Talk:Work function
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This is a question about work fonction for a glass surface:
How does the work function change when the glass surface is 'wet' i.e. it is covered with few monolayers of water?
How doe the work function change when the glass surface is covered by some deposits? How does this change depends on the composition of these depostits?
Will be very grateful for any information or for suggestions how to make such measurements..
Adam Para, para@fnal.gov
doing some research:
"defines characteristics of contact between two materials featuring different work function; for conductor-semiconductor contact determines whether contact is ohmic or rectifying."
Actually the ionization potential and work function of any metal is the same, but it is different for semiconductors or insulators. In fact work function is defined as the energy required to remove an electron from Fermi level to Vacuum level(energy level differences), but ionization potential is the energy required to remove the electron from the bottom of the conduction band to vaccuum level. I hope that I have clearly written to you, if not pleaze advice me.
http://arxiv.org/PS_cache/physics/pdf/0207/0207116.pdf
does the work function depend on the charge of the material? i would imagine it does. - Omegatron 20:45, May 20, 2005 (UTC)
- looks like it does: "The same process will charge a spacecraft orbiting in the sunlight positively, to a few volts. Sunlight knocks out electrons from the surface and a few manage to escape, leaving the spacecraft positively charged; the situation then stabilizes, because the positive charge prevents any more electrons from leaving." - Omegatron 21:46, May 20, 2005 (UTC)
the equation needs to have all the terms defined. - Omegatron 20:45, May 20, 2005 (UTC)