Vertical dipping method

The molecular structure of a Cgo-Pst hyperbranched polymer can be described as in Fig. 20. Cgo-Pst hyperbranched polymer molecules were transferred onto mica chips by the vertical dipping method of L-B him techniques as introduced above. 

It has been shown that surface-modihed C5Q-Pst polymer was synthesized and was transferred onto mica chips by using the vertical dipping method of L-B film techniques. Though the surface was scanned many times, only a small amount of transfer could be found on the surface of the L-B Hlms. L-B films of C5Q-Pst polymer, even with only one layer, showed good microtribological performance. The topography and the order of the hlms are the most important factors influencing the microscale friction and wear. 

LB films of cadmium octadecanoate and other amphiphiles were transferred on a quartz-crystal microbalance (QCM, 9 MHz, AT-cut) as a substrate with a vertical dipping method. Frequencies of the QCM substrate were followed with time in air, after the QCM was raised from the interface. From the time courses of these frequency changes at each dipping cycle, the transfer amount of dry LB films (W ), the incorporated amount of water (W2), and its evaporation speed (v) could be obtained in nanogram level. 

Fig. 11 Polarized absorption spectra of DNA /proflavine/2Ci8-glu-N LB films (88 layers) deposited by a vertical dipping method and b horizontal lifting method...

The DNA-aligned thin film could also be obtained with the LB method, in which anionic DNA strands were transferred with cationic monolayers at the interface using vertical dipping method. DNA was aligned along the dipping directions. 

Fig. 3.5.2 Schematic representation of the vertical dipping method of preparing LB films from compressed monolayers of fatty acids on aqueous subphases of divalent metal ions.

Figure Id. LPE growth systems vertical dipping method.

Specific properties of polysilanes have been linked to the method of synthesis.35 For example, in the case of anionic polymerization of poly[l-(6-methoxy-hexyl)-l,2,3-trimethyldisilanylene] a new type of chromism was induced in the polysilane film by the difference in the surface properties of substrates and was termed a surface-mediated chromism. The polysilane exhibited thermochromism with an absorption maximum at 306 nm at 23°C, but <15°C a band at 328 nm began to appear. A monolayer of the polysilane was transferred onto both a clean hydrophilic quartz plate and a hydrophobic one treated with hexamethyldisilazane by the vertical dipping method. With the hydrophobic plate, a broad UV absorption at 306 nm is obtained, whereas the absorption on a hydrophilic plate shifts to 322 nm. The conformation of the polysilane is preserved by hydrogen bonding between the silica surface and the ether section of the substituent on the hydrophilic plate. The polysilane is attached to the hydrophobic surface only by van der Waals forces, and this weaker interaction would not sustain the thermodynamically unstable conformational state that is attained on the water surface. 

CH, horizontal lifting method V, vertical dipping method. dSilver paste was used as electrodes. 

Deposition of polyamic acid salt was carried out at a surface pressure of 25 dyne/cm onto a appropriate plate by drawing down and up through the air-water interface at a rate of 3-5 mm/min at 20 C (vertical dipping method). 

Merocyanine (MC) LB films of the Y-type were deposited using the conventional vertical dipping method [9]. Since MC dyes exhibit p-type conduction, the Schottky and Ohmic contacts are obtained at the interfaces between the MC LB film and Aluminum (MC/Al) and between the LB film and Silver (MC/Ag), respectively. In this study, Schottky photoelectric cell was constructed as the ATR sample. 

Figure 14.1. Deposition of LB films, (a) Vertical dipping method.

Vapour grown fibers, 624 Variable-range hopping, 761. 766 Vertical dipping method, 729 Vibronic transitions, 467 Vinilogue, 12 Voltage oscillations, 127 W... 

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