周必泰臺灣大學：化學研究所謝嘉銘Hsieh, Chia-MingChia-MingHsieh2007-11-262018-07-102007-11-262018-07-102007http://ntur.lib.ntu.edu.tw//handle/246246/51744我們利用一鍋反應,合成出高品質的奈米晶體,並將其表面化學置換,接上有用的過渡金屬,當做單態氧的敏化劑,用在生物方面,可以得到高密度的氧氣及II-VI族奈米晶體的放光.We have prepared CdSe/ZnX (X= S, Se) quantum dots from the CdO precursor through a convenient, one-pot approach to maintain simplicity and green chemistry.39 Various characterization experiments provide unambiguous evidence for the core/shell nanoparticles formation. The feasibility of synthesizing tunable-size core/shell quantum dots may be considered an advantage, although the growing mechanism seems relatively complicated, as it may simultaneous incorporate the growth of core and the shell passivation. Nevertheless, the synthetic scheme described here optimized and finely controlled the defocusing stage, so that high-quality core/shell CdSe/ZnX quantum dots can be prepared in a one-pot synthesis.Table of Contents 摘要………………………………………………………………………….3 Chapter 1. General review…………………………………………………..8 1.1. Theoretical considerations of bulk and nanocrystalline semiconductors .... 11 1.1.1. Bulk semiconductors ...………………………………………………. 11 1.1.2. Nanocrystalline semiconductors ……………………………………... 12 1.2. Optical properties of nano-size semiconductor ………………………….. 15 1.3. Semiconductor quantum dots as biological imaging agents ……………... 17 1.4. Exceptional surface modification of quantum dots ………………………. 31 1.5. Other application of semiconductor quantum dots ……………………….. 36 References ...………………………………………… ……………………….. 38 Chapter 2. Synthesis of Type-I CdSe/ZnS (ZnSe) Core-Shell Quantum Dots 40 2.1. Background …………………………………………………………….… 43 2.1.1. Surface passivation ...…………………………………...……………. 43 2.1.2. Protective types core/shell structure …...……..………...……………. 43 2.2. Review of synthetic strategies for colloid semiconductor QDs ………….. 45 2.2.1. Synthesis of CdX (X=S, Se, Te) nanoparticles in organic phase .....… 48 2.2.2. Synthesis of CdX (X=S, Se, Te) nanoparticles from water phase ....... 49 2.2.3. Synthesis of core-shell type nanoparticles from organic phase ……... 52 2.2.4. Synthesis of core-shell type nanoparticles from water phase ……...... 54 2.3. One-pot synthesis of high quality QDs via CdO precursor ...…………...... 54 2.4. Experimental section ……………………………………………………... 54 2.4.1. Chemicals ……………………………………………………………. 56 2.4.2. Method 1-tunable size ……………………………………………….. 57 2.4.3. Method 2-unique size ………………………………………………... 58 2.5. Results and discussion ……………………………………………………. 59 2.5.1. Reaction parameters …………………………………………………. 59 2.5.2. Products characterization ……………………………………………. 64 2.5.3. Comparing current methods …………………………………………. 67 2.6. Conclusions …………………………………………………………….....69 References…………………………………………… ……………………….. 70 Chapter 3. Iridium-complex modified CdSe/ZnS quantum dots; a conceptual design for bifunctionality toward imaging and photosensitization ……………………………..……......... 75 3.1. Background …………………………………………………………….… 75 3.2. Experimental section ……………………………………………………... 76 3.2.1. Chemicals / Synthetic procedure/ Measurement … …………………………………………………………76 3.3. Results and discussion ………………………………...………………….. 80 3.4. Conclusions ……………………………..………………………………... 82 References ...………………………………………… ……………………….. 84 Chapter 4. Functionalization of Single 15-Crown-5 Capped Au Nanoparticles from Silica Nanosphere; Its Application in Potassium Ion Recognition ……………………………..……......... 87 4.1. Background …………………………………………………………….… 87 4.2. Experimental section ……………………………………………………... 89 4.2.1. Chemicals / Synthetic procedure/ Measurement … …………………………………………………………89 4.3. Results and discussion ………………………………...………………….. 91 4.4. Conclusions ……………………………..………………………………... 99 References參考文獻 ...………………………………………… ……………………….. 98en-US奈米粒子nanoparticlethesis