Evaporated gold island films have been the subject of studies dealing with a variety spectroscopic and sensing applications. Development these other applications requires film stability as well tunability morphology optical properties films. In present work, ultrathin, island-type were prepared by evaporation 1.0−15.0 nm (nominal thickness) at rate 0.005−0.012 s-1 onto glass substrates modified 3-mercaptopropyl trimethoxysilane (MPTS), latter used to improve Au adhesion glass. The films,...

The preparation of conductive and transparent gold/silver nanowire mesh films is reported. nanowires formed after the reduction metal ions was triggered a thin growth solution film spread on substrate. Metal progressed within template highly concentrated surfactant liquid crystalline mesostructure substrate during drying to form ordered bundles ultrathin nanowires. exhibited metallic conductivity over large areas, high transparency, flexibility.

Ultrathin gold films prepared by evaporation of sub-percolation layers (typically up to 10 nm nominal thickness) onto transparent substrates form arrays well-defined metal islands. Such display a characteristic surface plasmon (SP) absorption band, conveniently measured transmission spectroscopy. The SP band intensity and position are sensitive the film morphology (island shape inter-island separation) effective dielectric constant surrounding medium. latter has been exploited for chemical...

The effect of contact angle hysteresis (CAH) was studied on various polymer substrates with traditional and new experimental techniques. technique presented in the article is based slow deformation droplet, thus CAH under constant volume drop contrast to existing techniques when changed measurement. energy calculated framework improved Extrand approach. advancing established a good agreement that measured needle-syringe method. receding angles three demonstrated very significant discrepancy....

The mechanisms of floating and sliding liquid marbles are studied. Liquid containing CaCl(2) NaOH water solutions float on Na(2)CO(3) an alcoholic solution phenolphthalein with no chemical reaction. Sliding marbles, consisting solutions, polymer substrates coated is studied as well. No reaction observed. These observations supply direct experimental evidence for the suggestion that interfaces separated by air layer when roll solid substrates. It concluded a marble rests hydrophobic particles...

The surface of water "marbles" obtained with hydrophobic lycopodium and polyvinylidene fluoride particles was investigated first environmental scanning electron microscopy. shape marbles studied both experimentally theoretically. mathematical model describing the deformation by gravity is proposed. allowed calculation effective tension gives 0.09 J/m2 for coated PVDF 0.06 lycopodium. tensions calculated independently horizontal vibration were in semiquantitative agreement above values (0.07...

Phase transitions in organic and inorganic materials are well-studied classical phenomena, where a change the crystal space group symmetry induces wide variation of physical properties, permitted by crystalline each phase. Here we observe conformational induced transition bioinspired peptide nanotubes (PNTs). We found that PNTs their original molecular assembly from linear conformation to cyclic one, followed nanocrystalline structure noncentrosymmetric hexagonal centrosymmetric orthorhombic...

To fully exploit their full potential, new semiconductor nanowire building blocks with ab initio controlled shapes are desired. However, and despite the great synthetic advances achieved, ability to control nanowire's geometry has been significantly limited. Here, we demonstrate a simple confinement-guided growth method that enables predesign not only chemical physical attributes of synthesized nanowires but also allows perfect unlimited over geometry. Our synthesis in wide variety...

Increase in anthropogenic pCO2 alters seawater chemistry and could lead to reduced calcification or skeleton dissolution of calcifiers thereby weaken coral-reef structure. Studies have suggested that the complex diverse responses stony coral growth calcification, as a result elevated pCO2, can be explained by extent which their soft tissues cover underlying skeleton. This study compared effects decreased pH on microstructural features both hospite (within colony) isolated sclerites (in...

Additively manufactured (AM) materials and hot rolled are typically orthotropic, exhibit anisotropic elastic properties. This paper elucidates the properties (Young’s modulus, shear Poisson’s ratio) of Ti6Al4V alloy in four different conditions: three AM (by selective laser melting, SLM, electron beam EBM, directed energy deposition, DED, processes) one wrought (for comparison). A specially designed polygon sample allowed measurement 12 sound wave velocities (SWVs), employing dynamic...

The wetting of rough honeycomb micrometrically scaled polymer substrates was studied. A very strong dependence the apparent contact angle on drop volume has been established experimentally. environmental scanning electron microscopy study fine structure triple line is reported first. not smooth and prefers grasping matrix over air holes. precursor rim surrounding observed. revealed explained by transition between pure Cassie combined Wenzel-Cassie regimes, which induced capillarity...

We have employed a variety of experimental methods, including DC and AC conductivity, scanning electron microscopy (SEM), atomic force (AFM), differential calorimetry (DSC), Fourier Transform Infrared (FTIR) spectroscopy, pulsed field gradient nuclear magnetic resonance (NMR), to investigate the poly(ethylene oxide):LiI system. The effect stretching polymer electrolyte on its conductivity is dramatic, resulting in up 40-fold increase LiI P(EO)7 composition. Structural ordering imposed by...

The distance dependence of the localized surface plasmon (SP) extinction discontinuous gold films is a crucial issue in application transmission resonance (T-SPR) spectroscopy to chemical and biological sensing. This derives from usual sensing configuration, whereby an analyte binds selective receptor layer on film at certain metal surface. In present work sensitivity T-SPR 1.0-5.0 nm (nominal thickness) island evaporated silanized glass substrates studied by using coordination-based...

The wettability analysis is often used to characterize a surface in micro and nanometer scale. At these small scales, effects of the contact line tension are also expected play significant role. Wettability effect studied using environmental scanning electron microscopy on silicon dioxide modified by low-energy irradiation method. Electron-induced variation patterning at micrometer scale substrate allow investigating angle dependence water droplet curvature calculating values three-phase...

A plasma column ejected directly from solid copper by localized microwaves is studied. The effect stems an induced hotspot that melts and emits ionized vapors as a confined fire column. Nanoparticles of ∼20–120 nm size were revealed in the situ small-angle x-ray scattering. Optical spectroscopy confirmed dominance particles originating substrate. Nano- macroparticles verified also ex scanning electron microscopy. direct conversion metals to nanoparticles demonstrated various applications are...

The secondary electron emission flux in a scanning microscope is powerful tool for delineation of electrically active dopant concentration, built-in potentials, and surface electric fields semiconductor junctions. In all the images p-n junctions, p-doped regions appear brighter than n-doped regions. We present theory doping contrast junctions that based on yield band bending extracted from Kelvin probe force microscopy measurements. show governed by escape depth, their probability which...