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A modified introduction device and a preconcentration method were developed to enhance the sensitivity of the Hg isotopic analysis method.

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Mechanical instabilities of periodic soft nanostructures and their interaction with the deformation of a base could lead to collective buckling. Our theoretical calculations suggest multiple modes of buckling associated with distinctive potential energies. This theoretical discovery allowed us to selectively promote certain buckling modes through experiments as an unusual approach for nanolithography. One typical example includes reducing the feature size in a selectively buckled grating from a pitch of 200 to 130 nm.

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