title: Optical-power-dependent photodesorption kinetics of graphene studied by conductance response.
abstract: The photodesorption kinetics of graphene with various UV laser power is studied by conductance response. Analytical expressions of the power-dependent photodesorption kinetics of graphene in ambience are derived. The photodesorption time constant τd, steady current, and magnitude of modulation current, can be expressed as functions of the adsorption time constant τa, desorption cross section σ, and photon flux density. Under illumination the steady occupation ratio of adsorbed O2on graphene is equal to τd/τa. It is suggested that the photodesorption of O2on graphene is attributed the injection of photogenerated hot electrons and is restricted by the density of antibonding states of O2.
authors.forename: Yang-Yang
authors.initials: YY
authors.lastname: Hsu
authors.forename: Chi-Yuan
authors.initials: CY
authors.lastname: Lin
authors.forename: Yi-Chun
authors.initials: YC
authors.lastname: Lai
authors.forename: Kun-Rui
authors.initials: KR
authors.lastname: Wu
authors.forename: Kwai-Kong
authors.initials: KK
authors.lastname: Ng
authors.forename: Chen-Shiung
authors.initials: CS
authors.lastname: Chang
authors.forename: Gou Chung
authors.initials: GC
authors.lastname: Chi
authors.forename: Pei-Chen
authors.initials: PC
authors.lastname: Yu
authors.forename: Forest
authors.initials: F
authors.lastname: Shih-Sen Chien