Abstract

This chapter aims to show significant progress that our group has been developing and the applications of several doped semiconductor nanocrystals (NCs), as nanopowders or embedded in glass systems. Depending on the type of dopant incorporated in the nanocrystals, the physical, chemical, and biological properties can be intensified. However, it can also generate undesired toxic effects that can potentially compromise its use. Here we present the potential of zinc oxide NCs doped with silver (Ag), gold (Au), and magnesium (Mg) ions to control bacterial diseases in agriculture. We have also performed biocompatibility analysis of the pure and Ag-doped sodium titanate (Na2Ti3O7) NCs in Drosophila. The doped nanocrystals embedded in glassy systems are chrome (Cr) or copper (Cu) in ZnTe and Bi2Te3 NCs for spintronic development nanodevices. Therefore, we will show several advantages that doped nanocrystals may present in the technological and biotechnological areas.

Highlights

  • The development of new nanocrystals made from the doping of ions in semiconductors creates interesting physical–chemical properties and biological effects

  • The nanopowders are aiming at agricultural applications, and doped nanocrystals embedded in the glass system can be used in spintronics applications

  • Bacterial diseases of plants occur in every place that is reasonably moist or warm, and they affect all kinds of plants

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Summary

Introduction

The development of new nanocrystals made from the doping of ions in semiconductors creates interesting physical–chemical properties and biological effects. Several mutant lines for a broad range of human diseases are available in this model, besides its low cost and easy maintenance in the laboratory, in addition to a short life cycle, when compared to other model organisms such as fishes and mammals Taken together, these characteristics make Drosophila a valuable model for studies that evaluate long-term and developmental effects in nanotoxicology [15]. Cr and Cu-doped NCs simultaneously exhibit semiconductor and magnetic properties that may allow more diverse technological applications than undoped semiconductors [19, 20] In this context, we present a very effective method for the growth of Cr2+ and Cu2+ ions-doped ZnTe NCs in a glass system (65P2O5 · 14ZnO · 1Al2O3 · 10BaO · 10PbO (mol %), named PZABP) using the fusion nucleation method, as descriptions in Refs. In this chapter, we show doped nanocrystals’ results in powdered or embedded glass systems aiming at several applications

Nanocrystals in powder or embedded in glass systems
Synthesis of Cr or Cu-doped ZnTe nanocrystals embedded in glass matrix
Synthesis of Cr-doped Bi2Te3 nanocrystals embedded in glass matrix
Nanocrystals for the control plant bacterial disease
In vivo biocompatibility analysis in Drosophila melanogaster
Nanocrystals in powder
Nanocrystals application in agriculture to control bacterial diseases
Biocompatibility In Vivo of nanocrystals
Findings
Conclusion
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