Biological ion channels are able to generate coherent and oscillatory signals from intrinsically noisy stochastic components for ultrasensitive discrimination with the use of resonance, a concept not yet demonstrated in human-made analogs. We show that single-walled carbon nanotube demonstrates oscillations electroosmotic current through its interior at specific ranges electric field signatures coherence resonance. Stochastic pore blocking is observed when individual cations partition into...

There is significant interest in combining carbon nanotubes with semiconducting polymers for photovoltaic applications because of potential advantages from smaller exciton transport lengths and enhanced charge separation. However, to date, bulk heterojunction (BHJ) devices have demonstrated relatively poor efficiencies, little understood about the polymer/nanotube junction. To investigate this interface, we fabricate a planar nano-heterojunction comprising well-isolated millimeter-long...

The intrinsic properties of initially p-type doped graphene (grown by chemical vapor deposition (CVD)) can be recovered buffered oxide etch (BOE) treatment, and the dominant factor governing doping is identified as H2O/O2 redox system. Semi-ionic C–F bonding prevents reaction between products system graphene. BOE-treated field effect transistors (FETs) subsequently exposed to air, became due recovery In comparison, poly(methyl methacrylate) (PMMA)-coated FETs had improved stability for...

Reactive oxygen species, specifically hydrogen peroxide (H(2)O(2)), activate signal transduction pathways during angiogenesis and therefore play an important role in physiological development as well various pathophysiologies. Herein, we utilize a near-infrared fluorescent single-walled carbon nanotube (SWNT) sensor array to measure the single-molecule efflux of H(2)O(2) from human umbilical vein endothelial cells (HUVEC) response angiogenic stimulation. Two agents were investigated:...

In addressing the increasing demand for wearable sensing systems, performance and lifespan of such devices must be improved by enhancing their sensitivity healing capabilities. The present work introduces an innovative method synthesizing a healable disulfide bond contained in polydimethylsiloxane network (PDMS-SS) that incorporates ionic salts, which is designed to serve as highly effective dielectric layer capacitive tactile sensors. Within polymer structure, cross-linking agent...

Single-walled carbon nanotubes (SWNTs) exhibit distinct electronic properties, categorized as metallic or semiconducting, determined by their chirality. The precise and selective separation of these types is pivotal for advancing nanotechnology applications. While conventional gel chromatography has been widely employed large-scale separations, its limitations in addressing microscale dynamics electronic-type differentiation have persisted. Here, we present a polydimethylsiloxane...

Abstract Solar hydrogen production using photoelectrochemical (PEC) cells requires the selection of cost‐effective materials with high photoactivity and durability. CuBi 2 O 4 photocathodes possess an appropriate bandgap for efficient production. However, their performance is limited by poor charge transport interface voids formed due to porous structure during annealing, which complicates deposition passivation overlayers. To address this, effective suppression in essential. Here, study...

Glucose sensor: Glucose-binding protein (GBP) covalently conjugated to a fluorescent single-walled carbon nanotube (SWNT) is shown act as an optical switch. Hinge-bending response glucose causes reversible exciton quenching of the SWNT fluorescence with high selectivity (see scheme).

Vertically well-aligned multiwall carbon nanotubes (MWNTs) were grown on nickel-coated glass substrates by plasma-enhanced chemical vapor deposition at low temperatures, below 600 °C, with and without hot filament. Acetylene ammonia gas used as the source a catalyst. Effects of growth parameters, such plasma intensity, filament current, substrate temperature, characteristics MWNTs investigated. Plasma intensity was found to be most critical parameter controlling MWNTs. Field emission from...

Understanding the mechanisms by which vertical arrays of carbon nanotube (CNT) forests terminate their growth may lead to production aligned materials infinite length. We confirm through calculation Thiele modulus that several prominent systems reported in literature date are not stunted diffusion limitations. Evidence also suggests that, for many systems, growth-termination mechanism is spatially correlated among nanotubes, making spontaneous, random catalytic poisoning unlikely as a...

The nonlinear coupling between exothermic chemical reactions and a nanowire or nanotube with large axial heat conduction results in self-propagating thermal wave guided along the nanoconduit. resulting reaction induces concomitant thermopower of high power density (>7 kW/kg), an electrical current same direction. We develop theory such waves analyze them experimentally, showing that for certain values kinetics parameters, oscillating wavefront velocities are possible. demonstrate...

Morphology of Ni tips and microstructures carbon tubules were investigated a growth model for was proposed. Triangular shaped piled-cone structure observed at the temperature 500 °C. At high 620 °C, smoothened edge found graphite layers became parallel to direction as they close outer wall tubules. Formation nuclei tubule explained by NH3 pre-etching precipitation atoms diffused from surface layer. A preferential with orientation size effect. modified tip based on diffusion proposed mechanism

We controlled the density of carbon nanotubes (CNTs) through in situ NH3 plasma pretreatment and investigated field emission properties with variation. Ni catalytic layer was transformed into small nanoparticles time power. As increased, growth rate grown CNTs gradually decreased. Also, reduced from 2×109 to 8×106/cm2 an increase 10 30 min for Å. With a decrease CNTs, current increased turn on electric obtained large uniform (about 9 mA/emission area 0.49 cm2) film 8×106/cm2.

Abstract We report on how to quantify the binding affinity between a nanoparticle and chemical functional group using various experimental methods such as cantilever assay, PeakForce quantitative nanomechanical property mapping, lateral force microscopy. For immobilization of Au nanoparticles (AuNPs) onto microscale silicon substrate, we have considered two different molecules amine catecholamine (here, dopamine was used). It is found that catecholamine-modified surface more effective for...

Single-walled carbon nanotubes (SWCNTs) were fabricated using AC dielectrophoresis into chemocapacitive sensors, and molecular receptors applied for the selective detection of several chemical warfare agents (CWAs). The responses toward nerve simulants (G V), choking blister as well a pesticide investigated with specific receptor molecules that either covalently functionalized or noncovalently coated onto surfaces SWCNTs. SWCNT-based sensors showed reproducibility sensitivity to 200 ppb...

We have investigated carbon nanotube (CNT)-field emitter array (FEA) for the application of lighting system like back light unit (BLU) in liquid crystal display (LCD). The photosensitive CNT paste was synthesized by mixing multiwalled nanotubes (MWNTs), spin on glass (SOG), organic vehicle, monomers, oligomers and photo initiators. Uniform films were obtained using backside exposure technique emission properties evaluated depending variation SOG content firing conditions. Then we prepared...

Recent advances in nanotechnology have produced the first sensor transducers capable of resolving adsorption and desorption single molecules. Examples include near infrared fluorescent single-walled carbon nanotubes that report single-molecule binding via stochastic quenching. A central question for theory such sensors is how to analyze events extract local concentration or flux analyte sensor. In this work, we compare algorithms varying complexity accomplishing by constructing a kinetic...

Thermopower waves are a recently developed energy conversion concept utilizing dynamic temperature and chemical potential gradients to harvest electrical while the combustion wave propagates along hybrid layers of nanomaterials fuels. The intrinsic properties core fuels in composites can broadly affect generation, as well process, thermopower waves. So far, most research has focused on application new enhance generation. In this study, we demonstrate that alignment significantly influence...

Using a thermal evaporator, various porous Cu films were deposited according to the deposition pressure. CuO formed by post heat treatment in air. Changes morphological and structural characteristics of analyzed using field-emission scanning electron microscopy (FE-SEM) X-ray diffraction (XRD). Relative density porosity quantitatively calculated. with pores ranging from 39.4 95.2% successfully manufactured applied as gas sensors for H2S detection on interdigitated electrode (IDE) substrate....