This paper introduces a portable and user-friendly microfluidic liquid handling automation platform The Maasi spin coater is an innovative and affordable tool designed for applying uniform thin films onto substrates, essential in various scientific applications. With a total cost of less than €100 and a build time of around two hours, this 3D printed spin coater is accessible for laboratories and educational settings. The device features a touchscreen interface for easy operation and uses common components, making it a practical choice for researchers.
Key Features
- Cost-Effective: The total materials cost is approximately €85, significantly cheaper than commercial spin coaters.
- User-Friendly Interface: A touchscreen interface simplifies operation, allowing users to easily set parameters and control the coating process.
- 3D Printable Design: All major components are 3D printed, ensuring easy fabrication and customization.
- Versatile Substrate Support: Can accommodate substrates up to 80 mm in diameter, making it suitable for various applications.
- Closed-Loop Speed Control: Uses a brushless DC motor and an electronic speed controller (ESC) for precise speed regulation.
Specifications
| Specification | Details |
|---|---|
| Device Name | Maasi Spin Coater |
| Cost | €85 |
| Dimensions | Varies based on substrate holder design |
| Weight | Lightweight due to 3D printed parts |
| Power Supply | 12V power adapter |
| Speed Range | 300 RPM to 8000 RPM |
| Open Source License | GNU General Public License v3 |
| Source File Repository | GitHub Repository |
Build Instructions
- 3D Print Components: Use provided STL files to print all necessary parts.
- Assemble Electronics: Integrate the motor, ESC, and touchscreen with appropriate wiring.
- Set Up Firmware: Program the ESP32 microcontroller to control the spin coater’s functions.
- Calibration: Adjust parameters for speed and coating time through the touchscreen interface.
Operation Instructions
- Prepare Substrate: Attach the substrate holder and place the substrate.
- Set Parameters: Use the touchscreen to set the desired speed and time for coating.
- Start Coating: Click the start button to begin the dispensing and spinning process.
- Complete Process: Wait for the countdown to finish before removing the coated substrate.
The Maasi spin coater is an innovative solution for researchers and educators requiring a low-cost, efficient method for applying thin films. Its ease of use and customization potential make it a valuable addition to any laboratory focused on materials science, nanotechnology, or biology.
