Self-Assembled Nanodisks with Targetlike Multirings Aggregated at the Air−Water Interface

Abstract

In this communication, we report the self-assembly of zirconia by mixing its precursor with another solution containing surfactant as well as gelatin. The resulting zirconia product consists of many disks with a range of diameter from approximately 100 nm to approximately 2 mum. These disks can be assembled inside aqueous systems. Meanwhile the disks rise gradually and eventually form a visible film at the air-water interface. Remarkably, the structure of zirconia disks templated by surfactant has been found to be targetlike multirings with a d spacing of approximately 3.3 nm. We propose that a successful multirings self-assembly depends on two different template-functions from the same surfactant, excellent tenacity of the zirconia layers and the strong ability of the gelatin to stabilize and disperse the disks.

Self-assembled SnO2 colloidal particles and their gas sensing performance to H2, C2H5OH and LPG

“…The strongest diffraction peak is appeared at 2θ = 2.9 ° with a d spacing of 3.0 nm. Actually, the predominant diffraction peaks located at 2θ < 10 ° indicate that those metal oxide films [21][22][23][24] templated by surfactants have well-ordered nanostructures, e g, multiring structure, lamellar structure and mesoporous structure. The d value is regarded as the lamellar spacing or average mesoporous diameter.…”

“…It is well-known that self-assembly [19,20] is a chemical preparation method to produce a variety of functional materials. In our previous work, airwater interfacial metal oxide films with regular nanostructures have been successfully synthesized by using anionic surfactant and protein as template, e g, ZrO 2 fi lms [21,22] and TiO 2 fi lms [23,24] . Therefore, we are inspired to prepare SnO 2 materials by the similar facial self-assembly method.…”

Self-assembly and photocatalytic property of amorphous cubic-like TiO2-ZnO hybrid film

“…The wide-angle XRD pattern of TiO 2 -ZnO film has no obvious diffraction peaks appeared between 10º to 80º, suggesting this film is amorphous. According to literature [12][13][14][15][16][17], the recorded d value corresponding to the strongest XRD peak located at 2θ < 10° means the spacing between high-ordered lamellar nanostructures or the diameter of well-ordered mesoporous nanostructures in analogous surfactant-templated inorganicorganic films. In this work, the low-angle XRD pattern has a diffraction peak appeared at 2θ angle of 4.67º, corresponding to a d value of 1.89 nm.…”

“…An effective preparation method, namely self-assembly technology [9] has been widely applied to direct synthesis of well-ordered structural metallic oxide films. White et al [10,11] and our group [12][13][14][15][16][17] have successfully prepared a number of high-ordered SiO 2 , TiO 2 , ZrO 2 , SnO 2 , TiO 2 -ZrO 2 and ZrO 2 -SnO 2 films by a facial self-assembly method, using surfactants as structure-directing agents and organometallics as precursor under mild chemical reaction conditions. Accordingly, we are inspired to prepare well-ordered TiO 2 -ZnO film by the similar self-assembly method.…”

Synthesis and characterization of the air–water interfacial TiO2/ZrO2 binary oxide film

“…Selfassembly is also widely used in preparing inorganic-organic films with lamellar structure, such as titania-or zirconia-based films with tetradecyltrimethylammonium chloride or sodium dodecyl sulfate [17][18][19]. Our previous work also reported the self-assembly of zirconia nanodisks with multiring structure [20].…”