H. G. Hassanin

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In the study, a novel and low cost nanofabrication process is proposed for producing hybrid polydimethylsiloxane (PDMS) nanostructured arrays. The proposed process involves monolayer self-assembly of polystyrene (PS) spheres, PDMS nanoreplication, thin film coating, and PDMS to PDMS (PDMS/PDMS) replication. A self-assembled monolayer of PS spheres is used(More)
A three-dimensional micro ceramic functionally graded material (FGM) has been fabricated by an infiltration process. The proposed technique offers an effective way to tailor the composition and microstructure of ceramic micro components. The process involves soft lithography, colloidal powder processing and the infiltration of yttria stabilized zirconia(More)
Ultra thick alumina-nickel composite micro parts were successfully fabricated using a combination of micromoulding soft lithography and colloidal powder processing of Al<inf>2</inf>O<inf>3</inf>-Ni suspension. The softlithographic method involves a deep UV lithography of SU-8, followed by the replication of Polydimethylsiloxane (PDMS), shaping the green by(More)
This paper reports a process of electrodeposition of Ni into porous alumina matrix. In the proposed process, porous alumina membrane with cross linked networks was fabricated using colloidal powder processing and pressureless sintering. The dispersion conditions of aqueous alumina nanopowder suspensions were obtained by optimizing both the pH and dispersant(More)
An experiment was conducted in the greenhouse at Assiut University (Assiut, Egypt) to study the status of manganese in both the soil and rice plants under different water and fertilizer treatments. Rice seeds were sown in pots containing a clay loam soil submerged with water for a period of 45 days after which treatments were initiated. Water treatments(More)
There is an immense research interest to utilise contact lens (CLs) as a popular platform for ocular drug delivery. However, CLs are the major predisposing factors of bacterial keratitis which is commonly caused by adhesion of microbes such as Pseudomonas aeruginosa and Staphylococcus epidermidis. The aim of the current study is to explore the effect of(More)
This paper presents a study on graphene platelet (GPL)-reinforced alumina (Al2O3) ceramic composites and the relationships between the loading of GPL and both mechanical properties and in vitro biocompatibility. Al2O3 powders with different GPL contents were prepared and sintered using a gas protected pressure-less furnace. The examination of the results(More)
Additive manufacturing technologies have been utilised in healthcare to create patient-specific implants. This study demonstrates the potential to add new implant functionality by further exploiting the design flexibility of these technologies. Selective laser melting was used to manufacture titanium-based (Ti-6Al-4V) implants containing a reservoir. Pore(More)
The fast development in materials science has resulted in the emergence of new pharmaceutical materials with superior physical and mechanical properties. Low-substituted hydroxypropyl cellulose is an ether derivative of cellulose and is praised for its multi-functionality as a binder, disintegrant, film coating agent and as a suitable material for medical(More)
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