Wearable biosensors promise real-time measurements of chemicals in human sweat, with the potential for dramatic improvements medical diagnostics and athletic performance through continuous metabolite electrolyte monitoring. However, sweat sensing is still its infancy, questions remain about whether can be used purposes. sensors are focused on proof-of-concept designs that not scalable multisubject trials, which could elucidate utility health Moreover, many wearable do include microfluidics...

The integration of microfluidics and electrochemical cells is at the forefront emerging sensors energy systems; however, a fabrication scheme that can create both in scalable fashion still lacking. We present one-step, mask-free process to create, pattern, tune laser-induced graphene (LIG) with ubiquitous CO2 laser. laser parameters are adjusted LIG different electrical conductivity, surface morphology, wettability without need for postchemical modification. Such definitive control over...

Neonicotinoids are the fastest-growing insecticide accounting for over 25% of global pesticide market and capable controlling a range pests that damage croplands, home yards/gardens, golf course greens. However, widespread use has led to nontarget organism decline in pollinators, insects, birds, while chronic, sublethal effects on humans still largely unknown. Therefore, there is need understand how prevalent neonicotinoids environment as currently no commercially available field-deployable...

Aerosol jet printing is a noncontact, digital, additive manufacturing technique compatible with wide variety of functional materials. Although promising, development new materials and devices using this remains hindered by limited rational ink formulation, most recent studies focused on device demonstration rather than foundational process science. In the present work, systematic approach to formulating polymer-stabilized graphene reported, which considers effect solvent composition...

Abstract Extensive research into green technologies is driven by the worldwide push for eco‐friendly materials and energy solutions. The focus on synergies that prioritize sustainability environmental benefits. This study explores potential of abundant, non‐toxic, sustainable resources such as paper, lignin‐enriched cork producing laser‐induced graphene (LIG) supercapacitor electrodes with improved capacitance. A single‐step methodology using a CO 2 laser system developed fabricating these...

Abstract Glyphosate is a globally applied herbicide yet it has been relatively undetectable in‐field samples outside of gold‐standard techniques. Its presumed nontoxicity toward humans contested by the International Agency for Research on Cancer, while detected in farmers’ urine, surface waters and crop residues. Rapid, on‐site detection glyphosate hindered lack field‐deployable easy‐to‐use sensors that circumvent sample transportation to limited laboratories possess equipment needed...

Flexible nanoporous gold and silver leaf are patterned without photolithography adhered to microfluidics create disposable multiplexed electrochemical biosensors.

The goal of this study is to explore and analyze the concurrent shear-driven droplet shedding coalescence under effect various parameters, such as size distance, well airflow velocity surface wettability. To investigate capture different aspects dynamics, both experimental modeling numerical are conducted. volume fluid coupled with large-eddy simulation turbulent model in conjunction dynamic contact angle implemented on wettabilities. Analysis revealed a great match between outcomes. It...

The widespread use of the pesticide glyphosate has raised concerns regarding its potential health and environmental impacts. Consequently, there is an increasing demand for monitoring levels in surface waters food products. Currently, no commercially available rapid, field-deployable sensor capable quantifying concentrations samples. This study presents development a biosensor based on laser-induced graphene (LIG) that functionalized with transition metal dichalcogenides (TMDs) enzyme...

Monitoring of pesticide concentration distribution across farm fields is crucial to ensure precise and efficient application while preventing overuse or untreated areas.

Abstract The convergence of microfluidic and electrochemical biosensor technologies offers significant potential for rapid, in‐field diagnostics in biomedical environmental applications. Traditional systems face challenges cost, scalability, operational complexity, especially remote settings. Addressing these issues, laser‐induced graphene integrated sensors (LIGMIS) are presented as an innovative platform that integrates microfluidics both comprised graphene. This study advances the LIGMIS...

