 Introduction 81 11.2 Results and Discussion 82 11.3 Summary 86 11.4 Experimental Details 87 12 Superlattices with an (ABAC)n Periodicity 89 12.1 Introduction 89 12.2 Results and Discussion 90 12.3 Summary 95 12.4 Experimental Details 95 13 Superlattice with a cSiO2 Defect Layer 97 13.1 Introduction 97 13.2 Results and Discussion 98 13.3 Summary and Outlook 102 13.4 Experimental Details 103 14 Responsive Layers 105 14.1 Introduction 105 14.2 Preliminary Experiments 106 14.3 Summary and Outlook 111 14.4 Experimental Details 112 Part IV Summary & Outlook 113 15 Summary 115 16 Outlook 117 Bibliography 119 List of Figures 129 List of Tables 133 List of acronyms 135 | - |
dc.format | application/pdf | - |
dc.format.extent | 22721188 bytes | - |
dc.format.medium | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject | photonic | - |
dc.subject | phononic | - |
dc.subject | superlattices | - |
dc.subject | nanoparticles | - |
dc.subject | polymer | - |
dc.subject | spin coating | - |
dc.subject.ddc | 540 | - |
dc.title | Artificial Nanoparticle-Polymer Superlattices | - |
dc.title.alternative | 나노입자와 고분자로 구성된 인공 초격자에 대한 연구 | - |
dc.type | Thesis | - |
dc.contributor.AlternativeAuthor | Hannah Huesmann | - |
dc.description.degree | Doctor | - |
dc.citation.pages | 159 | - |
dc.contributor.affiliation | 자연과학대학 화학부 | - |
dc.date.awarded | 2016-08 | - |
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