Scanning tunneling microscopy and related techniques for surface analysis

Coratger, R.; Sivel, V.; Ajustron, F.; Beauvillain, J.

doi:10.1016/0968-4328(94)90006-x

Cited by 9 publications

(3 citation statements)

References 178 publications

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“…Just as in electrochemistry, electron transfer plays also a central role in scanning tunneling microscopy, which relies on the tunneling effect as operating principle. − If an STM tip and a conducting sample are separated by only a few angstroms, their electronic wave functions overlap. Upon application of a bias voltage, a tunneling current flows between tip and sample in the direction given by the sign of the applied voltage.…”

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confidence: 99%

Scanning Tunneling Microscopy Using Chemically Modified Tips

1998

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Monolayers of 1-octadecanol, 1-chlorooctadecane, and 1-octadecanoic acid were observed with scanning tunneling microscopy (STM). Chemical modification of STM tips allowed recognition of functional groups in monolayers of 1-octadecanol and 1-octadecanoic acid. Enhanced contrasts for hydroxyl and carboxyl residues were observed with gold tips modified with several aromatic mercaptans that can form hydrogen bonds (4-mercaptopyridine, 4-aminothiophenol, 4-hydroxythiophenol). On the other hand, no such enhancements were observed in monolayers of 1-chlorooctadecane. The enhanced contrasts for the OH and COOH groups seem to be due to electron tunneling through hydrogen bonds formed between the functional groups on tip and sample. These results suggest that tailored modification of STM tips may become a general method for the recognition of specific chemical species and functional groups in STM images.

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confidence: 99%

Scanning Tunneling Microscopy Using Chemically Modified Tips

1998

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“…Initially, STM was used for the observation of semiconductors, inorganic molecules and metal surfaces. [21][22][23] Isolated organic molecules have subsequently been targeted for analysis on a surface under vacuum at low temperatures. 24 To overcome environmental limitations, 2D organic monolayers either chemisorbed or physisorbed on a conductive substrate were fabricated to adequately immobilize the molecules onto the substrate; these monolayers were subsequently observed under ambient conditions or at the solid/liquid interface.…”

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confidence: 99%

Formation of 2D structures and their transformation by external stimuli: a scanning tunneling microscopy study

Kikkawa

2012

Polym J

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We present a review of our recent research on the formation of two-dimensional (2D) nanopatterns via self-assembly and their transformations by external stimuli. The proper design and synthesis of functional molecules and the ability to follow their integrations on a surface would allow the effective use of their nanofunctions to produce novel nanomaterials and devices. In this context, we synthesized stimuli-responsive molecules that contain alkyl chain units, which act as not only the adsorption unit onto the substrate but also as the intermolecular interaction site. The 2D molecular arrangements were then directly visualized using scanning tunneling microscopy at the solid/liquid interface. Thermal treatment, metal coordination and ultraviolet irradiation induced chemical structural conversions of the individual molecules, which resulted in the transformations of the 2D structures.

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“…Κατά τη διάρκεια της σάρωσης η δύναμη στην ακίδα κρατείται σταθερή με μια επάνω-κάτω κίνηση της ακίδας, που παρέχει τις τοπογραφικές πληροφορίες. Το πλεονέκτημα του μικροσκοπίου AFM είναι ότι μπορεί να χρησιμοποιηθεί και σε μη αγώγιμα δείγματα [Skog 1998, Coratger 1994.…”

Section: μικροσκοπία ατομικών δυνάμεων (Afm)unclassified

Συμβολή Στον Χαρακτηρισμό Των Μεμβρανών: Εκτίμηση Της Υδροφοβικότητας Με Χρησιμοποίηση Διαλυμάτων Επιφανειακά Ενεργών Ουσιών

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Scanning tunneling microscopy and related techniques for surface analysis

Cited by 9 publications

References 178 publications

Scanning Tunneling Microscopy Using Chemically Modified Tips

Scanning Tunneling Microscopy Using Chemically Modified Tips

Formation of 2D structures and their transformation by external stimuli: a scanning tunneling microscopy study

Συμβολή Στον Χαρακτηρισμό Των Μεμβρανών: Εκτίμηση Της Υδροφοβικότητας Με Χρησιμοποίηση Διαλυμάτων Επιφανειακά Ενεργών Ουσιών

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