Filled Microcavity Arrays Produced by Polyelectrolyte Multilayer Membrane Transfer

Arrays of microcavities sealed by a semipermeable ultrathin polyelectrolyte multilayer membrane (see Figure) are prepared using a novel method. The cavities can be loaded with high-molecular-weight species. If the entrapped molecules have stimuli-responsive properties, such structures can be potentially used as sensor arrays to probe, e.g., solution properties, as demonstrated in model experiments.