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6923985 
Journal Article 
Adsorption of TTF, TCNQ and TTF-TCNQ on Au(111): An in situ ECSTM study 
Yan HuiJuan; Li ShanShan; Yan CunJi; Chen Qing; Wan LiJun; , 
2009 
1 
Science in China. Series B: Chemistry
ISSN: 1006-9291
EISSN: 1862-2771 
SCIENCE PRESS 
BEIJING 
559-565 
WOS:000266094800004 
The adsorption and adlayer structures of tetrathiofulvalene (TTF), tetracyanoquinodimethane ( TCNQ) and TTF-TCNQ on Au(111) have been systematically investigated by in situ electrochemical scanning tunneling microscopy (ECSTM) and cyclic voltammetry in 0.1 mol.L-1 HClO4. All the three molecules were found to form well-ordered adlayers in the double-layer potential region of Au(111). For TTF and TCNQ adlayers, (6x3) and (4x7) structures have been observed, respectively. A structural transition was observed on TCNQ adlayer at potential negative of 0.08 V vs. the reversible hydrogen electrode (RHE), and induced a new phase with (3 root 3x12) structure. On the other hand, the charge transfer complex, TTF-TCNQ, self-organized into ordered domains with a lamellar structure different from those of the pure TTF and TCNQ adlayers on Au(111). Its packing arrangement was comparable to surface structures of either single crystal or thin film of TTF-TCNQ.