One-step preparation of nitrogen-doped and surface-passivated carbon quantum dots with high quantum yield and excellent optical properties

RSC Advances ◽  
2014 ◽  
Vol 4 (15) ◽  
pp. 7648 ◽  
Author(s):  
Jing Liu ◽  
Xinling Liu ◽  
Hongjie Luo ◽  
Yanfeng Gao
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Quantum Yield ◽  
Carbon Quantum Dots ◽  
High Quantum Yield ◽  
Nitrogen Doped ◽  
High Quantum ◽  
One Step

High quantum yield blue- and orange-emitting carbon dots: one-step microwave synthesis and applications as fluorescent films and in fingerprint and cellular imaging

The Analyst ◽  
2019 ◽  
Vol 144 (15) ◽  
pp. 4569-4574 ◽  
Author(s):  
Zhiqin Deng ◽  
Chang Liu ◽  
Yanzi Jin ◽  
Jianlin Pu ◽  
Bin Wang ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Microwave Synthesis ◽  
Carbon Dots ◽  
Cellular Imaging ◽  
High Quantum Yield ◽  
Nitrogen Doped ◽  
High Quantum ◽  
One Step

Nitrogen-doped CDs with high quantum yield have been synthesized by one-step microwave synthesis and successfully used for films and bioimaging.

scholarly journals Synthesis of N-Doped Micropore Carbon Quantum Dots with High Quantum Yield and Dual-Wavelength Photoluminescence Emission from Biomass for Cellular Imaging

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 495 ◽  
Author(s):  
Xin Ren ◽  
Fang Zhang ◽  
Bingpeng Guo ◽  
Na Gao ◽  
Xiaoling Zhang
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Cost Effective ◽  
Carbon Quantum Dots ◽  
Dual Wavelength ◽  
High Quantum Yield ◽  
High Quantum ◽  
Laser Ablation Method ◽  
Cost Effective Method ◽  
Pl Emission

Pursuit of a simple, fast, and cost-effective method to prepare highly and dual-wavelength fluorescent carbon quantum dots (CQDs) is a persistent objective in recent years. Here, we fabricated N-doped micropore carbon quantum dots (NM-CQDs) with a high quantum yield and dual-wavelength photoluminescence (PL) emission from sustainable biomass using a pulsed laser ablation method. Interestingly, two coexisting indigo–blue photoluminescence (PL) emissions were clearly observed, elucidating that the excited electrons transited from the intrinsic π* orbital to the surface state (SS) formed from the saturation passivation. The quantum yield (QY) and fluorescence lifetime (FL) of the obtained NM-CQDs were as high as 32.4% and 6.56 ns. Further investigations indicated that the emission behaviors of NM-CQDs were still stable and independent in various conditions such as various excitation wavelengths, salt ionic concentrations, pH values, irradiation times, and temperatures. The obtained NM-CQDs are very suitable for cellular staining images due to strong and stable PL emission and show good internalization in different cells. Therefore, we propose a new and cost-effective preparation strategy for highly fluorescent NM-CQDs with great potential in biomedical imaging and engineering.

One-step ultrasonic synthesis of graphene quantum dots with high quantum yield and their application in sensing alkaline phosphatase

2015 ◽  
Vol 51 (5) ◽  
pp. 948-951 ◽  
Author(s):  
Yanhong Zhu ◽  
Guangfeng Wang ◽  
Hong Jiang ◽  
Ling Chen ◽  
Xiaojun Zhang
Keyword(s):  
Quantum Dots ◽  
Alkaline Phosphatase ◽  
Graphene Oxide ◽  
Quantum Yield ◽  
Graphene Quantum Dots ◽  
Label Free ◽  
High Quantum Yield ◽  
Ultrasonic Synthesis ◽  
High Quantum ◽  
One Step

With only graphene oxide and KMnO4, the luminescent graphene quantum dots (GQDs) in high quantum yield were prepared by one-step synthesis using ultrasonication, and applied in the label-free, simple and fast fluorescence assay of alkaline phosphatase (ALP).

scholarly journals One-step fabrication of high quantum yield sulfur- and nitrogen-doped carbon dots for sensitive and selective detection of Cr(vi)

RSC Advances ◽  
2016 ◽  
Vol 6 (109) ◽  
pp. 107717-107722 ◽  
Author(s):  
Saihua Wang ◽  
Hongyun Niu ◽  
Sijing He ◽  
Yaqi Cai
Keyword(s):  
Quantum Yield ◽  
Carbon Dots ◽  
Fluorescent Sensor ◽  
Selective Detection ◽  
High Quantum Yield ◽  
Nitrogen Doped ◽  
High Quantum ◽  
One Step ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

Easily synthesized high quantum yield sulfur- and nitrogen-doped carbon dots can serve as a very efficient fluorescent sensor for the detection of Cr(vi).

Preparation of graphene quantum dots with high quantum yield by a facile one-step method and applications for cell imaging

2020 ◽  
Vol 271 ◽  
pp. 127806 ◽  
Author(s):  
Jie Su ◽  
Xin Zhang ◽  
Xiaolei Tong ◽  
Xueyuan Wang ◽  
Panxing Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Cell Imaging ◽  
Graphene Quantum Dots ◽  
High Quantum Yield ◽  
Step Method ◽  
High Quantum ◽  
One Step
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