Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Fabrication process of microfluidic solid-phase micro-extraction (SPME) module ESI emitter: (a) Photo mask A, photo mask B and SU-8 master mold of integrated-corner ESI emitter; (b) Photo mask A, photo mask B, photo mask C and SU-8 master mold of FF ESI emitter; (c) illustration of single polydimethylsiloxane (PDMS) slabs of both chips.
