Self-assembled monolayers of fluorene- and nitrofluorene-terminated thiols on polycrystalline gold electrode: Electrochemical and optical properties

Pak, Faruk; Meral, Kadem; Altundaş, Ramazan; Ekinci, Duygu

doi:10.1016/j.jelechem.2011.01.041

Cited by 16 publications

(12 citation statements)

References 62 publications

(80 reference statements)

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“…To take advantage of the fluorescence emission of PDI derivative 4 , we attempted fluorescence SEC experiments (F‐SEC) on the corresponding SAMs. Although the classical energy‐transfer theory suggests an explicit surface damping mechanism of luminescence in the range of 1–100 Å, several reports have indicated a non‐quenching of fluorescence in SAMs on gold . In this context, despite several attempts in drastic conditions (i.e.…”

Section: Methodsmentioning

confidence: 99%

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Highly Stable Perylenediimide‐Based Self‐Assembled Monolayers Studied with Spectroelectrochemistry

et al. 2016

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Perylenediimide (PDI)‐based self‐assembled monolayers (SAMs) have been studied by using quartz crystal microbalance, X‐ray photoelectron spectroscopy, cyclic voltammetry, and spectroelectrochemistry (SEC). The high stability of PDI‐based SAMs has allowed very low signals to be probed by using absorption and emission SEC and by extracting voltabsorptograms. The wavelengths are reported for the absorption maxima of the PDI, anion radical, and dianion species. In contrast, the magnitudes of the molar extinction coefficient of the reduced forms were not preserved in the SAM. The quenching of PDI fluorescence was confirmed on a gold substrate.

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Section: Methodsmentioning

confidence: 99%

“…Although the classical energytransfer theory suggestsa ne xplicit surface damping mechanism of luminescence in the range of 1-100 , [25] several reports have indicated an on-quenching of fluorescence in SAMs on gold. [3,[26][27][28][29][30] In this context,d espite several attempts in drastic conditions (i.e. throughr insing baths and CV checks, etc.…”

mentioning

confidence: 99%

Highly Stable Perylenediimide‐Based Self‐Assembled Monolayers Studied with Spectroelectrochemistry

et al. 2016

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“…Turning this fact to an advantage, one can track the movement of probe dye molecules normal to the electrode surface while attaining 2D information. Based on these developments, the in situ electrochemical fluorescence studies have found a variety of measurement applications [39][40][41][42]. A rod of cylindrical single crystal Au with a (1 1 1) base with a surface area of A = 0.272 cm 2 was purchased from Techno Chemics Inc.…”

Section: Introductionmentioning

confidence: 99%

Potential-dependent morphological change of n-hexadecane small droplets on a Au(1 1 1) electrode in aqueous solution: A voltammetric and electrochemical fluorescence microscopic study

Morooka

Murakawa

Konomi

et al. 2016

Journal of Electroanalytical Chemistry

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A mesoscopic view of active droplets of an alkane on a Au(1 1 1) electrode was described using the results of voltammetric and in situ electrochemical fluorescence imaging measurements. In situ fluorescence imaging studies revealed that the morphology of an adlayer of liquid n-hexadecane (HD) on a Au(1 1 1) electrode surface is reversibly driven by potential, forming micro-droplets with greater height of the droplet's top at more negative potentials. Spreading of HD to be a continuous liquid film never took place even around pzc and even with the amounts of HD ranging from 10 to 10000 monolayer equivalent. The droplets at negative potentials were smaller than 50 µm in diameter. The total Au electrode area occupied by HD was small even at positive potentials so that quasi-reversible redox reaction of ferri/ferro-cyanide in the solution phase was still observed. The change of the droplet height by the reshaping with the electrode potential was repeatable, and the change took place beyond the double layer thickness region. Highlights  n-Hexadecane (HD) on the Au(1 1 1) electrode surface exists as small droplets but never covers the surface as a continuous liquid film.  The size of HD droplet deposited on a Au(1 1 1) surface by a touching method was smaller than 50 μm in diameter.  The height of the HD droplet top rises beyond the double layer thickness on the electrode surface around-0.55 V.  The HD droplets on the electrode surface are not the obstacle to the quasi-reversible redox reaction of solution-phase ferri/ferro-cyanide.

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“…Separation methods present basic limitations in terms of equipment cost, complexity, sample processing and run times. Among different methodologies used, electrochemical measurements of thiols have attracted considerable interest because of their high sensitivity, simplicity, low cost and feasibility to the development in vivo sensors and chromatographic detectors [21,22]. Various chemically modified electrodes (CMEs) with electrocatalytic properties have been fabricated and applied in the detection of CySH [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

The Electrochemical Behavior of Au/AuNPs/PNA/ZnSe-QD/ACA Electrode Towards CySH Oxidation

et al. 2015

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This work describes the electrochemical behavior of azodicarboxamide (ACA) film immobilized on the surface of penicillamine (PNA)/ZnSe-quantum dot (ZnSe-QD) gold nanoparticle (AuNPs) Au electrode. Electrocatalytic activity of modified electrode toward the oxidation of cysteine (CySH) was investigated. The surface structure and composition of the sensor were characterized by scanning electron microscopy (SEM). Oxidation of CySH on the surface of modified electrode was investigated with cyclic voltammetry, electrochemical impedance spectroscopy (EIS), hydrodynamic voltammetry and chronoamperometry methods. The results show that the PNA/ZnSe-QD/ACA film displays excellent electrochemical catalytic activities towards CySH oxidation. The modified electrode shows reproducible behavior and high level of stability during the electrochemical experiments. Also it has short response time, low detection limit, high sensitivity and low operation potential, which can be used as an amperometric sensor for monitoring of CySH. The proposed modified electrode was successfully used for determination of CySH in real sample such as human serum.

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Self-assembled monolayers of fluorene- and nitrofluorene-terminated thiols on polycrystalline gold electrode: Electrochemical and optical properties

Cited by 16 publications

References 62 publications

Highly Stable Perylenediimide‐Based Self‐Assembled Monolayers Studied with Spectroelectrochemistry

Highly Stable Perylenediimide‐Based Self‐Assembled Monolayers Studied with Spectroelectrochemistry

Potential-dependent morphological change of n-hexadecane small droplets on a Au(1 1 1) electrode in aqueous solution: A voltammetric and electrochemical fluorescence microscopic study

The Electrochemical Behavior of Au/AuNPs/PNA/ZnSe-QD/ACA Electrode Towards CySH Oxidation

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