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A capillary nanotip ion source. (a) Mounting a nanotip. The picture shows the O-ring between the threaded HPLC fitting and the mounting block. (b) The nanotip assembly, also showing the three legs that engage the register. (c) Scanning electron micrograph of a pulled capillary nanotip. (d) Detail showing the 61 nm inside and 170 nm outside diameters of the orifice. The nanotip was coated with nm of carbon for imaging.
