期刊
JOURNAL OF NANOPARTICLE RESEARCH
卷 16, 期 7, 页码 -出版社
SPRINGER
DOI: 10.1007/s11051-014-2504-1
关键词
Nanoparticle; Quantum dot; Nanomaterials; Colloids; Chitosan; Nanohybrid
资金
- CAPES
- FAPEMIG
- CNPq
Semiconductor quantum dots (QDs) are fluorescent nanocrystals with great potential for use in biomedical and environmental applications. However, eliminating the potential cytotoxicity of the QDs comprised of a core containing heavy metals and using a green chemical process are still challenges faced by the research community. Thus, the aim of this work was to develop a novel green and facile route for synthesizing biocompatible water-soluble QDs using chemically modified chitosan as a capping ligand in aqueous media, with their chemical and optical properties tuned by the nanoparticle size. The synthesis of ZnS QDs capped by carboxymethylchitosan (CMC) was performed using a single-step aqueous colloidal process at room temperature. The nanohybrids were extensively characterized by several imaging and spectroscopic techniques, and the results demonstrated that ultra-small ZnS nanocrystals were produced with average nanoparticles ranging from 3.2 to 4.2 nm. In addition, the luminescent properties of ZnS QDs were influenced by the pH during the synthesis due to the size distribution of the nanoparticles produced. Hence, new heavy metal free nanohybrids were successfully developed based on ZnS QDs directly surface-functionalized by biopolymer exhibiting fluorescent activity that may be potentially used in a large number of eco-friendly and biomedical applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据