Conductive two-dimensional particle and method for producing the same

A conductive two-dimensional particle of a layered material comprising one layer or one layer and plural layers, wherein the layer includes a layer body represented by:

• MmXn
• wherein M is at least one metal of Group 3, 4, 5, 6, or 7,
• X is a carbon atom, a nitrogen atom, or a combination thereof,
• n is 1 to 4, and
• m is more than n and 5 or less, and
• a modifier or terminal T existing on a surface of the layer body,
• wherein T is at least one selected from the group consisting of a hydroxyl group, a fluorine atom, a chlorine atom, an oxygen atom, or a hydrogen atom;
• a monovalent metal ion;
• and
• an organic compound having a Hildebrand dissolution parameter of 19.0 MPa1/2 to 47.8 MPa1/2,
• wherein
• the conductive two-dimensional particle does not contain an amine,
• a total content of chlorine and bromine in the conductive two-dimensional particle is 1,500 ppm by mass or less, and
• an average value of a major diameter of a two-dimensional surface of the conductive two-dimensional particle is 1.0 μm to 20 μm.