Comparative molecular resolution STM imaging of thiourea, ethyltiourea and sulfur self-assembled adlayers structures on silver (111)

V. BRUNETTI; B. BLUM; R. C. SALVAREZZA; A. J. ARVIA

LANGMUIR

American Chemical Society

Año: 2003 vol. 19 p. 5336 - 5336

0743-7463

p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: justify; mso-layout-grid-align: none">Self-assembled adlayer structures of thiourea (TU), ethylthiourea (ETU), and sulfur (S) adsorbed on Ag(111), from neutral and alkaline aqueous solutions, are investigated with a scanning tunneling microscope operating under potential control. Voltammograms obtained under various different potential routines are very similar for the three substances. At potentials close to -1.2 V (versus saturated calomel electrode), a (