A method is provided for constructing a nanodevice. The method includes: fabricating an electrode on a substrate; forming a nanogap across the electrode; dispersing a plurality of nanoobjects onto the substrate using electrophoresis; and pushing one of the nanoobjects onto the electrode using a tip of an atomic force microscope, such that the nanoobject lies across the nanogap formed in the electrode. In addition, remaining nanoobjects may also be pushed away from the electrode using the atomic force microscope, thereby completing construction of a nanodevice.