Liquid crystalline multilayer graphene quantum dots with hackelite structures: Characterisation and application for sensing nitrophenols

Interlayer electron flow and field shielding in twisted trilayer graphene quantum dots

Nanoscale ◽

10.1039/d1nr06808c ◽

2022 ◽

Author(s):

Xian Wang ◽

Yingqi Cui ◽

Li Zhang ◽

Mingli Yang

Keyword(s):

Quantum Dots ◽

Electron Mobility ◽

Electron Flow ◽

Electronic Devices ◽

Graphene Quantum Dots ◽

Electrical Conductance ◽

Multilayer Graphene ◽

Trilayer Graphene

While multilayer graphene (MLG) possesses excellent intralayer electron mobility, its interlayer electrical conductance exhibits great diversity that results in exotic phenomena and various applications in electronic devices. Driven by a...

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Photophysical Properties of Multilayer Graphene–Quantum Dots Hybrid Structures

Nanomaterials ◽

10.3390/nano10040714 ◽

2020 ◽

Vol 10 (4) ◽

pp. 714 ◽

Cited By ~ 1

Author(s):

Ivan Reznik ◽

Andrey Zlatov ◽

Mikhail Baranov ◽

Roman Zakoldaev ◽

Andrey Veniaminov ◽

...

Keyword(s):

Quantum Dots ◽

Energy Transfer ◽

Average Rate ◽

Photophysical Properties ◽

Graphene Quantum Dots ◽

Hybrid Structures ◽

Multilayer Graphene ◽

Cdse Qds ◽

Efficient Charge ◽

Photoinduced Processes

Photoelectrical and photoluminescent properties of multilayer graphene (MLG)–quantum dots (QD) hybrid structures have been studied. It has been shown that the average rate of transfer from QDs to the MLG can be estimated via photoinduced processes on the QDs’ surfaces. A monolayer of CdSe QDs can double the photoresponse amplitude of multilayer graphene, without influencing its characteristic photoresponse time. It has been found that efficient charge or energy transfer from QDs to MLG with a rate higher than 3 × 108 s−1 strongly inhibits photoinduced processes on the QD surfaces and provides photostability for QD-based structures.

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Single-particle energy – and optical absorption – spectra of multilayer graphene quantum dots

Superlattices and Microstructures ◽

10.1016/j.spmi.2019.106171 ◽

2019 ◽

Vol 132 ◽

pp. 106171 ◽

Cited By ~ 1

Author(s):

C. Wimmenauer ◽

J. Scheller ◽

S. Fasbender ◽

T. Heinzel

Keyword(s):

Quantum Dots ◽

Optical Absorption ◽

Absorption Spectra ◽

Single Particle ◽

Graphene Quantum Dots ◽

Particle Energy ◽

Multilayer Graphene ◽

Single Particle Energy ◽

Optical Absorption Spectra

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An insight into electronic and optical properties of multilayer graphene quantum dots synthesized by hydrothermal approach

Synthetic Metals ◽

10.1016/j.synthmet.2018.03.005 ◽

2018 ◽

Vol 239 ◽

pp. 36-42 ◽

Cited By ~ 4

Author(s):

Shikha Jindal ◽

Sushama M. Giripunje

Keyword(s):

Quantum Dots ◽

Optical Properties ◽

Graphene Quantum Dots ◽

Multilayer Graphene ◽

Electronic And Optical Properties ◽

Hydrothermal Approach ◽

Insight Into

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Graphene Quantum Dots and Cu(I) Liquid Crystal for Advanced Electrochemical Detection of Doxorubicine in Aqueous Solutions

Nanomaterials ◽

10.3390/nano11112788 ◽

2021 ◽

Vol 11 (11) ◽

pp. 2788

Author(s):

Sorina Motoc Ilies ◽

Bianca Schinteie ◽

Aniela Pop ◽

Sorina Negrea ◽

Carmen Cretu ◽

...

Keyword(s):

Quantum Dots ◽

Aqueous Solutions ◽

Liquid Crystalline ◽

Limit Of Detection ◽

Graphene Quantum Dots ◽

Differential Pulse ◽

Trace Concentration ◽

Detection Stage ◽

Pulse Voltammetry ◽

Concentration Levels

Two paste electrodes based on graphene quantum dots and carbon nanotubes (GRQD/CNT) and one modified with a homoleptic liquid crystalline Cu(I) based coordination complex (Cu/GRQD/CNT) were obtained and morphostructurally and electrochemically characterized in comparison with simple CNT electrode (CNT) for doxorubicine (DOX) detection in aqueous solutions. GRQD/CNT showed the best electroanalytical performance by differential pulse voltammetry technique (DPV). Moreover, applying a preconcentration step prior to detection stage, the lowest limit of detection (1 ng/L) and the highest sensitivity (216,105 µA/mgL−1) in comparison with reported literature data were obtained. Cu/GRQD/CNT showed good results using multiple pulse amperometry technique (MPA) and a favorable shifting of the potential detection to mitigate potential interferences. Both GRQD-based paste electrodes have a great potential for practical utility in DOX determination in water at trace concentration levels, using GRQD/CNT with DPV and in pharmaceuticals formulations using Cu/GRQD/CNT with MPA.

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