The ornamental design for an atomizer of electroniccigarette, as shown and described.
FIG. 1 is a front elevational view of an atomizer of electronic cigarette;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a perspective view thereof; and,
FIG. 8 is a bottom perspective view thereof.
The broken line showing in the figures is included for the purpose of illustrating portions of the atomizer of electronic cigarette and forms no part of the claimed design.