Shape Transitions of Self-Assembled Ge Islands on Si(001)

2001 ◽  
Vol 707 ◽  
Author(s):  
Armando Rastelli ◽  
Matthias Kummer ◽  
Hans Von Känel
Keyword(s):  
Substrate Temperature ◽  
Morphological Changes ◽  
Scanning Tunnelling Microscopy ◽  
Scanning Tunnelling ◽  
Tunnelling Microscopy ◽  
Magnetron Sputter ◽  
Self Assembled ◽  
Shape Changes ◽  
Stable Shape ◽  
Shape Transitions

ABSTRACTCoherently strained Ge islands were grown at a substrate temperature of 550°C by magnetron sputter epitaxy on Si (001) and studied by scanning tunnelling microscopy (STM). The shape changes induced by exposure to a Si-flux at 450°C were investigated as a function of the Si-coverage. During Si-capping, multifaceted domes were found to flatten and to transform into {105}-faceted pyramids and subsequently into stepped mounds through intermediate shapes. The observed sequence of morphological changes is induced by Si-Ge intermixing and is shown to be the inverse of that occurring during Ge or Si1-xGex growth on Si (001). The results are interpreted with a model in which the stable shape of an island mainly depends on its volume and composition.

Shape Transitions of Self-Assembled Ge Islands on Si (001)

2001 ◽  
Vol 696 ◽  
Author(s):  
Armando Rastelli ◽  
Matthias Kummer ◽  
Hans von Känel
Keyword(s):  
Substrate Temperature ◽  
Morphological Changes ◽  
Scanning Tunnelling Microscopy ◽  
Scanning Tunnelling ◽  
Tunnelling Microscopy ◽  
Magnetron Sputter ◽  
Self Assembled ◽  
Shape Changes ◽  
Stable Shape ◽  
Shape Transitions

AbstractCoherently strained Ge islands were grown at a substrate temperature of 550°C by magnetron sputter epitaxy on Si (001) and studied by scanning tunnelling microscopy (STM). The shape changes induced by exposure to a Si-flux at 450°C were investigated as a function of the Sicoverage. During Si-capping, multifaceted domes were found to flatten and to transform into {105}-faceted pyramids and subsequently into stepped mounds through intermediate shapes. The observed sequence of morphological changes is induced by Si-Ge intermixing and is shown to be the inverse of that occurring during Ge or Si1-xGex growth on Si (001). The results are interpreted with a model in which the stable shape of an island mainly depends on its volume and composition.

Highlighting functional groups in self-assembled overlayers with specific functionalized scanning tunnelling microscopy tips

2005 ◽  
Vol 16 (11) ◽  
pp. 2596-2600 ◽  
Author(s):  
Cedric Volcke ◽  
Priscilla Simonis ◽  
Paul A Thiry ◽  
Philippe Lambin ◽  
Christine Culot ◽  
...  
Keyword(s):  
Functional Groups ◽  
Scanning Tunnelling Microscopy ◽  
Scanning Tunnelling ◽  
Tunnelling Microscopy ◽  
Self Assembled

Scanning tunnelling microscopy investigations of self-assembled monolayers of poly(3-decyl-thiophene) on graphite

1993 ◽  
Vol 2 (6) ◽  
pp. 295-299 ◽  
Author(s):  
Annalisa Bonfiglio ◽  
Rita Paradiso ◽  
Ermanno Di Zitti ◽  
Davide Ricci ◽  
Alberto Bolognesi ◽  
...  
Keyword(s):  
Scanning Tunnelling Microscopy ◽  
Self Assembled Monolayers ◽  
Scanning Tunnelling ◽  
Assembled Monolayers ◽  
Tunnelling Microscopy ◽  
Self Assembled

scholarly journals Probing functional self-assembled molecular architectures with solution/solid scanning tunnelling microscopy

2018 ◽  
Vol 54 (75) ◽  
pp. 10527-10539 ◽  
Author(s):  
Daling Cui ◽  
Jennifer M. MacLeod ◽  
Federico Rosei
Keyword(s):  
Molecular Recognition ◽  
Small Molecule ◽  
2D Materials ◽  
Scanning Tunnelling Microscopy ◽  
Use Of Self ◽  
Practical Applications ◽  
Molecular Systems ◽  
Scanning Tunnelling ◽  
Tunnelling Microscopy ◽  
Self Assembled

STM is emerging as a tool to elucidate and guide the use of self-assembled molecular systems in practical applications, including small molecule device engineering, molecular recognition and sensing and electronic modification of 2D materials.

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