Lysozyme mediated calcium carbonate mineralization

Wang, Xiaoqiang; Sun, Hailing; Xia, Yongqing; Chen, Cuixia; Xu, Hai; Shan, Honghong; Lu, Jian R.

doi:10.1016/j.jcis.2008.12.055

Cited by 62 publications

(59 citation statements)

References 36 publications

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“…In vitro vaterite can be synthesized under different experimental conditions [34]. This process has been widely investigated in our previous work, as a model for studying the solution-mediated process of transformation of metastable solid phases [35].…”

Section: Introductionmentioning

confidence: 99%

Effects of initial supersaturation on spontaneous precipitation of calcium carbonate in the presence of charged poly-l-amino acids

Njegić-Džakula

Falini

Brečević

et al. 2010

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Effects of initial supersaturation on spontaneous precipitation of calcium carbonate in the presence of charged poly-l-amino acids

Njegić-Džakula

Falini

Brečević

et al. 2010

Journal of Colloid and Interface Science

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“…Early models to describe the precipitation paths consider the nucleation of different polymorphs and hydrates, which then transform into more stable modifications 17,18 that can also be influenced by the presence of additive molecules. 19,20 New characterization tools such as cryogenic-TEM (cryo-TEM) or X-ray microscopy demonstrate the precipitation starts with particles ∼30 nm in size, which then transform into calcite or vaterite phases, [21][22][23][24] probably via agglomeration mechanisms involving amorphous calcium carbonate prenucleation clusters. 25,26 This has been elegantly studied recently by cryo-TEM for the early formation of the metastable phase vaterite in the presence of stearic acid, in which orientation-dominated growth at the template interface was postulated.…”

Section: Introductionmentioning

confidence: 99%

Contribution of Aggregation to the Growth Mechanism of Seeded Calcium Carbonate Precipitation in the Presence of Polyacrylic Acid

et al. 2010

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Our work investigates the precipitation mechanism of a seeded calcium carbonate reaction, by using cryogenic TEM to observe the early stages of the reaction. The early precipitation of a hydrated phase is proposed as an intermediate phase before transformation into calcite. Thermodynamic modeling in conjunction with pH, surface potential measurements, and colloidal stability modeling demonstrate that calcite growth is dominated by agglomeration. This is in agreement with the cryogenic TEM observations, which suggest oriented attachment dominates early aggregation. The final stage of the reaction is described by a ripening mechanism that is significantly inhibited when high concentrations of polyacrylic acid (PAA) are used. The different concentrations of PAA lead to significant differences in the final particle substructure observed using cross section TEM. At low PAA concentrations, single crystal particles result, coherent with the proposed early oriented attachment mechanism and interfacial energy calculations. A core shell model is proposed for high PAA concentrations, whereas internal ripening of nanosized pores has been observed for low PAA concentrations, suggesting trapped solvent during the rapid initial particle formation at the relatively high supersaturations (S ) 30) investigated.

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“…Finally, hen egg white lysozyme, used as control, did not show a remarkable effect (Figure 6 a-d). This protein is not intramineral, nonetheless it could play an important role also in the calcification of eggshell as has been published recently (Wang et al, 2009). This can be assumed by looking at Figure 6b where 10 mM sodium carbonate was added and a trend was observed; the hydrodynamic radius varies from 200 to 1200 nm in the range of temperatures from 5 to 30ºC compared to other values (Figure 6 c, d), where the random aggregates size distribution was ranging from 10 to 400 nm, when adding 70 mM and 100 mM sodium carbonate respectively.…”

Section: Resultsmentioning

confidence: 79%