Cooperativity at the organic/inorganic interface

Zhang, Lingang; Liu, Junfu; Pan, Zhiyu; Lu, Zhiyun

doi:10.1016/s0968-5677(98)00078-9

Cited by 5 publications

(2 citation statements)

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“…That crystal nucleation was promoted by domain boundaries may derive from a number of sources. It has been demonstrated by Brewster angle microscopy 37 and Fourier transform infrared (FTIR) studies 12 that monolayer organization can alter during crystal growth, accommodating to optimize interaction between the surfactant headgroups and the crystal lattice. This process may occur more readily at the boundary between monolayer domains where the fatty acid molecules have greater freedom of movement.…”

Section: Discussionmentioning

confidence: 99%

Study of Calcium Carbonate Precipitation under a Series of Fatty Acid Langmuir Monolayers Using Brewster Angle Microscopy

et al. 2003

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Calcium carbonate was precipitated from a supersaturated calcium bicarbonate solution in association with a series of long-chain fatty acid monolayers, and the location of the growing crystals with respect to the monolayer domain structure was determined by in situ analysis using a Brewster angle microscope (BAM). Increase in the chain length from palmitic acid (C16) to triacontanoic acid (C30) strongly affected crystallization, resulting in changes in the crystal polymorphs and morphologies, in the homogeneity of morphology, and in the distribution of crystals over the monolayer surface. Induction times also increased with longer chain lengths, an effect consistent with the decreased rate of carbon dioxide diffusion through monolayers as a function of increasing thickness. While the palmitic acid films supported the growth of high proportions of aragonite, vaterite, and nonoriented calcite, almost exclusive precipitation of an extremely uniform distribution of oriented, regular triangular calcite crystals was produced under triacontanoic acid films. BAM analysis of the system showed that the crystals preferentially nucleated under condensed domains and at domain boundaries. Nucleation at the domain boundaries was attributed to relaxation of the ordered monolayer structure at the domain interface and freedom of the fatty acid molecules to accommodate the growing nucleus. The changes in crystal morphology observed under the different monolayers were attributed to changes in the monolayer structure as a function of chain length.

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Section: Discussionmentioning

confidence: 99%

Study of Calcium Carbonate Precipitation under a Series of Fatty Acid Langmuir Monolayers Using Brewster Angle Microscopy

et al. 2003

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“…Other reports deal with the deposition of e.g. BaSO 4 [200,201], CaSO 4 [202], metal sulfides [203] and particulate TiO 2 [204].…”

Section: Nucleation Under Langmuir Filmsmentioning

confidence: 99%

From Sol-Gel Processing to Bio-Inspired Materials Synthesis

Löbmann

2007

CNANO

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The improvement of materials performance and their respective processing routes ever has been the driving force for material science and engineering. For the preparation of non-metallic inorganic materials the synthesis from chemical precursors is a field of steadily increasing scientific and industrial importance: Products in a broad variety of compositions can be obtained by sol-gel techniques. The shaping of intermediates allows the specific preparation of many microarchitectural configurations such as powders, fibers, thin films and aerogels. For purely inorganic products the sintering temperatures are low compared to conventional mixed-oxide ceramic processing which enables e.g. the coating of glasses and metals. Hybrid inorganic-organic compositions combine some advantages of polymers and ceramics.Nature has found amazing alternative ways to produce high-performance inorganic-organic composites at ambient temperatures under physiological conditions: Teeth, bone and nacre are self-evident examples for the capability of biomineralization processes.Even though many aspects of the related mechanisms in vivo are not yet fully understood, the utilization of the basic strategies of natural biomineralization has become a challenge to material scientist in an interdisciplinary approach.In this paper the strong points of sol-gel processing are highlighted, its limitations are discussed and related to the unique characteristics of natural biomineralization. Subsequently biomimetic and biologically-inspired material syntheses routes are reviewed which try to compensate the shortcomings of sol-gel techniques.

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Surface modification on nanoscale titanium dioxide by radiation: Preparation and characterization

Tang

et al. 2006

J of Applied Polymer Sci

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Electron beam mutual radiation to induce graft polymerization has been carried out respectively, between nanoscale anatase‐ or rutile‐titanium dioxide particles surface and methyl methacrylate (MMA). The composition and properties of surface modified titanium dioxide were investigated by a number of surface sensitive techniques: X‐ray photoelectron spectrum (XPS), FTIR, X‐ray diffraction (XRD), and NMR. Results of the technological measurements show how surface chemistry is affected throughout the surface modification process, finally leading to a complete and homogeneous vinyl compound overlayer on top of the titanium dioxide samples. In comparison with stereochemical structures of the graft molecular chains and the PMMA induced by radiation polymerization, the surfaces of the oxides are considered to provide a template for the graft polymerization. The grafted titanium dioxide is found to produce a stable colloidal dispersion, in good solvents for the grafted polymer, and the dispersibility of grafted dioxides is influenced by temperature. In addition, the wettability of the surface of titanium dioxide to water is readily controlled by grafting of hydrophilic or hydrophobic polymers. Based on the above results, it is concluded that MMA is covalently linked to the surface of titanium dioxide by a surface modification process. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci, 100: 3510–3518, 2006

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Cooperativity at the organic/inorganic interface

Cited by 5 publications

References 0 publications

Study of Calcium Carbonate Precipitation under a Series of Fatty Acid Langmuir Monolayers Using Brewster Angle Microscopy

Study of Calcium Carbonate Precipitation under a Series of Fatty Acid Langmuir Monolayers Using Brewster Angle Microscopy

From Sol-Gel Processing to Bio-Inspired Materials Synthesis

Surface modification on nanoscale titanium dioxide by radiation: Preparation and characterization

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