Carbon dots for epoxy curing: Anti-forgery patterns with long-term luminescent stability

2021 ◽  
Vol 405 ◽  
pp. 126988
Author(s):  
Unhan Lee ◽  
Eunseo Heo ◽  
Thanh-Hai Le ◽  
Haney Lee ◽  
Semin Kim ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Epoxy Curing

Intrinsic lysosomal targeting fluorescent carbon dots with ultrastability for long-term lysosome imaging

2020 ◽  
Vol 8 (4) ◽  
pp. 736-742 ◽  
Author(s):  
Shuo Guo ◽  
Yuanqiang Sun ◽  
Xin Geng ◽  
Ran Yang ◽  
Lehui Xiao ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Living Cells ◽  
Apoptotic Cells ◽  
Drug Induced ◽  
Lysosomal Targeting ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Intrinsic lysosomal targeting carbon dots were synthesized with ultrastability for long-term lysosome imaging of living cells and drug-induced apoptotic cells.

scholarly journals The Recognition of Sweat Latent Fingerprints with Green-Emitting Carbon Dots

Nanomaterials ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 612 ◽  
Author(s):  
Dan Zhao ◽  
Wenting Ma ◽  
Xincai Xiao
Keyword(s):  
Carbon Dots ◽  
Development Process ◽  
Three Dimensional ◽  
Latent Fingerprints ◽  
Fingerprint Image ◽  
Environment Friendly ◽  
Criminal Investigations ◽  
Impacting Factors ◽  
Long Term Preservation

The recognition of fingerprints has played an extremely important role in criminal investigations, due to its uniqueness. This paper reports on the recognition of sweat latent fingerprints using green-emitting, environment-friendly carbon dots prepared with DL-malic acid and ethylenediamine, and the exploration of impacting factors in the development process of fingerprints. The experiments showed that better fingerprint images could be obtained when the latent fingerprints are developed in green-emitting carbon dots with pH 9 for 30 min, at room temperature. The reported method was also effective for latent fingerprints on a variety of substrates, as well as for those water-immersed ones, where the developed fingerprint remained stable after long-term preservation. Furthermore, the fluorescent three-dimensional fingerprint image could provide direct and simple evidence on pressing habits. The objective of this paper was to present this method. The method may help to narrow the range of suspects during criminal investigations and in forensic science.

scholarly journals Carbon Dots: Retrosynthesis of Tunable Fluorescent Carbon Dots for Precise Long‐Term Mitochondrial Tracking (Small 48/2019)

Small ◽  
2019 ◽  
Vol 15 (48) ◽  
pp. 1970259 ◽  
Author(s):  
Xin Geng ◽  
Yuanqiang Sun ◽  
Zhaohui Li ◽  
Ran Yang ◽  
Yanmin Zhao ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Retrosynthesis of Tunable Fluorescent Carbon Dots for Precise Long‐Term Mitochondrial Tracking

Small ◽  
2019 ◽  
Vol 15 (48) ◽  
pp. 1901517 ◽  
Author(s):  
Xin Geng ◽  
Yuanqiang Sun ◽  
Zhaohui Li ◽  
Ran Yang ◽  
Yanmin Zhao ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

scholarly journals Assembly of Carbon Dots into Frameworks with Enhanced Stability and Antibacterial Activity

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Pengfei Zhuang ◽  
Kuo Li ◽  
Daoyong Li ◽  
Haixia Qiao ◽  
Yifeng E ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Carbon Dots ◽  
Inhibitory Concentration ◽  
Hydrothermal Process ◽  
Active Surface ◽  
Practical Applications ◽  
E Coli ◽  
Antibacterial Performance ◽  
The Stability

AbstractCarbon dots (CDs) have been widely used as antimicrobials due to their active surface, but some CDs suffer instability. Therefore, the relative applications such as the antibacterial activity may not be reliable for long-term use. Herein, we synthesize CDs with blue fluorescence by a hydrothermal process. Thereafter, polyethylenimine was applied for the assembly of CDs into CDs-based frameworks (CDFs). The CDFs exhibited quenched fluorescence but showed more stable properties based on the scanning electron microscope and zeta potential investigations. Both CDs and CDFs show antibacterial activity toward Gram-negative Escherichia coli (E. coli) and Gram-positive Staphylococcus aureus (S. aureus), but CDFs exhibited better antibacterial performance, and S. aureus could be completely inhibited with the minimum inhibitory concentration of 30 μg/mL. This reveals CDFs magnify both the stability and antibacterial activity, which would be more promising for practical applications. Graphic abstract

scholarly journals Long-term effects of impurities on the particle size and optical emission of carbon dots

2021 ◽  
Vol 3 (1) ◽  
pp. 182-189
Author(s):  
Nasir Javed ◽  
Deirdre M. O'Carroll
Keyword(s):  
Particle Size ◽  
Carbon Dots ◽  
Surface States ◽  
Optical Emission ◽  
Long Term Effects ◽  
Solvent Environment

A significant increase in the size of CDs with time after synthesis is reported. Their luminescence also gradually decreases with time. The emission from purified CDs originates from surface states that strongly depend on solvent environment.

scholarly journals Carbon Nanotubes, Graphene, and Carbon Dots as Electrochemical Biosensing Composites

Molecules ◽  
2021 ◽  
Vol 26 (21) ◽  
pp. 6674
Author(s):  
Raja Ram Pandey ◽  
Charles C. Chusuei
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Carbon Dots ◽  
Carbon Nanomaterials ◽  
Electrochemical Sensing ◽  
Design Elements ◽  
Electrochemical Biosensing ◽  
Active Nanoparticles ◽  
Carry Over

Carbon nanomaterials (CNMs) have been extensively used as electrochemical sensing composites due to their interesting chemical, electronic, and mechanical properties giving rise to increased performance. Due to these materials’ unknown long-term ecological fate, care must be given to make their use tractable. In this review, the design and use of carbon nanotubes (CNTs), graphene, and carbon dots (CDs) as electrochemical sensing electrocatalysts applied to the working electrode surface are surveyed for various biosensing applications. Graphene and CDs are readily biodegradable as compared to CNTs. Design elements for CNTs that carry over to graphene and CDs include Coulombic attraction of components and using O or N atoms that serve as tethering points for attaching electrocatalytically active nanoparticles (NPs) and/or other additives.

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