Self-assembled Dendrimer/Polyelectrolyte Layers on Indium Tin Oxide Electrodes as a Matrix for Immobilization of Gold Nanoparticles and Fluorophores

Kim, Jun Myung; Ju, Heeyoung; Choi, Hongseok; Lee, Junghwa; Kim, Jeongsun; Kim, Jungahn; Kim, Hai Dong; Kim, Joohoon

doi:10.5012/bkcs.2010.31.02.491

Cited by 7 publications

(2 citation statements)

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“…For example, while direct deposition of nanoparticles on ITO substrates has been achieved by electrodeposition or seed-mediated growth approaches, − it has been shown that precise control in the composition and size of nanoparticles is challenging . Nanoparticles have been also immobilized onto ITO surfaces by chemical and physical methods, such as thiol (or amine)–gold binding and layer-by-layer (LbL) assembly techniques, which require intermediate adhesive layers on the surfaces. ,− It is notable that the most frequent reports have concerned Au nanoparticle-modified ITO electrodes mainly because of the limited chemistry available to link nanoparticles to electrode surfaces. However, Au nanoparticle-modified electrodes have often been reported to show poor stability at high potentials due to the oxidation of thiol layers or the oxidation of Au nanoparticles. , Recently, our group reported an electrochemical modification of ITO surfaces with amine-terminated poly(amido amine) (PAMAM) dendrimers encapsulating nanoparticles .…”

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confidence: 99%

Modification of Indium Tin Oxide with Dendrimer-Encapsulated Nanoparticles To Provide Enhanced Stable Electrochemiluminescence of Ru(bpy)₃²⁺/Tripropylamine While Preserving Optical Transparency of Indium Tin Oxide for Sensitive Electrochemiluminescence-Based Analyses

Kim

2014

Anal. Chem.

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Here, we report highly enhanced stable electrogenerated chemiluminescence (ECL) of Ru(bpy)3(2+) (bpy = 2,2'-bipyridyl) with tripropylamine (TPrA) coreactant on indium tin oxide (ITO) electrodes modified with amine-terminated dendrimers encapsulating catalytic nanoparticles while maintaining optical transparency of ITO and feasibility of the modified ITOs to sensitive ECL-based assays. As model systems, we prepared Pt and Au dendrimer-encapsulated nanoparticles (DENs) using amine-terminated sixth-generation poly(amido amine) dendrimers and subsequently immobilized the DENs onto ITO surfaces via electrooxidative grafting of the terminal amines of dendrimers to the surfaces. The resulting DEN-modified ITOs preserved good optical transparency of ITO and exhibited highly catalyzed electrochemical oxidation of Ru(bpy)3(2+)/TPrA, leading to significantly increased ECL emission. Especially, the Pt DEN-modified ITO electrode provides negligible transmittance drop, i.e., only ∼1.99% over the entire visible region, and exhibited not only much enhanced (i.e., ∼213-fold increase compared to ECL obtained from bare ITO) but also stable ECL emission under consecutive potential scans from 0.00 to 1.10 V for 10 cycles, which allowed ∼329 times more sensitive ECL-based analysis of nicotine using the Pt DEN-modified ITO compared with the use of bare ITO.

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mentioning

confidence: 99%

Modification of Indium Tin Oxide with Dendrimer-Encapsulated Nanoparticles To Provide Enhanced Stable Electrochemiluminescence of Ru(bpy)₃²⁺/Tripropylamine While Preserving Optical Transparency of Indium Tin Oxide for Sensitive Electrochemiluminescence-Based Analyses

Kim

2014

Anal. Chem.

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“…Immobilization of polyamidoamine (PAMAM) dendrimers (star-like structures) onto solid surface was reported in a variety of applied and basic sciences [327]. Several immobilization strategies have reported for the modification of solid surface with dendrimers, including chemical and physical methods, such as covalent binding and layer-by-layer (LbL) assembly techniques [328,329]. Recently, Crook's group reported a direct immobilization of hydroxyl terminated PAMAM dendrimers on glassy carbon electrodes (GCEs).…”

