On Wikipedia, the entire microelectrode page states only the following:
A microelectrode is an electrode of very small size, used in electrophysiology for either recording of neural signals or electrical stimulation of nervous tissue. Initially, pulled glass pipette microelectrode was used with later introduction of insulated metal wires. These microelectrodes are made from inert metals with high Young modulus such as tungsten, stainless steel, platinum and iridium oxide and coated with glass or polymer insulator with exposed conductive tips. More recent advances in lithography yielded to silicon based microelectrodes.
Can someone provide a more elaborate explanation of how it works?
Like ideally, I would like something as specific as the usual descriptions you see in introductory chemistry books for how emf works in a battery. In other words, I know how electric potential works, but I am not understanding the exact mechanism of the microelectrode works.
If there are many types of microelectrodes, just give me the properties of one involving small shafts of hollow glass filled with a conductive salt solution.
Pictures would be great.