We first reported that polyvinylpyrrolidone-protected graphene was dispersed well in water and had good electrochemical reduction toward O2 H2O2. With glucose oxidase (GOD) as an enzyme model, we constructed a novel graphene/polyethylenimine-functionalized ionic liquid/GOD biosensor, which achieved the direct electron transfer of GOD, maintained its bioactivity showed potential application for fabrication biosensors with linear response up to 14 mM.

Polydisperse, functionalized, chemically converted graphene (f-CCG) nanosheets, which can be homogeneously distributed into water, ethanol, DMF, DMSO and 3-aminopropyltriethoxysilane (APTS), were obtained via facile covalent functionalization with APTS. The resulting f-CCG nanosheets characterized by FTIR, XPS, TGA, EDX, AFM, SEM, TEM. Furthermore, the as reinforcing components extended silica monoliths. Compressive tests revealed that compressive failure strength toughness of...

Graphene sheets functionalized covalently with biocompatible poly-l-lysine (PLL) were first synthesized in an alkaline solution. PLL-functionalized graphene is water-soluble and biocompatible, which makes it a novel material promising for biological applications. played important role as connectors to assemble these active amino groups of poly-l-lysine, provided very environment further functionalization, such attaching bioactive molecules. As example, amplified biosensor toward H2O2 based...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAll-solid-state sodium-selective electrode based on a calixarene ionophore in poly(vinyl chloride) membrane with polypyrrole solid contactAodhmar. Cadogan, Zhiqiang. Gao, Andrzej. Lewenstam, Ari. Ivaska, and Dermot. DiamondCite this: Anal. Chem. 1992, 64, 21, 2496–2501Publication Date (Print):November 1, 1992Publication History Published online1 May 2002Published inissue 1 November...

A one-step method was developed to fabricate conductive graphene/SnO2 (GS) nanocomposites in acidic solution. Graphite oxides were reduced by SnCl2 graphene sheets the presence of HCl and urea. The reducing process accompanied generation SnO2 nanoparticles. structure composition GS confirmed means transmission electron microscopy, x-ray photoelectron Raman spectroscopy. Moreover, ultracapacitor characteristics studied cyclic voltammograms (CVs) electrical impedance spectroscopy (EIS). CVs...

Abstract Chitosan functionalized graphene was synthesized by a together‐blending and in situ chemical reduction method. UV‐vis, FT‐IR, Raman SEM techniques were used to study the molecular structure morphology of resulting composite. The chitosan‐graphene modified glassy carbon electrode showed high electrocatalytic activity towards oxidations ascorbic acid (AA), dopamine (DA) uric (UA). By using differential pulse voltammetry (DPV) as analytical technique calibration curves for AA, DA UA,...

Abstract Conducting polymers (electroactive conjugated polymers, ECPs) have emerged as one of the most promising transducers for chemical sensors. This is related to unique electrical, electrochemical and optical properties that can be used convert information (concentration, activity, partial pressure) into electrical or signals in solid state. Application potentiometric ion sensors (ion‐selective electrodes, ISEs) reviewed.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSingle-piece all-solid-state ion-selective electrodeJohan. Bobacka, Tom. Lindfors, Mary. McCarrick, Ari. Ivaska, and Andrzej. LewenstamCite this: Anal. Chem. 1995, 67, 20, 3819–3823Publication Date (Print):October 1, 1995Publication History Published online1 May 2002Published inissue 1 October 1995https://doi.org/10.1021/ac00116a034Request reuse permissionsArticle Views1095Altmetric-Citations152LEARN ABOUT THESE METRICSArticle Views are the...

Chemically converted graphene (CCG)/3,4,9,10-perylene tetracarboxylic acid (PTCA)/Au-ionic liquid (Au-IL) composites (CCG/PTCA/Au-IL) have been prepared by a chemical route that involves functionalization of CCG with PTCA followed deposition Au-IL. Transmission electron microscopy revealed well-distributed Au high surface coverage. The identity the hybrid material was confirmed through X-ray diffraction and photoelectron spectroscopy. CCG/PTCA/Au-IL exhibited good electrocatalytic behavior...

Artificial photosynthesis is a promising strategy to convert carbon dioxide into value-added fuels and chemicals with efficient sunlight utilization. Nevertheless, there are many shortcomings, such as high photogenerated electron–hole recombination rate poor light stability, that hinder the further development of artificial photosynthesis. Thus, inspired by natural green plants, 3D spatial reticulation all-solid-state direct Z-scheme photocatalyst manufactured solve above problems using...

All-solid-state ion-selective electrodes were prepared by using poly(3-octylthiophene)(POT) as solid contact material. A film of POT (thickness approximately 0.25 µm) was deposited on a substrate (platinum, gold or glassy carbon) electrochemical polymerization 3-octylthiophene. The layer subsequently coated with an membrane (ISM) to produce solid-contact electrode (SCISE), SCISEs for several ions (Li+, Ca2+ and Cl–) investigated. compositions the membranes same normally used in poly(vinyl...

Electrochemical functionalization of single-walled carbon nanotubes (SWNTs) was one selective, clean, and nondestructive chemical methods. But in previous studies it met difficulties homogeneous electrografting SWNTs large quantities because the reaction often localized on a very thin film (ca. 2 microm). In this report, room-temperature ionic liquid (RTIL) supported three-dimensional network SWNT electrode first utilized to break through barrier. work, were considerably untangled RTILs so...

Stable gold nanoparticles with average size 1.7 nm synthesized by an amine-terminated ionic liquid showed enhanced electrocatalytic activity and high stability.