运用胶体化学法在乙醇介质中合成SiO2胶体球,将制得的样品在30℃下用双氧水浸泡处理48h.用扫描电子显微镜(SEM)、傅立叶红外光谱(FT-TR)、Zeta电位仪和标准氢氧化钠滴定法对其形貌、结构和表面电学性质进行分析.结果表明样品平均粒径为292nm,平均标准偏差小于5%;经双氧水浸泡处理后,SiO2胶体球表面羟基数目增多,在水溶液中的Zeta电位从-55.72mV提高到-63.26mV,表面电荷密度从0.19μC/cm2提高到0.28μC/cm2.通过垂直沉积法,在40℃和60%相对湿度条件下制备出有序性较好、密排结构的SiO2胶体晶体.在SEM下,观察到这种胶体晶体是面心立方(fcc)密排结构,其(111)晶面平行于基底.透射光谱表明,所制备的胶体晶体在(111)方向具有光子晶体的不完全带隙性质.
参考文献
| [1] | Joannopoulos J D;Villeneuve P R;Fan S .Photonic crystals:Putting a new twist on light[J].Nature,1997,386(6621):143-149. |
| [2] | Painter O;Lee R K;Scherer A et al.Two-dimensional photonic band-gap defect mode laser[J].Science,1999,284(5421):1819-1821. |
| [3] | V. Berger .Photonic crystals and photonic structures[J].Current opinion in solid state & materials science,1999(2):209-216. |
| [4] | 郭红霞,范吉军,赵晓鹏.光子晶体及其制备方法研究进展[J].功能材料,2003(01):5-8. |
| [5] | 快素兰,章俞之,胡行方.二氧化硅胶体晶体的制备及其光子带隙特性[J].无机材料学报,2002(01):159-162. |
| [6] | Reese CE.;Weissman JM.;Lee K.;Asher SA.;Guerrero CD. .Synthesis of highly charged, monodisperse polystyrene colloidal particles for the fabrication of photonic crystals[J].Journal of Colloid and Interface Science,2000(1):76-80. |
| [7] | 李明海,马懿,徐岭,张宇,马飞,黄信凡,陈坤基.二氧化硅人工蛋白石晶体（opal）的制备及其结构性质的研究[J].物理学报,2003(05):1302-1306. |
| [8] | 黄忠兵,高继宁,汪静,唐芳琼,袁春伟.改性聚苯乙烯微球的制备及其胶体晶体的组装[J].物理化学学报,2004(06):651-655. |
| [9] | Wei Wang;Baohua Gu;Liyuan Liang et al.Fabrication of two-and three-dimensional silica nanocolloidal particle arrays[J].Journal of Physical Chemistry B,2003,107:3400-3404. |
| [10] | Stober W;Fink A .Controlled growth of monodisperse silica spheres in the micron size range[J].Journal of Colloid and Interface Science,1968,26:62-69. |
| [11] | Roberts JM.;Osteryoung JG.;Linse P. .Voltammetric studies of counterion diffusion in the monodisperse sulfonated polystyrene latex[J].Langmuir: The ACS Journal of Surfaces and Colloids,1998(1):204-213. |
| [12] | Masahiko Ishii;Hiroshi Nakamura;Hideyuki Nakano;Azusa Tsukigase;Masashi Harada .Large-Domain Colloidal Crystal Films Fabricated Using a Fluidic Cell[J].Langmuir: The ACS Journal of Surfaces and Colloids,2005(12):5367-5371. |
| [13] | Woodcock L V .Entropy difference between the face centred cubic packed and hexagonal closed packed crystal structure[J].Nature,1997,385:141-143. |
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