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Polymer Microchip for Electrophoresis-Mass Spectrometry Fabricated by Hot Embossing and Low Temperature Direct Bonding

Integrated electrophoresis-mass spectrometry polymer devices were fabricated. The electrospray ionization (ESI) emitter tip structure was formed directly at the microchip electrophoresis (MCE) outlet. Since these devices enable negligible dead volume at the electrospray port, efficient spray of the sample necessary for high resolution mass spectrometry (MS) was realized. Stable spray was also achieved at the low flow rate (-0.1 muL/min) without additional pump. Low cost and high performance COP MCE-MS chip was fabricated by hot embossing and low temperature direct bonding.