The corrosion resistant performance and durability of the superhydrophobic surface on magnesium alloy coated with nanostructured cerium oxide film fluoroalkylsilane molecules in corrosive NaCl aqueous solution were investigated using electrochemical contact angle measurements. 5 wt% was elucidated. formed estimated by impedance spectroscopy (EIS) EIS measurements appropriate equivalent circuit models revealed that considerably improved AZ31. American Society for Testing Materials (ASTM)...

Vertically aligned ZnO nanotubes were prepared by etching rod arrays in aqueous solution, which previously developed chemical bath deposition method. The morphological, structural, photoluminescence, as well photocatalytic properties of the examined with respect to pH values solution. morphology products was found be sensitive and temperatures. synthesized at a low value (5.82) exhibited strong UV emission weak defect-related visible emission. highest efficiency also observed = 5.82....

The detection of low-concentration gases and odors in fields such as healthcare, mobility, indoor environment control is attracting tremendous attention. development high-sensitivity gas sensors capable detecting low concentrations molecules strongly desired. This review focuses on tin oxide nanomaterials, which are substances that being actively researched semiconductor-type sensors. In particular, the novel nanomaterials over last decade their sensing applications discussed. It revealed...

This paper discusses the direct fabrication of ultrathin Ni(OH)2 nanosheets on substrates via a facile solvothermal process, which is free from use additional surfactants. The precursor converted into porous NiO heat treatment. thickness and morphology controlled by manipulating ethanol content in solvent. acetone sensing performance all samples has been evaluated, as observed, 75% ethanol-based gas sensor (NiO-75), demonstrates ultrahigh sensitivity, response value can reach 60%, when...

A transparent, high purity, amorphous titanium dioxide thin film composed of densely packed nanometer-sized grains has been successfully deposited on a glass substrate at room temperature from an aqueous peroxotitanate solution using simple, inexpensive, reproducible, and environmentally friendly method. The as-deposited was 117 nm thick closely particles 10–15 in diameter, but they aggregated into large 50–100 diameter. obtained by dissolving metatitanic acid (H2TiO3) mixture concentrated...

SnO2 nanosheets with the (101) crystal face mainly exposed were prepared to investigate their sensing properties. The ∼150 nm in size and well-dispersed on sensor chip. gas properties of investigated for CH4, C2H4, C2H6, C3H6, C3H8, 1-C4H8, cis-2-C4H8, trans-2-C4H8, iso-C4H8, n-C4H10 gases. Additionally, relationship between signal response orbital energy target molecules was investigated. It found that exhibited remarkable selectivity alkene gases which have high HOMO energies. presence...

The development of a facile gas sensor for the ppb-level detection acetone is required realizing health diagnosis systems that utilize human breath. Controlling crystal facet nanomaterial an effective strategy to fabricate high-response without novel metal catalyst. Herein, we successfully synthesized SnO2 nanosheet structure, with mainly exposed (101) facets, using SnF2 aqueous solution at 90 °C. nanosheets obtained after various synthesis durations (2, 6, and 24 h) were investigated....

A novel design of white light emitting diodes (WLEDs) emerges to meet the growing global demand for resource sustainability while preserving health and environment. To achieve this goal, a facile method is developed chemical synthesis luminescent silicon nanocrystal (ncSi) with large Stokes shift between absorption emission. The WLED prepared by simple spin‐coating method, contains hybrid‐bilayer ncSi polymer in its device active region. Interestingly, well‐controlled ultrathin layer on...

CeO2 nanocubes with metastable {100} facets and nanooctahedrons the most stable {111} are herein fabricated by controlling morphology of nanoparticles. SnO2 nanosheet-based assembled films coated these or yield nanocubes/SnO2 nanosheets nanooctahedron/SnO2 nanosheet hybrid gas sensors, respectively. The sensors nanoparticles exhibited enhanced sensing responses to numerous chemical species relative a pristine sensor, including acetone, hydrogen, ethanol, ammonia, acetaldehyde, allyl...

