An approach is presented for designing a polymeric layer for nanometer scale thermo-mechanical storage devices. Preferably, the liquid sample includes a matrix, either solid or liquid, for use in matrix-assisted-laser-desorption-ionization, most particularly in a time-of-flight mass spectrometer which can further promote throughput and utility of MALDI-TOF MS. The error diffusion processing includes determining a rendered pixel value for the one separation by applying a quantization function for a given pixel. Where the electrical device is a portable communications device, then the accessory may be, for example, a fascia. A network of RF transceivers or nodes may be situated at various locations along the wellbore and the motorpump assembly to gather information about conditions at different points, with transmission on the power cable shared among the nodes through a spread spectrum andor multiple access protocol.