Laser irradiated vortex fluidic mediated synthesis of luminescent carbon nanodots under continuous flow

Luo, Xuan; Al‐Antaki, Ahmed Hussein Mohammed; Vimalanathan, Kasturi; Moffatt, J.; Zheng, Kun; Zou, Yichao; Zou, Jin; Duan, Xiaofei; Lamb, Robert N.; Wang, Shu Jun; Li, Qin; Zhang, Wei; Raston, Colin L.

doi:10.1039/c7re00197e

Cited by 47 publications

(54 citation statements)

References 40 publications

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“…The lifetime has three emission components for CD@180 and CD@200, whereas it has only two components in the case of CD@240 and CD240 + Linker. The photoluminescence (PL) of CDs can be attributed to be arising from an integration of PL components from three different types of emission centers, namely, σ*–n and π*–n transitions (emissions from functional groups, corresponding to τ 1 ), π*– π transition (emissions from aromatic core of the CDs, corresponding to τ 2 ), and π*–mid‐gap state–π transitions (emissions dominated by the mid‐gap states that are created by functional groups and defects, corresponding to τ 3 ) . As the processing temperature increases, the defect states are also reduced, as indicated by the associated decreases in τ 3 .…”

Section: Carrier Lifetime Studiesmentioning

confidence: 99%

Biowaste‐Derived, Self‐Organized Arrays of High‐Performance 2D Carbon Emitters for Organic Light‐Emitting Diodes

et al. 2020

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Low‐cost flexible organic light‐emitting diodes (OLEDs) with nanoemitter material from waste open up new opportunities for sustainable technology. The common emitter materials generated from waste are carbon dots (CDs). However, these have poor luminescent properties. Further solid‐state emission quenching makes application in display devices challenging. Here, flexible and rigid OLED devices are demonstrated using self‐assembled 2D arrays of CDs derived from waste material, viz., human hair. High‐performance CDs with a quantum yield (QY) of 87%, self‐assembled into 2D arrays, are achieved by improving the crystallinity and decreasing the CDs' size distribution. The CD island array exhibits ultrahigh hole mobility (≈10−1 cm2 V−1 s−1) and significant reduction in solid‐state emission quenching compared to pristine CDs; hence, it is used here as an emitting layer in both indium tin oxide (ITO)‐coated glass and ITO‐coated flexible poly(ethylene terephthalate) (PET) substrate OLED devices, without any hole‐injection layer. The flexible OLED device exhibits a stable, voltage‐independent blue/cyan emission with a record maximum luminescence of 350 cd m−2, whereas the OLED device based on the rigid glass substrate shows a maximum luminescence of 700 cd m−2. This work sets up a platform to develop next‐generation OLED displays using CD emitters derived from the biowaste material.

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Section: Carrier Lifetime Studiesmentioning

confidence: 99%

Biowaste‐Derived, Self‐Organized Arrays of High‐Performance 2D Carbon Emitters for Organic Light‐Emitting Diodes

et al. 2020

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“…h‐BN@magnetite composite from single step VFD processing exhibited high phosphate ion adsorption capacity of up to 171.2 mg PO 4 3− g −1 of Fe based on recycling the materials for five times. The VFD has also been intensively used to fabricate and manipulate 2D materials, including decorating p ‐phosphonic acid calix[8]arene functionalized graphene with well‐dispersed ultrafine palladium nanoparticles (≈2 nm), exfoliating graphite and boron nitride, fabricating single wall carbon nanotube toroids ( Figure c), decorating carbon nano‐onions with platinum or palladium nanoparticles (Figure a), fabricating carbon dots (Cds) (≈6 nm) from multiwalled carbon nanotube, and lateral slicing of carbon nanotubes . It is remarkably effective in exfoliating graphite in water and then decorating the multilayer 2D sheets on the surface of microalgal cells (Figure b).…”

Section: Classification Of Microfluidic Synthesis Systemsmentioning

confidence: 99%

Microfluidic Devices in Fabricating Nano or Micromaterials for Biomedical Applications

Luo

Zhang

et al. 2019

Adv Materials Technologies

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Nano or microsized particles have been a research focus for decades, and the advancement of microfluidic technologies provides alternative strategies for the synthesis of such materials for various applications. Recent advances of using different microfluidic devices (MDs), including continuous laminar flow, segmented flow, droplet‐based, and other non‐chip‐based microreactors, for the synthesis of nano or microsized particles with specific properties are reviewed, along with their biomedical applications. Different categories of particles fabricated in MDs are summarized to highlight the wide application of the processing platform in the development of novel functional materials.

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Section: Microchemical Systems For Size and Structure Control Of Novementioning

confidence: 99%

Manipulation and Control of Structure and Size of Inorganic Nanomaterials in Microchemical Systems

Luo

Wang

et al. 2019

Chem Eng & Technol

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Microchemical systems exhibit a unique capacity of preparing and manipulating various nanomaterials. In this review, the state‐of‐the‐art microchemical systems and the on‐demand development for the preparation of novel inorganic nanomaterials with certain dimensions or complex structures are summarized and discussed. Multistep synthesis and manipulation in microchemical systems are presented and compared, as well as new strategies such as in‐line monitoring, feedback control, and self‐optimization. The design and strategy for tuning the nucleation, growth, functionalization, and assembly of nanomaterials are considered. The challenges are put forward and an outlook for the future directions of nanomaterial preparation and production in microchemical systems is specially provided.

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Laser irradiated vortex fluidic mediated synthesis of luminescent carbon nanodots under continuous flow

Abstract: High shear vortex fluidics coupled with NIR affords luminescent carbon dots as a scalable process.

Cited by 47 publications

References 40 publications

Biowaste‐Derived, Self‐Organized Arrays of High‐Performance 2D Carbon Emitters for Organic Light‐Emitting Diodes

Biowaste‐Derived, Self‐Organized Arrays of High‐Performance 2D Carbon Emitters for Organic Light‐Emitting Diodes

Microfluidic Devices in Fabricating Nano or Micromaterials for Biomedical Applications

Manipulation and Control of Structure and Size of Inorganic Nanomaterials in Microchemical Systems

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