Ultrafast response humidity sensor using supramolecular nanofibre and its application in monitoring breath humidity and flow.

ABSTRACT: Measuring humidity in dynamic situations calls for highly sensitive fast response sensors. Here we report, a humidity sensor fabricated using solution processed supramolecular nanofibres as active resistive sensing material. The nanofibres are built via self- assembly of donor and acceptor molecules (coronene tetracarboxylate and dodecyl methyl viologen respectively) involved in charge transfer interactions. The conductivity of the nanofibre varied sensitively over a wide range of relative humidity (RH) with unprecedented fast response and recovery times. Based on UV-vis, XRD and AFM measurements, it is found that the stacking distance in the nanofibre decreases slightly while the charge transfer band intensity increases, all observations implying enhanced charge transfer interaction and h

SUBMITTER: Mogera U 

PROVIDER: S-EPMC3925946 | biostudies-literature | 2014 Feb

REPOSITORIES: biostudies-literature