Section: Dendrimers: High-performance Nanostructures For Biosensingmentioning

confidence: 99%

Prospects of Nanobiomaterials for Biosensing

Singh

2011

International Journal of Electrochemistry

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Progress and development in biosensor development will inevitably focus upon the technology of the nanomaterials that offer promise to solve the biocompatibility and biofouling problems. The biosensors using smart nanomaterials have applications for rapid, specific, sensitive, inexpensive, in-field, on-line and/or real-time detection of pesticides, antibiotics, pathogens, toxins, proteins, microbes, plants, animals, foods, soil, air, and water. Thus, biosensors are excellent analytical tools for pollution monitoring, by which implementation of legislative provisions to safeguard our biosphere could be made effectively plausible. The current trends and challenges with nanomaterials for various applications will have focus biosensor development and miniaturization. All these growing areas will have a remarkable influence on the development of new ultrasensitive biosensing devices to resolve the severe pollution problems in the future that not only challenges the human health but also affects adversely other various comforts to living entities. This review paper summarizes recent progress in the development of biosensors by integrating functional biomolecules with different types of nanomaterials, including metallic nanoparticles, semiconductor nanoparticles, magnetic nanoparticles, inorganic/organic hybrid, dendrimers, and carbon nanotubes/graphene.

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Enhanced Electrochemiluminescence of Luminol on Indium Tin Oxide Modified with Dendrimer‐Encapsulated Au Nanoparticles

2015

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Enhanced electrochemiluminescence (ECL) of luminol was reported with the use of dendrimer‐encapsulated Au nanoparticle (Au DEN)‐modified ITOs in the presence of hydrogen peroxide, which was applied for sensitive ECL‐based electroanalysis of hydrogen peroxide. The enhanced ECL of luminol in the presence of hydrogen peroxide was attributed to facile electrochemical oxidation of luminol/hydrogen peroxide on the Au DEN‐modified ITOs at potentials as low as ∼0.4 V (vs. Ag/AgCl). Spooling ECL spectroscopy measurements indicated that the enhanced ECL emission of luminol/hydrogen peroxide system on the Au DEN‐modified ITOs originated from excited 3‐aminophthalate as same as that obtained on bare ITOs. Stability of Au DENs on ITO surfaces was also addressed and found to be closely related with the presence of chloride ions in electrolyte solutions.

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Self-assembled Dendrimer/Polyelectrolyte Layers on Indium Tin Oxide Electrodes as a Matrix for Immobilization of Gold Nanoparticles and Fluorophores

Cited by 7 publications

References 20 publications

Modification of Indium Tin Oxide with Dendrimer-Encapsulated Nanoparticles To Provide Enhanced Stable Electrochemiluminescence of Ru(bpy)₃²⁺/Tripropylamine While Preserving Optical Transparency of Indium Tin Oxide for Sensitive Electrochemiluminescence-Based Analyses

Modification of Indium Tin Oxide with Dendrimer-Encapsulated Nanoparticles To Provide Enhanced Stable Electrochemiluminescence of Ru(bpy)₃²⁺/Tripropylamine While Preserving Optical Transparency of Indium Tin Oxide for Sensitive Electrochemiluminescence-Based Analyses

Prospects of Nanobiomaterials for Biosensing

Enhanced Electrochemiluminescence of Luminol on Indium Tin Oxide Modified with Dendrimer‐Encapsulated Au Nanoparticles

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Self-assembled Dendrimer/Polyelectrolyte Layers on Indium Tin Oxide Electrodes as a Matrix for Immobilization of Gold Nanoparticles and Fluorophores

Cited by 7 publications

References 20 publications

Modification of Indium Tin Oxide with Dendrimer-Encapsulated Nanoparticles To Provide Enhanced Stable Electrochemiluminescence of Ru(bpy)32+/Tripropylamine While Preserving Optical Transparency of Indium Tin Oxide for Sensitive Electrochemiluminescence-Based Analyses

Modification of Indium Tin Oxide with Dendrimer-Encapsulated Nanoparticles To Provide Enhanced Stable Electrochemiluminescence of Ru(bpy)32+/Tripropylamine While Preserving Optical Transparency of Indium Tin Oxide for Sensitive Electrochemiluminescence-Based Analyses

Prospects of Nanobiomaterials for Biosensing

Enhanced Electrochemiluminescence of Luminol on Indium Tin Oxide Modified with Dendrimer‐Encapsulated Au Nanoparticles

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Modification of Indium Tin Oxide with Dendrimer-Encapsulated Nanoparticles To Provide Enhanced Stable Electrochemiluminescence of Ru(bpy)₃²⁺/Tripropylamine While Preserving Optical Transparency of Indium Tin Oxide for Sensitive Electrochemiluminescence-Based Analyses

Modification of Indium Tin Oxide with Dendrimer-Encapsulated Nanoparticles To Provide Enhanced Stable Electrochemiluminescence of Ru(bpy)₃²⁺/Tripropylamine While Preserving Optical Transparency of Indium Tin Oxide for Sensitive Electrochemiluminescence-Based Analyses