scholarly journals Recent Developments on Rare-Earth Hexaboride Nanowires

2021 ◽  
Vol 13 (24) ◽  
pp. 13970
Author(s):  
Zhen Wang ◽  
Wei Han
Keyword(s):  
Rare Earth ◽  
Chemical Vapor ◽  
Synthesis Methods ◽  
Research Directions ◽  
Preparation Methods ◽  
Samarium Hexaboride ◽  
The Past ◽  
Field Emitters ◽  
Recent Developments ◽  
Second Wave

With the rise of topological insulator samarium hexaboride (SmB6), rare-earth hexaboride (RB6) nanowires are the focus of the second wave of a research boom. Recent research has focused on new preparation methods, novel electronic properties, and extensive applications. Here, we review the recent developments in RB6 nanowires in the past five years. Two main synthesis methods (chemical vapor deposition and high-pressure solid-state) of RB6 nanowires are introduced and compared. Moreover, their electronic transport, magnetic properties, and superconducting properties are revealed. Furthermore, the applications of RB6 nanowires are presented, including as field emitters, photodetectors, and in energy storage. Finally, we detail further research directions for RB6 nanowires.

scholarly journals Preparation and Recent Developments of Ti/SnO2-Sb Electrodes

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Fangcheng Cao ◽  
Jingyi Tan ◽  
Shengping Zhang ◽  
Hongqing Wang ◽  
Caizhen Yao ◽  
...  
Keyword(s):  
Specific Conductivity ◽  
Sol Gel ◽  
Research Work ◽  
Chemical Vapor ◽  
Dip Coating ◽  
Industrial Applications ◽  
Chemical Vapor Deposition Method ◽  
Preparation Methods ◽  
As Doping ◽  
Recent Developments

Ti/SnO2-Sb electrode, which is one of the dimensionally stable anode (DSA) electrodes, offers high specific conductivity, excellent electrocatalytic performance, and great chemical stability. For these reasons, Ti/SnO2-Sb electrode has been extensively studied in the fields of wastewater treatment. This review covers essential research work about the advanced oxidation technology and related DSA electrodes. It gives an overview of preparation methods of SnO2 electrodes, including sol-gel method, dip-coating method, electrodeposition method, chemical vapor deposition method, thermal decomposition method, magnetron sputtering method, and hydrothermal method. To extend service life and improve electrocatalytic efficiency, the review provides comprehensive details about the modification technologies of Ti/SnO2-Sb electrode, such as doping modification, composite modification, and structural modification. In addition, the review discusses common problems in industrial applications of Ti/SnO2-Sb electrode and highlights the promising outlook of Ti/SnO2-Sb electrode.

scholarly journals A Review: Preparation, Performance, and Applications of Silicon Oxynitride Film

Micromachines ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 552 ◽  
Author(s):  
Yue Shi ◽  
Liang He ◽  
Fangcao Guang ◽  
Luhai Li ◽  
Zhiqing Xin ◽  
...  
Keyword(s):  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
Chemical Vapor ◽  
Silicon Oxynitride ◽  
Functional Material ◽  
Preparation Methods ◽  
Non Volatile Memory ◽  
Recent Developments ◽  
Oxynitride Film ◽  
Tunable Refractive Index

Silicon oxynitride (SiNxOy) is a highly promising functional material for its luminescence performance and tunable refractive index, which has wide applications in optical devices, non-volatile memory, barrier layer, and scratch-resistant coatings. This review presents recent developments, and discusses the preparation methods, performance, and applications of SiNxOy film. In particular, the preparation of SiNxOy film by chemical vapor deposition, physical vapor deposition, and oxynitridation is elaborated in details.

scholarly journals Recent Developments in Lanthanide-Doped Alkaline Earth Aluminate Phosphors with Enhanced and Long-Persistent Luminescence

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 723
Author(s):  
Doory Kim
Keyword(s):  
Alkaline Earth ◽  
Review Article ◽  
Lanthanide Ions ◽  
Synthesis Methods ◽  
Luminescent Materials ◽  
Persistent Luminescence ◽  
Research Attention ◽  
The Past ◽  
Recent Developments

