工学硕士学位论文
水相合成发光CdS和CdTe/CdS核壳结构量子点
WATER-PHASE SYNTHESIS OF LUMINESCENT CdS AND CdTe/CdS CORE-SHELL QUANTUM DOTS
摘 要
ABSTRACT
ACKNOWLEDGEMENTS
CONTENTS
LIST OF TABLES
LIST OF FIGURES
INTRODUCTION
1.1 About nanoparticles
1.1.1 Characteristics of nanoparticles
1.1.2 Surface effect
1.1.3 Optical properties
1.1.4 Nanoparticle suspension and kinetic properties
1.2 Application of nanoparticles
1.2.1 Photonic application of nanoparticles
1.2.2 Semiconductor nanoparticles in the biomedical research
1.3 Synthesis method of nanoparticles
1.3.1 Synthesis methods of nanoparticles
1.4 Research of CdS and CdTe/CdS core/shell nanocrastal
1.5 Common methods of nanoparticles characterization
1.6 Significance of subjects
1.7 Main work
EXPERIMENTAL PROCEDURE
2.1 Preparation of CdS quantum dots
2.1.1 Chemical reagent and apparatus
2.1.2 Experimental conditions and parameters
2.1.3 Ratio of reactants without deoxidization
2.2 Preparation of CdTe/CdS core-shell nanocrytals
2.2.1 Experiment of CdTe/CdS core shell quantum dots
2.3 Characterization of nanoparticles
2.3.1 Black light qualitative analysis
2.3.2 FT-IR analysis
2.3.3 Raman analysis
2.3.4 Ultraviolet - Visible Spectrophotometer analysis
2.3.5 Fluorescence spectrophotometer
RESULTS AND DISCUSSION
3.1 Effect of synthesis conditions on the size of CdS quantum dots
3.1.1 Effect of the ratio of precursor and the stabilizer concentration
3.1.2 Effect of protection of nitrogen deoxidization and pH
3.1.3 Effect of Na2S
3.1.4 Effect of reaction time
3.1.5 Stability of CdS quantum dots
3.2 Effect of synthesis conditions on CdTe/CdS core/shell quantum dots
3.2.1 Comparison of fluorescence spectra of CdTe and CdTe/CdS
3.2.2 Effect of Cd2+ concentration on emission spectra of CdTe/CdS
3.2.3 Effect of pH on the emission spectra of CdTe/CdS
3.2.4 Stability of CdTe/CdS
CONCLUSIONS
4.1 Summary
4.2 Works in the future
REFERENCES
哈尔滨工业大学硕士学位论文原创性声明
哈尔滨工业大学硕士学位论文使用授权书