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The process of APTMS monolayer grown on PDMS, and the absorption of Au particles by APTMS in aqueous Au colloidal solution.
Schematic illustration of the process for transferring a nanoparticle monolayer from the water surface to a PDMS substrate.
SEM images of 2D Au nanoparticle array (a) the sample was prepared by the chemical absorbing process. (b) The sample was prepared by microcontact printing of uniform nanoparticle arrays.
The absorption spectra vs the expansion of PDMS film (a) Sample was prepared by the chemical absorbing process, and (b) The sample was prepared by microcontact printing of uniform nanoparticle arrays. The nonexpended size of the samples is .
Exponential dependence of the resonance peak position on the array spacing ratio . The straight line is theoretical prediction. The dotted and dashed lines are the experimental data obtained from Figs. 2(a) and 2(b), respectively. The array spacing is the distance between the centers of the first nearest-neighbor particles. We specify in terms of its ratio to the sphere diameter that is .
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