Customized lithographic particles

A method of producing particles, comprising:

• providing a substrate structure comprising a solid substrate;
• forming a target structure on said substrate structure, said target structure comprising a radiation-reactive material;
• forming a spatially patterned beam of radiation using a patterned mask;
• exposing at least a portion of said target structure to said spatially patterned beam of radiation to which said radiation-reactive material reacts while leaving other portions of said target structure unexposed to said spatially patterned beam of radiation;
• removing substantially all of one of the exposed or the unexposed patterned portions of said target structure to provide a plurality of non-contiguous structures that include at least a portion of said radiation-reactive material;
• separating the plurality of non-contiguous structures comprising said radiation-reactive material from said substrate structure into a fluid material;
• and
• prior to said separating the plurality of non-contiguous structures:
• depositing a second target structure comprising a radiation-reactive material on the first-mentioned target structure after said exposing at least a portion of the first-mentioned target structure to said spatially patterned beam of radiation;
• forming a second spatially patterned beam of radiation using a patterned mask so that it is in a substantially predetermined aligned position relative to said exposed portion of the first-mentioned target structure;
• exposing at least a portion of said second target structure to said second spatially patterned beam of radiation while leaving other portions of said second target structure unexposed to said second spatially patterned beam of radiation;
• and
• removing substantially all of one of the exposed or the unexposed patterned portions of the second target structure to provide said plurality of non-contiguous structures,
• wherein each said non-contiguous structure of said radiation-reactive material provides at least a portion of a separate particle after said separation.