Growth of nanofibrous barium carbonate on calcium carbonate seeds

Homeijer, Sara Jensen; Olszta, Matthew J.; Barrett, Richard A.; Gower, Laurie B.

doi:10.1016/j.jcrysgro.2008.02.009

Cited by 39 publications

(44 citation statements)

References 30 publications

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“…In the absence of the organic matrix, polyelectrolytes can also guide the formation of various hierarchically structured CaP and CaC crystals. Gower and co-workers have fabricated a variety of non-equilibrium (i.e., non-faceted) morphologies of minerals by using PILP as the precursor, including crystal drops [21], thin films/tablets [62,140,141], and fibers [142,143]. With the help of polyelectrolytes, Cölfen and co-workers have made varied CaC mesocrystals (superstructured nanocrystals with a common crystallographic orientation) (see the review of mesocrystals in biominerals [144]).…”

Section: Biomimetic Mineralization In the Presence Of Non-matrix Protmentioning

confidence: 99%

Amorphous Phase Mediated Crystallization: Fundamentals of Biomineralization

et al. 2018

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Many biomineralization systems start from transient amorphous precursor phases, but the exact crystallization pathways and mechanisms remain largely unknown. The study of a well-defined biomimetic crystallization system is key for elucidating the possible mechanisms of biomineralization and monitoring the detailed crystallization pathways. In this review, we focus on amorphous phase mediated crystallization (APMC) pathways and their crystallization mechanisms in bio-and biomimetic-mineralization systems. The fundamental questions of biomineralization as well as the advantages and limitations of biomimetic model systems are discussed. This review could provide a full landscape of APMC systems for biomineralization and inspire new experiments aimed at some unresolved issues for understanding biomineralization.

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Section: Biomimetic Mineralization In the Presence Of Non-matrix Protmentioning

confidence: 99%

Amorphous Phase Mediated Crystallization: Fundamentals of Biomineralization

et al. 2018

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“…This type of process may be defined as organomineralization as discussed in Perry et al (2007) or biologically influenced biomineralization as defined by Dupraz et al (2009). Several studies related to biomimetics have attempted to reproduce the nanofibre shape using template-assisted synthesis and successfully achieved it (Olszta et al, 2004;Homeijer et al, 2008;Zhu et al, 2009). However, it must be pointed out that experimental protocols usually poorly reproduce conditions from the natural environment.…”

Section: Involvement Of An Organic Templatementioning

confidence: 99%

Unravelling the enigmatic origin of calcitic nanofibres in soils and caves: purely physicochemical or biogenic processes?

et al. 2014

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Abstract. Calcitic nanofibres are ubiquitous habits of secondary calcium carbonate (CaCO 3 ) accumulations observed in calcareous vadose environments. Despite their widespread occurrence, the origin of these nanofeatures remains enigmatic. Three possible mechanisms fuel the debate: (i) purely physicochemical processes, (ii) mineralization of rod-shaped bacteria, and (iii) crystal precipitation on organic templates. Nanofibres can be either mineral (calcitic) or organic in nature. They are very often observed in association with needle fibre calcite (NFC), another typical secondary CaCO 3 habit in terrestrial environments. This association has contributed to some confusion between both habits, however they are truly two distinct calcitic features and their recurrent association is likely to be an important fact to help understanding the origin of nanofibres. In this paper the different hypotheses that currently exist to explain the origin of calcitic nanofibres are critically reviewed. In addition to this, a new hypothesis for the origin of nanofibres is proposed based on the fact that current knowledge attributes a fungal origin to NFC. As this feature and nanofibres are recurrently observed together, a possible fungal origin for nanofibres which are associated with NFC is investigated. Sequential enzymatic digestion of the fungal cell wall of selected fungal species demonstrates that the fungal cell wall can be a source of organic nanofibres. The obtained organic nanofibres show a striking morphological resemblance when compared to their natural counterparts, emphasizing a fungal origin for part of the organic nanofibres observed in association with NFC. It is further hypothesized that these organic nanofibres may act as templates for calcite nucleation in a biologically influenced mineralization process, generating calcitic nanofibres. This highlights the possible involvement of fungi in CaCO 3 biomineralization processes, a role still poorly documented. Moreover, on a global scale, the organomineralization of organic nanofibres into calcitic nanofibres might be an overlooked process deserving more attention to specify its impact on the biogeochemical cycles of both Ca and C.

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“…Gower and Tirrell proposed the term ''polymer-induced liquid precursor (PILP) process'' for the formation process of liquid droplet precursors often observed at the early stages in synthetic bioinspired mineralization systems. [27][28][29][30][31][32][33] Although their formation mechanism is still not precisely known, their liquid character is well documented [28,29] and can be used to infiltrate organic scaffolds, such as the nanometer-sized gap zones in collagen [29,34] or demineralized Nacre scaffold. [35] Recently, Gower and coworkers demonstrated that transition bars formed during PILP mineralization process are due to the exclusion of the polymeric impurity into diffusion limited zones as crystallization proceeds.…”

Section: Py181 Microsphere Formation Mechanism: Polymerinduced Liquidmentioning

confidence: 99%

PY181 Pigment Microspheres of Nanoplates Synthesized via Polymer‐Induced Liquid Precursors

Mehltretter

Plüg

et al. 2009

Adv Funct Materials

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Organic pigments are important crystalline substances, and their properties and applications rely on size and shape control. Pigment Yellow 181 (PY181) is an industrial azo pigment that is light and weatherfast and suitable for high temperature processing. One disadvantage is its needle‐like shape in the default β‐phase, which makes the pigment difficult to process in industry, e.g., in polymer melts, where a spherical structure would be ideal. Here, we show for the first time, that polymer‐induced liquid precursor structures can be formed even in association to a chemical reaction. Furthermore, it is demonstrated that biomineralization principles can be exploited for the generation of advanced functional materials, such as pigments with novel complex morphology and different properties. Stable PY181 microspheres of nanoplates in the β‐phase were obtained in mixed solvents of water and isopropanol by direct azo coupling under the directing influence of a designed copolymer additive aminobenzoylaminobenzamide‐acetoacetyl‐poly(ethylene imine)‐block‐poly(ethylene glycol) (ABABA‐acetoacetyl‐PEI‐b‐PEG).

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Growth of nanofibrous barium carbonate on calcium carbonate seeds

Cited by 39 publications

References 30 publications

Amorphous Phase Mediated Crystallization: Fundamentals of Biomineralization

Amorphous Phase Mediated Crystallization: Fundamentals of Biomineralization

Unravelling the enigmatic origin of calcitic nanofibres in soils and caves: purely physicochemical or biogenic processes?

PY181 Pigment Microspheres of Nanoplates Synthesized via Polymer‐Induced Liquid Precursors

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