The quality of blood glucose test strips is crucial for accurate diabetes management. Reliable test strips provide a precise measurement of blood glucose levels, enabling individuals to monitor their glucose levels and make informed decisions about their diabetes management.
Hydrophobic coatings on blood glucose test strips are crucial for ensuring accurate and reliable results by preventing moisture from interfering with the test reaction. This prevents the strips from becoming prematurely saturated, which could lead to inaccurate readings.
To improve the electrical performance the gold electrode’s surface area must remain pristine to facilitate efficient electron transfer during the glucose-oxidase reaction. Contaminants reduce effective surface area, skewing current measurements.
How to clean PET gold-plated electrodes for blood glucose detection using plasma treatment to enhance hydrophilicity before applying a hydrophobic coating?
1. Plasma Treatment for Hydrophilicity:
- Purpose: Remove residual organic contaminants, introduce oxygen-containing groups and functionalize the surface to increase hydrophilicity.
- Setup: Use an oxygen plasma system as the Keylink Vacuum Plasma Treatment System VL-80A (or customized versions based on requirements).
- Parameters:
- Gas: Oxygen and/or Argon (combination)
- Power: Parameters need to be optimized to avoid damaging PET or gold (low power, short duration).
- Pressure: based on material specifications.
- Time: optimize to balance cleaning and substrate integrity.
- Outcome: O₂ plasma introduces oxygen-containing groups (-OH, -COOH) on PET and cleans gold surfaces, enhancing hydrophilicity
2. Hydrophobic Coating Application:
- Purpose: Apply a hydrophobic layer to control fluid flow or protect non-active areas.
- Methods (choose based on coating type):
- Self-Assembled Monolayers (SAMs)
- Polymer Coatings
3. Masking (Optional):
- Purpose: Pattern hydrophobic/hydrophilic regions (e.g., hydrophilic electrodes with hydrophobic barriers).
- Method: Use photolithography or physical masks during plasma treatment or coating to protect active areas.
