Topic Review
ZnO Nanowires Cold Cathode
A cold cathode has many applications in high frequency and high power electronic devices, X-ray source, vacuum microelectronic devices and vacuum nanoelectronic devices. After decades of exploration on the cold cathode materials, ZnO nanowire has been regarded as one of the most promising candidates, in particular for large area field emitter arrays (FEAs). Numerous works on the fundamental field emission properties of ZnO nanowire, as well as demonstrations of varieties of large area vacuum microelectronic applications, have been reported. Moreover, techniques such as modifying the geometrical structure, surface decoration and element doping were also proposed for optimizing the field emissions.
  • 468
  • 06 Sep 2021
Topic Review
ZnO Binary and Ternary Composites
ZnO is a promising anode candidate for LIBs owing to its high theoretical capacity (978 mAh g−1). However, because of its limitations, such as its slow chemical reaction kinetics, rapid capacity fading, and poor rate capability, composites of ZnO must be formed with other materials. The highlighted studies on ZnO-based binary and ternary composites as anode for LIBs with different synthesis methods are summarized.
  • 573
  • 16 Aug 2021
Topic Review
ZnO and TiO2 Green Synthesis
Over the last two decades, oxide nanostructures have been continuously evaluated and used in many technological applications. The advancement of the controlled synthesis approach to design desired morphology is a fundamental key to the discipline of material science and nanotechnology. These nanostructures can be prepared via different physical and chemical methods; however, a green synthesis approach is a promising way to produce these nanostructures with desired properties with time and energy savings and/or less use of hazardous chemicals. In this regard, ZnO and TiO2 nanostructures are prominent candidates for various applications given their thermal stability, non-toxicity and cost-effective. 
  • 1.7K
  • 06 May 2021
Topic Review
Zn(II) Hydrazone Complexes
Compound Name: (E)-N,N,N-trimethyl-2-oxo-2-(2-(1-(thiazol-2-yl)ethylidene)hydrazinyl)ethan-1-aminium di(thiocyanato-κN) zink(II) dihydrate.
  • 833
  • 29 Dec 2020
Topic Review
Zn(II) AIEgens: “Clip Approach”
 Aggregation-induced emission (AIE) compounds display a photophysical phenomenon inwhich the aggregate state exhibits stronger emission than the isolated units. The common term of“AIEgens” was coined to describe compounds undergoing the AIE effect. Due to the recent interestin AIEgens, the search for novel hybrid organic–inorganic compounds with unique luminescenceproperties in the aggregate phase is a relevant goal. In this perspective, the abundant, inexpensive,and nontoxic d10 zinc cation offers unique opportunities for building AIE active fluorophores, sensingprobes, and bioimaging tools. Considering the novelty of the topic, relevant examples collected inthe last 5 years (2016–2021) through scientific production can be considered fully representative ofthe state-of-the-art. Starting from the simple phenomenological approach and considering differenttypological and chemical units and structures, we focused on zinc-based AIEgens offering syntheticnovelty, research completeness, and relevant applications. A special section was devoted to Zn(II)-based AIEgens for living cell imaging as the novel technological frontier in biology and medicine.
  • 560
  • 22 Jul 2021
Topic Review
Zn-Pb Metallurgical Slags as Source of Metal Recovery
The mineralogical and chemical characteristics of zinc and lead smelting slags are presented, with particular reference to the slags formed during the simultaneous production of Zn and Pb by the Imperial Smelting Process. These slags, because of the presence of many metals in their composition, mainly in the form of crystalline phases, are a valuable source for their extraction. Slags from Zn-Pb metallurgy are processed on an industrial scale using pyrometallurgical and hydrometallurgical methods, alongside which a number of experiments conducted to recover metals as efficiently as possible, including bioleaching experiments.
  • 108
  • 03 Jan 2024
Topic Review
Zirconolite and Murataite for the Immobilization of Actinides
Zirconolite is highly stable in nature, with isotope systems that have been closed for hundreds of million years, making it possible for age determination. Murataite is a very rare mineral, its synthetic counerpart was first discovered in the Synroc matrix from defense waste obtained by sintering. Synthetic zirconolie and murataite can be applied for nuclear waste immobilization. 
  • 862
  • 14 Sep 2022
Topic Review
Zirconium Carbide for Hypersonic Applications
At ultra-high temperatures, resilient, durable, stable material choices are limited. While Carbon/Carbon (C/C) composites (carbon fibers and carbon matrix phases) are the materials of choice, zirconium carbide (ZrC) provides an option in hypersonic environments and specifically in wing leading edge (WLE) applications. 
  • 178
  • 08 Oct 2023
Topic Review
Zirconium and Titanium Phosphates
Zirconium and titanium phosphates are a group of laminar tetravalent metal phosphates that have attracted intensive investigation interests. Unlike zirconium phosphates, titanium phosphates can be also synthesized in another morphology, exhibiting the form of nanorods, and thus are known as nanofibrous titanium phosphates.  The different synthetic routes of zirconium and titanium phosphates and their current and prospective applications with a special mention to the their plausible applications in the field of biotechnology are discussed. 
  • 788
  • 25 Mar 2022
Topic Review
Zirconia-Based Ceramics Reinforced by Carbon Nanotubes
The use of CNTs (carbon nanotubes) as a secondary phase in a zirconia matrix is motivated by their outstanding crack self-healing ability, the possibility to tailor the desired nano-structural properties, and their exceptional wear behavior. Therefore, a detailed investigation into CNT features has been provided. The debate of using the different Vickers indentation fracture toughness equations to estimate the resistance of crack propagation was critically reviewed according to crack characteristics.
  • 190
  • 16 Aug 2023
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