石墨烯
碳化
柠檬酸
量子产额
氧化物
光致发光
材料科学
发光
纳米
量子点
纳米晶
产量(工程)
化学工程
纳米技术
荧光
光电子学
化学
复合材料
有机化学
冶金
扫描电子显微镜
光学
物理
工程类
作者
Yongqiang Dong,Jingwei Shao,Congqiang Chen,Hao Li,Ruixue Wang,Yuwu Chi,Xiaomei Lin,Guonan Chen
出处
期刊:Carbon
[Elsevier]
日期:2012-10-01
卷期号:50 (12): 4738-4743
被引量:1535
标识
DOI:10.1016/j.carbon.2012.06.002
摘要
An easy bottom–up method for the preparation of photoluminescent (PL) graphene quantum dots (GQDs) and graphene oxide (GO) has been developed by tuning the carbonization degree of citric acid and dispersing the carbonized products into alkaline solutions. The GQDs are nanosheets ∼15 nm in width, and 0.5–2.0 nm in thickness. They show a relatively strong (9.0%) PL quantum yield and an excitation-independent PL emission activity. In contrast, the GO nanostructures consist of sheets that are hundreds of nanometers in width and ∼1 nm in height. They exhibit a relatively weak (2.2%) PL quantum yield and an excitation-dependent PL emission activity.
科研通智能强力驱动
Strongly Powered by AbleSci AI