DIFFERENTIAL PULSE ADSORPTIVE STRIPPING VOLTAMMETRY DETERMINATION OF EPINEPHRINE WITH β-MERCAPTOETHANOL SELF-ASSEMBLED MONOLAYERS MODIFIED ELECTRODE

AbstractThe renewable mercury film electrode, applied for the determination of papaverine traces using differential pulse adsorptive stripping voltammetry (DP AdSV) is presented. The calibration graph obtained for papaverine is linear from 1.25 nM (0.42 µg L−1) to 95 nM (32.2 µg L−1) for a preconcentration time of 60 s, with correlation coefficient of 0.998. For the renewable mercury electrode (Hg(Ag)FE) with a surface area of 9.1 mm2 the detection limit for a preconcentration time of 60 s is 0.7 nM (0.24 µg L−1). The repeatability of the method at a concentration level of the analyte as low as 17 µg L−1, expressed as RSD is 3.3% (n=5). The proposed method was successfully applied and validated by studying the recovery of papaverine from drugs, urine and synthetic solution.

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Selective Determination of Iron(III) in Sea Water by Gold Nanoparticles Self-assembled with N-carboxyl- L-cysteine

Journal of New Materials for Electrochemical Systems ◽

10.14447/jnmes.v17i1.274 ◽

2014 ◽

Vol 17 (1) ◽

pp. 001-004 ◽

Cited By ~ 2

Author(s):

Benzhi Liu ◽

Min Wang

Keyword(s):

Gold Nanoparticles ◽

Detection Limit ◽

Sea Water ◽

Stripping Voltammetry ◽

Differential Pulse ◽

Operational Parameters ◽

Selective Determination ◽

Self Assembled ◽

Optimized Conditions

Application of gold nanoparticles self-assembled with N-carboxyl- L-cysteine for the determination of iron(III) was investigated. Differential pulse adsorptive stripping voltammetry was used to detect iron(III). Various operational parameters were investigated and discussed in terms of their effects on the measurement signals. A linear range from 0.1 nM to 1.8 nM with a detection limit of 0.03 nMwas obtained under optimized conditions. The applicability of the method was successfully tested by determination of iron(III) in sea water samples.

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Revisiting the determination of full steady-state coverage of redox centers on self-assembled monolayers

Electrochemistry Communications ◽

10.1016/j.elecom.2011.12.014 ◽

2012 ◽

Vol 16 (1) ◽

pp. 6-9 ◽

Cited By ~ 10

Author(s):

Olivier Alévêque ◽

Pierre-Yves Blanchard ◽

Tony Breton ◽

Marylène Dias ◽

Christelle Gautier ◽

...

Keyword(s):

Steady State ◽

Self Assembled Monolayers ◽

Assembled Monolayers ◽

Self Assembled ◽

Redox Centers

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Square‐Wave and Differential‐Pulse Adsorptive Stripping Voltammetry for Ultra‐Trace Determination of the Anti‐Angiogenic Drug Thalidomide in the Presence of Concomitant Drugs

Analytical Letters ◽

10.1081/al-200060935 ◽

2005 ◽

Vol 38 (8) ◽

pp. 1259-1274 ◽

Cited By ~ 4

Author(s):

Carlos E. Cardoso ◽

Pércio A. M. Farias ◽

Renata O. R. Martins ◽

Ricardo Q. Aucélio

Keyword(s):

Stripping Voltammetry ◽

Differential Pulse ◽

Adsorptive Stripping Voltammetry ◽

Trace Determination ◽

Square Wave ◽

Ultra Trace

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Mobility of charge carriers in self-assembled monolayers

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.10.235 ◽

2019 ◽

Vol 10 ◽

pp. 2449-2458

Author(s):

Zhihua Fu ◽

Tatjana Ladnorg ◽

Hartmut Gliemann ◽

Alexander Welle ◽

Asif Bashir ◽

...

Keyword(s):

Charge Transport ◽

Charge Carrier Mobility ◽

Charge Carriers ◽

Self Assembled Monolayers ◽

Force Microscopy ◽

Atomic Force ◽

Mobility Of Charge Carriers ◽

Assembled Monolayers ◽

Self Assembled

We present a new approach to study charge transport within 2D layers of organic semi-conductors (OSCs) using atomic force microscopy (AFM)-based lithography applied to self-assembled monolayers (SAMs), fabricated from appropriate organothiols. The extent of lateral charge transport was investigated by insulating pre-defined patches within OSC-based SAMs with regions of insulating SAM made from large band gap alkanethiolates. The new method is demonstrated using a phenyl-linked anthracenethiolate (PAT), 4-(anthracene-2-ylethynyl)benzyl thiolate. I–V characteristics of differently shaped PAT-islands were measured using the AFM tip as a top electrode. We were able to determine a relationship between island size and electrical conductivity, and from this dependence, we could obtain information on the lateral charge transport and charge carrier mobility within the thin OSC layers. Our study demonstrates that AFM nanografting of appropriately functionalized OSC molecules provides a suitable method to determine intrinsic mobilities of charge carriers in OSC thin films. In particular, this method is rather insensitive with regard to influence of grain boundaries and other defects, which hamper the application of conventional methods for the determination of mobilities in macroscopic samples.

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