Elijah T Adesuji

Centro de Investigación en Materiales Avanzados · Departamento de Materiales Nanoestructurados

The current challenges in developing novel nanotechnological processes have led us to explore new methods for synthesizing nanomaterials whose functionalities rely on their structural complexity. In this respect, nature has always been a source of inspiration for proposing innovative technologies to improve the quality of life. Hierarchical superst...

In this work, we report the synthesis of a Cu (II) based metal–organic frameworks (HKUST-1) by mechanochemical method and metal-oxide–carbon nanocomposite (CuO@C) as thermolysis products. The prepared HKUST-1 and composite were characterized by elemental CHNS/O microanalysis, scanning electron microscopy equipped with energy dispersive X-ray spectr...

Bicontinuous microemulsions as confined nanoreactor and template for plasmonic superstructures

Vertically-aligned nitrogen-doped carbon nanotubes (v-N-CNTs) were synthesized \textit{via} the chemical vapour deposition (CVD) technique. 1-ferrocenylmethyl(2-methylimidazole) was employed as the source of the Fe catalyst and was dissolved in different ratios of acetonitrile/benzophenone feedstock which served as both the carbon, nitrogen, and ox...

Bicontinuous microemulsions (BCME) were used to synthesize hierarchical superstructures (HSs) of Pt-Co 3 O 4 by reduction/precipitation. BCMEs possess water and oil nanochannels, and therefore, both hydrophilic and lipophilic precursors can be used. Thus, PtAq-CoAq, PtAq-CoOi, PtOi-CoAq and PtOi-CoOi were prepared (where Aq and Oi stand for the pre...

Plasmonic superstructures may concentrate hot spots both on the external surface and within the inner gaps of the assembly. However, these materials are usually obtained by two-steps procedures from the synthesis of plasmonic nanoparticles to their 3D assembly. The interconnected nano-network of water and oil channels in a bicontinuous microemulsio...

The possibility to harness the intrinsic properties of bicontinuous microemulsions (BCME) has led to their application as nanocages in the synthesis of nanocoral-shaped Pt hierarchical superstructures (PtHSs). We employed two different platinum precursors (oil-soluble and water-soluble) and sodium borohydride (NaBH4) was used as reducing agent. PtH...

Hierarchical or 3D nanostructures, which are made up of interconnected nanoscaled units, exhibit large surface area and high porosity which are of high interests because of their excellent electrocatalytic properties [1]. These nanostructures are easily achievable and convenient to prepare using template assisted assembling of building units. Bicon...

Hierarchical superstructures (HSS) are three-dimensional structures with a significant improvement in some properties as compared to isolated nanoparticles. In the case of plasmonic materials, such as silver, a 3-D arrangement induces higher hot spots concentration which increase the electric field in the entire superstructure. This behavior can be...

The development of nanoparticles of a particular material allows to change their physical and chemical properties, in order to achieve better performances and novel applications. In the late 1980s, researchers found that combinations of semiconductor nanoparticles in particular configurations show better or new properties than their corresponding s...

In this report we synthesized silver nanoparticles in a one axis clinostat using Ocimum gratissimum leaf extract in order to examine the material properties in a simulated microgravity condition. The sample holder was carefully design to accommodate the mixing ratio of the leaf extract and the silver salt (AgNO3) used in the green synthesis. The cl...

In this work, Corchorus tridens (bush okra) seeds were exposed to 72 hours of simulated microgravity condition using a one-axis clinostat. The seeds were sown on a 1.5% combination of plant nutrient and agar-agar solidified medium in three Petri dishes. One of the Petri dishes was mounted on the clinostat and allowed to rotate at the speed of 20 rp...

Fabrication of hierarchical noble metal nanostructures is of interest due to the unique structural arrangement of nanoscale building blocks: nanocrystals or nanoparticles, composition and size are important in taking the physical and chemical usefulness of metal nanomaterials to a macroscopic scale. Various methods have been employed in achieving n...

The current high global demand for high-quality paper, paint, adhesive/sealant, and plastic, filler industries cannot survive without unique and high-quality precipitated calcium carbonate (PCC). They are used as fillers, additives, and reinforcements. PCC is a key constituent of the modern paper and plastic industry. This article reports the effec...

Microgravity is known to be a major abiotic stress in space which affects plants depending on the duration of exposure. In this work, tomatoes seeds were exposed to long hours of simulated microgravity condition using a one-axis clinostat. The seeds were sown on a 1.5% combination of plant nutrient and agar-agar solidified medium in three Petri dis...

We have investigated the green synthesis and antimicrobial activity of silver nanoparticles using Garcinia kola. Aqueous extract of G. kola was used to reduce AgNO 3 solution to obtain black nanocrystal of silver nanoparticles. Antimicrobial activity of the silver nanoparticles was tested against Escherichia coli, Klebsiella pneumonia, Bacillus sub...

Biosynthesized silver nanoparticles (AgNPs) using Cassia hirsuta aqueous leaf extract were reported in this study. Th synthesis was optimized by measuring various parameters such as temperature, time, volume ratio, and concentration. The surface plasmon resonance at 440 nm for 30∘C and 420 nm for both 50∘C and 70∘C measured using the UV-Vis spectro...

Biosynthesizing of silver nanoparticles using microorganisms or various plant parts have proven more environmental friendly, cost-effective, energy saving and reproducible when compared to chemical and physical methods. This investigation demonstrated the plant-mediated synthesis of silver nanoparticles using the aqueous leaf extract of Thevetia pe...

In this report, synthesis, growth and formation kinetics of silver nanoparticles mediated by various plant extracts in their biodiversity have been monitored using UV–Vis spectrophotometer by sampling at time intervals during bioreduction process. Plasmon band resonance of the silver nanoparticles was observed as the reaction progresses indicating...

The monoazo dyes, 4-carboxyl-2, 6-dinitrophenylazohydroxynaphthalenes dyes (AZ-01, AZ-03 and AZ-04), were evaluated as a highly selective colorimetric chemosensor for cyanide ion. The recognition of cyanide ion gave an obvious colour change from light yellow to brownish red and upon dilution with acetone produced a purple to lilac colour. Optimum c...

In this research work carried out at the Chemistry Laboratory of Federal University Lafia, silver was nanostructured using some alcoholic beverages obtained from Nigeria. There has been much interest as regards to readily available substrates or environmentally friendly materials that will give nano-silver apart from the known and established metho...

Pineapple leaf was used in this study for the synthesis of silver nanoparticles based on the search for sustainable synthetic means. Indeed, this offered an economical and sustainable synthetic route relative to expensive and toxic chemical methods. The leaf extract was used and the corresponding nanoparticles obtained were subjected to UV–vis anal...

In this research work carried out at the Chemistry Laboratory of Federal University Lafia, silver was nanostructured using some alcoholic beverages obtained from Nigeria. There has been much interest as regards to readily available substrates or environmentally friendly materials that will give nano-silver apart from the known and established metho...