scholarly journals Carbon Dots for Sensing and Killing Microorganisms

2019 ◽  
Vol 5 (2) ◽  
pp. 33 ◽  
Author(s):  
Fengming Lin ◽  
Yan-Wen Bao ◽  
Fu-Gen Wu
Keyword(s):  
Quantum Dots ◽  
Carbon Dots ◽  
Carbon Nanoparticles ◽  
Surface Passivation ◽  
Electronic Devices ◽  
Carbon Quantum Dots ◽  
Toxicity Profile ◽  
Carbon Dot ◽  
Underlying Mechanisms

Carbon dots (or carbon quantum dots) are small (less than 10 nm) and luminescent carbon nanoparticles with some form of surface passivation. As an emerging class of nanomaterials, carbon dots have found wide applications in medicine, bioimaging, sensing, electronic devices, and catalysis. In this review, we focus on the recent advancements of carbon dots for sensing and killing microorganisms, including bacteria, fungi, and viruses. Synthesis, functionalization, and a toxicity profile of these carbon dots are presented. We also discuss the underlying mechanisms of carbon dot-based sensing and killing of microorganisms.

A green synthetic route for the surface-passivation of carbon dots as an effective multifunctional fluorescent sensor for the recognition and detection of toxic metal ions from aqueous solution

2019 ◽  
Vol 11 (4) ◽  
pp. 490-506 ◽  
Author(s):  
K. Radhakrishnan ◽  
P. Panneerselvam ◽  
M. Marieeswaran
Keyword(s):  
Aqueous Solution ◽  
Quantum Dots ◽  
Carbon Dots ◽  
Surface Passivation ◽  
Fluorescent Sensor ◽  
Toxic Metal ◽  
Carbon Quantum Dots ◽  
Synthetic Route ◽  
One Pot ◽  
Hydrothermal Methods

In this work, a green synthetic route was used to create a number of surface passivated fluorescent carbon quantum dots, which are explored as promising sensing probes, via facile one-pot hydrothermal methods.

scholarly journals On the Myth of “Red/Near-IR Carbon Quantum Dots” from Thermal Processing of Specific Colorless Organic Precursors

2021 ◽  
Author(s):  
Weixiong Liang ◽  
Ping Wang ◽  
Mohammed Meziani ◽  
Lin Ge ◽  
Liju Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Thermal Processing ◽  
Carbon Nanoparticles ◽  
Organic Molecules ◽  
Surface Passivation ◽  
Carbon Quantum Dots ◽  
Effective Surface ◽  
Chemical Functionalization ◽  
Near Ir ◽  
Organic Precursors

Carbon dots were originally found and reported as surface-passivated small carbon nanoparticles, where the effective surface passivation was the chemical functionalization of the carbon nanoparticles with organic molecules. Understandably, the...

scholarly journals Evaluation of Commercial “Carbon Quantum Dots” Sample on Origins of Red Absorption and Emission Features

2019 ◽  
Vol 5 (4) ◽  
pp. 70 ◽  
Author(s):  
Liang ◽  
Ge ◽  
Hou ◽  
Ren ◽  
Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Dots ◽  
Carbon Nanoparticles ◽  
Fluorescence Emission ◽  
Carbon Quantum Dots ◽  
Research Field ◽  
One Pot ◽  
Commercial Sample ◽  
Carbon Particles ◽  
Negative Impacts

The commercially acquired aqueous solution of “carbon quantum dots” sample was evaluated by optical absorption and fluorescence emission methods; in reference to aqueous dispersed small carbon nanoparticles and representative carbon dots prepared from chemical functionalization of the carbon nanoparticles. The results suggest a very low content of carbon that is associated with nanoscale carbon particles/domains in the as-supplied sample; and likely significant contamination by dye-like species/mixtures. In the absence of any information on the synthesis and history of the commercial sample, the possible cause of the contamination was illustrated by an example on similar dye formation in the one-pot carbonization synthesis of “red carbon dots” from citric acid–formamide precursor mixtures under too mild processing conditions that were insufficient for the intended carbonization. The negative impacts to the carbon dots research field by the apparent proliferation and now commercial availability of carbon-deficient or even largely carbon-less “carbon quantum dots”, which are more susceptible to dye contamination or dominance, are discussed.

