The sleekest ultraportables from Dell and HP, the XPS 13 Plus and Spectre x360 14, get a head-to-head comparison from Gordon. By Michael Crider. Staff Writer, PCWorld Oct 26, 2022 3:30 am PDT.

Methods like X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectroscopy (ToF-SIMS) are two highly sensitive surface analysis tools that offer a considerable amount of ...