Dip Coater

Order Code: L2006A1-UK
Manual

Price

(excluding Taxes)

£1,800.00


The Ossila Dip Coater is currently in development, with an expected launch in Q3 2018. For more information on the upcoming release date, specifications, or price - please contact us at info@ossila.com


The Ossila Dip Coater provides high-performance specifications, simple-to-use in-built software, and low costs to give researchers the tools to coat high-quality films at a reasonable price.

Dip coating is one of the most widely-used coating processes in industry and academia for producing thin films of materials. By controlling the speed of withdrawal of a substrate from solution, it is possible to vary the thickness of the deposited film. By using a high-precision motor, the rate of withdrawal - and therefore the film thickness - can be controlled with a high degree of accuracy and reproducibility.

The Ossila Dip Coater uses the same high-precision stages used in our Slot-Die Coater and Syringe Pump to provide accurate movement. This results in high-quality films that can be easily & repeatedly produced - giving you the results you want, every time.






Features

High-Precision Motor - Building upon our motorised stages used in our slot-die coater and syringe pump, we have developed a motor with high degree of accuracy and reproducibility. By ensuring such high degrees of reproducibility you can be sure that each time you coat your sample you are getting the same results.

Wide Range of Speeds - Our Dip Coater can withdraw a substrate from solution at rates varying from as low as 0.1mm/s to as high as 50mm/s. This gives a wide range of coating thicknesses - all from a single dip-coating system.

Compact Size - The small footprint of the system enables you to perform measurements even in the smallest and busiest labs! With a total bench area of 10 cm x 30 cm, you can be assured that the Dip Coater will fit in your lab.

Simple-to-Use Software - The in-built software and controls on the Dip Coater have been designed to make it easy for you to programme an experiment. By setting the immersion speed, dwell time, withdrawal speed, and drying time, the entire dip coating process can be completed.

In-Built Safety - Ensuring the highest degree of safety, the Dip Coater has a crash detection system built into the software. This will detect when the substrate or arm crashes into the base of the coater or a beaker. Upon detecting this, the motor will stop. This reduces the chance of damaging your samples, glassware, or the Dip Coater itself.

Variable Withdrawal Speeds - The speed of withdrawal can be varied across the substrate length. This enables you to produce thickness gradients across a film for the quick optimisation of film thicknesses.

User Profiles & Saved Recipes - 10 separate user profiles are available, with each capable of saving up to 20 different coating recipes. This saves time by allowing you to store working recipes for future use - perfect for busy labs, where multiple scientists share the same piece of equipment! 

Quick-Release Clamp - Our quick release clamp design allows the user to quickly load and unload samples onto the dip coater arm. The pressure produced can be adjusted to help protect delicate samples.



Applications

    • Self-Assembled Monolayers
    • Sol-Gel Coatings
    • Thin-Film Electronics
    • Protein Coatings
    • Gas Sensing
    • Microporous Foams
    • Highly-Aligned Nanowire and Nanotube Arrays
    • Oriented Crystallisation
    • and many more...



    Software

    The Dip Coater's in-built software (no PC required) allows for both manual and automated control. Manual coating allows you to set the immersion and withdrawal of the system independently. The system has a total of 10 individual user profiles, with each profile allowing a total of 20 unique recipe programmes to be saved.


    Dip Coater Software Manual Mode

    For automated coating, the immersion and withdrawal speeds can be set independently. If variable thicknesses across the substrate are needed, a gradient of withdrawal speed can be set across the substrate length. Both the time that the substrate is immersed for and the time of drying can be controlled, while the routine can be repeated using the 'Repeat Cycles' function.


    Dip Coater Software Automated Mode

    Additionally, the Dip Coater has multiple in-built safety features, including a software-based crash detection system. This will stop the movement of the system if it detects the crashing of the substrate into a beaker - saving the user from damage to the sample or beakers.



    Specifications

    Minimum Withdrawal Rate 0.1 mm.s-1
    Maximum Withdrawal Rate 50 mm s-1
    Rate Reproducibility ±0.006% @ 1mms-1 ; ± 0.05% @ 10mm.s-1 ; ± 0.03% @ 50mm.s-1
    Maximum Travel Distance 120 mm
    In-built Software Features Variable Withdrawal Speed
    Repeat Cycles
    Crash Detection
    User Profiles 10
    Programmes Per User 20
    Power Supply DC 24V
    Overall Product Dimensions Width: 100 mm
    Height: 100 mm
    Depth: 300 mm
    Shipping Weight < 5kg
    *Specifications are subject to change before release


    Theory

    Dip coating utilises the behaviour of the solution meniscus at the withdrawal point of the substrate from the solution bath to control the thickness and properties of the deposited film. The interaction between the gravitational force acting on the withdrawn solution, the capillary forces of the solution, the surface tension, and inertial forces ultimately determine the amount of solution deposited onto the substrate. Although there are many factors involved in determining the strength of these forces and how an equilibrium between them is reached almost all of these are constant for a given solution.

    Dip Coating Thickness Equation
    Dip-Coating Thickness Equation

     

    The thickness of the films formed during dip-coating is most closely given by the Landau-Levich equation. The values c, ρ, γ and η are properties of the deposited solution; where c is a constant that is dependent upon the behaviour of a solution, ρ is the density of the solution, γ is the surface tension at the liquid-air interface, and η is the viscosity of the solution. The value g is the gravitational constant and U is the withdrawal speed.

    Please note that in practical circumstances, these equations do not give completely accurate theoretical determinations for thin-film thicknesses. This is because the exponent of the withdrawal speed can vary due to solution properties. When trying to optimise the processing conditions, calibration curves should be taken for the solution in use.

    More information on the theory of dip coating can be found in our dip coating theory guide, including more details on the theoretical thin-film thicknesses, the interaction of the capillary and gravitational forces, and behaviour of the wet film during the withdrawal and drying phase.


    To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.

     


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