A fiber cleaver is provided which is capable of cleaving a glass fiber portion in a short time without depending on a particular working environment. These mesoporous silica particles are prepared using a phosphoric acid-based cosurfactant for stabilizing the surface of the particles to prevent the aggregation thereof, thereby uniformly distributing the particles. The field application may additionally or alternatively control the diffusion of the charged species in a direction perpendicular to a plane formed by the photoresist layer.