02515nas a2200313   4500008004100000245012200041210006900163260000800232300001400240490000600254520147300260653003801733653001901771653001801790653002001808653001801828100002501846700001601871700002501887700001601912700001601928700002401944700002301968700001701991700002702008700001702035700002602052856012302078       2026                        eng d00aField emission performance of 2D Ti2CT x (T x = O2, F2, O-F) MXene: experimental insights and theoretical endorsement0 aField emission performance of 2D Ti2CT x T x O2 F2 OF MXene expe  cAPR  a6775-67870 v93 a<p>
	Field emission (FE) is an important electron emission mechanism for vacuum microelectronic devices; however, conventional emitters often exhibit high turn-on fields, limited emission stability, and degradation during prolonged operation. Two-dimensional MXenes have recently emerged as promising FE materials due to their remarkable electrical conductivity, comparatively low work function, and tunnelable surface terminations. Nevertheless, most studies have focused on Ti3C2T x MXene, while other compositions such as Ti2CT x remain largely unexplored, particularly regarding the influence of surface terminal groups on their electronic and emission properties. Herein, Ti2CT x (T x = -F2, -O2, -OF) MXene was synthesized via selective chemical etching of the Ti2AlC MAX phase and investigated for its FE characteristics. The material exhibits a polycrystalline hexagonal layered structure with a high specific surface area of 349.02 m2 g-1. Ti2CT x MXene demonstrates excellent FE performance with a low turn-on field of 1.56 V mu m-1 and a threshold field of 2.0 V mu m-1 (at 10 mu A cm-2), along with a stable emission for 4 h. Density functional theory calculations further reveal that surface terminations strongly influence the electronic structure and work function, with the experimental value of 4.66 eV closely matching the -F2 termination. These results highlight Ti2CT x MXene as a promising material for stable and efficient FE applications.</p>
10a2D Ti2CT <italic>x</italic> MXene10afield emission10aTDOS and PDOS10aTurn-on voltage10aWork function1 aKakade, Prashant, M.1 aAher, Rahul1 aKachere, Avinash, R.1 aCho, Jinill1 aDeore, Amol1 aJadkar, Sandesh, R.1 aChauhan, Inderjeet1 aKim, Taesung1 aMandlik, Nandkumar, T.1 aKim, Ji, Man1 aBulakhe, Ravindra, N.  uhttps://library.ncl.res.in/content/field-emission-performance-2d-ti2ct-x-t-x-o2-f2-o-f-mxene-experimental-insights-and