Significant advances in smart material actuators have taken place the past decade. The holy grail of actuator research is an architecture that can generate high displacement and force throughout a broad frequency range while not consuming significant amount electrical power. large appeal using stems from their mechanical energy density. However, all generally at least one shortcoming involving either stroke, force, or capability. Whenever speed consideration, piezoelectric actuation most...

A method for the preparation of anatase TiO2, which is stable to a temperature as high 900 °C, without using any complex cationic dopants presented. The synthetic procedure involves reaction titanium tetraisopropoxide (TTIP) with trifluoroacetic acid (TFA) followed by hydrolysis and sol−gel conversion xerogel further calcination. retention phase temperatures can be attributed presence small amounts fluorine in lattice, gradually removed between 500 °C confirmed X-ray photoelectron...

High-performing, durable electrocatalysts, capable of maintaining industrial current densities (200–700 mA cm −2 ), are needed.

A very useful anti‐reflection (AR) coating, having characteristics quite similar to silicon monoxide, has been grown on P+N solar cells by a simple technique. ESCA, infrared absorption, and ellipsometry analysis of the films indicated that they consist oxide with some bound hydrogen. Some added advantages new AR coating are described.

In this study, new composite materials comprising zeolitic imidazolate framework (ZIF) structures and microchannel glass (MCG) plates were fabricated using the hydrothermal method their morphological spectral properties investigated XRD, SEM, FTIR, Raman spectroscopy. XRD studies of powder samples revealed presence an additional phase for a ZIF-8 sample, whereas ZIF-67 samples, which prepared through two different chemical routes, showed no phases. A detailed analysis FTIR micro-Raman...

This research experimentally examined the efficacy of a shell & tube heat transfer running on nanofluids composed copper nanoparticles with water (Cu-W) and alumina (Al 2 O 3 -W). Surface treatment was omitted during preparation Cu-W Al -W nanofluids. Research focused how their concentration in given volume affected coefficient transfer, pressure drop, viscosity, thermal conductivity, Nusselt number. Because one-of-a-kind intrinsic properties, results demonstrated that nanofluids’...

Pore formation by electrochemical etching of p-type silicon in organic electrolytes has been studied. (100)-oriented wafers were prepatterned using a standard lithographic process to form pits known spatial period that act as nucleation sites for the pore formation. It was found first time that, samples, two types macro-pores could be formed on same substrate. The type originates from obtained prepatterning process. second is spontaneously result self-organization These 'additional' pores...

Self-organization of nanoparticles into hierarchical assemblies is very important for the development "bottom-up" approaches in nanotechnology. Porous silicon can be used as a substrate to prepare fractal-like magnetite nanoparticle assemblies, which add new dimension nanoscale spin electronics each small portion fractal viewed reduced-scale replica whole (see figure). Supporting information this article available on WWW under http://www.wiley-vch.de/contents/jc_2296/2006/z500521_s.pdf or...

Methods for the growth of metal–organic framework (MOF) HKUST-1 on bulk glassy carbon have been developed.

Abstract In this paper a novel technique for the production of aluminosilicate microtubes, which are shown to act as optical cylindrical microresonators, is described. The free‐standing microtubes fabricated by using vacuum‐assisted wetting and filtration silica gel through microchannel glass matrix. studied scanning electron microscopy, micro‐photoluminescence spectroscopy, fluorescence lifetime imaging confocal microscopy. emission spectra microresonators we find very narrow periodic peaks...

Despite their potential for facilitating high activity, thin-film conducting polymer supports have, historically, expedited only relatively weak performances in catalytic water oxidation (with current densities the μA/cm2 range). In this work, we have investigated conditions under which polymers may synergistically amplify catalysis. A composite film has been developed that, when overcoated on a bare Pt electrode, amplifies its performance by an order of magnitude (into mA/cm2 When poised at...

Piezoelectric actuators have been used for active vibration control, noise suppression, health monitoring, etc. The large appeal in using smart material stems from their high mechanical energy density. A relatively new actuator (THUNDER) has overcome the displacement hurdles that plagued traditional piezoelectric based actuators. It is capable of providing a on order 0.5 cm. This allows to be some underwater applications, such as propulsion. To date electrical power consumption and...

The functionalisation of macro- and meso-porous silicon surfaces with ferrocene groups using organometallic approaches has been performed via an organic (3-halogenpropyl) siloxy spacer or direct bonding. FTIR spectroscopy used for characterisation the surface at each step chemical processes.

The authors demonstrate a new route to the fabrication of individual aluminosilicate microtubes that can act as micron-scale optical cylindrical resonators. were prepared using simple vacuum assisted wetting and filtration through microchannel glass matrix. Microphotoluminescence spectra microtube cavity show sharp resonant modes with quality factors up 3200. A strong reduction emission decay time at high excitation power confirms occurrence amplified spontaneous from single microtube.

Piezoelectric actuators have been used for active vibration control, noise suppression, health monitoring, etc. The large appeal in using smart material stems from their high mechanical energy density. A relatively new actuator Thin Layer Composite Unimorph Ferroelectric Driver and Sensor (THUNDER) has overcome the displacement hurdles that plagued traditional piezoelectric based actuators. It is capable of providing a order 0.5 cm. This allows to be some underwater applications, such as...

Abstract The functionalisation of semiconductor (particularly silicon) surfaces have been an active area research in the past two decades. surface modification silicon has opened up new potential applications this material. In present work macroporous effectively functionalised using tetrazine derivatives. involved: i) preparation cyclopentadienyl‐modified surfaces; (ii) by cycloaddition tetrazines with dimethyl pyrazolyl functionality; (iii) characteristion samples electron microscopy,...

Thin films of vapor-phase polymerized PEDOT incorporating various cationic Mn porphyrins were assessed for water oxidation catalysis under light illumination. Only Mn(III)TPP/PEDOT displayed a notable photocurrent and this was, counter-intuitively, greatest at the lowest loading levels examined. Studies revealed that proportion Mn(III)TPP within became demetalated during polymerization, leaving free protonated TPP. Despite presence an excess chemical oxidant polymerization step, Mn(III) ion...

Zinc aluminate (ZnAl2O4), with a spinel structure is known for its versatile applications as catalyst, ceramic material, and optoelectronic device. ZnAl2O4 an excellent host trivalent rare-earth ions such Dy3+, Tb3+, Eu3+ Sm3+ has been extensively investigated application in display devices. The focus of this work on Ce3+ co-dopants aiming to address issues multistage combustion synthesis routes, the formation secondary phases, that often impact luminescence intensity. Through systematic...

<div class="section abstract"><div class="htmlview paragraph">Abstract</div><div paragraph">A two-wheeler is exposed to various dynamic loads transferred from roads and input given by the vehicle prime mover, which leads occurrence of torque on wheel transmission. Torque generated depends terrain riding pattern users for majority, so it becomes important develop a duty cycle transmission considering multiple events enabling us understand durability standard component...