Closed-cell metal oxide particles

Closed-cell metal oxide particles and methods of making the same are disclosed in certain embodiments. In at least one embodiment, a closed-cell metal oxide particle includes a metal oxide matrix defining a closed-cell array. Each closed cell encapsulates the medium without entering the void volume. The outer surfaces of the closed-cell metal oxide particles are defined by the closed-cell array. 在某些实施例中公开了闭孔金属氧化物颗粒及其制备方法。在至少一个实施例中，闭孔金属氧化物颗粒包含限定闭孔阵列的金属氧化物基质。每个闭孔包封介质不可入空隙体积。所述闭孔金属氧化物颗粒的外表面由所述闭孔阵列限定。