Super-smooth structure and preparation method thereof

The invention provides a super-smooth structure and a preparation method thereof.The preparation method of the super-smooth structure comprises the steps that a super-smooth island and a first substrate are provided, then, a sliding block in the super-smooth island is transferred to the upper surface of the first substrate along a super-smooth interface, and finally, the resistance value of the sliding block on the first substrate is measured; and screening out the sliding blocks of which the resistance values meet a target threshold value, and obtaining the super-smooth structure. According to the method, the resistance values of the sliding blocks are measured, and the sliding blocks with the resistance values smaller than the target threshold value are screened according to the measurement result, so that the sliding blocks without partial super-sliding surfaces are obtained. The characteristic that the sliding block without a part of the super-smooth surface has more excellent structural stability is util