Patent ID: 7829844

Claim:
A substrate for mass spectrometry, comprising: a base; a mesoporous silica film formed on the base; and an inorganic material film formed on the mesoporous silica film, wherein the inorganic material film has a plurality of concaves formed vertically to the base, the diameter of the concaves being not less than 1 nm and less than 1 μm, wherein the mesoporous silica film has a flat surface and a two-dimensional hexagonal structure formed by honeycomb packing of tubular pores, wherein the mesoporous silica film gives at least one diffraction peak in an X-ray diffraction profile in an angular region corresponding to a recurrent structure of not less than 1 nm, and wherein the tubular pores are formed from clusters of surfactant molecules serving as a template, and the pores have a substantially uniform pore size.