Upon request, Q-Sense coats sensor crystals with thin (nm) polymer coatings. The most common method is spincoating; a few percent of the polymer is dissolved in a suitable solvent and a droplet is placed on the sensor crystal. In the next step, a spincoater rotates the sensor crystal at a high rpm, thus creating a thin polymer coating in a reproducible manner. After spincoating, the solvent evaporates. Spincoating can also be used to create coatings that mimic other materials, such as cellulose.
Q-Sense has experience with the following materials:
PS, PMMA, PP, PE, PC, Cellulose and Polymers that polymerize upon UV light. Polystyrene coated gold crystals is one of Q-Sense standard sensor crystals, QSX 305.
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