Multiwavelength plasmonic activity in aluminum-based 2D nanostructures for biosensing applications

Journal of Computational Electronics - Surface plasmons (SP) can be effectively tuned in the entire UV–visible–near-infrared (NIR) spectrum, bringing together a variety of optical...     

Morphology-Dependent Charge Carrier Dynamics and Ion Migration Behavior of CsPbBr3 Halide Perovskite Quantum Dot Films

Exceptional electronic, optoelectronic, and sensing properties of inorganic Cs-based perovskites are significantly influenced by the defect chemistry of the material. Although organic halide perovskites that have a polycrystalline structure are heavily studied, understanding of the defect properties at the grain boundaries (GB) of inorganic Cs-based perovskite quantum dots (QDs) is still limited. Here, morphology-dependent charge carrier dynamics of CsPbBr₃ quantum dots at the nanoscale by performing scanning probe microscopy of thermally treated samples are investigated. The grain boundaries of defect-engineered samples show higher surface potential than the grain interiors under light illumination, suggesting an effective role of GBs as charge collection and transport channels. The lower density of crystallographic defects and lower trap density at GBs specifically of heat-treated samples cause insignificant dark current, lower local current hysteresis, and higher photocurrent, than the control samples. It is also shown that the decay rate of surface photovoltage of the heated sample is quicker than the control sample, which implies a considerable impact of ion migration on the relaxation dynamic of photogenerated charge carriers. These findings reveal that the annealing process is an effective strategy to control not only the morphology but also the optoelectrical properties of GB defects, and the dynamic of ion migration. Understanding the origin of photoelectric activity in this material allows for designing and engineering optoelectronic QD devices with enhanced functionality.     

Ultrasensitive label-free electrical detection of charged biomolecules using a metal–semiconductor–metal Schottky silicon nanowire biristor

Journal of Computational Electronics - An open-base metal–semiconductor–metal Schottky silicon nanowire (MSM-SiNW) biristor device is applied for ultrasensitive, label-free, real-time...     

Effect of Temperature on Performance of 5-nm Node Silicon Nanosheet Transistors for Analog Applications

Silicon - This work investigates the effects of temperature on the performance of a 5-nm node N-channel Nanosheet Transistor (NST) for analog applications. A fully calibrated commercial TCAD...     

An effective NIDS framework based on a comprehensive survey of feature optimization and classification techniques

Neural Computing and Applications - The technological advancement leads to an increase in the usage of the Internet with many applications and connected devices. This increased network size causes...     

Layered Titanium Carbide-Mediated Fast Shape Switching and Excellent Thermal and Electrical Transport in Shape-Memory-Polymer Composites for Smart Technologies: MAX Versus MXene

Stimuli-responsive materials can frequently tune between their temporary and original shapes, and have the potential for artificial intelligence-based technologies in robotics, aerospace, biomedical, engineering, security, etc. Shape memory polymers (SMPs) are promising for these technologies but their inadequate thermal and electrical characteristics causing slow shape recovery limit their practical applications. Herein, for the first time, comprehensively and precisely the shape memory polyurethane (PU), a promising SMP, via a variety of novel layered titanium carbides fillers, namely, Ti₂AlC (MAX₁), Ti₃AlC₂ (MAX₂), and Ti₃C₂ (MXene), is engineered. The resultant PU-composites show 30–50% faster shape recovery in different environments, 20–25% greater extent of shape recovery in the load-constrained environment, 100–125% higher thermal conductivity, and 700–16 000× higher electrical current. Importantly, the reinforcement of even a small amount of MAX and MXene (such as 0.25 wt%) has largely boosted the performance of PU. Considering ease of processability and performance enhancement factors, the MAX-phase fillers may be preferred over MXene-phase fillers for next-generation composites development. Employing PU composite component as both heat-sensor and actuator, a unique heat detector/fire alarm device that works successfully in simulated heat and fire environments is demonstrated. This work is crucial for enabling futuristic technologies.     

Recent Advances in Small Molecule-Based Intracellular pH Probes

Intracellular pH plays an important role in many biological and pathological processes. Small-molecule based pH probes are found to be the most effective for pH sensing because of ease of preparation, high sensitivity, and quick response. They have many advantages such as small perturbation to the functions of the target, functional adaptability, cellular component-specific localization, etc. The present review highlights the flurry of recent activity in the development of such probes. The probes are categorized based on the type of fluorophore used like quinoline, coumarin, BODIPY, rhodamine, indolium, naphthalimide, etc., and their analytical performance is discussed.     

Phish-Sight: a new approach for phishing detection using dominant colors on web pages and machine learning

International Journal of Information Security - Phishing is one of the most dangerous threats in which a hacker imitates a person, company or government agency to lure and deceive their victims....