Colouring crystals with inorganic nanoparticles

Kulak, Alexander N.; Yang, Pengcheng; Kim, Yi‐Yeoun; Armes, Steven P.; Meldrum, Fiona C.

doi:10.1039/c3cc47904h

Cited by 46 publications

(69 citation statements)

References 23 publications

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“…1−11 Recently, it has been shown that various nanoparticles ranging from 20 to 250 nm diameter can be incorporated within calcite crystals grown from aqueous solution via the ammonium carbonate diffusion method. 12−15 Nanoparticle occlusion within the host crystal has been confirmed by electron microscopy studies. 12−17 The resulting nanocomposite crystals can exhibit greater hardness compared to calcite of geological origin.…”

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confidence: 73%

Incorporating Diblock Copolymer Nanoparticles into Calcite Crystals: Do Anionic Carboxylate Groups Alone Ensure Efficient Occlusion?

et al. 2016

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New spherical diblock copolymer nanoparticles were synthesized via RAFT aqueous dispersion polymerization of 2-hydroxypropyl methacrylate (HPMA) at 70 °C and 20% w/w solids using either poly(carboxybetaine methacrylate) or poly(proline methacrylate) as the steric stabilizer block. Both of these stabilizers contain carboxylic acid groups, but poly(proline methacrylate) is anionic above pH 9.2, whereas poly(carboxybetaine methacrylate) has zwitterionic character at this pH. When calcite crystals are grown at an initial pH of 9.5 in the presence of these two types of nanoparticles, it is found that the anionic poly(proline methacrylate)-stabilized particles are occluded uniformly throughout the crystals (up to 6.8% by mass, 14.0% by volume). In contrast, the zwitterionic poly(carboxybetaine methacrylate)-stabilized particles show no signs of occlusion into calcite crystals grown under identical conditions. The presence of carboxylic acid groups alone therefore does not guarantee efficient occlusion: overall anionic character is an additional prerequisite.

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confidence: 73%

Incorporating Diblock Copolymer Nanoparticles into Calcite Crystals: Do Anionic Carboxylate Groups Alone Ensure Efficient Occlusion?

et al. 2016

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“…With the ability of incorporating foreign components into the single crystal structure of calcium carbonate, new properties such as coloring and paramagnetism, etc. were also achieved for the synthetic calcium carbonate [20,21].…”

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confidence: 92%

Occlusion of magnetic nanoparticles within calcium carbonate single crystals under external magnetic field

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Huang

Tao

et al. 2017

Pure and Applied Chemistry

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This work studied the growth of calcium carbonate single crystals on top of the monolayer of Fe 3 O 4 @SiO 2 nanoparticles (NPs) with added external magnetic field. It showed that the occlusion process of the NPs into calcium carbonate single crystals varies as the force balance on the NPs shifts. Under no or weak magnetic field, the NPs are relatively mobile, the separation force from the substrate on NPs due to the growing calcium carbonate crystals is larger than the attraction force to the substrate by the magnetic field. The complete occlusion of the NPs into the single crystals is therefore observed. As the magnetic field strength increases, the balance shifts toward the attraction force. The mobility of NPs decreases and partial occlusion of the NPs into the single crystals is gradually observed. The findings in this study offer further insight into the occlusion process experienced by the NPs and also potential approach in engineering the force balance for the design and generation of composite materials that occlude foreign materials into their matrix.

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“…34,54,55 The successful entrapment of polymeric guests within single crystals, primarily of calcite, has been widely demonstrated, 34,35,55,56 relying either on the chemical functionality of the polymers, or in some cases, on the restricted mobility of the guest species. 34,35,57 The encapsulation of inorganic and metallic guest particles has only been achieved by functionalizing the nanoparticles with diblock copolymers, 58,59 or immobilizing them within hydrogel matrices. 39,40 In all of these cases, the encapsulated nanoparticles are surrounded by an insulating organic layer at the interface between the guest nanoparticle and the host crystalline material.…”

Section: Encapsulation Of Particles In Single Crystals the Confinemementioning

confidence: 99%

Physical Confinement Promoting Formation of Cu₂O–Au Heterostructures with Au Nanoparticles Entrapped within Crystalline Cu₂O Nanorods

et al. 2016

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Abstract:Building on the application of cuprite (Cu 2 O) in solar energy technologies and reports of increased optical absorption caused by metal-to-semiconductor energy transfer, a confinement-based strategy was developed to fabricate high aspect ratio, crystalline Cu 2 O nanorods containing entrapped gold nanoparticles (Au nps). Cu 2 O was crystallized within the confines of track-etch membrane pores, where this physical, assembly-based method eliminates the necessity of specific chemical interactions to achieve a well-defined metalsemiconductor interface. With high-resolution scanning/transmission electron microscopy (S/TEM) and tomography, we demonstrate the encasement of the majority of Au nps by crystalline Cu 2 O and show that crystalline Au-Cu 2 O interfaces that are free of extended amorphous regions. Such nanocrystal heterostructures are good candidates for studying the transport physics of metal/semiconductor hybrids for optoelectronic applications.

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Colouring crystals with inorganic nanoparticles

Cited by 46 publications

References 23 publications

Incorporating Diblock Copolymer Nanoparticles into Calcite Crystals: Do Anionic Carboxylate Groups Alone Ensure Efficient Occlusion?

Incorporating Diblock Copolymer Nanoparticles into Calcite Crystals: Do Anionic Carboxylate Groups Alone Ensure Efficient Occlusion?

Occlusion of magnetic nanoparticles within calcium carbonate single crystals under external magnetic field

Physical Confinement Promoting Formation of Cu₂O–Au Heterostructures with Au Nanoparticles Entrapped within Crystalline Cu₂O Nanorods

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Colouring crystals with inorganic nanoparticles

Cited by 46 publications

References 23 publications

Incorporating Diblock Copolymer Nanoparticles into Calcite Crystals: Do Anionic Carboxylate Groups Alone Ensure Efficient Occlusion?

Incorporating Diblock Copolymer Nanoparticles into Calcite Crystals: Do Anionic Carboxylate Groups Alone Ensure Efficient Occlusion?

Occlusion of magnetic nanoparticles within calcium carbonate single crystals under external magnetic field

Physical Confinement Promoting Formation of Cu2O–Au Heterostructures with Au Nanoparticles Entrapped within Crystalline Cu2O Nanorods

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Physical Confinement Promoting Formation of Cu₂O–Au Heterostructures with Au Nanoparticles Entrapped within Crystalline Cu₂O Nanorods