Effect of seeded substrates on hydrothermally grown ZnO nanorods
Effect of seeded substrates on hydrothermally grown ZnO nanorods
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DOI：
10.1007/s10971-009-1917-2
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发表时间：
2009-06-01
影响因子：
2.5
通讯作者：
Dutta, Joydeep
中科院分区：
文献类型：
--
作者：
Baruah, Sunandan;Dutta, Joydeep
我们报告了一项研究，在玻璃衬底上接种氧化锌纳米晶体对从硝酸锌六水合物和六亚甲基四胺溶液在95摄氏度的ZnO纳米棒的水热生长的影响。在异丙醇中用直径约6-7 nm的预合成的ZnO纳米颗粒进行接种，以及通过预沉积的乙酸锌膜的水解在衬底上直接生长ZnO纳米晶体。在ZnO纳米粒子种子上生长的纳米棒在整个衬底上显示出均匀的尺寸，但并不均匀地从衬底垂直对齐，并且看起来像具有纳米棒花瓣的纳米花。从在衬底上原位形成的微晶生长的纳米棒显示出取决于预热和退火条件的尺寸的广泛变化。退火低于350摄氏度的晶种导致分散的生长方向，从而观察到垂直于衬底的纳米棒的优先取向。通过这种简单的纳米棒的水热生长可以实现对于气体传感应用至关重要的高表面体积比，并且可以通过生长参数来控制棒的高度和棒的形态。
We report a study on the effect of seeding on glass substrates with zinc oxide nanocrystallites towards the hydrothermal growth of ZnO nanorods from a zinc nitrate hexahydrate and hexamethylenetetramine solution at 95 A degrees C. The seeding was done with pre-synthesized ZnO nanoparticles in isopropanol with diameters of about 6-7 nm as well as the direct growth of ZnO nanocrystallites on the substrates by the hydrolysis of pre-deposited zinc acetate film. The nanorods grown on ZnO nanoparticle seeds show uniform dimensions throughout the substrate but were not homogenously aligned vertically from the substrate and appeared like nanoflowers with nanorod petals. Nanorods grown from the crystallites formed in situ on the substrates displayed wide variations in dimension depending upon the preheating and annealing conditions. Annealing the seed crystals below 350 A degrees C led to scattered growth directions whereupon preferential orientation of the nanorods perpendicular to the substrates was observed. High surface to volume ratio which is vital for gas sensing applications can be achieved by this simple hydrothermal growth of nanorods and the rod height and rod morphology can be controlled through the growth parameters.