Disclosed herein are methods for assembling nanostructures. A first rubbing direction of the first alignment film is a direction which crosses the third direction at an acute angle, and an angle formed between the first rubbing direction and the third direction is 3. The stretching section defines an elongate channel, which makes the contact have a preferred flexibility and an improved capability. In other versions, the openings are placed within the base in patterns similar to the pattern of the cup holding elongated members, with the patterns being spaced apart from one another. The first contact element is movable relative to the at least one clamping element.