Patent ID: 7545010

Claim:
A catalytic structure comprising: a substrate or a substrate having an underlayer; and a structure formed on the substrate or the underlayer, wherein the structure includes: a columnar first part having a plurality of spaced columns, and a second part formed to surround the columns of the first part, the second part includes two or more types of materials that form a eutectic material, in which one or more of the two or more types of materials is a semiconductor material, and in which the eutectic material has a eutectic point of about 300° or greater, the first part exhibits catalytic activity and does not include Si, a height of the first part as measured from the substrate is greater than a height of the second part as measured from the substrate or the underlayer, and a distance between centers of each pair of adjacent columns is in a range of 5 nm to 20 nm.