A single-step, electrochemical synthesis of nitrogen doped blue luminescent phosphorene quantum dots

Valappil, Manila Ozhukil; Ahlawat, Monika; Pillai, Vijayamohanan K.; Alwarappan, Subbiah

doi:10.1039/c8cc07266c

Cited by 25 publications

(13 citation statements)

References 27 publications

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“…Feng and co‐workers have reported an electrochemical delamination strategy to produce BPNSs: the one using tetra ‐ n ‐butylammonium cations and bisulfate anions can have an exfoliation yield up to 78% and flake sizes on a micrometer scale . Despite progress has been made, it is still challenging to prepare BPNSs mainly consisting of monolayer flakes through electrochemical exfoliation approach, which requires a better understanding of the mechanism of electrochemical exfoliation.…”

Section: Preparation Of Bpnssmentioning

confidence: 99%

Recent Advances in Chemical Functionalization of 2D Black Phosphorous Nanosheets

Thurakkal

Zhang

2019

Advanced Science

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BPNSs can be mechanically peeled off from bulk BP crystals using scotch-tape. [37] Although this method can produce high quality 2D BPNSs in a simple and cost-effective manner, the obtained BPNSs show inhomogeneous size, poor repeatability, and extremely low production yield. To obtain BPNSs in a high yield, several alternative methods were employed including metal assisted mechanical exfoliation [102] and exfoliation using polydimethylsiloxane (PDMS) stamp, [70] viscoelastic stamp using blue Nitto tape, [103] and poly(methyl methacrylate)/poly(vinyl alcohol) stack. [104] In another approach, Zhu and co-workers reported a large-scale preparation of relatively stable BPNSs through high energy solid-state mechanical ball milling of bulk BP in the presence of an additive LiOH. [105] The high-energy mechanical milling facilitates the generation of free radicals at the edges by breaking the PP bonds and thus leads to the formation of stable hydroxyl functionalized BPNSs. In addition, this method has been widely utilizing as an efficient method to synthesize functionalized BPNSs for various applications. [106,107] Adv. Sci. 2020, 7, 1902359 3.20-3.73 Å a 1L 2L 3L Bulk Armchair b

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Section: Preparation Of Bpnssmentioning

confidence: 99%

Recent Advances in Chemical Functionalization of 2D Black Phosphorous Nanosheets

Thurakkal

Zhang

2019

Advanced Science

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“…PQDs and NPQDs were synthesized from BP according to our previously reported single step electrochemical method as schematically represented in figure 1 [10,12]. Briefly, 50 μl of 2.0 mg ml −1 dispersion of BP (ACS materials) in deaerated ethanol was drop-dried on a 3 mm glassy carbon working electrode (GCE).…”

Section: Electrosynthesis Of Pqds and Npqdsmentioning

confidence: 99%

“…The product was then separated from the electrolyte by centrifugation. The nitrogen content in NPQDs were analysed using X-ray Photoelectron Spectroscopy which is 3.8 at% [10]. A systematic approach to vary the nitrogen content by controlling the electric field and time was not very successful to yield effective composition modulation with similar lateral sizes or number of layers.…”

Section: Electrosynthesis Of Pqds and Npqdsmentioning

confidence: 99%

“…While there are no experimental reports on heteroatom doped PQDs, we recently demonstrated a roomtemperature electrochemical approach to obtain nitrogen doped PQDs (NPQDs) [10]. An electrochemical in situ pathway to achieve heteroatom doping in phosphorene has all beneficial effects such as room temperature doping retaining all morphological features, precise regulation of amount to be doped, possibility of co-doping and compatibility with a variety of solvents.…”

Section: Introductionmentioning

confidence: 99%

“…However, one limitation of this approach is poor yield, which can be overcome by employing large area electrode, increasing the reaction time etc. Accordingly, we reported a cathodic exfoliation of BP in a non-aqueous medium as a promising approach for pristine PQDs and NPQDs synthesis [10,12]. Oxidation induced edge state functionalization by P=O, P-O-P functional groups can be minimized by a reductive cleavage of P-P bonds (bond energy 200 kJ mol −1 ), enabling a rapid reconstruction of the edge states using solvation energy.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electrochemical transformation of black phosphorous to phosphorene quantum dots: effect of nitrogen doping

Valappil

Alwarappan

et al. 2020

Mater. Res. Express

Self Cite

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We present a comparative analysis of the structural and optical properties of electrosynthesized PQDs, a new class of size-tunable luminescent materials and their nitrogen doped counter parts(NPQDs). Nitrogen doping onto phopshorene lattice could be realized in situ at room temperature using either nitrogen containing electrolyte and/or supporting electrolyte in the solution. An increased quantum efficiency as well as redox behavior has been observed for PQDs upon nitrogen doping and a critical analysis of the effect of nitrogen on the structural, optical and electrochemical properties of PQDs suggests several potential benefits of applications ranging from electrocatalysts and molecular electronics to different types of sensors and bioimaging.

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Microfluidic 3D Printing Responsive Scaffolds with Biomimetic Enrichment Channels for Bone Regeneration

Wang,

Yu,

Yang

et al. 2021

Adv Funct Materials

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Tissue‐engineered scaffolds have been extensively explored for treating bone defects; however, slow and insufficient vascularization throughout the scaffolds remains a key challenge for further application. Herein, a versatile microfluidic 3D printing strategy to fabricate black phosphorus (BP) incorporated fibrous scaffolds with photothermal responsive channels for improving vascularization and bone regeneration is proposed. The thermal channeled scaffolds display reversible shrinkage and swelling behavior controlled by near‐infrared irradiation, which facilitates the penetration of suspended cells into the scaffold channels and promotes the prevascularization. Furthermore, the embedded BP nanosheets exhibit intrinsic properties for in situ biomineralization and improve in vitro cell proliferation and osteogenic differentiation. Following transplantation in vivo, these channels also promote host vessel infiltration deep into the scaffolds and effectively accelerate the healing process of bone defects. Thus, it is believed that these near‐infrared responsive channeled scaffolds are promising candidates for tissue/vascular ingrowth in diverse tissue engineering applications.

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A single-step, electrochemical synthesis of nitrogen doped blue luminescent phosphorene quantum dots

Abstract: A one-step electrochemical preparation of nitrogen doped, blue luminescent phosphorene quantum dots from black phosphorus using a nitrogen-laden solvent and supporting electrolyte.

Cited by 25 publications

References 27 publications

Recent Advances in Chemical Functionalization of 2D Black Phosphorous Nanosheets

Recent Advances in Chemical Functionalization of 2D Black Phosphorous Nanosheets

Electrochemical transformation of black phosphorous to phosphorene quantum dots: effect of nitrogen doping

Microfluidic 3D Printing Responsive Scaffolds with Biomimetic Enrichment Channels for Bone Regeneration

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