White-emitting carbon dots with long alkyl-chain structure: Effective inhibition of aggregation caused quenching effect for label-free imaging of latent fingerprint

Jiang, Bang‐Ping; Yu, Yun-Xiang; Guo, Xiaolu; Ding, Zhaoyang; Zhou, Bo; Liang, Hong; Shen, Xing‐Can

doi:10.1016/j.carbon.2017.11.070

Cited by 117 publications

(57 citation statements)

References 67 publications

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“…The difference in electron time decay corresponds to different electron-hole recombination mechanism (Zhang et al, 2013). Electron time decay measurement are used to determine the PL properties that show several energy levels (Jiang et al, 2018). Electron time decay measurement are carried out under the excitation pulse and decay is recorded after the excitation pulse finished (Kozák et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

Photoluminescence Properties of Poly (Ethylene Glycol) Passivated Carbon Dots from Cassava Peels

Putro

Roza

Isnaeni³

2019

indonesian.j.of.science.and.education

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Carbon dots (C-dots) is a new type of luminescense nanoparticles that can be synthesized easily from natural sources, such as cassava peels. C-dots has been synthesized from cassava peels based green synthesis using low temperature. The surface of C-dots was passivated by poly(ethylene glycol) (PEG) with variations in volume from 0.5 ml, 1 ml, and 1.5 ml. Luminescense properties before and after passivasive with PEG characterized using photoluminescense (PL) and time resolved photoluminescence (TRPL) spectrophotometer. Peak wavelength spectrum of PL shows a red shift when 0.5 ml PEG was added. However, when the addition of PEG increases, peak wavelength spectrum of PL shows a blue shift. PL intensity decreased along with increasing of PEG volume. PL intensity influenced C-dots electron time decay linearly. C-dots electron time decay increased along with decreased of PL intensity. This results assigned potency that C-dots in water solution can be applied as bioimaging and metal ion and salt biosensing. however, it needs extra optical measurements to support our discovery.

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Section: Resultsmentioning

confidence: 99%

Photoluminescence Properties of Poly (Ethylene Glycol) Passivated Carbon Dots from Cassava Peels

Putro

Roza

Isnaeni³

2019

indonesian.j.of.science.and.education

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“…The time difference of all electrons corresponds to different electron-hole recombination mechanisms [35]. Electron time decay measurements are used to determine the PL properties that show some energy levels of C-dots [36]. The electron time measurements are carried out under the excitation pulse, and its decay is recorded after the excitation pulse ends [31].…”

Section: Resultsmentioning

confidence: 99%

The Effect of Poly (Ethylene Glycol) on the Photoluminescence Properties of Carbon Dots From Cassava Peels Synthesized by Hydrothermal Methods

Putro

Roza

Isnaeni

2019

SPEKTRA

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Carbon dots (C-dots) have been successfully synthesized from cassava peels using the hydrothermal method. The C-dots are further passivated using poly (ethylene glycol) (PEG) with a variation of the volume of 0.5 ml, 1.0 ml, and 1.5 ml. The properties of photoluminescence C-dots before and after PEG were characterized using photoluminescence (PL) and time-resolved photoluminescence (TRPL) spectrophotometers. PEG succeeded in influencing PL C-dots properties, such as peak wavelength, PL intensity, and electron time decay. The addition of 0.5 ml of PEG to C-dots is the optimum condition and best with the peak wavelength, the PL intensity and, time decay electron is 507.52 nm, 5302 a.u, and 3.794031133 ns, respectively.

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“…The working principle for C-dot-based compositions for fingerprint recovery lies in the fact that they adopt different colours when illuminated by different light sources, enabling background-free images and maximising the reliability of fingerprint analysis. While C-dots in the solid state have a tendency to self-quench [39], several strategies have been proposed to overcome this effect, including the use of a diluent matrix [40,41], the development of core-shell nanostructures [42], the incorporation of heteroatom doping [43,44], exploitation of effects such as resonance energy transfer [RET] and π-π interactions [45] and the use of molecular spacers [46]. C-dot-based powders for fluorescent visualisation of latent fingerprints were first demonstrated by Fernandes et al [40], who showed that the incorporation of 0.7 wt.…”

Section: Latent Fingerprint Enhancementmentioning

confidence: 99%

Carbon Dots for Forensic Applications: A Critical Review

Verhagen

Kelarakis

2020

Nanomaterials

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Owing to their superior fluorescence performance, inexpensive synthesis and nontoxic nature, carbon dots (C-dots) are systematically explored in a variety of applications; in this review, we outline and critically discuss recent trends with respect to their potential exploitation in criminal investigation, forensic toxicology and anti-counterfeit interventions. Capitalising on their colour-tuneable behaviour (in the sense that they adopt different colours with respect to the incident radiation), C-dot-based compositions are ideal for the visual enhancement of latent fingerprints, affording improved contrast against multicoloured and patterned backgrounds. As highly sensitive and highly selective optical nanoprobes, C-dots show excellent analytical performance in detecting biological compounds, drugs, explosives, heavy metals and poisonous reactants. In addition, benefiting from their versatile structural and chemical composition, C-dots can be incorporated into ink and polymeric formulations capable of functioning as a new generation of cost-effective barcodes and security nanotags for object authentication and anti-counterfeit applications. Translating these encouraging research outcomes into real-life innovations with significant social and economic impact requires an open, multidisciplinary approach and a close synergy between materials scientists, biologists, forensic investigators and digital engineers.

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White-emitting carbon dots with long alkyl-chain structure: Effective inhibition of aggregation caused quenching effect for label-free imaging of latent fingerprint

Cited by 117 publications

References 67 publications

Photoluminescence Properties of Poly (Ethylene Glycol) Passivated Carbon Dots from Cassava Peels

Photoluminescence Properties of Poly (Ethylene Glycol) Passivated Carbon Dots from Cassava Peels

The Effect of Poly (Ethylene Glycol) on the Photoluminescence Properties of Carbon Dots From Cassava Peels Synthesized by Hydrothermal Methods

Carbon Dots for Forensic Applications: A Critical Review

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