One-step synthesis of strongly confined, defect-free and hydroxy-terminated ZnO quantum dots

被引：19
作者：
Jain, Gunisha [1 ]
Rocks, Conor [1 ]
Maguire, Paul [1 ]
Mariotti, Davide [1 ]
机构：
[1] Ulster Univ, Nanotechnol & Integrated Bioengn Ctr, Newtownabbey, North Ireland
来源：
NANOTECHNOLOGY | 2020年 / 31卷 / 21期
基金：
英国工程与自然科学研究理事会;
关键词：
hydroxy-terminated ZnO quantum dots; quantum confinement; band alignment; photoluminescence; defect-free; LIGHT; SURFACE; PHOTOLUMINESCENCE; EMISSION; WATER; SIZE; NANOPARTICLES; ABSORPTION; ORIGIN; SHIFT;
D O I：
10.1088/1361-6528/ab72b5
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
This paper reports the production of strongly confined ligand-free, defect-free, hydroxy-terminated ZnO quantum dots with a mean diameter of 1.9 nm, by radio frequency atmospheric pressure microplasma. Systematic characterization is performed to understand the surface chemistry of ZnO quantum dots. Photoluminescence studies show strong confinement effect on emission with only ultraviolet (UV) emission without any defect-related visible emission. Emission is again tested after eighteen months and confirms the QDs long-term emission stability. The mechanism responsible for this UV emission is also discussed and originates from OH-related surface terminations.
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页数：9
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