Lanthanide-activated alkaline earth aluminate phosphors are excellent luminescent materials that are designed to overcome the limitations of conventional sulfide-based phosphors. The increasing research attention on these phosphors over the past decade has led to a drastic improvement in their phosphorescence efficiencies and resulted in a wide variety of phosphorescence colors, which can facilitate applications in various areas. This review article discusses the development of lanthanide-activated alkaline earth aluminate phosphors with a focus on the various synthesis methods, persistent luminescence mechanisms, activator and coactivator effects, and the effects of compositions. Particular attention has been devoted to alkaline earth aluminate phosphors that are extensively used, such as strontium-, calcium-, and barium-based aluminates. The role of lanthanide ions as activators and coactivators in phosphorescence emissions was also emphasized. Finally, we address recent techniques involving nanomaterial engineering that have also produced lanthanide-activated alkaline earth aluminate phosphors with long-persistent luminescence.

scholarly journals Intelligent Robots for Fruit Harvesting: Recent Developments and Future Challenges

2021 ◽  
Author(s):  
Hongyu Zhou ◽  
Xing Wang ◽  
Wesley Au ◽  
Hanwen Kang ◽  
Chao Chen
Keyword(s):  
State Of The Art ◽  
Future Research ◽  
User Requirements ◽  
Research Directions ◽  
System Architectures ◽  
The Past ◽  
Intelligent Robots ◽  
Future Challenges ◽  
Recent Developments ◽  
Growing Population

Abstract Intelligent robots for fruit harvesting have been actively developed over the past decades to bridge the increasing gap between feeding a rapidly growing population and limited labour resources. Despite significant advancements in this field, widespread use of harvesting robots in orchards is yet to be seen. To identify the challenges and formulate future research and development directions, this work reviews the state-of-the-art of intelligent fruit harvesting robots by comparing their system architectures, visual perception approaches, fruit detachment methods and system performances. The potential reasons behind the inadequate performance of existing harvesting robots are analysed and a novel map of challenges and potential research directions is created, considering both environmental factors and user requirements.

scholarly journals RECENT DEVELOPMENTS IN DYNAMICAL SYSTEMS: THREE PERSPECTIVES

2010 ◽  
Vol 20 (09) ◽  
pp. 2591-2636 ◽  
Author(s):  
F. BALIBREA ◽  
T. CARABALLO ◽  
P. E. KLOEDEN ◽  
J. VALERO
Keyword(s):  
Dynamical Systems ◽  
Open Problems ◽  
Research Directions ◽  
Present Account ◽  
The Past ◽  
Recent Developments ◽  
New Research

This paper aims to an present account of some problems considered in the past years in Dynamical Systems, new research directions and also provide some open problems.

scholarly journals Near infrared bioimaging and biosensing with semiconductor and rare-earth nanoparticles: recent developments in multifunctional nanomaterials

2021 ◽  
Author(s):  
Artiom Skripka ◽  
Diego Méndez González ◽  
Riccardo Marin ◽  
Erving Ximendes ◽  
Blanca del Rosal ◽  
...  
Keyword(s):  
Rare Earth ◽  
Near Infrared ◽  
Optically Active ◽  
Major Area ◽  
Novel Materials ◽  
The Past ◽  
Area Of Interest ◽  
Recent Developments ◽  
Active Nanoparticles ◽  
Multifunctional Nanomaterials

Research in novel materials has been extremely active over the past few decades, wherein a major area of interest has been optically active nanoparticles. These structures can overcome some of...

scholarly journals Superhydrophobic Civil Engineering Materials: A Review from Recent Developments

Coatings ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 753 ◽  
Author(s):  
Xiang ◽  
Lv ◽  
Wei ◽  
Liu ◽  
Dong ◽  
...  
Keyword(s):  
Civil Engineering ◽  
Electrochemical Etching ◽  
Chemical Vapor ◽  
Water Repellency ◽  
Superhydrophobic Surfaces ◽  
Synthesis Methods ◽  
Feature Article ◽  
Recent Developments ◽  
History Of ◽  
Engineering Materials

