Several papers have reported synthesis of PSs of various dimensionalities as nanoparticles or other nanostructured forms. Although nanoparticle synthesis is amenable to high-throughput combinatorial experiments, material properties may be affected by size effects. Further, measurements of various electrical and optical properties require aggregation of nanoparticles into larger units (typically thin films). In these cases, problems with insufficient nanoparticle coalescence and film compactness can affect the results.