Open AccessLarge‐scale uniform fabrication and morphology control of ultrafine perovskite nanocrystals
Author(s) -
He Zhengda,
Hao Yanan,
Bi Meihua,
Guo Limin,
Bi Ke
Publication year - 2019
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2018.5559
Subject(s) - nanocrystal , fabrication , materials science , nanomaterials , morphology (biology) , chemical engineering , nanotechnology , perovskite (structure) , crystal structure , crystallography , chemistry , medicine , alternative medicine , pathology , biology , engineering , genetics
Nanomaterials are playing more and more important roles in modern industry, while the large‐scale fabrication and dispersibility still need to be addressed. This report explores the uniform fabrication and morphology control of ultrafine BaTiO 3 (BT) nanocrystals using a ‘TEG‐sol’ method. By varying the reactant concentration, the obtained product sols, Ba/Ti ratios, structure and morphology of the nanocrystals are investigated. The results reveal that under low concentrations (0.4–0.8 mol/L), transparent sols with uniform BT nanocrystals are obtained. Increasing the concentration to higher than 1.0 mol/L, BT precipitates with abnormal large crystals are obtained. Moreover, the Ba/Ti ratio variation further reveals that the surface organics are critical to the control of crystal size and morphology. This investigation is potential to be extended to the synthesis of various perovskite nanocrystals.