Interaction of NH3 with the reduced surface of graphite fluoride C2F

A treatment of graphite fluoride C2F with hydrazine vapor resulted in development of conductive surface layer. Exposure of the reduced C2F sample to gaseous NH3 (similar to 5% in ambient air) was shown to lead to rapid increase in layer resistance. Relative change of resistance averaged over three cycles is Only air purging at room temperature is required to recover the sensor. Quantum chemical calculations showed that NH3 molecules should interact more readily with partially fluorinated graphitic layer than with graphene. [GRAPHICS] Side view of NH3 molecule on the top of reduced surface of fluorinated graphene. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim