PMID- 20949961
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20110304
LR  - 20101110
IS  - 1520-5827 (Electronic)
IS  - 0743-7463 (Linking)
VI  - 26
IP  - 22
DP  - 2010 Nov 16
TI  - In situ scanning tunneling microscopy investigation of sulfur oxidative 
      underpotential deposition on Ag(100) and Ag(110).
PG  - 17679-85
LID - 10.1021/la103030b [doi]
AB  - Underpotential (UPD) deposition of sulfur from Na(2)S solution in 0.1 M NaOH was 
      studied on Ag(100) and Ag(110) using in situ scanning tunneling microscopy (STM). 
      The cyclic voltammogram on Ag(100) presents two broad peaks, whereas three 
      partial overlapping peaks and a sharper one are observed on Ag(110). STM 
      measurements carried out during the whole UPD process show that progressively 
      more compact structures are formed as the applied potential is scanned toward 
      more positive potentials. More precisely, p(2x2), c(2x6), and c(2x2) were found 
      on Ag(100) at E = -1.25, -1.0, and -0.9 V, respectively. Less definite 
      conclusions can be drawn for the structures of S overlayers on Ag(110). However, 
      the experimental findings are consistent with an incomplete p(2x1) at potentials 
      preceding the sharp peak, and with a c(2x2) structure at E = -0.9 V vs Ag/AgCl, 
      KCl(sat). The coverage values calculated on the basis of the hypothesized 
      structures have been compared with the values obtained from chronocoulometric 
      measurements at the most positive potentials investigated. Thus, the experimental 
      coverage theta = 0.5 coincides with the coverage calculated for the c(2x2) structure 
      found on Ag(110) at E = -0.9 V by STM, whereas the experimental coverage theta = 0.42 
      suggests that a mixture of structures c(2x6) and c(2x2) is formed on Ag(100).
FAU - Lastraioli, E
AU  - Lastraioli E
AD  - Dipartimento di Chimica, Universita di Firenze, via della Lastruccia 3, 50019 
      Sesto Fiorentino (FI), Italy.
FAU - Loglio, F
AU  - Loglio F
FAU - Cavallini, M
AU  - Cavallini M
FAU - Simeone, F C
AU  - Simeone FC
FAU - Innocenti, M
AU  - Innocenti M
FAU - Carla, F
AU  - Carla F
FAU - Foresti, M L
AU  - Foresti ML
LA  - eng
PT  - Journal Article
DEP - 20101015
PL  - United States
TA  - Langmuir
JT  - Langmuir : the ACS journal of surfaces and colloids
JID - 9882736
EDAT- 2010/10/19 06:00
MHDA- 2010/10/19 06:01
CRDT- 2010/10/19 06:00
PHST- 2010/10/19 06:00 [entrez]
PHST- 2010/10/19 06:00 [pubmed]
PHST- 2010/10/19 06:01 [medline]
AID - 10.1021/la103030b [doi]
PST - ppublish
SO  - Langmuir. 2010 Nov 16;26(22):17679-85. doi: 10.1021/la103030b. Epub 2010 Oct 15.