Morphologically controlled synthesis of ionic cesium iodide colloidal nanocrystals and electron beam- induced transformations

Song, Weidong1,2; Wu, Xiaotong1; Di, Qian1; Xue, Tianjiao1; Zhu, Jichao1,2; Quan, Zewei1

2018

10.1039/c8ra02582g

RSC Advances   影响因子和分区

2046-2069

Colloidal nanocrystals (NCs) have become an important group of novel materials with applications in various fields such as lighting, medicine, and optoelectronic devices. Compared to common semiconductor NCs (e.g., CdSe, CdS, PbS) with covalent bonds and metal NCs (e.g., Au, Ag, Pt) with metallic bonds, the synthesis of colloidal NCs with ionic bonds has rarely been explored, possibly due to their high solubility in polar solvents. In this work, we demonstrate a wet chemical synthesis route to prepare ionic cesium iodide (CsI) colloidal NCs, and they can be controllably made into different morphologies with good uniformity, including nanospheres, hexagonal nanoplates and nanocubes. The degradation of CsI NCs during transmission electron microscopy (TEM) has been investigated, revealing their sensitivity to high energy electron beam irradiation. The as-prepared CsI NCs exhibit strong absorption bands peaking at 275-280 nm, which should be ascribed to the presence of F-centers inside the band gap of CsI NCs. This study provides an efficient way to achieve controllable synthesis of high-quality CsI NCs that may find promising applications as advanced nanoscintillators in medical imaging, particle physics, position emission tomography and other various fields.

SCI ; EI

英语

第一 ; 通讯

Peacock Technology Innovation Project[KQJSCX20170328155428476]

Chemistry

Chemistry, Multidisciplinary

WOS:000433428300040

ROYAL SOC CHEMISTRY

20182205250708

Cadmium sulfide ; Cesium iodide ; Covalent bonds ; Electron beams ; Energy gap ; Gold compounds ; High resolution transmission electron microscopy ; II-VI semiconductors ; IV-VI semiconductors ; Medical imaging ; Nanocrystals ; Optoelectronic devices ; Platinum compounds ; Selenium compounds ; Semiconducting lead compounds ; Semiconducting selenium compounds ; Silver compounds ; Transmission electron microscopy

Compound Semiconducting Materials:712.1.2 ; Optical Devices and Systems:741.3 ; Imaging Techniques:746 ; Nanotechnology:761 ; Physical Chemistry:801.4 ; Chemical Products Generally:804

Web of Science

1.Southern Univ Sci & Technol SUSTech, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China
2.HIT, Sch Chem & Chem Engn, Harbin 150001, Heilongjiang, Peoples R China

Song, Weidong,Wu, Xiaotong,Di, Qian,et al. Morphologically controlled synthesis of ionic cesium iodide colloidal nanocrystals and electron beam- induced transformations[J]. RSC Advances,2018,8(33):18519-18524.

Song, Weidong,Wu, Xiaotong,Di, Qian,Xue, Tianjiao,Zhu, Jichao,&Quan, Zewei.(2018).Morphologically controlled synthesis of ionic cesium iodide colloidal nanocrystals and electron beam- induced transformations.RSC Advances,8(33),18519-18524.

Song, Weidong,et al."Morphologically controlled synthesis of ionic cesium iodide colloidal nanocrystals and electron beam- induced transformations".RSC Advances 8.33(2018):18519-18524.