Monolayer preparation

Sotobayashi FI, Schilling T and Tesche B 1990 Scanning tunnelling microscopy of polyimide monolayers prepared by the Langmuir-Blodgett technique Langmuir 6 1246... 

Stouffer J M and McCarthy T J 1988 Polymer monolayers prepared by the spontaneous adsorption of sulphur-functionalized polystyrene on gold surfaces Macromolecules 2 1204-8... 

FIG. 17 H-A isotherms for C60 on a pure aqueous subphase at 21°C (a) Monolayer prepared by spreading 50 p.L of a 0.1 mM solution in benzene (b) monolayer prepared by spreading 200 p,L and (c) a compression-expansion cycle of a monolayer prepared by spreading 100 p,L of a 0.5 mM solution. (Reproduced with permission from Ref. 232. Copyright 1993 American Chemical Society.)... 

Ishibashi, T, Uetsuka, H. and Onishi, H. (2004) An ordered retinoate monolayer prepared on rutile TiO2(110)./. Phys. Chem. B, 108, 17166-17170. 

Kaifer and coworkers showed interest in the modification of metal nanoparticles with organic monolayers prepared with suitable molecular hosts. They reported the preparation of water-soluble platinum and palladium nanoparticles modified with thiolated /1-cyclodexlrin (/ -CD) [69]. Nanoparticle synthesis was... 

Fio. 23. Area-creep behaviors and bright field images of stearic acid crystalline monolayer prepared by multi-step creep method and continuous compression method. 

Benzene solutions of lignoceric (CH3(CH2)->2COOH) and stearic (CH3(CH2)i6COOH) acids with concentrations of 1 X 10 3 and 3 x 10-3 mol-L1, respectively, were spread on the pure water surface atTsp of 293 K. Since Tsp is below Tm of the lignoceric acid (Tm - 347 K) and the stearic acid (Tm =317 K) monolayers [31] those monolayers are in a crystalline state. The subphase water was purified with the Milli-QII system. The lignoceric acid monolayer was prepared at a surface pressure of 5 mN-m 1 by a continuous compression at a rate of 1.7 X 10 3 nm--molecule 1 s 1. The stearic acid monolayer was prepared at 23 mN-m-1 by the continuous compression method or the multi-step creep method [39]. The multi-step creep method is a monolayer preparation method for which the monolayer is stepwisely compressed up to a... 

AFM observation of lignoceric acid crystalline monolayer prepared by a continuous compression method. 

AFM observation of stearic acid crystalline monolayer prepared by the multi-step creep method. 

Figure 28(a) shows a nonfiltered AFM image of the stearic acid crystalline monolayer which was prepared by the multi-step creep method with a scan area of 5 X 5 nm2. Though scanning was done repeatedly on the stearic acid monolayer prepared at the high surface pressure of 23 mN- nr1 by the multi-step creep method, the monolayer was not damaged by the... 

Figure 31 shows the Tsp dependences of log Ks(max) and ED pattern of the monolayer prepared by the process mentioned above. This monolayer preparation corresponds to the case without a quench effect, because the amorphous monolayer was slowly cooled down to the temperature of 283 K. The ED pattern at 283 K exhibited a crystalline triclinic spot which was apparently different from the ED pattern of an amorphous halo, as shown in Figure 30. The magnitude of log Ksf, ) started to decrease apparently at ca. 300 K without any expression of the maximum log K max). Since the ED patterns at 298 and 303 K were a crystalline triclinic spot and an amorphous halo, respectively, Tm of lithium 10,12-heptacosadiynoate monolayer on the water surface was evaluated to be around 300 K. Tm of the monolayer on the water surface is much lower than that of three-dimensional crystal of 10,12-heptacosadiynoic acid (Tm=342 K). This is reasonable, because the monolayer is thermodynamically less stable than its three-dimensional crystal.

Dendrimers have also been found useful in the construction of thin films containing isolated fullerenes [85, 86]. Such materials could eventually find practical application in sensors and/or optoelectronic devices [87]. Generally, monolayers prepared from C60 are ill-defined due to the aggregation tendency of fullerenes. The covalent attachement of C60 to bulky dendritic frameworks... 

Changes in the collapse pressure of monolayers prepared from mixtures of I and 5 as a function of will, therefore, be ideal. In the presence of interactions, rrc m will deviate, of course, from ideal behavior. Expanding Eq. (1) (or Eq. 5) and neglecting the higher order terms led to... 

Fig. 12. An artist s conception of the compression and polymerization of monolayers prepared from 1 and 4 [163]...

Linear-dichroic spectra of SA monolayers prepared from mixtures of OTS and a cyanine-dye surfactant established the absence of dimerization and the orientation of the chromophore parallel to the substrate [183]. In contrast, the same cyanine dye underwent sandwich-type dimer formation in LB films and had its chromophore oriented perpendicular to the water surface [192]. These results highlight an important difference between LB and SA monolayers. Parameters which determine monolayer formation on an aqueous subphase are also responsible for the orientation and organization of the surfactants therein. Furthermore, the configuration of the surfactants is retained regardless of the structure of the substrate to which the floating monolayer was subsequently transferred to by the LB technique. Conversely, in SA monolayers, surfactant organization is primarily dependent upon the nature of the substrate [183]. 

Importantly, no silver particulate film formation could be observed at the air/liquid interface, either in the chemical or in the electrochemical generation, in the absence of surfactants or under monolayers prepared from positively charged surfactants. 

Monolayers prepared from arachidic acid, bovine-brain phosphatidylserine (16), and n-hexadecyl-4- vinylbenzamido)undecyl hydrogen phosphate (4) Size-quantized CdS, ZnS, PbS, and CuS semi-conductor particulate films generated in situ under monolayers... 

Monolayers prepared from arachidic acid Size-quantified CdS particulate films generated in situ under monolayers... 

Monolayers prepared from DODAB (5) Size-quantized CdSe particulate films... 

Monolayers prepared from Size-quantized CdS, ZnS, PbS, and PbSe... 

Monolayers prepared from TMTTF octadecyl TCNQ and TTF-octadecyl TCNQ on glycerin subphase Surface-pressure/surface-area measurements and in situ conductivity Lateral d.c. conductivity was of the order of 1 Scm"1 741... 

Monolayers prepared either from pre-polymerized surfactants or from polymers. 

Formation and characterization of a well-ordered monolayer prepared by adsorbing thiophene onto Au(l 1 1) (96L6167). Exposure of Au(l 1 1) surfaces to an ethanol solution of thiophene produces a stable SAM (self-assembled monolayer) which is strikingly similar to SAMs obtained by reacting Au(l 11) with alkanethiols or dialkylsulfides. 

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