Used as a coating agent in cell culture to enhance cell adhesion, particularly for sensitive or primary cells that require a positively charged surface for proper attachment and growth. Its positive charge interacts with the negatively charged cell membranes, promoting spreading and stability. Commonly applied in neuroscience research for neuron cultures, where strong adhesion is critical. Also utilized in drug delivery systems due to its biocompatibility and ability to form complexes with nucleic acids or other negatively charged molecules. Employed in biosensors and bioengineering to immobilize biomolecules on surfaces. Its biodegradability and low toxicity make it suitable for various biomedical applications.