scholarly journals Transition Metals Doped Nanocrystals: Synthesis, Characterization, and Applications

2021 ◽  
Author(s):  
Anielle C.A. Silva ◽  
Jerusa M. de Oliveira ◽  
Luciana R.S. Floresta ◽  
Matheus V. da Silva ◽  
José L. da S. Duarte ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Transition Metals ◽  
Crystalline Structure ◽  
Strong Interaction ◽  
Charge Carriers ◽  
Cdte Quantum Dots ◽  
Doped Zno ◽  
Unpaired Electrons ◽  
Glass Matrices

Doping is a technique that makes it possible to incorporate substitutional ions into the crystalline structure of materials, generating exciting properties. This book chapter will comment on the transition metals (TM) doped nanocrystals (NCs) and how doping and concentration influence applications and biocompatibility. In the NCs doped with TM, there is a strong interaction of sp-d exchange between the NCs’ charge carriers and the unpaired electrons of the MT, generating new and exciting properties. These doped NCs can be nanopowders or be embedded in glass matrices, depending on the application of interest. Therefore, we show the group results of synthesis, characterization, and applications of iron or copper-doped ZnO nanopowders and chromium-doped Bi2S3, nickel-doped ZnTe, and manganese-doped CdTe quantum dots in the glass matrices.

Degenerated ZnO Nanocrystals: Synthesis, Properties and Applications

2021 ◽  
Author(s):  
◽  
Anzelms Zukuls
Keyword(s):  
Magnetic Properties ◽  
Transition Metals ◽  
Solvothermal Synthesis ◽  
Semiconductor Nanocrystals ◽  
Synthesis Method ◽  
Charge Carriers ◽  
Synthesis Methods ◽  
Free Charge ◽  
Zno Nanocrystals ◽  
Doped Zno

The Ph. D. thesis focuses on the solvothermal synthesis of degenerate Ga3+ doped ZnO semiconductor nanocrystals and the study of the crystalline structure, electronic structure and morphology, as well as optical and magnetic properties of the obtained materials. The experimental part investigates ways to achieve a higher degree of doping and the concentration of free charge carriers, as well as their effect on localized surface plasmon resonance-induced light absorption in the infrared part or the light spectrum or transition metals (Fe3+, Ni2+, Mn2+) doped ZnO magnetization nature. Literature review summarises information through the period from 1954 to 2020, using the latest literature, which is available in internet databases. The review provides information on various nanocrystal synthesis methods used to form zinc oxide nanocrystals. Degenerate semiconductor metal oxides, their optical properties, as well as diluted magnetic oxide semiconductor nanocrystals are considered. The results describe various doped ZnO nanocrystal products that are synthesised by the solvothermal synthesis method and their optical, morphological and physical properties. The results of the research show the possibility to adjust the amount of gallium introduced into ZnO nanocrystals by controlling solvents and additives. The magnetic properties of ZnO nanocrystals co-doped with transition metals and gallium change depending on the amount of gallium introduced; by photodoping Ga-doped ZnO nanocrystals, it is possible to change the concentration of their free charge carriers.

The Crystalline Structure, Optical and Conductivity Properties of Fluorine Doped ZnO Nanoparticles

2019 ◽  
Vol 11 (3) ◽  
pp. 03002-1-03002-5 ◽  
Author(s):  
A. Diha ◽  
◽  
S. Benramache ◽  
L. Fellah ◽  
◽  
...  
Keyword(s):  
Crystalline Structure ◽  
Zno Nanoparticles ◽  
Doped Zno

Fluorescenсе Properties of Complexes of Coumarin Derivatives/CdTe Quantum Dots under Interaction with Ammonia Molecules in Microconcentrations

2016 ◽  
Vol 8 (4(1)) ◽  
pp. 04032-1-04032-5
Author(s):  
V. P. Mitsai ◽  
◽  
A. G. Misyura ◽  
S. V. Kryvets ◽  
Ya. P. Lazorenko ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Cdte Quantum Dots ◽  
Coumarin Derivatives

Electrostatic repulsion strategy for highly selective and sensitive “switch–on” fluorescence sensor of ascorbic acid based on the cysteamine-coated CdTe quantum dots and cerium (IV)

2021 ◽  
Author(s):  
Yifei Guo ◽  
Jingjing Du ◽  
Jianjun Li ◽  
Ran Yang ◽  
Peter B. de Harrington ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ascorbic Acid ◽  
Hydrothermal Method ◽  
Cadmium Chloride ◽  
Fluorescence Sensor ◽  
Cdte Quantum Dots ◽  
Electrostatic Repulsion ◽  
Functional Monomer ◽  
Simple Hydrothermal Method ◽  
Cdte Qds

In this work, cysteamine-coated CdTe quantum dots (CA-CdTe QDs) were synthesized by a simple hydrothermal method employing cadmium chloride as the cadmium source and cysteamine hydrochloride as the functional monomer....

A simple paper-based approach for arsenic determination in water using hydride generation coupled with mercaptosuccinic-acid capped CdTe quantum dots

2020 ◽  
Vol 12 (21) ◽  
pp. 2718-2726
Author(s):  
Oraphan Thepmanee ◽  
Kanlaya Prapainop ◽  
Obnithi Noppha ◽  
Nuanlaor Rattanawimanwong ◽  
Weena Siangproh ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Hydride Generation ◽  
Cdte Quantum Dots ◽  
Mercaptosuccinic Acid ◽  
Cdte Qds ◽  
Arsenic Detection ◽  
Detection Probe ◽  
Arsenic Determination

Paper-based device with MSA-CdTe QDs as arsenic detection probe is presented.

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