Abstract
Boron nitride quantum dots (BNQDs) have gained increasing attention for their versatile fluorescent, optoelectronic, chemical, and biochemical properties. During the past few years, significant progress has been demonstrated, started from theoretical modeling to actual application. Many interesting properties and applications have been reported, such as excitation-dependent emission (and, in some cases, non-excitation dependent), chemical functionalization, bioimaging, phototherapy, photocatalysis, chemical, and biological sensing. An overview of this early-stage research development of BNQDs is presented in this article. We have prepared un-bias assessments on various synthesis methods, property analysis, and applications of BNQDs here, and provided our perspective on the development of these emerging nanomaterials for years to come.
Highlights
These results suggest that the sizes, quantum yields (QYs), and optical properties of these Boron nitride quantum dots (BNQDs) were dependent on the polarity of different organic solvents
The authors have explored the use of other amino acids for the synthesis of BNQDs. All these BNQDs exhibit strong blue fluorescence but their UV-Vis absorption peaks and PL emission spectra are varying. These results suggest the role of different surface states were formed on BNQDs, which are corresponding to varying optical and spectroscopic properties
All the publications so far have shown that the synthetic route is simple and cost-efficient; more creativity to scale-up the production efficiency is needed for the large-scale and real-world application of BNQDs
Summary
Low dimensional boron nitride (BN) materials such as BN nanosheets and BN nanotubes (BNNTs) have gained substantial attention [1,2,3,4,5,6,7,8,9]. The three-dimensional (3D) cubic phase (c-BN), two-dimensional (2D) hexagonal phase (h-BN), and one-dimensional (1D) BN nanotubes (BNNTs) are structurally like diamonds, graphene, and carbon nanotubes (CNTs), respectively Despite these structural similarities, BN materials offer different physical and chemical properties. Strong boron–nitrogen cointeraction due to the electronegativity difference between the boron and nitrogen atoms valent intralayer bonds making hexagonal planar geometry and weak van der Waals inbetweenbetween adjacentlayers layersin[32]. Bond, The the electrons in the move towards the electronegative sequence which is different when compared with graphite in which hexagonal nanosheets atoms vacating the boron atoms and provide a partial ionic character through polarization in the ABAB w-BN has a diamond-like tetrahedral structure.
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