Self-Assembled Monolayer Formation on Copper: A Real Time Electrochemical Impedance Study

2011 ◽  
Vol 115 (37) ◽  
pp. 18202-18207 ◽  
Author(s):  
V. S. Dilimon ◽  
G. Fonder ◽  
J. Delhalle ◽  
Z. Mekhalif
Keyword(s):  
Real Time ◽  
Electrochemical Impedance ◽  
Self Assembled Monolayer ◽  
Monolayer Formation ◽  
Impedance Study ◽  
Self Assembled

Real-Time Detection of Self-Assembled Monolayer Formation Using CMOS-Based Nanocapacitor Arrays

2021 ◽  
Vol MA2021-02 (57) ◽  
pp. 1941-1941
Author(s):  
Selvaraj Chinnathambi ◽  
Mohammad Saghafi ◽  
Frans Widdershoven ◽  
Serge G Lemay
Keyword(s):  
Real Time ◽  
Self Assembled Monolayer ◽  
Monolayer Formation ◽  
Real Time Detection ◽  
Self Assembled

scholarly journals Development of a Novel Enhanced Biosensor System for Real-Time Monitoring of Fish Stress Using a Self-Assembled Monolayer

Sensors ◽  
2019 ◽  
Vol 19 (7) ◽  
pp. 1518 ◽  
Author(s):  
Haiyun Wu ◽  
Yuzu Fujii ◽  
Toshiki Nakano ◽  
Takafumi Arimoto ◽  
Masataka Murata ◽  
...  
Keyword(s):  
Real Time ◽  
Stress Responses ◽  
Glucose Concentration ◽  
Sensor Response ◽  
Stress Monitoring ◽  
Output Current ◽  
Self Assembled Monolayer ◽  
Biosensor System ◽  
Self Assembled ◽  
Wireless Biosensor

Wireless biosensor systems were developed in our lab for monitoring blood glucose concentrations in fish as an indicator of fish stress. However, uniform immobilization of the enzyme on the surface of the electrode is difficult, so the sensor response is typically reduced at a range of high glucose concentrations during the stress monitoring. In this study, we attempted to enhance sensor response by using a self-assembled monolayer-immobilized enzyme. Glucose oxidase was immobilized on a working electrode modified with a self-assembled monolayer. The proposed biosensor showed a good correlation between the output current and the glucose concentration range of 10–3500 mg dL−1 under an optimized working condition. The dynamic measurement range of this newly developed sensor is significantly improved, especially over a high concentration range, which helps the sensor to achieve better performance in dramatic changes in the stress response of fish. In addition, we used biological samples from test fish and obtained a good correlation coefficient between the sensor output current and the glucose concentration using a conventional method. The proposed wireless biosensor system was also applied to monitor fish stress responses in real time through different stressors and to obtain some precise data that reflect real fish stress responses.

scholarly journals Electrochemistry Study of Permselectivity and Interfacial Electron Transfers of a Branch-Tailed Fluorosurfactant Self-Assembled Monolayer on Gold

Molecules ◽  
2018 ◽  
Vol 23 (11) ◽  
pp. 2998 ◽  
Author(s):  
Shanshan Li ◽  
Qingying Luo ◽  
Zhiqing Zhang ◽  
Guanghui Shen ◽  
Hejun Wu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Electrochemical Impedance ◽  
Click Reaction ◽  
Hydration Shell ◽  
Self Assembled Monolayer ◽  
Tunneling Mechanism ◽  
Assembly Technique ◽  
Hydration Resistance ◽  
Self Assembled ◽  
Electron Transfers

We investigated the permselectivity and interfacial electron transfers of an amphiphilic branch-tailed fluorosurfactant self-assembled monolayer (FS-SAM) on a gold electrode by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The FS-SAM was prepared by a self-assembly technique and a “click” reaction. The barrier property and interfacial electron transfers of the FS-SAM were also evaluated using various probes with different features. The FS-SAM allowed a higher degree of permeation by small hydrophilic (Cl− and F−) electrolyte ions than large hydrophobic (ClO4− and PF6−) ones. Meanwhile, the redox reaction of the Fe(CN)63− couple was nearly completely blocked by the FS-SAM, whereas the electron transfer of Ru(NH3)63+ was easier than that of Fe(CN)63−, which may be due to the underlying tunneling mechanism. For hydrophobic dopamine, the hydrophobic bonding between the FS-SAM exterior fluoroalkyl moieties and the hydrophobic probes, as well as the hydration resistance from the interior hydration shell around the oligo (ethylene glycol) moieties, hindered the transport of hydrophobic probes into the FS-SAM. These results may have profound implications for understanding the permselectivity and electron transfers of amphiphilic surfaces consisting of molecules containing aromatic groups and branch-tailed fluorosurfactants in their structures.

Alkylsiloxane self-assembled monolayer formation guided by nanoimprinted Si and SiO2 templates

2006 ◽  
Vol 89 (15) ◽  
pp. 153121 ◽  
Author(s):  
Amir A. Yasseri ◽  
Shashank Sharma ◽  
Theodore I. Kamins ◽  
Qiangfei Xia ◽  
Stephen Y. Chou ◽  
...  
Keyword(s):  
Self Assembled Monolayer ◽  
Monolayer Formation ◽  
Self Assembled
Sign in / Sign up

Export Citation Format

Share Document