Organic films for nanoelectronics and sensing applications

Films of polyallylamine hydrochloride (PAA) and polysteresulfonate sodium salt (PSS) were formulated using the polyelectrolyte self-assembly technique. Electrical measurements show that there is no presence of counter ions and films are electrically stable. Responses of composite films of PAA/(indicator/PAA)/sub n/(Enzyme/PAA)/sub m/ deposited on suitably treated glass substrates to heavy metals and pesticides are found to be selective from their optical absorption spectra.