Investigations on the functionalization chemistry of carbon based nanostructures
- Alternative Title
- 나노구조에 기반한 탄소의기능성 표면 화학에 대한 연구
- Abstract
- In the frame of this dissertation, novel concepts for the functionalization of carbon based nanomaterials such as, 1D carbon nanotubes (CNTs) and2D graphene nanosheets with various polymer heterostructures are presented. The study also investigates the applicability of carbon nanostructures in creating novel nanostructured matrices exhibiting superior properties. The morphologies of these nanostructures and various associated properties of the composites as well as the effect of dispersion states were scrutinized. Investigations of CNT/polymer heterostructures show a significant increase in their properties with the increase of the CNTs’ content.
Additionally, unique means for the fabrication of metal nanoparticles on the nanotube surfaces that include gold and quantum dot heterostructures are also presented. These new types of nanocomposites should be more interesting and promising because, the three-component systems of CNT/polymer/metal heterostructures could combine together the individual properties of CNTs, polymers, as well as the noble metal nanoparticles. It was shown that CNTs can be effectively used to fabricate various nanoscale topographies, which in turn opens a gateway to achieving periodically functionalized CNTs for a variety of applications in various fields related to nanoscience, nanomedicine and nanotechnology. Based on the experimental results, it is inferred that carbon nanostructures as components of nanocomposite hybrid materials have a significant effect on various physical properties of these materials. Furthermore, the results underpinned in this dissertation indicate the potential of utilizing carbon-based nanostructures towards mechanical, electrical, sensing, optical, imaging, biomedical and actuating applications.
- Issued Date
- 2010
- Awarded Date
- 2010. 8
- Type
- Dissertation
- Publisher
- Pukyong National University
- Department
- 대학원 이미지시스템공학과
- Advisor
- Yeon Tae Jeong
- Table Of Contents
- Chapter 1. Carbon based Nanostructures 1
1.1 Introduction to Nanomaterials and Nanotechnology 1
1.2 Allotropes of Carbon 1
1.3 Carbon nanotubes and basic research 3
1.4 Applications of Carbon nanotubes 5
1.5 Functionalization of Carbon Nanotubes 7
1.6. Scope of this thesis 10
Bibliography 11
Chapter 2. Preparation of poly 2-hydroxyethyl methacrylate functionalized carbon nanotubes as novel biomaterial nanocomposites 12
2.1. Introduction 13
2.2. Experimental Section 15
2.2.1. Materials and methods 15
2.2.2. Preparation of carboxylic acid- functionalized MWNTs 16
2.2.3. Synthesis of 2-HEMA functionalized MWNTs 16
2.2.4. Polymerization of HEMA functionalized MWNTs 16
2.2.5. Characterization techniques 17
2.3. Results and Discussion 17
2.3.1. Functionalization of MWNTs with HEMA 17
2.3.2. Morphology of functionalized MWNTs 19
2.3.3. Thermal stability of polyHEMA-f-MWNTs 21
2.3.4. Dispersion stability of the polyHEMA-f-MWNTs 22
Conclusions 23
Bibliography 23
Chapter 3. Study on the cluster formation of poly 2-hydroxyethyl methacrylate functionalized single-walled carbon nanotubes 26
3.1 Introduction 27
3.2. Experimental Section 29
3.2.1. Materials 29
3.2.2. Grafting of HEMA monomer with SWNTs (HEMA-f-SWNTs) 29
3.2.3. Synthesis of SWNT and PolyHEMA nanocomposites 30
3.2.4. Instruments 30
3.3 Results and Discussion 31
3.3.1. Surface functionalities of SWNTs 31
3.3.2. Dispersion stability and surface morphologies of the SWNTs 34
3.3.3. Thermal stability of polyHEMA-f-SWNTs 38
Conclusion 39
Bibliography 39
Chapter 4. Surface functionalization of multiwalled carbon nanotubes with poly(3,4-propylenedioxythiophene) and preparation of its random copolymers: new hybrid materials 42
4.1. Introduction 43
4.2 Experimental Section 45
4.2.1. Materials and methods 45
4.2.2. Purification and acid oxidation of MWNTs 45
