Abstract
We describe the assembly of layer-by-layer films based on the poly(propylene imine) dendrimer (PPID) generation 3 and nickel tetrasulfonated phthalocyanine (NiTsPc) for application as chemically sensitive membranes in separative extended-gate field effect transistor (SEGFET) pH sensors. PPID/NiTsPc films were adsorbed on quartz, glass, indium tin oxide, or gold (Au)-covered glass substrates. Multilayer formation was monitored via UV-vis absorption upon following the increment in the Q-band intensity (615 nm) of NiTsPc. The nanostructured membranes were very stable in a pH range of 4-10 and displayed a good sensitivity toward H + , ca. 30 mV/pH for PPID/NiTsPc films deposited on Au-covered substrates. For films deposited on ITO, the sensitivity was ca. 52.4 mV/pH, close to the expected theoretical value for ion-sensitive membranes. The use of chemically stable PPID/NiTsPc films as gate membranes in SEGFETs, as introduced here, may represent an alternative for the fabrication of nanostructured, porous platforms for enzyme immobilization to be used in enzymatic biosensors.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
