Development of Highly-Sensitive Electrochemical Measurement System on Dry Chemistry Using Ionic Liquid

2013 ◽  
Vol 50 (12) ◽  
pp. 339-343
Author(s):  
S. Arimoto ◽  
M. Takahashi ◽  
A. Kamei ◽  
T. Yoshioka
Keyword(s):  
Ionic Liquid ◽  
Measurement System ◽  
Electrochemical Measurement ◽  
Highly Sensitive

scholarly journals Highly sensitive optical ion sensor with ionic liquid-based colorimetric membrane/photonic crystal hybrid structure

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Daiki Kawasaki ◽  
Ryoutarou Oishi ◽  
Nao Kobayashi ◽  
Tatsumi Mizuta ◽  
Kenji Sueyoshi ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Photonic Crystal ◽  
Optical Measurement ◽  
Local Density ◽  
Hybrid Structure ◽  
Cell Dynamics ◽  
Ion Sensor ◽  
Ion Sensing ◽  
Highly Sensitive ◽  
Absorption Sensitivity

Abstract An ionic liquid-based thin (~ 1 µm) colorimetric membrane (CM) is a key nano-tool for optical ion sensing, and a two-dimensional photonic crystal slab (PCS) is an important nano-platform for ultimate light control. For highly sensitive optical ion sensing, this report proposes a hybrid of these two optical nano-elements, namely, a CM/PCS hybrid. This structure was successfully fabricated by a simple and rapid process using nanoimprinting and spin-coating, which enabled control of the CM thickness. Optical characterization of the hybrid structure was conducted by optical measurement and simulation of the reflection spectrum, indicating that the light confined in the holes of the PCS was drastically absorbed by the CM when the spectrum overlapped with the absorption spectrum of the CM. This optical property obtained by the hybridization of CM and PCS enabled drastic improvement in the absorption sensitivity in Ca ion sensing, by ca. 78 times compared to that without PCS. Experimental and simulated investigation of the relation between the CM thickness and absorption sensitivity enhancement suggested that the controlled light in the PCS enhanced the absorption cross-section of the dye molecules within the CM based on the enhanced local density of states. This highly sensitive optical ion sensor is expected to be applied for micro-scale bio-analysis like cell-dynamics based on reflectometric Ca ion detection.

Highly Sensitive ?R/R Measurement System for Nano-electro-Mechanical Cantilever Based Bio-sensors

2011 ◽  
Author(s):  
Sandeep Surya ◽  
Sudip Nag ◽  
Avil J. Fernandes ◽  
Sahir Gandhi ◽  
Dilip Agarwal ◽  
...  
Keyword(s):  
Measurement System ◽  
Highly Sensitive

scholarly journals Highly Sensitive Detection of Dopamine at Ionic Liquid Functionalized RGO/ZIF-8 Nanocomposite-Modified Electrode

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Lei Cheng ◽  
Youjun Fan ◽  
Xingcan Shen ◽  
Hong Liang
Keyword(s):  
Ionic Liquid ◽  
Modified Electrode ◽  
Electrocatalytic Activity ◽  
Electrochemical Impedance ◽  
Modified Electrodes ◽  
Differential Pulse ◽  
Zeolitic Imidazolate Framework ◽  
Response Range ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

A hybrid and hierarchical nanocomposite was successfully prepared by the growth of zeolitic imidazolate framework-8 (ZIF-8) on the template of ionic liquid (IL, [Bmim][BF4]) functionalized reduced graphene oxide (IL-RGO). The structure and morphology of the IL-RGO/ZIF-8 nanocomposite were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectrometer (FTIR), and Raman spectroscopy. The results showed that RGO sheets were refrained from restacking by IL, and ZIF-8 nanoparticles grew well on the surface of IL-RGO. Owing to the synergistic effect from large surface area and excellent electrocatalytic activity of ZIF-8 and great electrical conductivity of IL-RGO, a highly sensitive sensor for dopamine (DA) can be obtained. IL-RGO/ZIF-8-modified electrode exhibits good electrocatalytic activity and electroconductive properties towards DA which were investigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS). Compared with bare or IL-RGO-modified electrodes, the IL-RGO/ZIF-8-modified electrode effectively depressed the oxidation overpotential of DA. The linear response range of DA was from 1.0×10−7 to 1.0×10−4 mol/L with a low detection of limit 3.5×10−8 mol/L. In addition, the sensor was shown to provide satisfactory stability for the determination of DA.

Electrospun Spandex Nanofiber Webs with Ionic Liquid for Highly Sensitive, Low Hysteresis Piezocapacitive Sensor

2019 ◽  
Vol 20 (2) ◽  
pp. 337-347 ◽  
Author(s):  
Mohammad Shamim Reza ◽  
Kevin Ray Ayag ◽  
Mi Kyong Yoo ◽  
Kap Jin Kim ◽  
Hongdoo Kim
Keyword(s):  
Ionic Liquid ◽  
Highly Sensitive
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