中文摘要：

本文通过水热法合成了Au和Au/Au同质结纳米粒子,并用透射电子显微镜（TEM）和紫外可见吸收（UV-vis）光谱对所合成的单分散Au纳米粒子和Au/Au同质结纳米粒子进行了表征。我们的研究发现,十六烷基三甲基溴化铵（CTAB）在Au/Au同质结纳米粒子的合成中起着非常重要的作用,改变CTAB的加入量,Au纳米粒子由单分散Au纳米粒子变成Au/Au同质结纳米粒子。

英文摘要：

In this paper, Au and Au/Au homojunctJon nanoparticles were synthesized by hydrothermal method, which were characterized by transmission electron microscopy （TEM） and ultraviolet-visible absorption spectrum （UV-vis）. Our study indicated that eetyltrimethylammonium bromide （CTAB） played an important role in the synthesis of the Au/Au homojunction nanoparticles and monodisperse Au nanoparticles would transfer into Au/Au homojunction nanoparticles if the CTAB concentration was modified.