A method, apparatus and computer program product, for fabricating an array of biopolymers on a substrate. The p-GlcNAc of the invention is a polymer of high molecular weight whose constituent monosaccharide sugars are attached in a -14 conformation, and which is free of proteins, and substantially free of single amino acids, and other organic and inorganic contaminants. The method comprises the steps of holding the capsule in a precise and upright position and injecting a known quantity of sealing fluid in the overlap of the body parts.