Visualization of the effect of additives on the nanostructures of individual bio-inspired calcite crystals

Ihli, Johannes; Clark, Jesse N.; Kanwal, Nasima; Kim, Yi‐Yeoun; Holden, Mark; Harder, Ross; Tang, Chiu C.; Ashbrook, Sharon E.; Robinson, Ian; Meldrum, Fiona C.

doi:10.1039/c8sc03733g

Cited by 33 publications

(27 citation statements)

References 76 publications

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“…The availability of coherent hard X-rays from synchrotron light sources opens new opportunities for imaging studies of nanomaterials, 13,14 where Bragg coherent Xray diffraction imaging (Bragg CDI) can reveal the strain distribution of single micro-and nano-sized objects in three dimensions and under operando conditions. [15][16][17][18][19][20][21] Here, we investigate a model gold sample under CO oxidation reaction conditions at ambient pressure. Besides oen being considered as a prototypical reaction to study the fundamental concepts of heterogeneous catalysis, this reaction is also of high environmental and societal importance.…”

Section: Introductionmentioning

confidence: 99%

In situ three-dimensional imaging of strain in gold nanocrystals during catalytic oxidation

et al. 2019

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Section: Introductionmentioning

confidence: 99%

In situ three-dimensional imaging of strain in gold nanocrystals during catalytic oxidation

et al. 2019

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“…However, this can only be achieved for nano‐scale crystals, or sections prepared from larger samples, and measurements are commonly made in vacuum. A range of X‐ray based methods have also been widely used, perhaps most notably BCDI, which enables a dislocation and its associated strain field to be visualised down to 10 nm in spatial resolution . The disadvantages of this technique include the requirement for a synchrotron source, the complexity of the data analysis and there are again restrictions on the sample size and level of strain.…”

Section: Discussionmentioning

confidence: 99%

Super‐Resolution Microscopy Reveals Shape and Distribution of Dislocations in Single‐Crystal Nanocomposites

et al. 2019

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With their potential to offer new properties, single crystals containing nanoparticles provide an attractive class of nanocomposite materials. However, to fully profit from these, it is essential that we can characterise their 3D structures, identifying the locations of individual nanoparticles, and the defects present within the host crystals. Using calcite crystals containing quantum dots as a model system, we here use 3D stochastic optical reconstruction microscopy (STORM) to locate the positions of the nanoparticles within the host crystal. The nanoparticles are shown to preferentially associate with dislocations in a manner previously recognised for atomic impurities, rendering these defects visible by STORM. Our images also demonstrate that the types of dislocations formed at the crystal/substrate interface vary according to the nucleation face, and dislocation loops are observed that have entirely different geometries to classic misfit dislocations. This approach offers a rapid, easily accessed, and non‐destructive method for visualising the dislocations present within crystals, and gives insight into the mechanisms by which additives become occluded within crystals.

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“…the characteristic SEM image of PoLi-bCA/CaCl 2 /CO 2 (i.e. after passing CO 2 ), whereby crystals having average dimensions of ≈ 115 × 103 nm and plausibly resembling rhombohedral calcite crystals could be observed [38][39][40][41][42][43]. A significant polydispersity in size was observed with the largest crystal dimensions being ca.…”

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confidence: 93%

Novel Multifunctional Porous Liquid Composite for Recyclable Sequestration, Storage and In-situ Catalytic Conversion of Carbon Dioxide

Bhattacharjee¹,

Kumar²,

SHARMA³

2020

Preprint

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<div><b>Novel Multifunctional Porous Liquid Composite for Recyclable Sequestration, Storage and In-situ Catalytic Conversion of Carbon Dioxide</b> <br></div><div><br></div><div>Archita Bhattacharjee, Raj Kumar and Prof. K. P. Sharma* Department of Chemistry, IIT Bombay, Powai, India <br></div><div>* E-mail: k.sharma@chem.iitb.ac.in <br></div><div><br></div><div>Keywords: Porous liquid composite, mesoporous liquid, hollow silica nanorods, CO<sub>2</sub> capture, CO<sub>2</sub> catalytic conversion<br></div><div><br></div><div>Abstract: Permanent pores combined with fluidity renders flow processability to porous liquids otherwise not seen in porous solids. Although, sequestration of different gases has recently been shown in porous liquids, there is still adearth of studies for deploying in-situ chemical reactionsto convert adsorbed gases into utility chemicals in this phase. Here, a facile method for the design and development of a new class of solvent-less porous liquid composite which, as shown for the first time, can catalyze the conversion of adsorbed gaseous molecules into industrially relevant product, is shown. The recyclable porous liquid composite comprising polymer-surfactant modified hollow silica nanorods and carbonic anhydrase enzyme not onlysequesters (5.5 ccg<sup>-1</sup> at 273 K and 1 atm) and stores CO<sub>2</sub>,but is also capable of driving an in-situ enzymatic reaction for hydration of CO<sub>2</sub> to HCO<sub>3</sub><sup>-</sup> ion, subsequently converting it CaCO<sub>3</sub> due to reaction with pre-dissolved Ca<sup>2+</sup>. Light and electron microscopy combined with x-ray diffraction reveals the nucleation and growth of calcite and aragonite crystals. Moreover, the liquid-like property of the porous composite material can be harnessed by executing the same reaction via diffusion ofcomplimentary Ca<sup>2+</sup> and HCO<sub>3</sub><sup>-</sup> ions through different compartments separated by an interfacial channel.<br></div><div></div>

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Visualization of the effect of additives on the nanostructures of individual bio-inspired calcite crystals

Abstract: Bragg coherent diffraction imaging to visualize the effects of lysine and magnesium on the internal structures of calcite crystals.

Cited by 33 publications

References 76 publications

In situ three-dimensional imaging of strain in gold nanocrystals during catalytic oxidation

In situ three-dimensional imaging of strain in gold nanocrystals during catalytic oxidation

Super‐Resolution Microscopy Reveals Shape and Distribution of Dislocations in Single‐Crystal Nanocomposites

Novel Multifunctional Porous Liquid Composite for Recyclable Sequestration, Storage and In-situ Catalytic Conversion of Carbon Dioxide

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