2010
DOI: 10.1039/b914430g
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Ionophore–gold nanoparticle conjugates for Ag+-selective sensors with nanomolar detection limit

Abstract: We report on the synthesis and trace analytical application of ionophore-gold nanoparticle conjugates as a basis of a new concept in confining ionophores to ion-selective membranes using inert nanoparticle carriers.

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Cited by 55 publications
(33 citation statements)
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“…In particular, functionalized gold nanoparticles (AuNPs) have become emerging material for the detection of Ag + due to their high extinction coefficient and distance-dependent optical properties. To date, cytosine-(C)-rich oligonucleotide, Tween-20, pyridines, and ionophore-functionalized AuNPs have been reported for the detection of Ag + [6][7][8][9]. However, these functionalized AuNPs suffer from low water solubility, multistep organic synthesis, high cost, and unstable structure.…”
Section: Introductionmentioning
confidence: 98%
“…In particular, functionalized gold nanoparticles (AuNPs) have become emerging material for the detection of Ag + due to their high extinction coefficient and distance-dependent optical properties. To date, cytosine-(C)-rich oligonucleotide, Tween-20, pyridines, and ionophore-functionalized AuNPs have been reported for the detection of Ag + [6][7][8][9]. However, these functionalized AuNPs suffer from low water solubility, multistep organic synthesis, high cost, and unstable structure.…”
Section: Introductionmentioning
confidence: 98%
“…The benefits of application of nanostructurized materials can be related to improved/novel type receptors [12][13][14][15][16][17] and exploring these structures as constructional elements [e.g., 2,3,6-10]. Different materials have been tested including carbon nanostructurized materials like carbon nanotubes [e.g., [1][2][3] and recently graphene [18,19], metal nanoparticles including platinum [5], gold modified with tailored ion-selective ligand [20] or thiol-sulfur group containing ligand molecules, e.g. dithizone [21].…”
Section: Introductionmentioning
confidence: 99%
“…dithizone [21]. Introduction of these structures allowed potentiometric determination of analytes that can hardly be accessed using this technique before [e.g., 12,17] and has led to improvement of important parameters of sensing membranes like stability and lifetime [20] or selectivity [21]. In the latter case of presence of e.g.…”
Section: Introductionmentioning
confidence: 99%
“…For example, Gyurcsányi et al [48] fabricated ionophore-AuNP conjugates based on the self-assembly of the Ag + -selective ligand onto the surface of AuNPs. The conjugates were incorporated into the ion-selective membrane to develop the Ag + -ISEs with nanomolar LODs.…”
Section: Ionophore-modified Nanomaterials Dispersed In Ion-selectivementioning
confidence: 99%