Dip coating turns a beaker of precursor and a controlled withdrawal speed into a uniform thin film — but only when the lift mechanism, environment, and sample geometry are matched to your chemistry. The dip coaters in this collection cover the full span from sub-nm/s monolayer assembly to roll-to-roll separator functionalization, so you can pick the unit that fits your substrate size, viscosity range, and downstream thermal step.
Dip coating is a workhorse in sol-gel synthesis, layer-by-layer (LbL) assembly, separator and membrane functionalization, and protective overcoats for SOFC, battery, and electrolyzer components. Film thickness is governed by withdrawal speed, solution viscosity, and evaporation rate (Landau-Levich and capillary regimes), so reproducibility depends almost entirely on motion control and atmosphere stability.
Speed and resolution
For ultra-thin coatings — self-assembled monolayers, ordered ceramic membranes, sub-100 nm sol-gel layers — choose nano-speed or micro-speed units that drive the substrate at nm/s to um/s through piezo or high-resolution stepper stages. These run in the capillary / evaporation regime where film thickness is decoupled from inertial fluid dynamics. For routine sol-gel and slurry work, standard programmable coaters in the mm/s range are sufficient.
Throughput and multi-layer workflows
Multi-position carousel coaters (4, 5, or 6 stations) are built for LbL assembly, alternating-layer stacks, and rinse cycles between active, binder, and wash baths. Independent heating and stirring per station keep precursor solutions stable across long runs. Angle-adjustable variants let you tilt the substrate from 0° to 90° to break the vertical wedge effect and tune meniscus behavior on each face.
Substrate size and integrated thermal processing
Medium and large programmable coaters extend stroke and motor torque for planar SOFC supports, electrode foils, and membranes up to a few hundred millimeters per side. Units with an integrated drying oven or three-zone tube furnace let you dip, withdraw, and pass the green film straight into a calcination or sintering profile without manual transfer. For continuous webs — separator functionalization, ion-exchange membrane fabrication, double-sided coatings — a roll-to-roll dip coater with metering rod and IR drying replaces the discrete batch.
If you are building monolayers or sub-100 nm films, start with the nano- and micro-speed units; for LbL or sol-gel multilayer work, use the multi-position carousel coaters; for continuous separator or membrane processing, see the roll-to-roll variant. Related sections: Coaters and Laboratory Equipment.