Droplet impact on a spinning surface has been observed in different industries and plays an important role the performance of industrial systems. In current study, dynamics water droplet hydrophilic disk is investigated. An experimental setup designed way that diameter, velocity, rotational speed, location are precisely controlled. While diameter fixed present other mentioned parameters changed their effects behavior discussed. High-speed imaging used to record under various operating...

An experimental study is performed to investigate the effect of tangential velocity on dynamics a water droplet impacting spinning superhydrophobic surface. It revealed that an increase in results spreading from symmetrical asymmetrical shape Moreover, depending impact and velocities, three behaviors are observed: bouncing, splashing, splashing. In bouncing regime, it found contact time independent decreases as increases. However, maximum diameter this regime function both velocities....

Open microfluidics have emerged as a low-cost, pumpless alternative strategy to conventional for delivery of fluid wide variety applications including rapid biochemical analysis and medical diagnosis. However, creating open by tuning the wettability surfaces typically requires sophisticated cleanroom processes that are unamenable scalable manufacturing. Herein, we present simple approach develop microfluidic platforms manipulating surface spin-coated graphene ink films on flexible...

Abstract The copolymer of bisphenol A‐based benzoxazine and cycloaliphatic epoxy resin possesses greater processability glass‐transition temperature compared to that homopolymer, making it suitable for high‐temperature aerospace applications. aim this work is investigate the behavior copolymers under thermos‐oxidative aging conditions using surface characterization techniques. homopolymer samples were thermally aged in an air‐circulating oven controlled temperatures 180 200°C various periods...

Flexible carbon nanomaterial sensors offer a low-cost, facile fabrication approach toward producing at an industrial scale for electrochemical sensing. Graphene and nanotube (CNT) based have been studied, with various methods available, including high-quality thin film graphene CNTs via chemical vapor deposition (CVD). However, CVD is high-temperature vacuum process that low-yielding consequently costly, hindering its implementation into single-use test strip sensors. Other methods, such as...

Carbon-nanomaterial sensors offer promising routes toward low-cost, high-throughput electrochemical sensors. Carbon nanomaterials, such as graphene and carbon nanotube (CNT), have been studied with various fabrication methods to produce sensors, including high-quality thin film CNT by chemical vapor deposition. However, the complexity cost associated their hindered implementation into single-use test strip Even high-yield mechanical and/or exfoliation of from graphite followed solution phase...

In the critical fields of precision agriculture and food safety, demand for accurate sensitive monitoring tools fertilizers, pesticides, food-borne pathogens cannot be overstated. Our collaborative research with commercial entities seeks to overcome challenges faced by current electrochemical ion-selective, enzymatic, immunosensors, which often fall short in selectivity, stability, sensitivity, particularly under field conditions. We showcase tunable properties Laser-Induced Graphene (LIG) –...

This presentation will demonstrate how low-cost printed and flexible graphene circuits can overcome the challenges associated with conventional electrical to open door a highly sensitive monitoring of biochemical threats toxins including nerve agents/pesticides. The use inkjet aerosol printing; spin coating; laser writing (i.e., induced graphene) be used create such high resolution (line widths as low 20 µm). Moreover, rapid-pulse annealing and/or salt porogens added into inks before...

View Video Presentation: https://doi.org/10.2514/6.2023-4277.vid Graphene, consisting of a single layer carbon atoms, possesses properties that make it an ideal candidate for engineering anti-/de-icing systems. Its hydrophobicity and excellent electrical thermal conductivity desirable material this purpose. The study investigated Spin Coated Graphene which displayed (contact angle > 90) conductivity. focused on using sample to cover 15% the naca12 airfoil model's leading edge while coating...

View Video Presentation: https://doi.org/10.2514/6.2022-4115.vid An experimental study was conducted to investigate the feasibility of using a graphene-based material for aircraft icing mitigation. The graphene sample used in this laser-treated with grid size 1mm and 0.5mm. wettability characteristics samples were investigated, 0.5mm having hydrophobic static contact angle greater than 90 degrees, while had hydrophilic but advancing angle. thermal investigated four different input power...