scholarly journals Synthesis and Characterization of the Perthiatriarylmethyl Radical and Its Dendritic Derivatives with High Sensitivity and Selectivity to Superoxide Radical

2018 ◽  
Vol 24 (27) ◽  
pp. 6865-6865 ◽  
Author(s):  
Xiaoli Tan ◽  
Shanqing Tao ◽  
Wenbo Liu ◽  
Antal Rockenbauer ◽  
Frederick A. Villamena ◽  
...  
Keyword(s):  
Superoxide Radical ◽  
High Sensitivity ◽  
Synthesis And Characterization ◽  
Sensitivity And Selectivity

Synthesis and Characterization of the Perthiatriarylmethyl Radical and Its Dendritic Derivatives with High Sensitivity and Selectivity to Superoxide Radical

2018 ◽  
Vol 24 (27) ◽  
pp. 6958-6967 ◽  
Author(s):  
Xiaoli Tan ◽  
Shanqing Tao ◽  
Wenbo Liu ◽  
Antal Rockenbauer ◽  
Frederick A. Villamena ◽  
...  
Keyword(s):  
Superoxide Radical ◽  
High Sensitivity ◽  
Synthesis And Characterization ◽  
Sensitivity And Selectivity

Synthesis and characterization of combinatorial libraries of semiconductor gas sensors.

2003 ◽  
Vol 804 ◽  
Author(s):  
M. A. Aronova ◽  
K. S. Chang ◽  
I. Takeuchi ◽  
H. Jabs ◽  
D. Westerheim ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Pulsed Laser ◽  
Combinatorial Libraries ◽  
High Sensitivity ◽  
Pulsed Laser Ablation ◽  
Electronic Noses ◽  
Sensitivity And Selectivity ◽  
Semiconductor Gas Sensors ◽  
Array Geometry

ABSTRACTWe have fabricated thin-film combinatorial gas sensor libraries based on doped semiconducting SnO2 thin films. The utility of combinatorial libraries is two-fold: one is to search and optimize the compositions for high sensitivity and selectivity of gases, and the other is to make use of the natural array geometry of the libraries with different sensor elements for electronic noses. Combinatorial pulsed-laser ablation was used to deposit compositionally varying arrays of sensor elements onto a pre-patterned device electrode configuration. Using a multiplexing electronics, we have demonstrated detection of chloroform, formaldehyde, and benzene gases at concentrations down to 12.5 ppm through pattern recognition of signals from the arrays of sensors.

scholarly journals New horizons for the synthesis of nanoparticles: Germanium nanoparticles from metastable GeBr-solutions

2021 ◽  
Vol 44 (1) ◽  
pp. 243-249
Author(s):  
Viktoriia Slynchuk ◽  
Martin Hodas ◽  
Dominik Naglav-Hansen ◽  
Frank Schreiber ◽  
Andreas Schnepf
Keyword(s):  
Surface Functionalization ◽  
Maximum Yield ◽  
High Sensitivity ◽  
Synthesis And Characterization ◽  
Narrow Size Distribution ◽  
Reaction Route ◽  
Synthesis Of Nanoparticles ◽  
New Horizons ◽  
Germanium Nanoparticles

Abstract We present the synthesis and characterization of halide-terminated colloidal Ge nanoparticles of 2–10 nm with a narrow size distribution, synthesized via a novel reaction route. The nanoparticles are prepared by the disproportionation reaction of metastable Ge(I)X solutions and are obtained in a maximum yield of 79%. Control of the nanoparticle size is achieved by varying the aging time and/or temperature. The halide termination of the nanoparticles is a perfect prerequisite for further surface functionalization but also leads to a high sensitivity of the germanium nanoparticles to water and air.

CdSe Quantum Dots Decorated by 3-Aminobenzeneboronic Acid as Fluorescence Probe for Glucose

2011 ◽  
Vol 306-307 ◽  
pp. 1338-1341
Author(s):  
Shao Wei Wang ◽  
Xia Ona Zhang ◽  
Jing Hua Yu
Keyword(s):  
Quantum Dots ◽  
Fluorescence Probe ◽  
High Sensitivity ◽  
Cdse Quantum Dots ◽  
Optimal Conditions ◽  
Cdse Qds ◽  
Relative Standard ◽  
Sensitivity And Selectivity

A simple route to the production of high-quality CdSe quantum dots (QDs) is presented. The characterization of CdSe QDs was measured by Zetasizer Nano ZS, ultraviolet-visible spectoscopy and fluorospectrophotometer. The CdSe QDs were decorated by 3-Aminobenzeneboronic acid to obtain good fluorescent characteristic. Under the optimal conditions, the decreased normalized absorbance was linear to the concentration of glucose from 1.0×10−7 to 2.9×10−6 mol·L-1with a detection limit of 5.0´10-8mol·L-1. The relative standard deviation (RSD) for the determination of 1.0×10-7mol·L-1was 1.4 % by 11 replicate determination. In this paper, the fluorescent behavior of glucose with the decorated CdSe QDs was studied, and it is found that the system has a high sensitivity and selectivity for analysis of glucose.

