In order to explore the solution morphology of polymer brushes at a higher resolution, silicon blocks were coated with PDMAEMA brushes at different densities and thickness (as described above), as well as PMETAI brushes. The Si blocks were parallelepipedal in section (80 mm×50 mm×15 mm) and were sealed against an O-ring sitting on a rigid PEEK trough, with a shallow well (<0.5 mm) to contain the bulk liquid volume (∼2 mL). A high-pressure liquid chromatography (HPLC) pump with 4 inlet channels, a mixing chamber, a de-gassing unit (Knauer Smartline 1000) were deployed to automate controlled injections into a rack of seven sample cells.