| 摘要 |
<p>The present invention relates to a particle having a core and a shell, said core being hollow or comprising an organic polymer composition and said shell comprising an inorganic oxide. The shell has a thickness in the range from 2 to 75 nm and has at least one and no more than five enlarged pores, each enlarged pore having a diameter of between 5 nm and 300 nm.</p> |
