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Electrical, Magnetic, and Optical Properties in Highordered Nanoparticle Supercrystals

Electrical, Magnetic, and Optical Properties in Highordered Nanoparticle Supercrystals
Translated Title
나노 입자를 이용한 초결정(Supercrystal)의 전기적, 광학적, 전자기적 특성 연구
Kim, Se Jin
DGIST Authors
Kim, Se Jin; Lee, Jong SooHong, Jung Il
Lee, Jong Soo
Hong, Jung Il
Issue Date
Available Date
Degree Date
2014. 2
colloidal nanoparticlesnanoparticle superlatticessupercrystals콜로이드 나노입자나노입자 초결정
Recently, about nanoparticle research, control and applications of materials’ properties have been studied actively with developing synthesis skill and systematic advances such as controllable nanoparticles’ shapes, growth mechanism, monodispersity, and stoichiometry. However, the most established one was limited singular nanoparticle property research only and simple nanoparticles spread on the substrates. Here, we will introduce the new concept of materials or elements which show different properties from individuals using superlattices; periodically stacked or assembled by monodiserse nanoparticles. Each electrical, magnetic and optical properties was measured using PbS, CoFe2O4, and CdSe nanoparticles made by hot-injection method. In this paper, we will show results of the artificial 3D nano-structures self-assemble structure, which can be controlled by solvent evaporation ratio, surface control of nanoparticles, and so on. Also, we have studied the effect of nanoparticles’ stoichiometry, size, and shape for superlattice growth, and compared electrical, magnetic, and optical properties of superlattices with one of individual. ⓒ 2014 DGIST
Table Of Contents
1. Introduction 1 -- 2. Experiments 5 -- 2.1. Synthesis method of CoFe2O4 nanoparticles 5 -- 2.2. Synthesis method of Fe3O4 nanoparticles 5 -- 2.3. Synthesis method of ZnFe2O4 nanoparticles 5 -- 2.4. Synthesis method of Co nanoparticles 6 -- 2.5. Synthesis method of PbS nanoparticles 6 -- 2.6. Synthesis method of Fe3O4 colloidal nanocrystal clusters 6 -- 2.7. Synthesis method of CdSe@CdS (core@shell) nanoparticles 7 -- 2.8. Superlattice growth method 7 -- 2.9. Supercrystal growth method 8 -- 2.10. Characterization techniques used in this work 8 -- 3. Results & Discussion 10 -- 3.1. Magnetic nanoparticle synthesis & characterization 10 -- 3.2. Semiconductor nanoparticle synthesis & characterization 15 -- 3.3. Superlattice & Supercrystal characterization 17 -- 3.4. Electrical properties of supercrystal 24 -- 3.5. Magnetic properties of supercrystal 28 -- 3.6. Optical properties of supercrystal 32 -- 4. Summary & conclusion 34 -- References 35
Energy Systems Engineering
Related Researcher
  • Author Lee, Jong Soo MNEDL(Multifunctional Nanomaterials & Energy Devices Lab)
  • Research Interests Design of new type of multifunctional nanoparticles for energy-related devices; 다기능성 나노재료; 무기물 태양전지; 열전소자
Department of Energy Science and EngineeringThesesMaster

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