A highly sensitive, easy-and-rapidly-fabricable microfluidic electrochemical cell with an enhanced three-dimensional electric field

Li, Zhenglong; Cheng, Yingduan; Chande, Charmi; Chatterjee, Sayandev; Basuray, Sagnik

doi:10.1016/j.aca.2022.340488

Cited by 6 publications

(6 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, increasing the distance between electrodes increases the ohmic drop, leading to a concomitant decrease in the current produced during any charge transfer process. 31 Detection of CO 2 in the ionic liquid.-The impedance spectrums of a microfluidic platform with the ionic liquid, [EMIM][2-CNpyr], exposed to a CO 2 /N 2 gas mixture containing different concentrations of CO 2 (in the range of 0 to 50000 ppm) are shown in Fig. 5.…”

Section: Resultsmentioning

confidence: 99%

“…29 The use of microfluidics for developing electrochemical sensors to analyze liquid samples has been widely adopted. It is used in detecting biological analytes like DNA and proteins, 30 heavy metals like Fe 3+ and Hg 2+ , 31 and contaminants like per-and polyfluoroalkyl substances. 32 However, its application in developing chemical gas sensors must be more utilized.…”

mentioning

confidence: 99%

“…The developed microfluidic electrochemical sensor has a non-planar microelectrode configuration, which has performed better z E-mail: sbasuray@njit.edu in previous studies than a planar architecture. 31 Using non-planar architecture allows the penetration of the electric field through the microchannel, thus allowing us to register any perturbation caused by the binding of CO 2 to the RTIL from the entire volume of the channel, which is filled with RTIL. 1-Ethyl-3-methylimidazolium 2cyanopyrolide ([EMIM][2-CNpyr]) is used as the functionalized RTIL, as it has been demonstrated previously 37 to have high CO 2 solubility at low CO 2 partial pressures.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Ionic Liquid-Packed Microfluidic Device with Non-Planar Microelectrode as a Miniaturized Electrochemical Gas Sensor

Kaaliveetil

Lee

et al. 2023

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

Integrating transducer/sensing materials into microfluidic platforms has enhanced gas sensors' sensitivity, selectivity, and response time while facilitating miniaturization. In this manuscript, microfluidics has been integrated with non-planar microelectrode array and functionalized ionic liquids (ILs) to develop a novel miniaturized electrochemical gas sensor architecture. The sensor employs the IL 1-ethyl-3-methylimidazolium 2-cyanopyrolide ([EMIM][2-CNpyr]) as the electrolyte and capture molecule for detecting carbon dioxide (CO2 ). The three-layer architecture of the sensor consists of a microchannel with the IL sandwiched between glass slides containing microelectrode arrays, forming a non-planar structure. This design facilitates electric field penetration through the IL, capturing CO2 binding perturbations throughout the channel volume to enhance sensitivity. CO 2 binding with [EMIM][2-CNpyr] generates carboxylate ([EMIM]+ -CO2- ]), carbamate ([2-CNpyr]-CO2- ]), and pyrrole-2-carbonitrile (2CNpyrH) species, significantly decreasing the conductivity. The viscosity is also increased, leading to a further decrease in conductivity. These cumulative effects increase charge transfer resistance in the impedance spectrum, allowing a linear calibration curve obtained using Langmuir Isotherm. The sensitivity and reproducibility in CO2 detection are demonstrated by two electrode configurations using the calibration curve. The developed sensor offers a versatile platform for future applications.

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Ionic Liquid-Packed Microfluidic Device with Non-Planar Microelectrode as a Miniaturized Electrochemical Gas Sensor

Kaaliveetil

Lee

et al. 2023

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In another approach, microfluidic technology was again coupled with electrochemical detection [ 100 ]. The reported device consisted of an array of interdigitated microelectrodes with a small volume (~4 μL) and the authors studied the effect of the spacing between the electrodes.…”

Section: Microfluidic and Lab-on-chip Devices For Heavy Metal Ions De...mentioning

confidence: 99%

Microfluidic Devices for Heavy Metal Ions Detection: A Review

Filippidou,

Chatzandroulis

2023

Micromachines

View full text Add to dashboard Cite

The contamination of air, water and soil by heavy metal ions is one of the most serious problems plaguing the environment. These metal ions are characterized by a low biodegradability and high chemical stability and can affect humans and animals, causing severe diseases. In addition to the typical analysis methods, i.e., liquid chromatography (LC) or spectrometric methods (i.e., atomic absorption spectroscopy, AAS), there is a need for the development of inexpensive, easy-to-use, sensitive and portable devices for the detection of heavy metal ions at the point of interest. To this direction, microfluidic and lab-on-chip (LOC) devices fabricated with novel materials and scalable microfabrication methods have been proposed as a promising approach to realize such systems. This review focuses on the recent advances of such devices used for the detection of the most important toxic metal ions, namely, lead (Pb), mercury (Hg), arsenic (As), cadmium (Cd) and chromium (Cr) ions. Particular emphasis is given to the materials, the fabrication methods and the detection methods proposed for the realization of such devices in order to provide a complete overview of the existing technology advances as well as the limitations and the challenges that should be addressed in order to improve the commercial uptake of microfluidic and LOC devices in environmental monitoring applications.

show abstract

“…Electrochemical preconcentration is one of the most frequently discussed preconcentration techniques at a controlled potential [ 61 , 62 , 63 , 64 ]. Hybrid SEC techniques also often involve this method to assist the goal of quantifying ultra-trace aqueous target analytes [ 47 , 65 ].…”

Section: Ultraviolet-visible Sec (Uv-vis Sec)mentioning

confidence: 99%

Recent State and Challenges in Spectroelectrochemistry with Its Applications in Microfluidics

Chande

Cheng

et al. 2023

Micromachines

Self Cite

View full text Add to dashboard Cite

This review paper presents the recent developments in spectroelectrochemical (SEC) technologies. The coupling of spectroscopy and electrochemistry enables SEC to do a detailed and comprehensive study of the electron transfer kinetics and vibrational spectroscopic fingerprint of analytes during electrochemical reactions. Though SEC is a promising technique, the usage of SEC techniques is still limited. Therefore, enough publicity for SEC is required, considering the promising potential in the analysis fields. Unlike previously published review papers primarily focused on the relatively frequently used SEC techniques (ultraviolet-visible SEC and surface-enhanced Raman spectroscopy SEC), the two not-frequently used but promising techniques (nuclear magnetic resonance SEC and dark-field microscopy SEC) have also been studied in detail. This review paper not only focuses on the applications of each SEC method but also details their primary working mechanism. In short, this paper summarizes each SEC technique’s working principles, current applications, challenges encountered, and future development directions. In addition, each SEC technique’s applicative research directions are detailed and compared in this review work. Furthermore, integrating SEC techniques into microfluidics is becoming a trend in minimized analysis devices. Therefore, the usage of SEC techniques in microfluidics is discussed.

show abstract

A highly sensitive, easy-and-rapidly-fabricable microfluidic electrochemical cell with an enhanced three-dimensional electric field

Cited by 6 publications

References 46 publications

Ionic Liquid-Packed Microfluidic Device with Non-Planar Microelectrode as a Miniaturized Electrochemical Gas Sensor

Ionic Liquid-Packed Microfluidic Device with Non-Planar Microelectrode as a Miniaturized Electrochemical Gas Sensor

Microfluidic Devices for Heavy Metal Ions Detection: A Review

Recent State and Challenges in Spectroelectrochemistry with Its Applications in Microfluidics

Contact Info

Product

Resources

About