scholarly journals Amperometric Biosensors for L-Arginine Determination Based on L-Arginine Oxidase and Peroxidase-Like Nanozymes

2021 ◽  
Vol 11 (15) ◽  
pp. 7024
Author(s):  
Nataliya Stasyuk ◽  
Galina Gayda ◽  
Olha Demkiv ◽  
Lyubomyr Darmohray ◽  
Mykhailo Gonchar ◽  
...  
Keyword(s):  
Pharmaceutical Preparation ◽  
Enzymatic Reaction ◽  
High Sensitivity ◽  
The Novel ◽  
Limited Data ◽  
Amperometric Biosensors ◽  
Graphite Electrodes ◽  
Sensitivity And Selectivity ◽  
The Cost

There are limited data on amperometric biosensors (ABSs) for L-arginine (Arg) determination based on oxidases that produce hydrogen peroxide (H2O2) as a byproduct of enzymatic reaction, and artificial peroxidases (POs) for decomposition of H2O2. The most frequently proposed Arg-sensitive oxidase-based ABSs contain at least two enzymes in the bioselective layer; this complicates the procedure and increases the cost of analysis. Therefore, the construction of a one-enzyme ABS for Arg analysis is a practical problem. In the current work, fabrication, and characterization of three ABS types for the direct measurement of Arg were proposed. L-arginine oxidase (ArgO) isolated from the mushroom Amanita phalloides was co-immobilized with PO-like nanozymes (NZs) on the surface of graphite electrodes. As PO mimetics, chemically synthesized NZs of CeCu (nCeCU) and NiPtPd (nNiPtPd), as well as green-synthesized hexacyanoferrate of copper (gCuHCF), were used. The novel ABSs exhibited high sensitivity and selectivity to Arg, broad linear ranges and good storage stabilities. Two ABSs were tested on real samples of products containing Arg, including the pharmaceutical preparation “Tivortine”, juices, and wine. A high correlation (R = 0.995) was demonstrated between the results of testing “Tivortine” and juice using nCeCU/GE and nNiPtPd/GE. It is worth mentioning that only a slight difference (less than 1%) was observed for “Tivortin” between the experimentally determined content of Arg and its value declared by the producer. The proposed ArgO-NZ-based ABSs may be promising for Arg analysis in different branches of science, medicine, and industry.

Ultrastructural identification of three types of sensory setae on copepod antennae

1995 ◽  
Vol 53 ◽  
pp. 956-957
Author(s):  
T. M. Weatherby ◽  
P.H. Lenz
Keyword(s):  
Phase Locking ◽  
Membrane Surface ◽  
Reaction Times ◽  
High Sensitivity ◽  
Structural Features ◽  
Calanoid Copepods ◽  
Marine Food Webs ◽  
Dendritic Membrane ◽  
Ultrastructural Characterization

Crustaceans, as well as other arthropods, are covered with sensory setae and hairs, including mechanoand chemosensory sensillae with a ciliary origin. Calanoid copepods are small planktonic crustaceans forming a major link in marine food webs. In conjunction with behavioral and physiological studies of the antennae of calanoids, we undertook the ultrastructural characterization of sensory setae on the antennae of Pleuromamma xiphias.Distal mechanoreceptive setae exhibit exceptional behavioral and physiological performance characteristics: high sensitivity (<10 nm displacements), fast reaction times (<1 msec latency) and phase locking to high frequencies (1-2 kHz). Unusual structural features of the mechanoreceptors are likely to be related to their physiological sensitivity. These features include a large number (up to 3000) of microtubules in each sensory cell dendrite, arising from or anchored to electron dense rods associated with the ciliary basal body microtubule doublets. The microtubules are arranged in a regular array, with bridges between and within rows. These bundles of microtubules extend far into each mechanoreceptive seta and terminate in a staggered fashion along the dendritic membrane, contacting a large membrane surface area and providing a large potential site of mechanotransduction.

Schottky diodes based on 2D materials for environmental gas monitoring: a review on emerging trends, recent developments and future perspectives

2021 ◽  
Author(s):  
Minu Mathew ◽  
Chandra Sekhar Rout
Keyword(s):  
Gas Sensing ◽  
2D Materials ◽  
Schottky Diodes ◽  
High Sensitivity ◽  
Future Perspectives ◽  
Working Temperature ◽  
Emerging Trends ◽  
Gas Sensing Properties ◽  
Recent Developments ◽  
Sensitivity And Selectivity

This review details the fundamentals, working principles and recent developments of Schottky junctions based on 2D materials to emphasize their improved gas sensing properties including low working temperature, high sensitivity, and selectivity.

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