Assignments got your hair on fire?

Douse the flames with our full-range writing service!

Experienced academic writing professionals are at your fingertips. Use this handy tool to get a price estimate for your project.

Science news and science articles from New Scientist

Abstract:
The ordered porous anodic aluminum oxide (AAO) is one of the famous nano-templates usedas etching mask for pattern transfer and for synthesis of nanocomposite materials for wideapplications. Conventional AAO templates were synthesized using two-step potentiostaticmethod of direct current anodization (DCA) at low temperature (0-10°C) to avoid dissolutioneffect. In this talk, the synthesis and characteristics of AAO using conventionallow-temperature anodization and an effective method of room-temperature hybrid pulseanodization (HPA) are presented for the comparison. The HPA with normal-positive andsmall-negative voltages for AAO synthesis can be accomplished at relatively hightemperature of 15-25°C for enhancing AAO characteristics from both the cheap low-purity(99%) and costly high-purity (99.997%) aluminum foils. The pore distribution uniformity andcircularity of AAO by HPA is much better than DCA due to its effective cooling at hightemperature. The impurity effect on AAO characteristics is also discussed. HPA is differentfrom the traditional pulse-anodization with alternating both high and low positive potentialdifferences (/currents) or both one-positive and one-zero potential differences. HPA not onlymerits manufacturing convenience and cost reduction but also promotes pore distributionuniformity of AAO at severe conditions of low-purity Al foils and high temperature. Someapplication in humidity sensing, photoluminescence and SERS will be presented.

Abstract:
Zeolitic imidazolate frameworks (ZIFs), a subclass of metal-organic frameworks (MOFs), havebeen recently employed in various fields such as gas separation, catalysis, water purification anddrug delivery.1 Their high importance is due to their chemical and thermal stability in addition tothe flexibility of their design. ZIFs have been synthesized solvothermally or at room temperatureusing organic solvents (e.g. methanol, DMF) or pure water.2 The control of size and morphologyof crystals has been achieved using reverse microemulsion methods, microwave, ultrasoundassistedsyntheses and coordination modulation methods.1-3 Herein, we investigate a newsynthesis method where ZIF crystals are produced using the reaction-diffusion framework (RDF)in a gel medium at room temperature. The method is based on the diffusion of an outer solutionof the organic linker or mixed linkers into an agar gel containing the inner metal ions Zn(II)and/or Co(II) where a precipitation reaction takes place leading to the formation of the ZIFcrystals. A propagating supersaturation wave, initiated at the interface between the outer solutionand the gel matrix leads to a precipitation front endowed with a gradient of crystal sizes rangingbetween 100 nm and 55 μm along the same reaction tube. While the precipitation fronts of ZIF-8 and ZIF-67 travel the same distance for the same initial conditions, ZIF-8 crystals therein areconsistently smaller than the ZIF-67 crystals due to the disparity of their rate of nucleation andgrowth. The effects of temperature, the concentration of the reagents, and the thickness of thegel matrix on the growth of the ZIF crystals are investigated. We also show that by using RDF,we can envisage the formation mechanism of the ZIF crystals, which consists of the aggregationof ZIF nanospheres to form the ZIF-8 dodecahedrons. Moreover, using RDF the formation of asolid-solution ZIF via the incorporation of Co(II) and Zn(II) cations within the same frameworkis achieved in a controlled manner. Finally, we demonstrate that doping ZIF-8 by Co(II)enhances the photodegradation of methylene blue dye under visible light irradiation in theabsence of hydrogen peroxide.

Title of Talk: Effect of Different Templates on the Synthesis of Mesoporous Sodalite

More SOS Past Articles coming..

Title of Talk: Effect of Different Templates on the Synthesis of Mesoporous Sodalite

Abstract:
Lasienthra africanum (LA) leaf extract was employed for nano-silver synthesis. The reducing effect of the plant extract was investigated at different times, pH, temperatures and concentrations. The effect of various kinetic parameters was studied using UV–vis spectroscopy. Blue-shifted surface plasmon bands indicating smaller sized nanoparticles were obtained at neutral pH (6.8–7.0), temperature of 65◦C and concentration ratio of 1:10 (leaf extract: AgNO3) with increasing reaction times under the reaction conditions. The kinetics of the reaction followed pseudo-first- and -second-order rate equations, and was thermodynamically favoured at higher time. Spherically shaped nanoparticles were obtained at different reaction conditions.

Abstract:
The current interest of our research group is largely focused on the development and understanding of precipitated crystalline organometallic compounds. We are placing a strong emphasis in the study of the synthetic procedures, the morphology, and on the structural determination of such compounds. Special importance is engaged in the preparation coordination polymers crystallized from solutions of supercritical CO2, (scCO2), where the use of a co-solvent is occasionally employed depending on reagents solubility [1-3]. The correct selection of experimental conditions in the scCO2 reactive crystallization technique, allows a precipitation known from other methodologies, as well as new crystalline phases. This procedure leads to the crystallization of stable hierarchical nanoestructures involving micro and mesoporosity. As the preparation of the crystalline materials is carried out in scCO2, these obtained with microporous structures were recovered activated, i.e., with open volume, since the removal of any guest molecules from the framework is carried out by simple depressurization. This method is expected to have many potential applications in the development of green crystallization techniques for coordination polymers synthesis.

On 15 June 2016 Sound On Sound launched our new website

Title of Talk:
Plant-mediated biosynthesis of silver nanoparticles by leaf extracts of Lasienthra africanum and a study of the influence of kinetic parameters

Currently, it houses over 9,414 quality reviews/ techniques/ interviews/ tutorial articles

Title of Talk: Plant-mediated biosynthesis of silver nanoparticles by leaf extracts of Lasienthra africanum and a study of the influence of kinetic parameters

Versatile Services that Make Studying Easy
We write effective, thought-provoking essays from scratch
We create erudite academic research papers
We champion seasoned experts for dissertations
We make it our business to construct successful business papers
What if the quality isn’t so great?
Our writers are sourced from experts, and complete an obstacle course of testing to join our brigade. Ours is a top service in the English-speaking world.
How do I know the professor won’t find out?
Everything is confidential. So you know your student paper is wholly yours, we use CopyScape and WriteCheck to guarantee originality (never TurnItIn, which professors patrol).
What if it doesn’t meet my expectations?
Unchanged instructions afford you 10 days to request edits after our agreed due date. With 94% satisfaction, we work until your hair is comfortably cool.
Clients enjoy the breezy experience of working with us
Click to learn our proven method

Tabtight professional, free when you need it, VPN service.


Program | 6th World Congress and Expo on …

Title of Talk: Influence of the support used on the morphology of the template synthesized intermetallic (Co-Sn, Ni-Sn, Co-Ni) nanopareticles

View session wise speaker sessions below

Abstract:
Inorganic semiconductors have recently drawn a huge attention due to their low cost of synthesis and multifunctional applications. Since nickel and titanium oxides have shown to exhibit unique properties separately, nickel titanate was synthesized demonstrating synergistic behavior. Afterwards, it was linked with the reduced graphene oxide, which displays large surface area, high electrical conduction, good electron transport rates and improves dispersity of the inorganic semiconductors. The proposed composite material was utilized for the construction of the glucose sensitive electrochemical sensor of the increased electrocatalytic performance. Applicability of the designed biosensor was shown towards glucose determination in human body fluids.

89%
of clients claim significantly improved grades thanks to our work.
98%
of students agree they have more time for other things thanks to us.
Clients Speak
“I didn’t expect I’d be thanking you for actually improving my own writing, but I am. You’re like a second professor!”