4.2.3. Synthesis of (ProDOT-OH) monomer 46
4.2.4. Functionalization of MWNT with ProDOT-OH(MWNT-f-ProDOT-OH) 46
4.2.5. Polymerization of MWNT-f-ProDOT-OH (MWNT-g-ProDOT) 47
4.2.6. Preparation of co-polymers of MWNT-f-ProDOT-OH with thiophene 47
4.2.7. Characterization and Instrumentation 47
4.3. Results and Discussion 48
Conclusions 55
Bibliography 55
Chapter 5. Functionalization of multiwalled carbon nanotubes with cysteamine for the construction of CNT/gold nanoparticle hybrid nanostructures 58
5.1 Introduction 59
5.2. Experimental Section 61
5.2.1. Materials and methods 61
5.2.2. Acid oxidation of MWNTs 61
5.2.3. Preparation of cysteamine functionalized MWNTs 61
5.2.4. Synthesis of gold colloidal solution 62
5.2.5. Self assembly of gold nanoparticles to the Cys-f-MWNTs 62
5.2.6. Characterization and Instrumentation 62
5.3. Results and Discussion 63
Conclusions 68
Bibliography 69
Chapter 6. Novel amino acid based polymer/multi-walled carbon nanotube bio-nanocomposites:Highly water dispersible carbon nanotubes decorated with gold nanoparticles 72
6.1. Introduction 73
6.2. Materials and methods 76
6.2.1. Materials 76
6.2.2. Synthesis and characterization 76
6.2.2.1. Mild oxidation of MWNTs 76
6.2.2.2. Synthesis of methacryloyl β-alanine (MBA) 77
6.2.2.3. Polymerization of MBA 77
6.2.2.4. Preparation of gold colloidal solution 79
6.2.2.5. Modification of MWNTs and attachment of AuNPs 79
6.2.2.6. Preparation of PMBA-MWNT nanocomposites 80
6.2.2.7. Characterization techniques 81
6.3. Results and Discussion 82
6.3.1. Modification of purified MWNTs 82
6.3.2. Morphologies of the prepared hybrids 83
6.3.3. Thermal stability of the hybrids 86
6.3.4. Morphologies of AuNPs attached polymer modified MWNTs 87
6.3.5. Stability of the hybrids in distilled water 89
Conclusions 91
Bibliography 91
Chapter 7. Immobilization of Mn doped ZnS quantum dots on surface functionalized multi-walled carbon nanotubes: studies on their optical properties 95
7.1. Introduction 96
7.2. Experimental Procedures 98
7.2.1. Materials 98
7.2.2. Synthesis of the Mn doped ZnS Quantum Dots 99
7.2.3. Coupling of Mn doped ZnS QDs to functionalized MWNTs 99
7.2.4. Characterization techniques 100
7.3. Results and discussion 100
Conclusion 108
Bibliography 109
Chapter 8. Fabrication of conducting polyaniline-multiwalled carbon nanotube nanocomposites and their use as templates for loading gold nanoparticles 112
8.1. Introduction 113
8.2. Experimental Methods 116
8.2.1. Materials 116
8.2.2. Synthesis and characterization 116
8.2.2.1. Purification and mild acid oxidation of MWNTs 116
8.2.2.2. Acylation of MWNTs 117
8.2.2.3. Synthesis of PANI-f-MWNTs 117
8.2.2.4. Preparation of gold colloidal solution 118
8.2.2.5. Characterization techniques 118
8.3. Results and Discussion 119
8.3.1. Structural and morphological aspects of oxidized MWNTs 120
8.3.2. FT-IR spectroscopic studies of the hybrids 122
8.3.3. Morphologies of the prepared hybrids 123
8.3.4. Thermal stability 127
8.3.5. Morphologies of AuNPs attached polymer modified MWNTs 129
Conclusions 131
Bibliography 132
Chapter 9. Covalent surface functionalization of graphene nanosheets with novel conjugated polymer poly(3,4-propylenedioxythiophene) 135
9.1. Introduction 136
9.2. Materials and methods 139
9.2.1. Materials 139
9.2.2. Synthesis and characterization 139
9.2.2.1. Synthesis of graphene oxide 139
9.2.2.2. Synthesis of ProDOT-OH monomer 139
9.2.2.3. Covalent functionalization of GNS with monomer 140
9.2.2.4. Polymerization of GNS-f-ProDOT-OH (GNS-f-PProDOT) 140
9.2.2.5. Preparation of co-polymers of GNS-f-ProDOT-OH 141
9.2.2.6. Characterization techniques 141
9.3. Results and discussion 142
9.3.2. Structure and morphologies of the prepared hybrids 146
9.3.3. Thermal stability of the hybrids 152
Conclusions 154
Bibliography 155
Summary and Outlook 158
List of Publications 160
- Degree
- Doctor
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