Cell Proliferation Tracking Using Graphene Sensor Arrays
Figure 4
(a) Example of the Raman spectrum of CVD-grown graphene after transfer. (b) Controlled deposition of small volumes of LB/glycerol medium is shown to be accurate by optical microscopy. (c) The p-type behaviour of the pristine graphene is observed, and a clear increase in hysteresis is noted upon measurement of LB. A shift in gate dependency with LB concentration is also noted. The glycerol is added to reduce droplet evaporation and is maintained at the same concentration in each case. (d) A change in resistance with LB concentration is noted using two-probe measurements on the graphene FET. Error bars are calculated based on droplet repeatability findings by Lukacs et al. [19].
