Kumari Latha, Li W Z, Kulkarni Shrinivas, Wu K H, Chen Wei, Wang Chunlei, Vannoy Charles H, Leblanc Roger M
Nanoscale Res Lett. 2009 Oct 13;5(1):149-157. doi: 10.1007/s11671-009-9457-9.
Magnesium borate hydroxide (MBH) nanowhiskers were synthesized using a one step hydrothermal process with different surfactants. The effect surfactants have on the structure and morphology of the MBH nanowhiskers has been investigated. The X-ray diffraction profile confirms that the as-synthesized material is of single phase, monoclinic MgBO(2)(OH). The variations in the size and shape of the different MBH nanowhiskers have been discussed based on the surface morphology analysis. The annealing of MBH nanowhiskers at 500 degrees C for 4 h has significant effect on the crystal structure and surface morphology. The UV-vis absorption spectra of the MBH nanowhiskers synthesized with and without surfactants show enhanced absorption in the low-wavelength region, and their optical band gaps were estimated from the optical band edge plots. The photoluminescence spectra of the MBH nanowhiskers produced with and without surfactants show broad emission band with the peak maximum at around 400 nm, which confirms the dominant contribution from the surface defect states.
使用一步水热法并添加不同表面活性剂合成了硼酸氢氧化镁（MBH）纳米晶须。研究了表面活性剂对MBH纳米晶须结构和形态的影响。X射线衍射图谱证实，合成的材料为单相单斜晶系的MgBO(2)(OH)。基于表面形态分析讨论了不同MBH纳米晶须尺寸和形状的变化。MBH纳米晶须在500℃下退火4小时对晶体结构和表面形态有显著影响。添加和未添加表面活性剂合成的MBH纳米晶须的紫外可见吸收光谱在低波长区域显示出增强的吸收，并且从光学带边缘图估计了它们的光学带隙。添加和未添加表面活性剂制备的MBH纳米晶须的光致发光光谱显示出宽发射带，峰值最大值在400nm左右，这证实了表面缺陷态的主要贡献。
