Crystallography and chemistry of the calcium carbonate polymorph switch in M. edulis shells

Dalbeck, Paul; England, Jennifer; Cusack, Maggie; Lee, Martin; Fallick, Anthony E.

doi:10.1127/0935-1221/2006/0018-0601

Cited by 82 publications

(91 citation statements)

References 31 publications

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“…4A. The ν 2 mode, in particular, reveals the sharp transition between calcite and aragonite, consistent with previous electron (40) and X-ray microscopy (41) investigations.…”

Section: Applied Physical Sciencessupporting

confidence: 90%

Ultrabroadband infrared nanospectroscopic imaging

Bechtel

Muller

Olmon

et al. 2014

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

277

282

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Characterizing and ultimately controlling the heterogeneity underlying biomolecular functions, quantum behavior of complex matter, photonic materials, or catalysis requires large-scale spectroscopic imaging with simultaneous specificity to structure, phase, and chemical composition at nanometer spatial resolution. However, as with any ultrahigh spatial resolution microscopy technique, the associated demand for an increase in both spatial and spectral bandwidth often leads to a decrease in desired sensitivity. We overcome this limitation in infrared vibrational scattering-scanning probe near-field optical microscopy using synchrotron midinfrared radiation. Tip-enhanced localized light-matter interaction is induced by low-noise, broadband, and spatially coherent synchrotron light of high spectral irradiance, and the near-field signal is sensitively detected using heterodyne interferometric amplification. We achieve sub-40-nm spatially resolved, molecular, and phonon vibrational spectroscopic imaging, with rapid spectral acquisition, spanning the full midinfrared (700-5,000 cm) with few cm −1 spectral resolution. We demonstrate the performance of synchrotron infrared nanospectroscopy on semiconductor, biomineral, and protein nanostructures, providing vibrational chemical imaging with subzeptomole sensitivity.any properties and functions of natural or synthetic materials are defined by chemically or structurally distinct phases, domains, or interfaces on length scales of a few nanometers to micrometers. Characterizing these heterogeneities has long driven the development of advanced microscopy techniques, with notable advances in electron (1), photoemission (2), X-ray (3), and superresolution (4) microscopies. Although extremely effective, these techniques have strict sample requirements: either they operate in vacuum, are limited by electron or X-ray beam damage, or rely on labeling with exogenous fluorophores.In contrast, infrared (IR) vibrational spectroscopic imaging is minimally invasive, requires little sample preparation, is applicable in situ and under ambient conditions, and provides intrinsic chemical contrast and spectroscopic identification for a wide range of materials (5), including living cells (6) and tissues (7,8). The spatial resolution, however, is diffraction-limited to 2-10 μm, depending on wavelength. Moreover, high signal-to-noise spectra even at this low resolution are only possible with a source of high spectral irradiance (9). Subwavelength imaging has been achieved to some extent through point-spread function deconvolution (10, 11) and attenuated total reflection techniques (12). However, the micrometer-size wavelength of IR radiation, in general, has fundamentally limited its application for the characterization of essentially any mesoscopic, heterogeneous material where chemical information at the nanoscale is desired.Infrared scattering-scanning near-field microscopy (IR s-SNOM) overcomes the diffraction limit by scattering incident light with the typically metallic tip of an atomic for...

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“…4A. The ν 2 mode, in particular, reveals the sharp transition between calcite and aragonite, consistent with previous electron (40) and X-ray microscopy (41) investigations.…”

Section: Applied Physical Sciencessupporting

confidence: 90%

Ultrabroadband infrared nanospectroscopic imaging

Bechtel

Muller

Olmon

et al. 2014

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

277

282

View full text Add to dashboard Cite

show abstract

“…Studies based on synchrotron microbeam Xray diffraction (XRD) (Di Masi and Sarikaya, 2004), X-ray photoelectron emission spectromicroscopy (X-PEEM) (Metzler et al, 2007;Gilbert et al, 2008) and transmission electron microscopy (TEM) diffraction (SAED) (Gries et al, 2009b) show that tablets stacked along a single column in the nacre of the abalone display similar contrast conditions, i.e., they are co-oriented. Strict co-orientation of up to ten superimposed tablets in Mytilus edulis has been demonstrated by means of electron backscatter diffraction (EBSD) (Dalbeck et al, 2006;England et al, 2007). Our own data also support this view.…”

Section: Introductionsupporting

confidence: 75%

Mineral bridges in nacre

Checa

Cartwright

Willinger

2011

Journal of Structural Biology

166

124

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“…Prismatic and nacreous aragonite differ in microstructure (Wilbur, 1964), crystal growth rates (Carré et al, 2006), organic content (Dalbeck et al, 2006), amino acids and sulfated compounds (Dauphin et al, 2005) and extra-pallial fluid compartments. One or a combination of these factors could have resulted in lower Mg/Ca, S/Ca and V/Ca ratios in the nacreous layer.…”

Section: Possible Influences On In Situ [M]/ca Ratios In Prismatic Anmentioning

confidence: 99%