| Preparation of modified SiO2 colloidal spheres with succinic acid and the assembly of colloidal crystals |
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| 引用本文： | FANG Jun WANG XiuFeng WANG LieSong CHENG Bing WU Yuan-Ting ZHU WanLin. Preparation of modified SiO2 colloidal spheres with succinic acid and the assembly of colloidal crystals[J]. 科学通报(英文版), 2007, 52(4): 461-466. DOI: 10.1007/s11434-007-0091-6 |
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| 作者姓名： | FANG Jun WANG XiuFeng WANG LieSong CHENG Bing WU Yuan-Ting ZHU WanLin |
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| 作者单位： | School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi＇an 712081, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China （Grant No. 50372038） |
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| 摘 要： | SiO2 colloidal spheres were synthesized by St-ber method. In order to enhance surface charge of the SiO2 spheres, they were modified with succinic acid. Scanning electron microscope (SEM) shows that the average size of modified SiO2 spheres is 473 nm, and its distribution standard deviation is less than 5%; Fourier-transform infrared spectra (FT-IR) and X-ray photoelectron spectrometer (XPS) results indicate that one end of succinic acid is chemically bonded to the SiO2 spheres through esterification; Zeta potential of the modified SiO2 spheres in water solution is improved from -53.72 to -67.46 mV, and surface charge density of the modified SiO2 spheres is enhanced from 0.19 to 0.94 μC/cm2. SiO2 colloidal crystal was fabricated from aqueous colloidal solution by the vertical deposition method at 40℃ and 60% relative humidity. SEM images show that the sample of SiO2 colloidal crystal is face-centered cubic (fcc) structure with its (111) planes parallel to the substrate. Transmission measurement shows the existence of photonic band gap at 1047 nm.
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| 关 键 词： | 琥珀酸 二氧化硅胶质球 胶质晶体 光学晶体 制备 表面电荷密度 |
| 收稿时间： | 2006-07-13 |
| 修稿时间： | 2006-07-132006-11-11 |
Preparation of modified SiO2 colloidal spheres with succinic acid and the assembly of colloidal crystals |
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| Fang Jun,Wang XiuFeng,Wang LieSong,Cheng Bing,Wu YuanTing,Zhu WanLin. Preparation of modified SiO2 colloidal spheres with succinic acid and the assembly of colloidal crystals[J]. Chinese science bulletin, 2007, 52(4): 461-466. DOI: 10.1007/s11434-007-0091-6 |
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| Authors: | Fang Jun Wang XiuFeng Wang LieSong Cheng Bing Wu YuanTing Zhu WanLin |
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| Affiliation: | (1) School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi’an, 712081, China |
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| Abstract: | SiO2 colloidal spheres were synthesized by Stöber method. In order to enhance surface charge of the SiO2 spheres, they were modified with succinic acid. Scanning electron microscope (SEM) shows that the average size of modified SiO2 spheres is 473 nm, and its distribution standard deviation is less than 5%; Fourier-transform infrared spectra (FT-IR) and X-ray photoelectron spectrometer (XPS) results indicate that one end of succinic acid is chemically bonded to the SiO2 spheres through esterification; Zeta potential of the modified SiO2 spheres in water solution is improved from -53.72 to -67.46 mV, and surface charge density of the modified SiO2 spheres is enhanced from 0.19 to 0.94 μC/cm2. SiO2 colloidal crystal was fabricated from aqueous colloidal solution by the vertical deposition method at 40℃ and 60% relative humidity. SEM images show that the sample of SiO2 colloidal crystal is face-centered cubic (fcc) structure with its (111) planes parallel to the substrate. Transmission measurement shows the existence of photonic band gap at 1047 nm. |
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| Keywords: | photonic crystals colloidal crystals vertical deposition method SiO2 colloidal spheres surface charge density |
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