Superhydrophobic surfaces have drawn attention from scientists and engineers because of their extreme water repellency. More interestingly, these surfaces have also demonstrated an infinite influence on civil engineering materials. In this feature article, the history of wettability theory is described firstly. The approaches to construct hierarchical micro/nanostructures such as chemical vapor deposition (CVD), electrochemical, etching, and flame synthesis methods are introduced. Then, the advantages and limitations of each method are discussed. Furthermore, the recent progress of superhydrophobicity applied on civil engineering materials and its applications are summarized. Finally, the obstacles and prospects of superhydrophobic civil engineering materials are stated and expected. This review should be of interest to scientists and civil engineers who are interested in superhydrophobic surfaces and novel civil engineering materials.

scholarly journals Preparation and Modification of Biochar Materials and their Application in Soil Remediation

2019 ◽  
Vol 9 (7) ◽  
pp. 1365 ◽  
Author(s):  
Xue Yang ◽  
Shiqiu Zhang ◽  
Meiting Ju ◽  
Le Liu
Keyword(s):  
Soil Remediation ◽  
Poultry Manure ◽  
Future Research ◽  
Functional Material ◽  
Research Directions ◽  
Preparation Methods ◽  
The Past ◽  
Removal Of Heavy Metals ◽  
Future Research Directions ◽  
Potential Risks

As a new functional material, biochar was usually prepared from biomass and solid wastes such as agricultural and forestry waste, sludge, livestock, and poultry manure. The wide application of biochar is due to its abilities to remove pollutants, remediate contaminated soil, and reduce greenhouse gas emissions. In this paper, the influence of preparation methods, process parameters, and modification methods on the physicochemical properties of biochar were discussed, as well as the mechanisms of biochar in the remediation of soil pollution. The biochar applications in soil remediation in the past years were summarized, such as the removal of heavy metals and persistent organic pollutants (POPs), and the improvement of soil quality. Finally, the potential risks of biochar application and the future research directions were analyzed.

BROAD BUNDLES OF SINGLE-WALLED CARBON NANOTUBE SYNTHESIZED OVER Fe2O3/MgO VIA CHEMICAL VAPOR DEPOSITION OF METHANE

NANO ◽  
2009 ◽  
Vol 04 (02) ◽  
pp. 77-81 ◽  
Author(s):  
WEI-WEN LIU ◽  
AZIZAN AZIZ ◽  
SIANG-PIAO CHAI ◽  
CHING-THIAN TYE ◽  
ABDUL RAHMAN MOHAMED
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Field Effect Transistor ◽  
Chemical Vapor ◽  
Catalyst Preparation ◽  
Preparation Methods ◽  
Single Walled Carbon Nanotube ◽  
Raman Analysis ◽  
Field Emitters ◽  
Effect Transistor

SWCNTs are important materials in manufacturing advanced devices like field effect transistor and field emitters. Fe 2 O 3/ MgO catalyst was developed to grow SWCNTs and was used in chemical vapor deposition (CVD) of methane. The catalyst was prepared by mixing iron powder ( Fe 2 O 3) with MgO at the prescribed stoichiometry ratio. The findings show that SWCNTs in bundle form were grown over the catalyst. Most of the observed bundles are broad with each bundle constitutes more than 20 individual SWCNTs. Raman analysis indicates that these nanotubes possessed highly graphitized structure. Comparing with other catalyst preparation methods, this approach creates better efficiency in the synthesis and reproducibility of SWCNTs in the methane CVD.

scholarly journals Sulvanites: The Promise at the Nanoscale

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 823
Author(s):  
Roberto Prado-Rivera ◽  
Chen-Yu Chang ◽  
Mimi Liu ◽  
Cheng-Yu Lai ◽  
Daniela R. Radu
Keyword(s):  
Optoelectronic Devices ◽  
Synthesis Methods ◽  
Theoretical Studies ◽  
Printable Electronics ◽  
Solar Photovoltaics ◽  
Copper Chalcogenides ◽  
The Past ◽  
Recent Developments ◽  
Experimental And Theoretical Studies ◽  
Insight Into

The class of ternary copper chalcogenides Cu3MX4 (M = V, Nb, Ta; X = S, Se, Te), also known as the sulvanite family, has attracted attention in the past decade as featuring promising materials for optoelectronic devices, including solar photovoltaics. Experimental and theoretical studies of these semiconductors have provided much insight into their properties, both in bulk and at the nanoscale. The recent realization of sulvanites at the nanoscale opens new avenues for the compounds toward printable electronics. This review is aimed at the consideration of synthesis methods, relevant properties and the recent developments of the most important sulvanites.

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