Self-oriented monolayer immobilization of ovalbumin and B. cereus antibody molecules on a chemically modified surface of silicon nitride fosters the enhancement of capture of bio-agents.

•Self-oriented monolayer immobilization of antibody molecules for biosensing applications.•Highly sensitive and specific surface for a selective and quantitative detection of biological threats.•Detection of the Bacillus anthracis spores and Ricin A toxins.