Exceptionally high energy density by mass, natural abundance, widespread applications, and environmental friendliness make hydrogen (H2) a front-runner among clean options. However, the transition toward renewable applications actualization of H2 economy require an efficient storage medium. Material-based is viable option, as liquefaction under pressure ultra-low temperature (-253{\deg}C) tremendously (700 atm), respectively. In this work, we highlight exceptional capabilities recently...

Abstract The electronic transport in low-dimensional materials is controlled by quantum coherence and non-equilibrium statistics. scope of the present investigation to search for origins negative-differential resistance (NDR) behavior N-doped ultra-narrow zigzag-edge ZnO nano-ribbons (ZnO-NRs). A state-of-the-art technique, based on a combination density-functional theory (DFT) Green’s function (NEGF) formalism, employed probe properties. effect location N dopant, with respect NR edges,...

Objective: Minimally invasive surgery (MIS) incorporates surgical instruments through small incisions to perform procedures. Despite the potential advantages of MIS, lack tactile sensation and haptic feedback secondary indirect contact between surgeon's hands tissues restricts sensing strength applied forces or receiving information about biomechanical properties human tissues. Accordingly, there is a crucial need for intelligent systems provide an artificial MIS surgeons trainees. This...

This research studied the effects of varied weight percentage and length ceramic wool fiber (CWF) reinforcement to fire retardant performance epoxy-based intumescent coating. Ten formulations were developed using ammonium polyphosphate (APP), expandable graphite (EG), melamine (MEL) boric acid (BA). The mixing was conducted in two stages; powdered materials grinded Rocklabs mortar grinder epoxy-mixed Caframo mixer at low speed mixing. samples applied on mild steel substrate exposed 500°C...

As an alternative to open surgery, minimally invasive surgery (MIS) utilizes small skin incisions as ports insert endoscope and surgical tools. MIS offers significant advantages, including reduced pain, shorter recovery times, better cosmetic outcomes than classical surgeries. However, procedures come at the cost of losing "sense touch," which surgeons rely on examine tissues under operation, palpate organs, assessing their conditions. This has encouraged researchers develop smart tools that...

Adsorption and gas-sensing properties of ZnO nano-ribbons (ZnO-NRs) in detecting H2 are investigated using density functional theory (DFT) combined with the non-equilibrium Green's function (NEGF) formalism. Several dopants (e.g., C, N F) have been tested versus adsorption H <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> molecule other gas molecules , O O, S). The results relaxation show occurrence chemisorption to occur only cases C-...

Density functional theory combined with the non-equilibrium Green's function formalism is used to study conductance response of Fe-doped graphene nano-ribbons (GNRs) CO2 gas adsorption. A single Fe atom either adsorbed on GNR's surface (aFe-graphene) or it substitutes carbon (sFe-graphene). Metal doping reduces electronic transmission pristine due localization states near impurity site. Moreover, aFe-graphene found be less sensitive molecule attachment as compared sFe-graphene system. These...

Bend sensors play a pivotal role in gaining insights into the dynamic behavior of flexible mechanical systems and bolstering safety considerations. This paper introduces novel microfluidic-based multi-modal bend sensor that offers tremendous potential for wide range applications, especially robotics microsystems. Our features substrate embedded with liquid metal-filled microchannel filled. The fabrication process utilizes simple cost-effective 3D printing soft-lithography techniques. As...

This study comprehensively examined the structural, electronic, electrochemical, and energy storage properties of boron-vacancy induced porous boron nitride monolayers (BN:VB) as multifunctional materials, anodes for MIBs H2 applications. Our computational approaches, density functional theory (DFT), ab initio molecular dynamics (AIMD), thermodynamic analysis, revealed exceptionally high gravimetric densities storage, respectively. We investigated interactions Li, Na, K atoms on BN:VB, which...

The Swahili poetry portrayed the German presence on east African coast in more than a poem.Such as Utenzi wa Vita vya Maji Maji, water war poem by Abdul Karim bin Jamaluddin, that spoke about exploitation of people.It explained sultan Oman and Zanzibar's opposition at time to Germans