Nitrogen donor ligand for capping ZnS quantum dots: a quantum chemical and toxicological insight

Abstract

Nanoparticles having strong optical and electronic properties are the most widely used materials in sensor development.

Time‐Dependent Growth Rates of TGA‐Capped ZnS Nanocrystals as a Synthetic Formula for Ligand‐Capped Quantum Dots

“…[ 20 ] A typical investigation of ZnS QDs capped by different anchor types (imidazole and mercaptoethenol) was reported by Pandey et al. [ 10 ] and by N. Kumbhojkar et al., [ 20 ] respectively. Although the fabrication time was much expanded after the critical value, the ZnS QD size was little increased.…”

“…[5] The optical properties of ZnS QDs can be tuned by size in the fabrication process. As a result, many researchers attempted to control their size during the synthesis DOI: 10.1002/crat.202200074 process by using different coating ligands, [6][7][8][9][10][11][12][13] varying the cationic surfactant, [14] changing the pH of the reaction solution, [15] or changing the ratio content of the Zn 2+ /S 2−[8, [16][17][18] or contents of the ligand. [19,20] So far, there is still little literature about the relationship between growth time and the average size of ligand-capped ZnS QDs.…”

Investigations on the interconnection between chemical reactions and experimental results of Zn-based quantum dots

“…Effective capping was observed in the basic medium, forming strong covalent bonds of deprotonated anionic ligand species with the zinc ions. 9 Liao et al have synthesized nanocomposites of ZnS and nitrogen-doped carbon, i.e., ZnS@NC, indicating their use in electrochemical applications, especially in lithium storage batteries. The anode material of the prepared nanocomposites shows a high reversible capacity of 800 mA h g À1 after 200 cycles at 0.1 A g À1 current value.…”

Vitamin B6 cofactor-directed fluorescent “turn-on” detection of alkaline-phosphatase activity using bovine serum albumin-functionalized Mn–ZnS quantum dots

“…15,16 Among various fluorescent nanomaterials, [17][18][19][20] semiconductor quantum dots (QDs) have been applied extensively for sensor development with potential utility for in vivo and in vitro imaging due to their extraordinary size-dependent photoluminescence. [21][22][23][24][25] However, application of semiconductor QDs in sensing and bioimaging is hampered by toxicity due to the use of heavy metals such as Cd and Pb. 26 Alternately, manganese-doped zinc sulfide quantum dots (Mn-ZnS QDs) have drawn wide attention for the design of fluorescent sensors due to their low toxicity, strong phosphorescence emission, long lifetime, and stable wide bandgap.…”