Preparation of a Magnetically Switchable Bio‐electrocatalytic System Employing Cross‐linked Enzyme Aggregates in Magnetic Mesocellular Carbon Foam

Lee, Jun Young; Oh, Eunkeu; Kim, Jaeyun; Kim, Young‐Pil; Jin, Sunmi; Kim, Kwang Ho; Hwang, Yosun; Kwak, Ja Hun; Park, Je‐Geun; Shin, Chae Ho; Kim, Jungbae; Hyeon, Taeghwan

doi:10.1002/anie.200502995

Cited by 139 publications

(64 citation statements)

References 49 publications

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“…After the immobilization of enzymes (glucose oxidase) these particles can be used as magnetically switchable bio-electrocatalytic systems. [197] Hyeon and co-workers have also tried to synthesize monodisperse magnetite nanocrystals and CdSe/ ZnS quantum dots both embedded in mesoporous silica spheres. These mesoporous silica spheres were applied to the uptake and controlled release of ibuprofen drugs.…”

Section: Applications In Catalysis and Biotechnologymentioning

confidence: 98%

Magnetic Nanoparticles: Synthesis, Protection, Functionalization, and Application

2007

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This review focuses on the synthesis, protection, functionalization, and application of magnetic nanoparticles, as well as the magnetic properties of nanostructured systems. Substantial progress in the size and shape control of magnetic nanoparticles has been made by developing methods such as co-precipitation, thermal decomposition and/or reduction, micelle synthesis, and hydrothermal synthesis. A major challenge still is protection against corrosion, and therefore suitable protection strategies will be emphasized, for example, surfactant/polymer coating, silica coating and carbon coating of magnetic nanoparticles or embedding them in a matrix/support. Properly protected magnetic nanoparticles can be used as building blocks for the fabrication of various functional systems, and their application in catalysis and biotechnology will be briefly reviewed. Finally, some future trends and perspectives in these research areas will be outlined.

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Section: Applications In Catalysis and Biotechnologymentioning

confidence: 98%

Magnetic Nanoparticles: Synthesis, Protection, Functionalization, and Application

2007

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“…To prevent leaching of the enzyme during a reaction, it can be crosslinked within the pore structure, a procedure that led to an effective bio-electrocatalyst based on glucose oxidase supported in mesocellular carbon foam. [247] …”

Section: Catalysismentioning

confidence: 97%

“…[163] A similar nanocasting procedure was used to prepare mesoporous carbon foam with well-dispersed a-Fe and Fe 3 O 4 nanoparticles. [247] After the pores of the magnetic composite were loaded with the enzyme glucose oxidase, the material could be employed as a magnetically switchable bio-electrocatalytic system. During cyclic-voltammetric experiments, the current produced by the enzyme-catalyzed oxidation of glucose was controlled by magnetically positioning the composite particles near or away from the electrode surface.…”

Section: Magnetic Materialsmentioning

confidence: 99%

Functionalization of Porous Carbon Materials with Designed Pore Architecture

2009

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Recent progress in syntheses of porous carbons with designed pore architecture has rejuvenated the field of carbon chemistry and promises to provide new advanced materials. In order to reap the full benefit of designer carbons, it is necessary to develop chemistries for functionalizing the porous carbon surfaces. This Review examines methods of functionalizing porous carbon through direct incorporation of heteroatoms in the carbon synthesis, surface oxidation and activation, halogenation, sulfonation, grafting, attachment of nanoparticles and surface coating with polymers. Methods of characterizing the functionalized carbon materials and applications that benefit from functionalized nanoporous carbons with designed architecture are also highlighted.

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“…Similarly, inclusion of glucose oxidase CLEAs in magnetic mesocellular carbon foam was used to construct a magnetically switchable bioelectrocatalytic system. [122] The preparation of CLEAs from CO 2 expanded micellar solutions afforded dendritic CLEAs with tunable nanometer dimensions (7-38 nm). [123] 6 Combi-CLEAs and Catalytic Cascade Processes…”

Section: Cross-linked Enzyme Aggregatesa C H T U N G T R E N N U N G mentioning

confidence: 99%

Enzyme Immobilization: The Quest for Optimum Performance

2007

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Immobilization is often the key to optimizing the operational performance of an enzyme in industrial processes, particularly for use in non-aqueous media. Different methods for the immobilization of enzymes are critically reviewed. The methods are divided into three main categories, viz. (i) binding to a prefabricated support (carrier), (ii) entrapment in organic or inorganic polymer matrices, and (iii) cross-linking of enzyme molecules. Emphasis is placed on relatively recent developments, such as the use of novel supports, e.g., mesoporous silicas, hydrogels, and smart polymers, novel entrapment methods and cross-linked enzyme aggregates (CLEAs).

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Preparation of a Magnetically Switchable Bio‐electrocatalytic System Employing Cross‐linked Enzyme Aggregates in Magnetic Mesocellular Carbon Foam

Abstract: Nanostructured magnetic materials (NMMs) [1] have attracted much attention recently because of their broad biotechnological applications including support matrices for enzyme immobilization, [2] immunoassays, [3] drug delivery, [4] and biosensors.[5]

Cited by 139 publications

References 49 publications

Magnetic Nanoparticles: Synthesis, Protection, Functionalization, and Application

Magnetic Nanoparticles: Synthesis, Protection, Functionalization, and Application

Functionalization of Porous Carbon Materials with Designed Pore Architecture

Enzyme Immobilization: The Quest for Optimum Performance

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