Polyanhydrides which link low molecular weight drugs containing a carboxylic acid group and an amine, thiol, alcohol or phenol group within their structure into polymeric drug delivery systems are provided. In one example process, a first electronic device can select one of a first location determined by the first electronic device and a second location determined by a second electronic device for use as the location of the first electronic device. The requirement information includes at least one of a power requirement or a thermal requirement. Then, the sacrificial material is removed from the via opening, thereby allowing the via and the trench to be filled with a conductive material by dual damascene processing, wherein the formation of the trench and the removal of the sacrificial material from the via is implemented through a single etching operation. For example, bulk alignment of LCLCs allows one to use them in detection and amplification of ligands.