Scanning tunnelling microscopy study of a columnar metallomesogen: bis(β-diketonato)palladium(II) complexes on graphite

Su, Ce; Shu, Chia-Lun; Wu, Chengyi

doi:10.1080/02678290210126059

Cited by 5 publications

(2 citation statements)

References 19 publications

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“…In particular, the order of surface organic molecules has a significant impact on important properties such as charge transport between molecules, charge injection, wetting, friction, and optical properties. The surface-induced order of organic molecules can also affect the bulk over comparatively large distances, influencing their structure and electrooptical properties …”

Section: Introductionmentioning

confidence: 99%

STM Study oftrans-Stilbene Self-Organized on the Ag/Ge(111)-(√3 × √3)R30° Surface

Tsai

Wang

et al. 2003

Langmuir

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The interfacial structures of trans-stilbene (TSB) on Ag/Ge(111)-( 3 × 3)R30°were studied by lowtemperature scanning tunneling microscopy (LT-STM) in ultrahigh vacuum (UHV). Stilbene overlayers were prepared by vapor deposition at a substrate temperature of 200 K and imaged after the samples were cooled to 100 K. High-resolution images allow the identification of individual molecules, with TSB appearing with a distinctive dumbbell shape. From in situ observation of the substrate lattice, the TSB monolayers were found to form a (2 × 1) structure. Due to the excellent matching of unit cell length for Ag/Ge( 111)-( 3 × 3)R30°to the molecular length of TSB, the interaction between TSB and the substrate surface plays the controlling role in influencing the structure of the TSB overlayers. A model for the unit cell of TSB monolayers is proposed and discussed.

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Section: Introductionmentioning

confidence: 99%

STM Study oftrans-Stilbene Self-Organized on the Ag/Ge(111)-(√3 × √3)R30° Surface

Tsai

Wang

et al. 2003

Langmuir

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“…The adsorption and self-assembly of organic molecules on metal and semiconductor surfaces have been investigated extensively in the past two decades. In particular, in the area of nanotechnology, surface-induced structure changes as well as the packing rearrangement of organic adsorbates affect the properties of nanodevices. − For example, the electronic properties, including the charge transport between molecules, charge injection, and optical properties, are dependent on the orientation of the molecules relative to the substrate surface, the formation of domain structures, and surface order . It is generally concluded that more ordered materials give rise to better performance of the electronic devices.…”

Section: Introductionmentioning

confidence: 99%

A Scanning Tunneling Microscopy Study of Distyrylbenzene on Ag/Ge(111)-( × )R30°

Tsai

Chou

et al. 2007

Langmuir

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The adsorption and self-organized monolayers of trans,trans-distyrylbenzene (tt-DSB) and cis,cis-distyrylbenzene (cc-DSB) on Ag/Ge(111)-(sqr rt of 3 x sqr rt of 3)R30 degrees (Ag/Ge(111)-sqr rt of 3) were studied by low-temperature scanning tunneling microscopy (STM) in ultrahigh vacuum. tt-DSB and cc-DSB overlayers were prepared by vapor deposition at a substrate temperature of 200 K and imaged after the samples were cooled to 100 K. High-resolution images allow identification of the internal structure of individual tt-DSB molecules with three phenyl rings and their molecular arrangements on the Ag/Ge(111)-sqr rt of 3 surface. It is found that the intermolecular distance between two terminal phenyl rings in tt-DSB is about twice the lattice constant of Ag/Ge(111)-sqr rt of 3. Such a lattice match makes Ag/Ge(111)-sqr rt of 3 an ideal substrate for tt-DSB self-organization and the formation of a (3 x 1) overlayer unit cell. The structural model and the molecule registry corresponding to STM images for the adlayers of tt-DSB on Ag/Ge(111)-sqr rt of 3 are proposed and discussed. For cc-DSB adsorption on Ag/Ge(111)-sqr rt of 3, uniform molecular overlayers with two discernible molecular images corresponding to two major types of cc-DSB conformers were observed. The coexistence of multiple conformers and the mismatch of molecular dimension of cc-DSB with the substrate unit cell length limit the growth of large cc-DSB domains.

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Metallomesogens

Donnio

Guillon

Deschenaux

et al. 2003

Comprehensive Coordination Chemistry II

168

130

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Scanning tunnelling microscopy study of a columnar metallomesogen: bis(β-diketonato)palladium(II) complexes on graphite

Cited by 5 publications

References 19 publications

STM Study oftrans-Stilbene Self-Organized on the Ag/Ge(111)-(√3 × √3)R30° Surface

STM Study oftrans-Stilbene Self-Organized on the Ag/Ge(111)-(√3 × √3)R30° Surface

A Scanning Tunneling Microscopy Study of Distyrylbenzene on Ag/Ge(111)-( × )R30°

Metallomesogens

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