| Title | In-situ impedance spectroscopy of layer-by-layer self-assembly of polyelectrolytes |
| Publication Type | Conference Paper |
| Year of Publication | 2012 |
| Authors | Prashanth, GR, Murali, P, Varma, MM, Bhat, N |
| Conference Name | Emerging Electronics (ICEE), 2012 International Conference on |
| Date Published | Dec |
| Keywords | Biological system modeling, Biosensors, Capacitors, electrochemical electrodes, electrochemical impedance spectroscopy, in-situ impedance spectroscopy, interdigitated capacitors, layer-by-layer self-assembly, Medical diagnostic imaging, PAH-PAA biIayers, poly(acrylic acid), poly(allylamine hydrochloride), polyelectrolyte binding electrical equivalent, polymer electrolytes, self-assembly |
| Abstract | In-situ impedance spectroscopy of layer-by-layer self-assembly of weak polyelectrolytes is presented. Interdigitated capacitors with active area of 1×1 mm2 and electrode spacing of 5 μm are fabricated and used for this purpose. Measurement results indicate that the impedance decreases with increase in number of polyelectrolyte layers. About 2.5% of relative change in magnitude of impedance at 104.7 KHz is seen for four bi-layers of Poly(Allylamine Hydrochloride) (PAH)/Poly(Acrylic acid) (PAA). An electrical equivalent for polyelectrolyte binding is obtained. |
| DOI | 10.1109/ICEmElec.2012.6636250 |
