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Design, fabrication and assembly of the vacuum electrospray source. A) Design for prototype source consists of a modified CF 2.75 in flange B). Photograph of assembled prototype flange. Total internal length is ~2.2 in. C) Photograph of a freshly etched polyamide/fused silica nanoelectrospray capillary.  

Design, fabrication and assembly of the vacuum electrospray source. A) Design for prototype source consists of a modified CF 2.75 in flange B). Photograph of assembled prototype flange. Total internal length is ~2.2 in. C) Photograph of a freshly etched polyamide/fused silica nanoelectrospray capillary.  

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Secondary Ion Mass Spectrometry (SIMS) is a powerful technique for high spatial resolution chemical mapping and characterization of native surfaces. The use of massive cluster projectiles has been shown to extend the applicable mass range of SIMS and improve secondary ion yields 100 fold or beyond. These large projectiles however, present a challen...