Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/2384
Title: Ultrafast response humidity sensor using supramolecular nanofibre and its application in monitoring breath humidity and flow
Authors: Mogera, Umesha
Sagade, Abhay A.
George, Subi Jacob
Kulkarni, G. U.
Keywords: Field-Effect Transistors
Pi-Conjugated Systems
Exhaled Breath
Moisture Measurement
Hydration Status
Thin-Films
Diagnosis
Electronics
Nanowire
Nanoparticles
Issue Date: 2014
Publisher: Nature Publishing Group
Citation: Mogera, U; Sagade, AA; George, SJ; Kulkarni, GU, Ultrafast response humidity sensor using supramolecular nanofibre and its application in monitoring breath humidity and flow. Scientific Reports 2014, 4, 4103 http://dx.doi.org/10.1038/srep04103
Scientific Reports
4
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 hence the conductivity. It is demonstrated to be as a novel breath sensor which can monitor the respiration rate. Using two humidity sensors, a breath flow sensor was made which could simultaneously measure RH and flow rate of exhaled nasal breath. The integrated device was used for monitoring RH in the exhaled breath from volunteers undergoing exercise and alcohol induced dehydration.
Description: Restricted Access
URI: http://hdl.handle.net/10572/2384
ISSN: 2045-2322
Appears in Collections:Research Articles (Kulkarni, G. U.)
Research Papers (Subi Jacob George)

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