Hollow spheres are becoming one of the focuses of new materials research because of its low density,high specific surface areas and infiltration ability. In this dissertation, high monodispersed Co@SiO2 core shell nanoparticles were prepared by sol-gel method.
另外,核壳结构粒子通过溶解或煅烧方法可以去掉内核形成中空的纳/微球,由于空心球密度小、比表面积大及好的渗透特性也成为科学家关注的焦点。
参考来源 - 二氧化硅核壳结构及无机氧化物空心球的构筑·2,447,543篇论文数据，部分数据来源于NoteExpress
Not recommended for interior use on large surface areas.
不宜在表面积大的区域内部使用。
Proportion is also relative sizes of surface areas of different colors in a room.
比例也与房间里不同颜色的面积大小有关。
Carbon nanotubes have advantages: they're strong, conductive, and have large surface areas.
碳纳米管有很多优点：强度高、可导电、并有巨大的表面积。
They can develop as flat, discolored areas of skin or as raised growths, often with a rough surface.
VOA: special.2010.07.06
The areas the printmaker cut away will be lower on the surface of the wood.
VOA: special.2009.09.02
Scientists measure solar activity by counting dark areas on the sun's surface.
VOA: special.2009.09.29
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