scholarly journals Role of alkan-1-ol solvents in the synthesis of yellow luminescent carbon quantum dots (CQDs): van der Waals force-caused aggregation and agglomeration

RSC Advances ◽  
2020 ◽  
Vol 10 (24) ◽  
pp. 14396-14402 ◽  
Author(s):  
Kenta Hagiwara ◽  
Hiroshi Uchida ◽  
Yumiko Suzuki ◽  
Takashi Hayashita ◽  
Kanjiro Torigoe ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Nanoparticles ◽  
Van Der Waals ◽  
Carbon Quantum Dots ◽  
Van Der Waals Force

Carbon quantum dots (CQDs; luminescent carbon nanoparticles, size < 10 nm) have attracted much attention with respect to their eco-friendliness and multi-functionality.

An “on–off–on” fluorescent nanoprobe for recognition of Cu2+ and GSH based on nitrogen co-doped carbon quantum dots, and its logic gate operation

2019 ◽  
Vol 11 (20) ◽  
pp. 2650-2657 ◽  
Author(s):  
Yifang Gao ◽  
Huilin Zhang ◽  
Shaomin Shuang ◽  
Hui Han ◽  
Chuan Dong
Keyword(s):  
Quantum Dots ◽  
Carbon Dots ◽  
Logic Gate ◽  
Carbon Quantum Dots ◽  
Gate Operation ◽  
Fluorescent Nanoprobe ◽  
Highly Sensitive ◽  
Doped Carbon Dots ◽  
Co Doped

Novel nitrogen co-doped carbon dots (NCDs) were synthesized as a fluorescent “on–off–on” switch for the highly sensitive and selective sensing of Cu2+ and glutathione (GSH) by a straightforward pyrolysis route.

Implications of surface passivation on physicochemical and bioimaging properties of carbon dots

RSC Advances ◽  
2014 ◽  
Vol 4 (40) ◽  
pp. 20915-20921 ◽  
Author(s):  
Abhay Sachdev ◽  
Ishita Matai ◽  
P. Gopinath
Keyword(s):  
Quantum Dots ◽  
Carbon Dots ◽  
Surface Passivation ◽  
Fluorescence Properties ◽  
Promising Alternative

The prevalence of surface functionalized carbon dots (CDs) with intriguing fluorescence properties has given a new dimension to the field of bioimaging and is perceived as a promising alternative to quantum dots (QDs).

Functionalization of Carbon Nanoparticles and Defunctionalization—Toward Structural and Mechanistic Elucidation of Carbon “Quantum” Dots

2016 ◽  
Vol 120 (44) ◽  
pp. 25604-25611 ◽  
Author(s):  
Fan Yang ◽  
Gregory E. LeCroy ◽  
Ping Wang ◽  
Weixiong Liang ◽  
Jijie Chen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Nanoparticles ◽  
Carbon Quantum Dots

Carbon quantum dots and carbon layer double protected cuprous oxide for efficient visible light CO2 reduction

2019 ◽  
Vol 55 (30) ◽  
pp. 4419-4422 ◽  
Author(s):  
Haitao Li ◽  
Yadan Deng ◽  
Youdi Liu ◽  
Xin Zeng ◽  
Dianne Wiley ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Visible Light ◽  
Cuprous Oxide ◽  
Carbon Dots ◽  
Co2 Reduction ◽  
Carbon Quantum Dots ◽  
Carbon Layer ◽  
Excellent Performance

We designed a photocatalyst of carbon dots and carbon layer double-protected Cu2O which exhibited excellent performance in CO2 conversion.

scholarly journals Antiviral Carbon Dots: High Amplification of the Antiviral Activity of Curcumin through Transformation into Carbon Quantum Dots (Small 41/2019)

Small ◽  
2019 ◽  
Vol 15 (41) ◽  
pp. 1970219
Author(s):  
Chin‐Jung Lin ◽  
Lung Chang ◽  
Han‐Wei Chu ◽  
Han‐Jia Lin ◽  
Pei‐Ching Chang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Antiviral Activity ◽  
Carbon Dots ◽  
Carbon Quantum Dots
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