Gas chromatography (GC) relies on the interaction of vapor molecules with the stationary phase coated on the column inner wall to separate different vapor molecules. Here, graphene is integrated as the ultrathin and electrically tunable stationary phase within a GC column. Graphene has different interactions with different vapor molecules, which leads to separation of those vapor molecules. In addition, by configuring graphene into a field effect transistor (FET) design, the molecule-graphene interaction can be controlled or tuned by adjusting the graphene Fermi level through the FET gate voltage. As a result, the binding energy between graphene and adsorbed vapor molecules can be tuned and hence the elution time and/or elution order of vapor molecules can be changed.

Methods of preparing polymer-filled chromatography resin and their uses are provided.

The present invention relates to a chromatography medium and a chromatography apparatus comprising the same. The chromatography medium is at least partially composed of polymer materials formed by crosslinking at least partially cross-linkable oligomer materials, including rigid nanoparticles, and the rigid nanoparticles at least partially form a substantially ordered structure. According to the chromatography medium and chromatography apparatus disclosed in the present application, the polymer microparticles stack can be used as the stationary phase where, at least sections of the microparticles have internal structural ordering, including molecular orientation and pore structure ordering, or an integral structure can be used as the stationary phase where, the rigid nanoparticles at least partially form a substantially ordered structure, which not only may effectively increase the separation speed and shorten the peak elution times, but improve the peak symmetry, efficiently the full width at half maximum and improve the column efficiency.

Methods of preparing polymer-filled chromatography resin and their uses are provided.

This invention relates to a new stationary phase carrying functional groups comprising a halogen substituted aromatic ring. Target molecules can interact with this stationary phase by halogen bonding. The stationary phase is suitable for SPE or chromatographic separations.