Controlling Chemical Reactivity at Solid−Solution Interfaces by Means of Hydrophobic Magnetic Nanoparticles
- 9 December 2005
- journal article
- review article
- Published by American Chemical Society (ACS) in Langmuir
- Vol. 22 (4), 1409-1419
- https://doi.org/10.1021/la052551e
Abstract
Hydrophobic magnetic nanoparticles are employed to reversibly regulate the hydrophobic/hydrophilic properties of surfaces and to control the electrochemistry and bioelectochemistry at chemically modified electrodes. Selective bioelectrocatalytic transformations at relay-functionalized electrodes are accomplished by the magnetic attractions of the hydrophobic magnetic nanoparticles with coadsorbed hydrophobic redox relays to the electrode. The selective activation of one of two biocatalysts solubilized in the aqueous electrolyte solution in the absence or presence of hydrophobic magnetic nanoparticles results in the specific activation of bioelectrocatalytic processes. The magnetic attraction and retraction of hydrophobic magnetic nanoparticles to and from semiconductor nanoparticle (CdS)-functionalized electrodes enable the control of the photocurrent directions at the electrode from cathodic to anodic directions, respectively. The magnetic attraction of the hydrophobic magnetic nanoparticles to the surfaces is also employed to control biorecognition and biocatalytic transformations at solid supports. The magnetic attraction and retraction of the hydrophobic magnetic nanoparticles to and from the surfaces allow the blockage and activation of DNA hybridization, polymerization, and enzymatic digestion, respectively.Keywords
This publication has 15 references indexed in Scilit:
- Nanomedicine: current status and future prospectsThe FASEB Journal, 2004
- The utility of superparamagnetic contrast agents in MRI: theoretical consideration and applications in the cardiovascular systemNMR in Biomedicine, 2004
- Magnetoswitchable Controlled Hydrophilicity/Hydrophobicity of Electrode Surfaces Using Alkyl-Chain-Functionalized Magnetic Particles: Application for Switchable ElectrochemistryLangmuir, 2004
- Magnetically separable titania-coated nickel ferrite photocatalystMaterials Chemistry and Physics, 2004
- Magnetic nanoparticle design for medical diagnosis and therapyJournal of Materials Chemistry, 2004
- Magnetic Control of Electrocatalytic and Bioelectrocatalytic ProcessesAngewandte Chemie-International Edition, 2003
- High density magnetic recording on protein-derived nanoparticlesJournal of Applied Physics, 2003
- Fully automated immunoassay system of endocrine disrupting chemicals using monoclonal antibodies chemically conjugated to bacterial magnetic particlesAnalytica Chimica Acta, 2003
- Magnetic control of chemical transformations: application for programmed electrocatalysis and surface patterningElectrochemistry Communications, 2002
- Magneto-Switchable BioelectrocatalysisJournal of the American Chemical Society, 2000