nanoHUB-U Nanobiosensors L3.4: Sensitivity - Potentiometric Sensors - ISFET as a pH-Meter





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Published on Feb 19, 2014

Table of Contents:
00:09 Lecture 3.4: Potentiometric Sensors ISFET as a pH-Meter
01:50 Outline
02:54 MOSFET as a pH sensor
09:15 Outline
09:35 Basics of pH control: pH of Pure Water
12:43 Basics of pH Control: Acid/Base
15:29 pH and Surface Charge
16:53 Surface Charging with pH
18:30 Surface Binding Model
21:16 Point of Zero Charge
22:52 Self-consistent surface charge
26:16 Aside: Surface potential and Buffer capacity
28:09 Outline
28:33 Nernst Limit of an Ion Sensitive FET
32:46 Conclusions

This video is part of the nanoHUB-U course "Principles of Electronic Nanobiosensors". (https://nanohub.org/courses/PEN)

This course provides an in-depth analysis of the origin of the extra-ordinary sensitivity, fundamental limits, and operating principles of modern nanobiosensors. The primary focus is the physics of biomolecule detection in terms of three elementary concepts: response time, sensitivity, and selectivity. And, it potentiometric, amperometric, and cantilever-based mass sensors to illustrate the application of these concepts to specific sensor technologies.

For more details see http://nanohub.org/u


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