Rational Design of Functional Oxide Thin Films with Embedded Magnetic or Plasmonic Metallic Nanoparticles

Bahlawane, Naoufal; Kohse‐Höinghaus, Katharina; Weimann, Thomas; Hinze, P.; Röhe, Sarah; Bäumer, Marcus

doi:10.1002/anie.201102489

Cited by 25 publications

(24 citation statements)

References 29 publications

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“…25 Alternatively, inorganic nanoparticles can be embedded within an inorganic matrix, for example by the in situ growth of nanoparticles within porous media such as zeolites, 26 the construction of mesoporous solids in the presence of nanoparticles, 27 adsorption of nanoparticles into porous crystals, 28 the formation of discrete coreshell nanoparticle composites, 29 and in situ growth of nanoparticles during thin film formation. 30 It is emphasized that in creating these composite materials, there is a requirement not only to succeed in embedding nanoparticles within the host matrix, but to control their density and distribution. In the method employed here, the gel matrix plays multiple roles in directing the structure of the product material.…”

Section: Discussionmentioning

confidence: 99%

Bio-inspired formation of functional calcite/metal oxide nanoparticle composites

et al. 2014

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Biominerals are invariably composite materials, where occlusion of organic macromolecules within single crystals can significantly modify their properties. In this article, we take inspiration from this biogenic strategy to generate composite crystals in which magnetite (Fe 3 O 4 ) and zincite (ZnO) nanoparticles are embedded within a calcite single crystal host, thereby endowing it with new magnetic or optical properties. While growth of crystals in the presence of small molecules, macromolecules and particles can lead to their occlusion within the crystal host, this approach requires particles with specific surface chemistries. Overcoming this limitation, we here precipitate crystals within a nanoparticle-functionalised xyloglucan gel, where gels can also be incorporated within single crystals, according to their rigidity. This method is independent of the nanoparticle surface chemistry and as the gel maintains its overall structure when occluded within the crystal, the nanoparticles are maintained throughout the crystal, preventing, for example, their movement and accumulation at the crystal surface during crystal growth. This methodology is expected to be quite general, and could be used to endow a wide range of crystals with new functionalities. IntroductionAdvances in technology demand an ever-increasing degree of control over material structure, properties and function. As the range of properties that can be obtained from monolithic materials is necessarily limited, one potential strategy for the development of new materials is the creation of composites in which two or more dissimilar materials are combined. 5-8In the work described here, we use biominerals, and specifically their occlusion of organic species, as an inspiration to generate composites in which inorganic nanoparticles (magnetite and ZnO) are incorporated within single crystals of calcite (CaCO 3 ). In doing so, we can endow the host crystal with novel properties -here magnetic or optical -while maintaining the intrinsic single crystal character of the parent crystal. It is well recognized that growth of crystals in the presence of organic molecules can lead to the occlusion of both small molecules 9 and macromolecules, 10 and this strategy has been adapted to achieve encapsulation of polymer latexes and copolymer micelles within single crystals of calcite 11,12 and ZnO crystals. 13 However, while this method is experimentally facile, it requires particles with specific surface chemistries, and aggregation of the nanoparticles is a problem in many crystal growth solutions.Notably, some biominerals also occlude fibres, reflecting their growth in a gel-like medium. 8,14,15 Again, an analogous result has also been achieved synthetically, where sponge-like agarose gels were preserved within calcite crystals. 16,17 Indeed, incorporation of the gel is subject to far fewer constraints than isolated particles/ molecules, and effective occlusion can be achieved according to the gel rigidity and the rate of crystal growth. 17 Our methodology there...

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Section: Discussionmentioning

confidence: 99%

Bio-inspired formation of functional calcite/metal oxide nanoparticle composites

et al. 2014

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“…Such improvement provides precise control over the thickness and film composition, and shows high flexibility for designing nanostructure and tuning the particle size of target materials [30]. By using PSE-CVD, Bahlawane et al successfully fabricated functional metal oxide films with embedded superfine metallic nanoparticles for magnetic and plasmatic applications through tailoring the pulse sequences [28].…”

Section: Introductionmentioning

confidence: 99%

“…In view of atom migration, the nanoparticles are rigorously confined at their original sites by the other sort of surrounding particles with little atom migration and aggregation during lithiation/delithiation, which leads to spatially-confined lithiation/delithiation and assures the structure integrity of electrode. To realize the specially designed nano-architectures, a powerful techniquedpulsed spray evaporation chemical vapor deposition (PSE-CVD) is applied for the deposition of multi-oxide nanocomposites [28]. Superior to the conventional CVD mounted with bubbler evaporator, PSE-CVD, like the atomic layer deposition (ALD), is equipped with direct pulsed liquid delivery (DPLD) unit [29].…”

Section: Introductionmentioning

confidence: 99%

Rational design of metal oxide nanocomposite anodes for advanced lithium ion batteries

Yuan

et al. 2015

Journal of Power Sources

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“…A variety of synthetic strategies to supported metal NP are described in the literature [4–7], however the use of single-step routes in which both support and catalytic metal are synthesized together are infrequently reported despite the advantage of fewer processing steps [8]. We have recently reported the successful use of AACVD for the one-step synthesis of metal NPs supported on tungsten oxide, using inorganic metal precursors (H x MCl y , where M = Au, x = 1, y = 4 or M = Pt, x = 2, y = 6) [9, 10].…”

Section: Introductionmentioning

confidence: 99%

Single-step co-deposition of nanostructured tungsten oxide supported gold nanoparticles using a gold–phosphine cluster complex as the gold precursor

Molkenova

Sarip

Sathasivam

et al. 2014

Science and Technology of Advanced Materials

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The use of a molecular gold organometallic cluster in chemical vapour deposition is reported, and it is utilized, together with a tungsten oxide precursor, for the single-step co-deposition of (nanostructured) tungsten oxide supported gold nanoparticles (NPs). The deposited gold-NP and tungsten oxide supported gold-NP are highly active catalysts for benzyl alcohol oxidation; both show higher activity than SiO2 supported gold-NP synthesized via a solution-phase method, and tungsten oxide supported gold-NP show excellent selectivity for conversion to benzaldehyde.

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Rational Design of Functional Oxide Thin Films with Embedded Magnetic or Plasmonic Metallic Nanoparticles

Cited by 25 publications

References 29 publications

Bio-inspired formation of functional calcite/metal oxide nanoparticle composites

Bio-inspired formation of functional calcite/metal oxide nanoparticle composites

Rational design of metal oxide nanocomposite anodes for advanced lithium ion batteries

Single-step co-deposition of nanostructured tungsten oxide supported gold nanoparticles using a gold–phosphine cluster complex as the gold precursor

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