Khalifa University

About: Khalifa University is a education organization based out in Abu Dhabi, United Arab Emirates. It is known for research contribution in the topics: Computer science & Adsorption. The organization has 3752 authors who have published 10909 publications receiving 141629 citations.

Voltage-Gated Ions Sieving through 2D MXene Ti3C2Tx Membranes

Abstract: We report a nanochanneled Ti3C2Tx MXene membrane that enables an efficient controlled rejection/permeation of inorganic ions and organic dye molecules under applied electrical potential. When a negative electrical potential (−0.6 V) is applied to the Ti3C2Tx MXene membrane under only osmotic pressure, the rejection of inorganic salt (NaCl or MgSO4) through the membrane is enhanced. In contrast, applying a positive potential inhibits the rejection through electrostatic repulsion between charged MXene layers and inorganic cations in solution. The rejection rates of Ti3C2Tx membranes are also tested in a flow-through system. MXene membranes as thin as 100 nm show a high rejection rate above 97.9 ± 1.0% for methylene blue dye molecules. Similar to inorganic salts, application of negative or positive voltages increases and decreases, respectively, the transport of molecules through Ti3C2Tx membranes. The voltage gated rejection through electronically conductive membranes is demonstrated as a promising alternat...

An overview of localization techniques for Wireless Sensor Networks

Abstract: Localization of sensor nodes is an important aspect in Wireless Sensor Networks (WSNs). This paper presents an overview of the major localization techniques for WSNs. These techniques are classified into centralized and distributed depending on where the computational effort is carried out. The paper concentrates on the factors that need to be considered when selecting a localization technique. The advantages and limitation of various techniques are also discussed. Finally, future research directions and challenges are highlighted.