Ultra-high Quantum Yield Nitrogen-doped Carbon Quantum Dots and Their Versatile Application in Fluorescence Sensing, Bioimaging and Anti-counterfeiting

2021 ◽  
pp. 119583
Author(s):  
Anzhong Tan ◽  
Guanghui Yang ◽  
Xuejuan Wan
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Carbon Quantum Dots ◽  
High Quantum Yield ◽  
Fluorescence Sensing ◽  
Nitrogen Doped ◽  
High Quantum ◽  
Nitrogen Doped Carbon

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.

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).

Sign in / Sign up

Export Citation Format

Share Document