NiO nanosheets are synthesized in situ on gas sensor chips using a facile solvothermal method. These then used as sensors to analyze allyl mercaptan (AM) gas, an exhaled biomarker of psychological stress. Additionally, MnO2 onto the surfaces enhance gas-sensing performance. The response nanosheet is higher than that @NiO sensor. value can reach 56.69, when detects 40 ppm AM gas. Interestingly, faster time (115 s) obtained exposed Moreover, selectivity toward about 17-37 times greater those...

We report on the photoinduced superhydrophilicity of surface amorphous TiO2. Amorphous TiO2 thin films were prepared self-assembled monolayers by peroxotitanate-complex deposition (PCD) and liquid-phase (LPD) methods. The morphology topography characterized in detail. contact angles 34° 66° for as-deposited through PCD LPD methods, respectively, which slowly increased to about 70° 73° after being stored air. After irradiation UV light, angle vanished exhibited superhydrophilicity....

Plate-like particles of Ca3Co4O9 have been prepared in which Bi and Na were partially substituted for Ca to improve the thermoelectric performance. Successfully fabricated dense highly textured ceramics obtained by combining templated grain growth technique (TGG) with hot-pressing (HP). single crystals, alternating layers Co–O Ca–Co–O direction c-axis, show high electrical conductivity along layer compared that across layer. Hence, a oriented TGG + HP specimen showed sintered under uniaxial...

Siloxane-anchored, self-assembled monolayers (SAMs) on single crystal Si were prepared with a variety of surface functional groups using commercially available surfactant (1-bromo-11-(trichlorosilyl)undecane) followed by in situ transformations. Polar (thioacetate and thiol), nonpolar (methyl), acidic (sulfonic carboxylic), basic (various amines), ionic (alkylammonium) functionalities prepared. For primary amine sulfonate surfaces, the degree charge as function pH was determined ex X-ray...

Site-selective deposition of UV- and visible-light-emitting ZnO crystals was successfully achieved in an aqueous solution at low temperature. Molecular recognition effectively utilized for patterning on self-assembled monolayers. Crystalline further controlled to have different morphologies such as cylindrical hexagonal rods, ellipses, or multineedle shapes by changing the conditions improve photoluminescence properties. All emitted strong UV visible regions with emission spectra. The novel...

A hydrotalcite-like film has been successfully deposited on an Al-bearing glass substrate based interface reaction between Al layer and a zinc aqueous solution. The selectively grew the surface but not surface. was composed of layered nanosheets compound containing Zn. Comparably, deposits plastic precipitates in solution were wurzite-type ZnO with various morphologies depending upon preparation conditions. At low supersaturation degrees, single crystals superstructures Zn-Al hydrotalcite...

Alkanoic and phosphonic acid derived self-assembled monolayers (SAMs) were formed on magnesium alloy by the vapor phase method. AFM XPS studies showed that SAMs Mg alloy. The chemical anticorrosive properties of prepared alloys characterized using contact angle measurements, X-ray photoelectron spectroscopy (XPS), electrochemical measurements. Water measurements revealed that, although SA ISA have same headgroup to anchor surface, packing density surface could be considerably different....

Crystal growth-controlled Co3O4 nanoparticles were prepared to examine gas sensing properties. A cube-like, an irregular shaped, and three kinds of raspberry-type structures observed by morphology analysis. The have expanded lattice volume with a large oxygen deficiency area, the cube-like structure has contracted as compared shaped structure. exhibited higher sensor signal response than others. relationship between properties crystal defect was investigated, it revealed that selectivity...

The nucleation and growth process of anatase TiO2 on several kinds self-assembled monolayers (SAMs) in an aqueous solution has been evaluated detail. Homogeneously nucleated particles amino groups SAM showed negative or positive ζ potential the solution, respectively. adhesion to group surface by attractive electrostatic interaction caused rapid thin films supersaturated at pH 2.8. On other hand, was deposited SAMs without regardless type 1.5 whose degree supersaturation is low as a result...

Novel processes to realize low-dimensional arrangement of SiO2 particles were proposed. Particle wires and a pattern the close-packed particle monolayer fabricated in solution at room temperature. SAMs (self-assembled monolayers) formed on Si substrates modified be suitable for templates precise arrangement. Particles arranged precisely desired positions using well-controlled electrostatic interactions chemical bond formation between substrates.