TY - JOUR
T1 - Diffusion on surfaces using laser diffraction
T2 - Effect of adsorbate lateral interactions
AU - Verhoef, R. W.
AU - Asscher, M.
PY - 1997/4/10
Y1 - 1997/4/10
N2 - The importance of lateral interactions in surface diffusion is discussed by means of optical second harmonic diffraction from a monolayer grating using model simulations. Measurements of high order diffraction signals during surface diffusion at various laser powers and initial surface coverages provide information on the type of interactions between adsorbates on the surface, i.e. attractive, repulsive, or none. Strong interactions between surface adsorbates are predicted to show unusual behavior of the higher order (n> 1) diffraction signals, with the signal strength sometimes oscillating during diffusion. These results are applicable for linear diffraction as well.
AB - The importance of lateral interactions in surface diffusion is discussed by means of optical second harmonic diffraction from a monolayer grating using model simulations. Measurements of high order diffraction signals during surface diffusion at various laser powers and initial surface coverages provide information on the type of interactions between adsorbates on the surface, i.e. attractive, repulsive, or none. Strong interactions between surface adsorbates are predicted to show unusual behavior of the higher order (n> 1) diffraction signals, with the signal strength sometimes oscillating during diffusion. These results are applicable for linear diffraction as well.
KW - Laser induced thermal desorption (LITD)
KW - Second harmonic generation
KW - Surface diffusion
UR - http://www.scopus.com/inward/record.url?scp=0031120754&partnerID=8YFLogxK
U2 - 10.1016/S0039-6028(96)01332-5
DO - 10.1016/S0039-6028(96)01332-5
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AN - SCOPUS:0031120754
SN - 0039-6028
VL - 376
SP - 395
EP - 402
JO - Surface Science
JF - Surface Science
IS - 1-3
ER -