Concentration and chemical-state profiles at heterogeneous interfaces with sub-nm accuracy from standing-wave ambient-pressure photoemission. - Nemšák S; Shavorskiy A; Karslioglu O; Zegkinoglou I; Rattanachata A; Conlon CS; Keqi A; Greene PK; Burks EC; Salmassi F; Gullikson EM; Yang SH; et al. (Nature communications, 2014)