Green Inorganic Chemistry Laboratory Department of Chemistry Bar-Ilan University, Ramat Gan - Israel web: www.ch.biu.ac.il ~ nano.biu.ac.il contact: David.Zitoun@biu.ac.il
Imaging on nano-scale with scanning tunneling microscopy (STM) How it works?
What we measure?
Közelítés
approach
Szonda
tip
minta minta sample Piezo mozgató a Piezo-mover minta x, y, z irányú mozgatására
Szonda – minta kölcsönhatás detector erősségének érzékelője
feedback Visszacsatolás computer Vezérlés
B. Bleaney, Contemp. Phys. 25 (1984) 320
What we can see on STM-image?
felső réteg alsó réteg
G. Binnig, H. Rohrer: Scanning Tunneling Microscopy Helv. Phys. Acta 55 (1982) 726
9 nm x 9 nm
5 nm x 5 nm 1
High-resolution STM imaging 10 nm x 10 nm 1.0 nA, 0.5 V
stearic acid CH3(CH2)16COOH elaidic acid CH3(CH2)7CH=CH(CH2)7COOH
Acknowledgements
oleidic acid CH3(CH2)7CH=CH(CH2)7COOH
Figures and STM-images were partly created at the Chemical Research Center, Hungarian Academy of Sciences by András Paszternák. – paszti@chemres.hu