Nanoscale effects of strontium on calcite growth: An in situ AFM study in the absence of vital effects

Wasylenki, Laura E.; Dove, Patricia M.; Wilson, D. S.; Yoreo, James J. De

doi:10.1016/j.gca.2004.12.019

Cited by 122 publications

(130 citation statements)

References 38 publications

Supporting

Mentioning

111

Contrasting

Order By: Relevance

“…The AFM images were collected by using scan rates of 5-20 Hz and a resolution of 512 ϫ 512, while minimizing tip-surface force interactions during the flow-through of the growth solutions to minimize artifactual effects on step edge morphology and measured velocities (20). Negative (acute) step velocities mirrored those obtained for positive (obtuse) steps, although, as in previous reports, the speeds remained lower and showed greater variability for the acute steps (19,41). The effects of peptides on calcite growth were measured in situ by using AFM measurements of the surface for a series of peptides bearing solutions at a fixed supersaturation of 0.92.…”

Section: Methodsmentioning

confidence: 76%

“…For example, because impurity contents in calcites are sensitive to growth rate (19,41), native biomolecules may indirectly impact the compositional signatures of some biogenic calcites that are currently used to interpret formation of paleoenvironments. These findings also provide an avenue for designing the structural and chemical features of synthetic molecules that will allow modulation of growth rates with a degree of control that is currently expressed only in biogenic minerals.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Role of molecular charge and hydrophilicity in regulating the kinetics of crystal growth

Elhadj

Yoreo

Hoyer

et al. 2006

Proc. Natl. Acad. Sci. U.S.A.

244

323

View full text Add to dashboard Cite

The composition of biologic molecules isolated from biominerals suggests that control of mineral growth is linked to biochemical features. Here, we define a systematic relationship between the ability of biomolecules in solution to promote the growth of calcite (CaCO 3) and their net negative molecular charge and hydrophilicity. The degree of enhancement depends on peptide composition, but not on peptide sequence. Data analysis shows that this rate enhancement arises from an increase in the kinetic coefficient. We interpret the mechanism of growth enhancement to be a catalytic process whereby biomolecules reduce the magnitude of the diffusive barrier, E k, by perturbations that displace water molecules. The result is a decrease in the energy barrier for attachment of solutes to the solid phase. This previously unrecognized relationship also rationalizes recently reported data showing acceleration of calcite growth rates over rates measured in the pure system by nanomolar levels of abalone nacre proteins. These findings show that the growth-modifying properties of small model peptides may be scaled up to analyze mineralization processes that are mediated by more complex proteins. We suggest that enhancement of calcite growth may now be estimated a priori from the composition of peptide sequences and the calculated values of hydrophilicity and net molecular charge. This insight may contribute to an improved understanding of diverse systems of biomineralization and design of new synthetic growth modulators.biomineral ͉ calcite ͉ proteins

show abstract

Section: Methodsmentioning

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Role of molecular charge and hydrophilicity in regulating the kinetics of crystal growth

Elhadj

Yoreo

Hoyer

et al. 2006

Proc. Natl. Acad. Sci. U.S.A.

244

323

View full text Add to dashboard Cite

show abstract

“…Although step-pinning and isomorphic impurity incor poration models represent a valuable description of crystal growth inhibition, recent AFM observations of crystal sur faces growing in the presence of impurities have sho\Vll that the nano-scale mechanisms of growth inhibition seem to be more complex than expected [4,[15][16][17][18][19][20]. In particular, growth of the first monolayers from an "impure" aqueous solution on a pre-existing crystal face frequently shows an anomalous kinetics, which is difficult to explain only on the basis of the classic models.…”

Section: Introductionmentioning

confidence: 99%

The effect of CO32- on the growth of barite {0 0 1} and {2 1 0} surfaces: An AFM study

et al. 2006

View full text Add to dashboard Cite

The growth of barite {O 0 I } and {2 I O} faces from aqueous solutions moderately supersaturated with respect to barite ({Jbarite ;::: :; 12 for experiments on {O 01} surfaces and {Jbarile ;::: :; 7 for experiments on {21 O} surfaces) and bearing different concentrations of carbonate has been studied in situ using an atomic force microscope (AFM). Nanoscopic observations show that, above a certain carbonate concen tration threshold in the aqueous solution, the advancement of mono layers (�3.5A in height) on barite {0 01} and (210} surfaces is strongly inhibited. However, inhibition never affects the growth of the first monolayer, whose growth rate increases in the presence of carbonate. In contrast, the second monolayer growth rate decreases as the concentration of carbonate in the solution increases. For high carbonate concentrations in the solution, growth stops after the formation of the first monolayer. While on barite {O 0 I } faces, the for mation of a second monolayer does not occur for carbonate concentrations higher than 0. 2 mM, on barite (21 O} faces the complete inhibition of the second monolayer is observed for carbonate concentrations higher than 0.05 mM. Once growth on {O 0 I} or {21 O} faces is completely inhibited, i. e. such surfaces are in the "dead zone", growth can be recovered by increasing supersaturation. In order to study the recovery behaviour of barite {O 0 I } and (2 I O} faces from the "dead zone", an additional series of AFM experiments have been conducted. In these experiments, carbonate-free aqueous solutions with increasing supersaturations with respect to barite were passed over (00 I} and (21 O} surfaces previously "poisoned" with carbonate. Our experimental results show that the recovery of growth on barite {O O I} faces requires an important increase of the solution supersaturation. In contrast, the recovery of barite {21 O} surface growth does not require any supersaturation increase, but spontaneously occurs in a few minutes. Our observations of inhibition and growth recovery on barite surfaces at a nano-scale are discussed and compared with the descriptions given by the classical crystal growth inhibition models.

show abstract

“…Previous molecular studies have demonstrated that inorganic ions, [9][10][11] amino acids [5,6] and polyAsp peptides [12] predominately interact with the step edges of growing hillocks on the *To whom correspondence should be addressed. E-mail: qiu2@llnl.gov.…”

mentioning

confidence: 99%

Acceleration of Calcite Kinetics by Abalone Nacre Proteins

et al. 2005

View full text Add to dashboard Cite

Abalone shell nacre proteins act as surfactants to promote ion attachment at calcite steps, causing acceleration of the molecular‐scale kinetics of calcite crystal growth. The proteins modify the shape of growing calcite (see Figure) through step‐specific interactions, even though the proteins are larger than the atomic‐scale steps. Understanding of crystal‐growth control by interactions with proteins may give better control of new crystalline materials.

show abstract

Nanoscale effects of strontium on calcite growth: An in situ AFM study in the absence of vital effects

Cited by 122 publications

References 38 publications

Role of molecular charge and hydrophilicity in regulating the kinetics of crystal growth

Role of molecular charge and hydrophilicity in regulating the kinetics of crystal growth

The effect of CO32- on the growth of barite {0 0 1} and {2 1 0} surfaces: An AFM study

Acceleration of Calcite Kinetics by Abalone Nacre Proteins

Contact Info

Product

Resources

About