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Micro and Nano Systems Letters
Fig. 1 | Micro and Nano Systems Letters

Fig. 1

From: Folding-paper-based preconcentrator for low dispersion of preconcentration plug

Fig. 1

Device schematic and optical images. a Scheme of 3D paper-based ICP preconcentrator. The top layer is a double-sided adhesive tape for paper folding, and the middle layer comprises the hydrophobic wax (black area) and cellulose paper (white area). The bottom layer is Nafion patterned on the adhesive tape for ICP phenomena. b The optical images. The top and middle images are placed on the upper and lower sides of the folding device, respectively. The bottom image is placed on the unfolding device

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