Showing papers in "Biosensors and Bioelectronics in 2014"

TL;DR: This review presents the working principles and reaction mechanism of paper-based diagnostics, including dipstick assays, lateral flow assays (LFAs), and microfluidic paper- based analytical devices (μPADs), as well as the selection of substrates and fabrication methods.

TL;DR: The selectivity experiments reveal that the fluorescent sensor is specific for Hg(2+) even with interference by high concentrations of other metal ions, and can be successfully applied to the determination of Hg (2+) in tap water and real lake water samples.

TL;DR: A simple and low-cost synthetic strategy to prepare nitrogen-doped GQDs (N-GQDs) through hydrothermal treatment of GQD with hydrazine is developed, which exhibits enhanced fluorescence with blue-shifted energy and can be used as a green and facile sensing platform for label-free sensitive and selective detection of Fe (III) ions in aqueous solution and real water samples.

TL;DR: The favorable analytical performance along with the wearable nature of the wireless transceiver makes the new epidermal potentiometric sensing system attractive for continuous monitoring the sodium dynamics in human perspiration during diverse activities relevant to the healthcare, fitness, military, healthcare and skin-care domains.

TL;DR: An innovative and green strategy to synthesize carbon dots (CDs) with a quantum yield (QY) of nearly 19.8% has been successfully established for the first time and the CDs obtained here exhibited various advantages including high fluorescent QY, excellent photostability, non-toxicity and satisfactory stability.

TL;DR: A novel nanocomposite of graphene, polyvinylpyrrolidone (PVP) and polyaniline (PANI) has been successfully prepared and used for the modification of paper-based biosensors via electrospraying and can be applied for the determination of cholesterol in a complex biological fluid.

TL;DR: The modified biosensor was applied to the determination of AA, DA, UA and NO2(-) in urine samples by using standard adding method with satisfactory results.

TL;DR: The proposed dual-mode nanosensor demonstrated highly selectivity toward GSH, and allows the detection of GSH as low as 50 nM, demonstrating its potential in bioanalysis and biodection, which might be significant in disease diagnosis in the future.

TL;DR: Progress in the development of monitoring methods for LAMP is reviewed to achieve efficient genetic analysis of samples.

TL;DR: An "off-on" approach for highly sensitive and selective detection of Cu(2+) and L-Cys using carbon dots (CDs) as fluorescent probes using mesoporous silica spheres as nanoreactors is demonstrated, which is promising for biological applications.

TL;DR: A novel modified N-(4-hydroxyphenyl)-3,5-dinitrobenzamide-FePt/CNTs carbon paste electrode was used for the electrocatalytic determination of glutathione (GSH) in the presence of piroxicam (PXM) for the first time.

TL;DR: Nanostructured substrates with high average SERS enhancement factors (EFs) can now be easily produced, with the EF depending strongly on the size and shape of the nanostructures that give rise to the effect.

TL;DR: The present review collects the most relevant developments of the past twenty years categorizing them into two main groups, such as common- and double path waveguide interferometers and the diverse sensor designs in order to contrast the advantages and disadvantages of the different approaches and sensor families.

TL;DR: This review is an attempt to describe the various cortisol sensing platforms and their potential to be integrated into a wearable system for online and continuous monitoring of cortisol rhythm at POC as a function of one's environment.

TL;DR: This review focuses on recent achievements in the design of various optical aptasensors for small biomolecules, containing fluorescence aptAsensors, colorimetric aptas Sensors, chemiluminescence aptasenors and other optical apt asensors.

TL;DR: A novel and sensitive carbon fiber electrode modified by graphene flowers was prepared and used to simultaneously determine ascorbic acid, dopamine and uric acid and showed satisfactory results when applied to the determination of AA, DA and UA in urine and serum samples.

TL;DR: The redox transition between Ni(OH)2 and NiOOH is also contributed to the electrocatalytic oxidation of Ni and its oxides toward small molecules in alkaline media.

TL;DR: A novel fluorescent sensor based on graphene quantum dots (GQDs) was synthesized for determination of paranitrophenol (4-NP) in water sample, where molecularly imprinted polymer (MIP) was incorporated in GQDs-based sensing system for the first time.

TL;DR: The formation of purple-colored aggregates from the red dispersed (repulsion) state of GNPs in the presence of mono- or divalent ions is the key principle behind this assay, and can be an alternative to existing diagnostic assays.

TL;DR: Copper nanoparticles decorated nitrogen-doped graphene (Cu-N-G) showed enhanced electrocatalytic activity to glucose oxidation due to the integration of N-G, which exhibited the oxidation peak current of glucose ca.

TL;DR: It was demonstrated that the NiO-HMS-based glucose biosensor offers a variety of merits, such as a wide linear response window for glucose concentrations of 1.67 μM-6.87 mM, short response time (3 s), a lower detection limit of 0.53 μM (S/N=3), high sensitivity as well as good stability and repeatability.

TL;DR: With satisfactory selectivity, reproducibility, and stability, the nanostructure proposed offered an alternative for electrode fabricating and glucose biosensing.

TL;DR: Various types of paper power devices are discussed including electrochemical batteries, biofuel cells, lithium-ion batteries, supercapacitors, and nanogenerators.

TL;DR: This new paper-based electrochemical glucose sensor shows promise in applying point-of-care (POC) device in whole blood tests, and particularly being appropriate for use in the developing world and in resource-limited settings.

TL;DR: Synthesis of zinc oxide nanoparticles incorporated graphene-carbon nanotubes hybrid (GR-CNT-ZnO) through a simple, one-pot method is demonstrated, showing appreciable repeatability, reproducibility and remarkable stability for the sensitive determination of glucose.

TL;DR: The findings not only provide the fundamental studies on carbon supported low-dimensional transition-metal oxides but also open up the new possibilities of their applications in green energy devices.

TL;DR: A small-scale single chamber air-cathode microbial fuel cell fabricated by rapid prototyping layer-by-layer 3D printing was tested as a biosensor for continuous water quality monitoring, which could rapidly detect the presence of cadmium in water with high sensitivity and lower detection limit.

TL;DR: A colorimetric method and a portable test kit for the visual detection of blood glucose have been developed by using glucose oxidase (GOx) and WS2 nanosheets-catalyzed reactions.

TL;DR: A facile chemosensor was developed for rapid, reliable, sensitive, and selective sensing of Fe(3+) ions with detection limit as low as 10 nM and a dynamic range from10 nM to 10 μM and was successfully used for the determination of iron contents in serum samples.

TL;DR: A novel composite film of Au@carbon dots modified glassy carbon electrode (Au@CDs-CS/GCE) was prepared in a simple manner and applied in the sensitive and reliable determination of dopamine (DA) with satisfactory results.