The first set of particles are made of titanium nitrate.

第一组颗粒是由硝酸钛制成的。

Nanoparticles of titanium nitrate, on the other hand, are easily and cheaply produced by spraying the right mix of precursor chemicals into a flame.

另一方面，通过向火焰中喷洒合适的前体化学物质混合物，可以轻松生产出硝酸钛纳米颗粒，成本也很低。