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Titolo:
Characterization of the swelling of acrylamidophenylboronic acid-acrylamide hydrogels upon interaction with glucose by faradaic impedance spectroscopy, chronopotentiometry, quartz-crystal microbalance (QCM), and surface plasmon resonance (SPR) experiments
Autore:
Gabai, R; Sallacan, N; Chegel, V; Bourenko, T; Katz, E; Willner, I;
Indirizzi:
Hebrew Univ Jerusalem, Inst Chem, Farkas Ctr Light Induced Proc, IL-91904 Jerusalem, Israel Hebrew Univ Jerusalem Jerusalem Israel IL-91904 -91904 Jerusalem, Israel
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 34, volume: 105, anno: 2001,
pagine: 8196 - 8202
SICI:
1520-6106(20010830)105:34<8196:COTSOA>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
N-ISOPROPYLACRYLAMIDE; CHIRAL DISCRIMINATION; CONDUCTING POLYMERS; PHENYLBORONIC ACID; ARTIFICIAL MUSCLES; PHASE-TRANSITIONS; BORONIC ACID; ELECTRODE; BINDING; GELS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Willner, I Hebrew Univ Jerusalem, Inst Chem, Farkas Ctr Light Induced Proc, IL-91904 Jerusalem, Israel Hebrew Univ Jerusalem Jerusalem Israel IL-91904 salem, Israel
Citazione:
R. Gabai et al., "Characterization of the swelling of acrylamidophenylboronic acid-acrylamide hydrogels upon interaction with glucose by faradaic impedance spectroscopy, chronopotentiometry, quartz-crystal microbalance (QCM), and surface plasmon resonance (SPR) experiments", J PHYS CH B, 105(34), 2001, pp. 8196-8202

Abstract

A m-acrylamidophenylboronic acid-acrylamide copolymer is assembled by electropolymerization on Au-surfaces (Au-electrodes, Au-quartz crystals or Au-glass slides). The electrolysis time controls the film thickness on the electrodes. Addition of glucose to the copolymer film leads to the ligation of the sugar to the boronic acid sites and results in the swelling of the polymer. Faradaic impedance spectroscopy, chronopotentiometry, surface plasmon resonance spectroscopy (SPR), and microgravimetric quartz-crystal-microbalance measurements (QCM) are employed to characterize the swelling of the polymer film upon the binding of glucose. The swelling rate constant, upon theassociation of glucose to the polymer film, is estimated to be k(sw) = 1.7x 10(-4) s(-1), while the shrinking rate constant of the polymer film, upon depletion of glucose, is k(sh) = 2.3 x 10(-5) s(-1). By following the swelling degree of the polymer film at variable glucose concentrations, the polymer matrix is used as an active medium for the sensing of glucose.

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Documento generato il 04/04/20 alle ore 12:01:04