Atomic force microscopy Langmuir-Blodgett films

P. K. Hansma, Molecular-resolution images of Langmuir-Blodgett films and DNA by atomic force microscopy. Langmuir, 1991,... 

Imae, T. et ah. Phase separation in hybrid Langmuir-Blodgett films of perfluorinated and hydrogenated amphiphiles. Examination by atomic force microscopy, Langmuir, 16, 612, 2000. 

Bourdieu L, Ronsin O and Chatenay D 1993 Molecular positional order in Langmuir-Blodgett films by atomic force microscopy Science 259 798... 

An ordered antibody array has also been assembled on the solid surface by a combination of Langmuir Blodgett (LB) film method and self-assembling method. An ordered monolayer of protein A is deposited on the solid surface by LB method, which is followed by self-assembling of antibody. Individual antigen molecules which are complexed with the antibody array have been quantitated selectively by atomic force microscopy (AFM). 

Norlen L, Gil IP, Simonsen A, Descouts P. Human stramm corneum lipid organization as observed by atomic force microscopy on Langmuir-Blodgett films. J. Struct. Biol. 2007 158 386-400. 

J.A. DeRose, R.M. Leblanc, Scanning Tunneling and Atomic Force Microscopy Studies of Langmuir-Blodgett Films, Surface Sci. Reports 22 (1995) 73. (Review concerning STM and AFM studies of LB films, covering 1987-1994.)... 

In atomic force microscopy (AFM) solid surfaces (this includes also molecular mono- and multilayers on solid supports in the form of Langmuir-Blodgett (or LB) films) are scanned at constant van der Waals forces in the region of 10 9-10 7 N of force. This is done point by point and line by line. A computer processes the images which consist of the data points. 

Sigiyama N., Shimizu A., Nakamura M., Nakagawa Y., Nagasawa Y. and Ishida H. 1998. Molecular-scale structures of Langmuir-Blodgett films of fatty acids observed by atomic force microscopy (II) - cation dependence, Thin Solid Films, 331, 170-175. 

Gaffo, L., C.J.L. Constantino, W.C. Moreira, R.F. Aroca, and O.N. oliveira (2002). Atomic force microscopy and micro-Raman imaging of mixed Langmuir-Blodgett films of ytterbium bisphthalocyanine and stearic acid. Langmuir 18, 3561. 

Keywords Langmuir-Blodgett films Cadmium arachidate Adhesional stability Wettability Atomic force microscopy... 

Fig. 2 Three-dimensional image (5x5 /an ) and a representative cross-sectional profile of the cadmium arachidate bilayer Langmuir-Blodgett LB) film after immersion treatment in water obtained by atomic force microscopy AFM). The vertical distances measured are 5.3 and 5.6 nm...

A comparative study of ultrathin dielectric (an azo-compound) and ferroelectric (copolymer P(VDF-TrFE)) Langmuir-Blodgett (LB) films has been carried out by Electrostatic Force Microscopy (EFM). Films were poled locally by a strong d.c. field applied between a conductive tip of an Atomic Force Microscope (AFM) and the bottom A1 electrode. The electrically poled domain was studied by EFM using a weak a.c. electric field and a lock-in amplifier technique. Two modes, a contact and non-contact ones, allowed for the measurement of field a in the air gap between the film and the tip and the piezoelectric distortion of the film due to the d.c. field aligned spontaneous polarization. Simultaneously the topographic relief of the same area was imaged. The results confirm unequivocally a possibility to switch ferroelectric LB film locally by an AFM tip. 

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