Ice formation can have catastrophic consequences for human activity on the ground and in air. Here we investigate water freezing delays untreated coated surfaces ranging from hydrophilic to superhydrophobic use these evaluate icephobicity. Supercooled microdroplets are inkjet-deposited coalesce until spontaneous of accumulated mass occurs. Surfaces with nanometer-scale roughness higher wettability display unexpectedly long delays, at least 1 order magnitude longer than typical larger...

To evaluate the safety dose range of ethanolic extract from leaves Pericampylus glaucus (Lam.) Merr. by acute and sub-acute oral toxicity study on animal model. The was carried out as per Organization for Economic Co-operation Development guidelines 423 407. In study, (300, 2000 4 000 mg/kg) tested plant administered to three groups in single general behavior, adverse effects mortality were determined up 72 h compared normal group. crude orally at doses 600 1 mg/kg 28 days two animals their...

Photoluminescence of SnO₂ nanoparticles.

Raman forbidden modes and surface defect related features in SnO_2 nanostructures carry information about disorder defects which strongly influence important technological applications like catalysis sensing. Due to the weak intensities of these peaks, it is difficult identify by using conventional spectroscopy. Tip enhanced spectroscopy (TERS) studies conducted on nanoparticles (NPs) size 4 25 nm have offered significant insights prevalent disorders. Along with one order enhancement...

Abstract Sustained aceclofenac release cationized starch–alginate beads were developed through ionotropic gelation. The effects of sodium alginate and starch amounts as independent process variables on drug encapsulation, optimized using central composite design. showed encapsulation efficiency 88.26 ± 3.78% cumulative 26.28 1.21% after 6 h dissolution. average size all these ranged from 1.08 0.08 to 1.48 0.18 mm. characterized by scanning electron microscope, Fourier transform‐infrared...

The role of quantum dots (QDs) SnO2 in detecting low concentrations methane (CH4) at a relatively temperature ∼150 °C with high response (S ∼ 3.5%) and time below 1 min is reported. A simple room single step chemical process was adopted for the growth nanoparticles size around 2.4 nm. These were subsequently annealed 800 to increase grain 25 as-prepared nanoparticles, being smaller than corresponding Bohr radius (2.7 nm), showed strong confinement effect blue shift band gap energy from 3.6...

The effects of two prominent copper oxide nanoparticles (CuO-NP and Cu2O-NP), with the oxidation state Cu++ (cupric) Cu+ (cuprous), on Candida albicans were evaluated. CuO-NP Cu2O-NP synthesized characterized by XRD, FESEM, HR-TEM Zeta potential. At sub-MIC (50 µg ml−1), both cupric cuprous NPs prevented yeast-to-hyphae switching wrinkling behaviour in C. albicans. mechanism for antifungal action differed; significantly elicited reactive oxygen species, whereas membrane damage was more...

The phase mode of electrostatic force microscopy (EFM-phase) is a scanning probe (SPM) technique used to measure gradient. EFM-phase has higher resolution than Kelvin (SKPM or SKM), but unlike SKPM it does not yield direct measurement local potential. Analytical calculations tip–surface capacitances and their gradients are presented, the origin in explained based on calculation results. We show that data fit analytical well, can be interpreted using simple analytic model, which allows shift...

We report design and synthesis of polymer-based large-area superhydrophobic carbon nanofiber (CNF) composite coatings for tunable electromagnetic interference shielding attenuation in the terahertz (THz) frequency regime. Such with different CNF/polymer weight ratios are characterized by a domain THz spectroscopy system. A maximum effectiveness ∼32 dB was measured examined range 570–630 GHz. Coating level varied CNF loading. Two-dimensional distributions power at 600 GHz showed good spatial...

Surfaces patterned with alternating (binary) superhydrophobic–superhydrophilic regions can be found naturally, offering a bio-inspired template for efficient fluid collection and management technologies. We describe simple wet-processing, thermal treatment method to produce such patterns, starting inherently superhydrophobic polysilsesquioxane–silica composite coatings prepared by spray casting nanoparticle dispersions. Such become superhydrophilic after localized means of laser irradiation...

Abstract Vanadium oxides are anticipated as a high-performance energy storage electrode due to their coupled double layer and pseudo-capacitative charge mechanism. In the present work, we investigated influence of different structural phases as-grown VO 2 nanoporous structure corresponding oxidation states on supercapacitor performance. This facilitates fast ion diffusion transport. It is shown that stoichiometric monoclinic , with V state +4, provides superior capacity capacitance value 33...