(I) The Nature Of The Metal (Ii) The Conditions Of The Metal Surface.
It is a property of material. Work function (wf), denoted by φ, is the difference of the rise in mean electrostatic potential across the metal surface and the bulk chemical potential of the electrons relative to the mean electrostatic potential in the metal interior. It is denoted by ϕ.
If The Energy Of The Photon ‘Hν’ Is Less Than The Work Function Hν, Then No Emission Of Electrons Takes Place.
Ag (theoretical) are denoted as continuous and dotted lines, respectively. F is the force, d is the displacement caused by the force; The work function is usually denoted by the greek letter φ.
W Is The Work Done By The Force.
Thus, knowing the absolute work function of the calibrated gold. To evaluate the work functions of metal silicides the concept of for sp electronegativity equalization is applied to the unit formu~a of the silicide, vzxsiy,where rn substitutes for the metal. It is denoted by φ, thus work function formula φ=hν 0 where ν 0 is the threshold.
The Work Function Can Be Obtained By Comparing The Fermi Level With The Vacuum Level In A Lda Calculation.
Hν= hν 0 +1/2 mv 2; Albert einstein used the work function of a metal to describe the photoelectric effect. 1/2mv 2 max = h(v−v 0) (since, w = hv 0) where the maximum kinetic energy of the electron is denoted by v max.
The Work Function Depends On:
Lowest work functions available, such as cesiated tungsten anodes with work functions ≈ 1.5 ev. The local density of state (ldos) of au after annealing at r.t. Conductive materials like metals have relatively low work functions.