Stabiliser-free zinc oxide quantum dots have been utilised as a greener sensing platform for the quantification of arsenic at parts-per-billion level. The method is free from common interference and applicable real sample analysis.

Radiative cooling has attracted tremendous interest as it can tackle global warming by saving energy consumption in heating, ventilation, and air conditioning (HVAC) buildings. Polymer materials play an important role radiative owing to their high infrared emissivity. Along this line, numerous studies on optically optimized geometries were carried out enhance the selective wavelength absorption for emissivity; however, polymer material itself relatively was not investigated enough. Herein,...

Radiative cooling is a zero energy consumption surface technology, which appears to be viable option for the development of radiative face masks. After COVID-19 pandemic, masks have become crucial protective equipment in our daily lives, protecting from inhalation fine particulate matter (PM) and also viruses. However, wearing conventional long time very unpleasant due swelter on face, especially outdoor sunlight environment. In this study, polymer-based composite material (PCM) mask has...

The intriguing light-matter interactions can be governed by controlling the particle size and shape, electromagnetic dielectric properties local environment of metal nanostructures. Amongst different approaches that have been engendered to manipulate light at nanoscale, self-assembly metallic nanostructures with controllable interparticle distances angular orientations, which strongly impact their optical attributes, is one viable avenues exploit utility in a diverse range niche...

The correspondence between plasmonics and electronics has been determined through the mechanics of gold nanorod dimers from both theoretical experimental perspectives.

Plasmonic sensitivity of noble metals has often been attributed to the morphology nanostructures and dielectric effects both materials surrounding medium. The measurable plasmonic shift with respect change in local as a function analyte concentrations within nanoscale volume forms basis sensing. However, situation medium presence multicomponent systems and, moreover, inhomogeneous adsorption around anisotropic become seemingly complicated precise description several individual components...

Para-aminobenzoic acid (PABA) stabilised zinc oxide (ZnO) quantum dots (QDs) have been synthesised by refluxing acetate dihydrate in methanol under alkaline condition and re-dispersed into water centrifugation. Aqueous dispersion of PABA-stabilised ZnO QDs was taken with seven different organic solvents test tubes subjected to diazo reaction specified conditions. It seen that the assembled diverse superstructures depending on nature immiscible solvent at aqueous–organic interface. The...

Here, we report hitherto unobserved local field (LF)-assisted pump wavelength-dependent nonlinear optical (NLO) effects of three-photon (3PA)-induced four-photon absorption (4PA) at 532 nm and two-photon-induced 3PA 730 in triangular-shaped core–shell Ag-Au nanoparticles (TrAg@Au) by femtosecond Z-scan. The shell thickness-dependent enhancement the LF is observed a COMSOL simulation. intensity-dependent interplay between saturable reverse-saturable absorptions along with switching (NL) phase...

The systematic combination of N-heterocyclic olefins (NHOs) with fluoroarenes resulted in twisted push–pull alkenes. These alkenes carry electron-donating cyclicdiamino substituents and two electron-withdrawing fluoroaryl the geminal positions. synthetic method can be extended to a variety substituted by varying NHO as well fluoroarenes. Solid-state molecular structures these molecules reveal notable elongation central C–C bond geometry alkene motif. Absorption properties were investigated...

Evaluation of antioxidant, antibacterial, antifungal and cytotoxic effects Clausena suffruticosa ethanolic root extractMd. Atiar Rahman, Joti Sankhar Chakma, Saiful Islam, Nazim Uddin Ahmed

This report dominantly focused on employment of natural micro-pillars, embedded the surface bambusa tulda leaves, as scattering centres for achieving a single mode random laser (RL) at ∼582 nm with lower line width (∼1.8 nm) and lasing threshold (132 W/cm 2 ) in Rhodamine-B dye gain medium. The stability performances is checked over months duration activities micro-pillars are confirmed via numerical simulation using COMSOL power Fourier transform (PFT) analyses. demonstration speckle-free...

Natural species have developed complex nanostructures in a hierarchical pattern to control the absorption, reflection, or transmission of desired solar and infrared wavelengths. This bio-inspired structure is promising method manipulating energy thermal management. In particular, human hair used this article highlight optothermal properties structures. study investigated how melanin, an effective absorber, structural morphology aligned domains keratin polymer chains, leading significant...

Radiative cooling technologies have had a significant impact on advancing carbon neutrality efforts by significantly improving the passive efficiency. The tandem of conduction and radiation enables solar-adaptive radiative through insulating effect materials along with solar absorption, which affects thermal state enhances transfer from surface under irradiation. This enhancement is achieved utilizing porous polymeric structure materials, facilitates improved pathways reflectance, while...

Investigation of the intrinsic relationship between crystallography and electronic properties may provide an avenue to unravel photophysical aspects semiconductor nanostructures. Since 1980s, semiconducting materials at nanoscale dimensions have been immense scientific interest because unique quantum characteristics beyond a particular size limit. Prudent advances in synthetic strategies naked ZnO dots offered opportunity imbue structure–property nanostructured systems. Seven size-specific...

The spectral characteristics of silver/zinc oxide heteromicrostructures with different interesting morphologies upon metal–semiconductor interfacial modification have been elucidated.

The influence of the surrounding solvent medium to a solute molecule in solution can be treated within framework Onsager reaction field model which is based on assumption that reduced point dipole at center spherical cavity inside described as homogeneous, polarizable specific dielectric constant. When molecules are excited polar solvent, changes photophysical properties manifested through shifts maxima absorption and fluorescence spectra observation interpreted terms Ooshika–Mataga–Lippert...

Water/<italic>o</italic>-xylene interface offers a viable platform for the synthesis of raspberry-like ZnO microstructures that act as environmentally benign catalysts Fries rearrangement.

We report EB in single-phase CoO nanoparticles, where two magnetic phases naturally emerge as the crystallite size decreases from 34.6 to 10.8 nm. The N\'eel temperature (TN) associated with antiferromagnetic ordering monotonically reduction size, highlighting significant influence of effects. nm nanoparticles exhibit magnetization irreversibility between zero field cooled (ZFC) and field-cooled (FC) states below TN. This appears well above TN further resulting absence true paramagnetic...

Abstract Recently, nano‐optics have attracted immense interest among researchers for the design of all‐optical devices to fulfill ongoing demands sustainable energy. Plasmonics nanoscale materials can be employed manipulate, guide, and convert ambient electromagnetic radiation elevate present state‐of‐the‐art in energy technology. To meet clean challenges that lie ahead, it is indispensable imbue preconceived notions configurations emerging from a set physical observables define plasmonic...

Abstract Radiative cooling technologies have had a significant impact on advancing carbon neutrality efforts by significantly improving passive efficiency. The tandem of conduction and radiation enables the solar-adaptive radiative through insulating effect materials along with solar absorption, which affects thermal state enhances transfer from surface under irradiation. This enhancement is achieved utilizing porous polymeric structure materials, facilitates improved pathways reflectance...