Enhanced Response of n-Channel Naphthalenetetracarboxylic Diimide Transistors to Dimethyl Methylphosphonate Using Phenolic Receptors


  • This work was primarily supported by the Johns Hopkins Applied Physics Laboratory Fellowship and Partnership programs. Additional support of the NSF SENSORS program is also gratefully acknowledged. Thanks to Jia Huang for helpful discussion and Mark Koontz for assistance with SEM imaging. Additional thanks to Lesly McAnelly at the Johns Hopkins Applied Physics Lab for oxidation of silicon wafers as well as shadow mask production.


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A bilayer organic field effect transistor (OFET) sensor utilizing a phenol functionalized molecule as a receptor layer, designed to enhance interaction with a target vapor dimethyl methylphosphonate (DMMP) is presented. The presence of this receptor layer is shown to enhance the sensing properties of the device, supporting the hypothesis that the phenolic receptor material is hydrogen bonding to the DMMP vapor molecules.