Novel Furochromenone based Dual Channel Sensors for Selective Detection of Cu2+with Potential Applications in Sample Monitoring, Membrane Sensing and Photo-printing

2016 ◽  
Vol 1 (2) ◽  
pp. 277-284 ◽  
Author(s):  
Manoj Kumar ◽  
Lokesh Kumar Kumawat ◽  
Vinod Kumar Gupta ◽  
Anuj Sharma
Keyword(s):  
Selective Detection ◽  
Dual Channel ◽  
Potential Applications

Dynamic dielectric properties characterization of tapered dielectrophoresis microelectrodes for selective detection and rapid manipulation of cells

2020 ◽  
Vol 37 (4) ◽  
pp. 189-198
Author(s):  
Muhamad Ramdzan Buyong ◽  
Farhad Larki ◽  
Celine Elie Caille ◽  
Norazreen Abd Aziz ◽  
Ahamad Ghadafi Ismail ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Clear Correlation ◽  
Selective Detection ◽  
Blood Components ◽  
Label Free ◽  
Content Type ◽  
Protein Toxin ◽  
Polarization Factor ◽  
Potential Applications

Purpose This paper aims to present the dielectrophoresis (DEP) force (FDEP), defined as microelectrofluidics mechanism capabilities in performing selective detection and rapid manipulation of blood components such as red blood cells (RBC) and platelets. The purpose of this investigation is to understand FDEP correlation to the variation of dynamic dielectric properties of cells under an applied voltage bias. Design/methodology/approach In this paper, tapered design DEP microelectrodes are used and explained. To perform the characterization and optimization by analysing the DEP polarization factor, the change in dynamic dielectric properties of blood components are observed according to the crossover frequency (fxo) and adjustment frequency (fadj) variation for selective detection and rapid manipulation. Findings Experimental observation of dynamic dielectric properties change shows clear correlation to DEP polarization factor when performing selective detection and rapid manipulation. These tapered DEP microelectrodes demonstrate an in situ DEP patterning efficiency more than 95%. Research limitations/implications The capabilities of tapered DEP microelectrode devices are introduced in this paper. However, they are not yet mature in medical research studies for various purposes such as identifying cells and bio-molecules for detection, isolation and manipulation application. This is because of biological property variations that require further DEP characterization and optimization. Practical implications The introduction of microelectrofluidics using DEP microelectrodes operate by selective detecting and rapid manipulating via lateral and vertical forces. This can be implemented on precision health-care development for lab-on-a-chip application in microfluidic diagnostic and prognostic devices. Originality/value This study introduces a new concept to understand the dynamic dielectric properties change. This is useful for rapid, label free and precise methods to conduct selective detection and rapid manipulation of mixtures of RBC and platelets. Further, potential applications that can be considered are for protein, toxin, cancer cell and bacteria detections and manipulation. Implementation of tapered DEP microelectrodes can be used based on the understanding of dynamic dielectric properties of polarization factor analysis.

Arene-based fluorescent probes for the selective detection of iron

RSC Advances ◽  
2015 ◽  
Vol 5 (118) ◽  
pp. 97874-97882 ◽  
Author(s):  
Pramod Kumar ◽  
Vijay Kumar ◽  
Rajeev Gupta
Keyword(s):  
Metal Ions ◽  
Fluorescent Probes ◽  
Cell Imaging ◽  
Logic Gates ◽  
Selective Detection ◽  
Potential Applications

Amide based probes containing phenyl (L1), naphthyl (L2) and anthracenyl (L3) groups were screened towards metal ions. Probes L2 and L3 display sensing for Fe2+ and Fe3+ ions. The L3–Fe3+ system is shown to have potential applications in logic gates and cell imaging.

