明胶溶液中针状纳米HgS的仿生合成

Biomimetic Synthesis of Acicular Nanometer HgS in the Gelatin Solution

以明胶为模板剂,制备出在明胶水溶液中稳定存在的HgS微晶.通过扫描电镜(SEM)图像表明,生长时间为2d的样品为微晶结构,生长15d的HgS微晶为针状,平均直径约87nm,长度约1.3μm.紫外可见吸收和荧光光谱的测试结果表明,所合成HgS具有量子限域效应.明胶分子的构象变化对HgS纳米颗粒的成核和形貌转化起到非常重要的作用.

HgS acicular nanocrystals conjugated with gelatin were successfully synthesized in aqueous solution of gelatin at room temperature. SEM images showed that when the reaction time reached 2 d, the particles of HgS was formed while the reaction time reached 15 d, the particles turned into the acicular nanoparticles. The average diameter of the acicular nanoparticles was 87 nm with the length of 1,3 μm, The quantum-confined effect of the HgS nanoparticles was confirmed by the ultraviolet-visible and fluorescence spectrum, The results indicate that the change of gelatin conformation not only induce the nucleation, but is favorable to the pattern change of HgS nanoparticles,