Study on the self-packing of SnO2 nanoparticles at the air–hydrosol interface and its composite LB films with arachidic acid

The film-forming behavior on the interface between air and hydrosol of Fe2O3 nanoparticles

“…These results mean that the surface of freshly prepared hydrosol of Fe 2 O 3 nanoparticles is not stable, and the smaller the concentration is, the smaller the surface pressure is stabilized at and the shorter the time the hydrosol reaching stable needs. Confirmed by BAM observations, similar as the fresh hydrosol of SnO 2 nanoparticles [18] , a thin layer of film forms on the surface of the fresh hydrosol of Fe 2 O 3 nanoparticles. Under BAM, the fresh 0.05 M Fe 2 O 3 hydrosol is observed to be uniform and no image appears.…”

“…In all cases, the amphiphilic molecules are used to help constructing the LB monolayer or multilayer and the organic components must be removed in the end. In our research, a new phenomenon was discovered [18] . Without any aiding of the amphiphilic molecules, the SnO 2 nanoparticles were found self-packing on the interface between air and hydrosol of SnO 2 nanoparticles forming a film.…”

Fabrication and surface transformation of FePt nanoparticle monolayer

“…It can be seen that the monolayer film was very uniform and the granular structure on the surface reveals the presence of the FePt nanoparticles. Since the chain length of the organic molecule (oleic acid/oleyl amine) should be about 2.2 nm [30,31], and the average size of FePt nanoparticles is found to be approximately 4 nm, so the size of the particles on the surface of the monolayer film is about 4+2 Â 2.2 ¼ 8.4 nm. This estimation is reasonable and is consistent with AFM measurement results.…”

Low-Cost High-Performance SnO2–Cu Electrodes for Use in Direct Ethanol Fuel Cells

“…Tin dioxide (SnO 2 ) is a key material used in photovoltaic cells, lithium batteries, and gas sensors [1][2][3][4][5]. The most widely used methods to make deposits of SnO 2 are spin coating [6], electrodeposition [7], evaporation [8], chemical vapor deposition [9,10], sol-gel processes [11,12], and the pyrolysis of tin compounds [13]. Due to it requiring a low temperature and the high energy that can be generated near electrode surfaces, electrodeposition is an effective process for synthesizing powders and coating films and can be used to prepare complicated surfaces.…”