Hg2+ and Cu2+ selective detection using a dual channel receptor based on thiopyrylium scaffoldings

2009 ◽  
Vol 50 (27) ◽  
pp. 3885-3888 ◽  
Author(s):  
Tatiana Ábalos ◽  
Diego Jiménez ◽  
Ramón Martínez-Máñez ◽  
Jose Vicente Ros-Lis ◽  
Santiago Royo ◽  
...  
Keyword(s):  
Selective Detection ◽  
Dual Channel

scholarly journals Selective Nonenzymatic Amperometric Detection of Lactic Acid in Human Sweat Utilizing a Multi-Walled Carbon Nanotube (MWCNT)-Polypyrrole Core-Shell Nanowire

Biosensors ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 111 ◽  
Author(s):  
Young Min Choi ◽  
Hana Lim ◽  
Ho-Nyun Lee ◽  
Young Min Park ◽  
Jin-Seong Park ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Carbon Nanotube ◽  
Sports Medicine ◽  
Amperometric Detection ◽  
High Sensitivity ◽  
Core Shell ◽  
Selective Detection ◽  
Human Sweat ◽  
Potential Applications ◽  
Lactate Sensor

Lactic acid plays an important role as a biochemical indicator for sports medicine and clinical diagnosis. The detection of lactic acid in sweat is a promising technique without any intrusive inconvenience or risk of infection. In this study, we present a selective nonenzymatic amperometric detection method for lactic acid in human sweat utilizing a multi-wall carbon nanotube (MWCNT)-polypyrrole core-shell nanowire. Because polypyrrole is a p-type conducting polymer, onto which anions are exclusively doped, leading to charge transfer, it offers selective detection for lactate anions at a specific potential, while being inert to the neutral and cationic species contained in human sweat. A chronoamperometric study reveals good sensing performance for lactic acid with a high sensitivity of 2.9 μA mM−1 cm−2 and detection limit of 51 μM. Furthermore, the MWCNT-polypyrrole nanowire exhibits excellent selectivity for lactic acid over interfering species, such as sodium chloride, glucose, urea, and riboflavin, which coexist with lactic acid in sweat. Finally, a nonenzymatic amperometric sensor for the selective detection of lactic acid in human sweat is demonstrated on commercial flexible electrodes. The results demonstrate the potential applications of the MWCNT-polypyrrole core-shell nanowire as a nonenzymatic amperometric lactate sensor.

scholarly journals Design of Metasurface with Nanoslits on Elliptical Curves for Generation of Dual-Channel Vector Beams

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3024
Author(s):  
Xiaorong Ren ◽  
Manna Gu ◽  
Xiangyu Zeng ◽  
Rui Sun ◽  
Yuqin Zhang ◽  
...  
Keyword(s):  
Focal Point ◽  
Polarized Light ◽  
Spin Component ◽  
Destructive Interference ◽  
Constructive Interference ◽  
Dual Channel ◽  
Vector Beams ◽  
Linearly Polarized ◽  
Potential Applications ◽  
Difference Time

The manipulations of nanoscale multi-channel vector beams (VBs) by metasurfaces hold potential applications in various important fields. In this paper, the metasurface with two sets of nanoslits arranged on elliptic curves was proposed to generate the dual-channel focused vector beams (FVBs). Each set of nanoslits was composed of the in-phase and the out-of-phase groups of nanoslits to introduce the constructive interference and destructive interference of the output light field of the nanoslits, focusing the converted spin component and eliminating the incident spin component at the focal point. The two sets of nanoslits for the channels at the two focal points were interleaved on the same ellipses, and by setting their parameters independently, the FVBs in the two channels are generated under illumination of linearly polarized light, while their orders and polarization states of FVBs were controlled independently. The generation of the FVBs with the designed metasurfaces was demonstrated by the finite-difference time domain (FDTD) simulations and by the experimental verifications. The work in this paper is of great significance for the generation of miniaturized multi-channel VBs and for broadening the applications of metasurfaces.

A dual-channel and fast-response fluorescent probe for selective detection of HClO and its applications in live cells

2019 ◽  
Vol 299 ◽  
pp. 126937 ◽  
Author(s):  
Shuzhi Liu ◽  
Di Yang ◽  
Yijiang Liu ◽  
Hua Pan ◽  
Hongbiao Chen ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Fast Response ◽  
Live Cells ◽  
Selective Detection ◽  
Dual Channel
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