Carbon nanotube/gold nanoparticles/polyethylenimine-functionalized ionic liquid thin film composites for glucose biosensing

Jia, Fei; Shan, Changsheng; Li, Fenghua; Niu, Li

doi:10.1016/j.bios.2008.07.057

Cited by 121 publications

(33 citation statements)

References 36 publications

(34 reference statements)

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“…150 A glucose biosensor was fabricated by immobilizing glucose oxidase in thin films of polyethylenimine-functionalized IL containing carbon nanotubes and gold nanoparticles; the novel biosensor showed good electrochemical response to glucose and high enzyme compatibility. 151 A disposable biosensor was constructed from the composite material based on N-butylpyridinium hexafluorophosphate, sodium alginate, and graphite; after optimization, this new biosensor could detect H 2 O 2 in a linear calibration range of 1.0 to 6.0 µmol L −1 with a detection limit of 0.5 µmol L −1 at a signal/noise ratio of 3. 152 www.interscience.wiley.com/jctb with the immobilized peroxidase (tissue from pine nuts) onto chitosan crosslinked with citrate.…”

Section: C) Cross-linked Enzyme Aggregates (Cleas  )mentioning

confidence: 99%

Methods for stabilizing and activating enzymes in ionic liquids—a review

Zhao

2010

J of Chemical Tech & Biotech

339

241

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Ionic liquids (ILs) have evolved as a new type of non-aqueous solvents for biocatalysis, mainly due to their unique and tunable physical properties. A number of recent review papers have described a variety of enzymatic reactions conducted in IL solutions; on the other hand, it is important to systematically analyze methods that have been developed for stabilizing and activating enzymes in ILs. This review discusses the biocatalysis in ILs from two unique aspects (1) factors that impact the enzyme's activity and stability, (2) methods that have been adopted or developed to activate and/or stabilize enzymes in ionic media. Factors that may influence the catalytic performance of enzymes include IL polarity, hydrogen-bond basicity/anion nucleophilicity, IL network, ion kosmotropicity, viscosity, hydrophobicity, the enzyme dissolution, and surfactant effect. To improve the enzyme's activity and stability in ILs, major methods being explored include the enzyme immobilization (on solid support, sol-gel, or CLEA), physical or covalent attachment to PEG, rinsing with n-propanol methods (PREP and EPRP), water-in-IL microemulsions, IL coating, and the design of enzyme-compatible ionic solvents. It is exciting to notice that new ILs are being synthesized to be more compatible with enzymes. To utilize the full potential of ILs, it is necessary to further improve these methods for better enzyme compatibility. This is what has been accomplished in the field of biocatalysis in conventional organic solvents. c 2010 Society of Chemical Industry Keywords: ionic liquid; enzyme activity; enzyme stabilization; immobilization; biocatalysis NOTATION CationsBMIM + = 1-butyl-3-methylimidazolium C 2 OC 1 MIM + = 1-(2-methoxy)ethyl-3-methylimidazolium C 2 OHMIM + = 1-(2-hydroxy)ethyl-3-methylimidazolium EMIM + = 1-ethyl-3-methylimidazolium

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Section: C) Cross-linked Enzyme Aggregates (Cleas  )mentioning

confidence: 99%

Methods for stabilizing and activating enzymes in ionic liquids—a review

Zhao

2010

J of Chemical Tech & Biotech

339

241

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“…The resulting nanohybrids show highly electrocatalytic properties in the direct oxidation of methanol and hence, are a promising catalyst support in fuel cells. A polyethylenimine-functionalized Imi-IL was also applied to fabricate a novel biosensor based on the MWCNT-Au-PIL-glucose oxidase (GOD) thin film at a glass carbon electrode, which retains the good bioactivity of GOD and exhibits a high electrochemical response to glucose [159]. In fact, ILs have been actively utilized for the fabrication of metal nanoparticles because of their high coordination abilities toward metal ions [160].…”

Section: With Carbon Nanotubesmentioning

confidence: 99%

Progress in Imidazolium Ionic Liquids Assisted Fabrication of Carbon Nanotube and Graphene Polymer Composites

et al. 2013

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Carbon nanotubes (CNTs) and graphene sheets are the most promising fillers for polymer nanocomposites due to their superior mechanical, electrical, thermal optical and gas barrier properties, as well as high flame-retardant efficiency. The critical challenge, however, is how to uniformly disperse them into the polymer matrix to achieve a strong interface for good load transfer between the two. This problem is not new but more acute in CNTs and graphene, both because they are intrinsically insoluble and tend to aggregate into bundles and because their surfaces are atomically smooth. Over the past decade, imidazolium ionic liquids (Imi-ILs) have played a multifunctional role (e.g., as solvents, dispersants, stabilizers, compatibilizers, modifiers and additives) in the fabrication of polymer composites containing CNTs or graphene. In this review, we first summarize the liquid-phase exfoliation, stabilization, dispersion of CNTs and graphene in Imi-ILs, as well as the chemical and/or thermal reduction of graphene oxide to graphene with the aid of Imi-ILs. We then present a full survey of the literature on the Imi-ILs assisted fabrication of CNTs and graphene-based nanocomposites with a variety of polymers, including fluoropolymers, hydrocarbon polymers, polyacrylates, cellulose and polymeric ionic liquids. Finally, we give a future outlook in hopes of facilitating progress in this emerging area. OPEN ACCESSPolymers 2013, 5 848

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“…However, the direct electron transfer for oxidation of FADH 2 or reduction of FAD (Shan, Yang, Song, Han, Ivaska, & Niu, 2009) is hard to realize at conventional electrodes, because the FAD is deeply seated in a cavity and not easily accessible for conduction of electrons from the electrode surface. Thus, many CNTsbased nanohybrids, such as MWCNT/AuNPs/ionic liquid (F. Jia, Shan, Li, & Niu, 2008), SWCNT/GOD/Nafion (Lyons & Keeley, 2008), polyaniline (PANI)-coated Fe 3 O 4 nanoparticle/MWCNT (Zhun Liu, Wang, Xie, & Chen, 2008), and palladium/SWCNT (Meng, Jin, Yang, Lu, Zhang, & Cai, 2009), have been explored to immobilize GOD for glucose biosensing. More interestingly, Willner's group demonstrated that aligned reconstituted GOD on the edge of SWCNT as conductive nanoneedles can be linked to an electrode surface for fast glucose response (G. Liu & Lin, 2006).…”

Section: Glucosementioning

confidence: 99%