Lou Zhichao, Zhang Xiaohong, Zhang Haiqian
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, PR China.
J Nanosci Nanotechnol. 2012 Apr;12(4):3142-9. doi: 10.1166/jnn.2012.5839.
An original solution phase approach was developed for the synthesis of single-crystal Au nanoprims with anisotropic structure of triangular, hexagonal and truncated triangular, nanometre or micrometer scale, and nanometer thickness. It has been confirmed that the Fe3O4 magnetite nanoparticles and (3-aminopropyl) triethoxysilane (APTES) coated on the magnetite nanoparticles play important roles in the formation of Au nanoplates. Significantly, such Au nanoplates exhibit remarkable optical properties, both the dipole plasmon resonance and the quadrupole plasmon resonance were observed. And the selected area electron diffraction (SAED) pattern shows the nanoplates obtained were single crystals with (111) plans as two basal surfaces. The growth of gold nanoplates in the solution with time had been monitored by microscopic and spectroscopic techniques to allow the detection of several key intermediates in the growth process. To our knowledge, this is the first report on the production of large planar gold nanostructures with gamma irradiation in combination of another nanocomposite materials (APTES-Fe3O4).
开发了一种原始的溶液相方法来合成具有三角形、六边形和截顶三角形等各向异性结构的单晶金纳米棱柱，其尺寸为纳米或微米级，厚度为纳米级。已经证实，Fe3O4磁铁矿纳米颗粒以及包覆在磁铁矿纳米颗粒上的（3-氨丙基）三乙氧基硅烷（APTES）在金纳米板的形成中起重要作用。值得注意的是，这种金纳米板表现出显著的光学性质，同时观察到了偶极子等离子体共振和四极子等离子体共振。选区电子衍射（SAED）图案表明，所获得的纳米板是具有（111）面作为两个基面的单晶。通过显微镜和光谱技术监测了溶液中金纳米板随时间的生长情况，以便检测生长过程中的几个关键中间体。据我们所知，这是关于结合另一种纳米复合材料（APTES-Fe3O4）通过γ辐射制备大型平面金纳米结构的首次报道。
