Fibrous Phosphorus Quantum Dots for Cell Imaging

Amaral, Pedro E. M.; Hall, Donald C.; Pai, Rahul; Król, Jarosław; Kalra, Vibha; Ehrlich, Garth D.; Ji, Hai‐Feng

doi:10.1021/acsanm.9b01786

Cited by 22 publications

(23 citation statements)

References 63 publications

(96 reference statements)

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“…The band gaps were calculated to be 2.7, 2.53, and 2.5 eV with the centrifugal speeds of 10 000, 8000, and 6000 rpm, respectively. They agree with the results observed for FPQDs and bulk samples . For instance, FPQDs with an average size of 3.8 nm have a band gap of 3.3 eV, whereas the optical band gap observed for bulk FP is 2.1 eV.…”

Section: Resultssupporting

confidence: 90%

“…In addition, phosphorus is one of the most important elements in living organisms and so FP has a huge advantage in cell imaging. Amaral et al found that FP quantum dots (FPQDs) can produce a blue fluorescence in human adenocarcinoma cells . The quantum confinement effect leads to broadening the band gap, resulting in the emission of a blue fluorescence.…”

Section: Introductionmentioning

confidence: 99%

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Controllable Liquid Exfoliation of Fibrous Phosphorus and Its Live-Cell Imaging

et al. 2021

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One-dimensional materials have been intensively studied because of their diverse properties, which are revealed when exfoliated from their bulk precursor. Liquid exfoliation is not only possibly the most suitable method for large-scale applications but also affords an opportunity to develop new deposition techniques. Fibrous phosphorus is a relatively new, onedimensional material with high carrier mobility and a fast response velocity for future application in nanodevices. Because controllable liquid exfoliation processing of fibrous phosphorus (FP) remains challenging, we considered two factors: the exfoliated result and the removable solvents. We proposed a method for determining suitable solvents for efficient exfoliation and controllable size of fibrous phosphorus using Hansen solubility parameters. By controlling the water/acetone mixture ratios, the exfoliation effect could be controlled. Our work showed that 40% of the FP nanofibers were less than 10 nm in thickness and 70% of them were less than 20 nm. Furthermore, fibrous phosphorus produced a red fluorescence in bioimaging.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Controllable Liquid Exfoliation of Fibrous Phosphorus and Its Live-Cell Imaging

et al. 2021

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“…XPS measurements (Supplementary Fig. 1 ) show two peaks with binding energies of ~130.6 and 131.2 eV, which correspond to 2 p 3/2 and 2 p 1/2 of phosphorus–phosphorus bonds in 1D vdW FRP, respectively 5 , 39 . The EDS spectrum (Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Giant anisotropic photonics in the 1D van der Waals semiconductor fibrous red phosphorus

Zhao

et al. 2021

Nat Commun

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A confined electronic system can host a wide variety of fascinating electronic, magnetic, valleytronic and photonic phenomena due to its reduced symmetry and quantum confinement effect. For the recently emerging one-dimensional van der Waals (1D vdW) materials with electrons confined in 1D sub-units, an enormous variety of intriguing physical properties and functionalities can be expected. Here, we demonstrate the coexistence of giant linear/nonlinear optical anisotropy and high emission yield in fibrous red phosphorus (FRP), an exotic 1D vdW semiconductor with quasi-flat bands and a sizeable bandgap in the visible spectral range. The degree of photoluminescence (third-order nonlinear) anisotropy can reach 90% (86%), comparable to the best performance achieved so far. Meanwhile, the photoluminescence (third-harmonic generation) intensity in 1D vdW FRP is strong, with quantum efficiency (third-order susceptibility) four (three) times larger than that in the most well-known 2D vdW materials (e.g., MoS2). The concurrent realization of large linear/nonlinear optical anisotropy and emission intensity in 1D vdW FRP paves the way towards transforming the landscape of technological innovations in photonics and optoelectronics.

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“…It is composed of tubular strands with a monoclinic crystal structure 28 . Fibrous phosphorus also belongs to the family of phosphorus allotropes, composed of 1D tubular layers held together by van der Waals interactions 29 , 30 .…”

Section: Introductionmentioning

confidence: 99%

Flat epitaxial quasi-1D phosphorene chains

et al. 2021

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The emergence of peculiar phenomena in 1D phosphorene chains (P chains) has been proposed in theoretical studies, notably the Stark and Seebeck effects, room temperature magnetism, and topological phase transitions. Attempts so far to fabricate P chains, using the top-down approach starting from a few layers of bulk black phosphorus, have failed to produce reliably precise control of P chains. We show that molecular beam epitaxy gives a controllable bottom-up approach to grow atomically thin, crystalline 1D flat P chains on a Ag(111) substrate. Scanning tunneling microscopy, angle-resolved photoemission spectroscopy, and density functional theory calculations reveal that the armchair-shaped chains are semiconducting with an intrinsic 1.80 ± 0.20 eV band gap. This could make these P chains an ideal material for opto-electronic devices.

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Fibrous Phosphorus Quantum Dots for Cell Imaging

Cited by 22 publications

References 63 publications

Controllable Liquid Exfoliation of Fibrous Phosphorus and Its Live-Cell Imaging

Controllable Liquid Exfoliation of Fibrous Phosphorus and Its Live-Cell Imaging

Giant anisotropic photonics in the 1D van der Waals semiconductor fibrous red phosphorus

Flat epitaxial quasi-1D phosphorene chains

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