Monolayer black phosphorus by sequential wet-chemical surface oxidation

Wild, Stefan; Lloret, Vicent; Vega‐Mayoral, Victor; Vella, Daniele; Nuin, Edurne; Siebert, Martin; Koleśnik-Gray, Maria; Löffler, Mario; Mayrhofer, Karl Johann Jakob; Gadermaier, Christoph; Krstić, Vojislav; Hauke, Frank; Abellán, Gonzalo; Hirsch, Andreas

doi:10.1039/c8ra09069f

Cited by 33 publications

(38 citation statements)

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“…While encapsulation and working inside a dry-box have been used to get around this problem, 20,31 a simpler solution would of course be welcome. Herein, we report, for the first time to our knowledge, the exfoliation and size selection of TiS 2 in an open atmosphere at room temperature in such a manner that degradation has been neutralized.…”

Section: Introductionmentioning

confidence: 99%

Solvent exfoliation stabilizes TiS₂ nanosheets against oxidation, facilitating lithium storage applications

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Solvent exfoliation stabilizes TiS₂ nanosheets against oxidation, facilitating lithium storage applications

et al. 2019

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“…With dispersing time increases, the absorbance intensity at 470 nm (A) decreases by 96.0% (as compared with the original value A 0 ) for FL-BP after 7 days, and 95.6% for FL-BP/AMPTS after 10 days (Figure 5e). For FL-BP/PFDTS, the absorbance intensity of FL-BP (9.0%), as well as the concentration of PO 4 3− (0.01 to 0.021) remain at the same level, even after 60 days. The result suggests the fast degradation of FL-BP and FL-BP/AMPTS in aqueous solution.…”

Section: Resultsmentioning

confidence: 96%

“…To further prove the improved stability of FL-BP/DDTS and FL-BP/PFDTS, UV-vis spectra are conducted to monitor the variation of FL-BP concentration, as well as corresponding PO 4 3− concentration ( Figure S15 in the Supporting Information for more details [37] ) during the degradation of FL-BP in aqueous solution. At initial stage, the same concentration (7 µg mL −1 ) of four samples dispersion gives the almost same UV-vis absorbance intensity at 470 nm.…”

Section: Resultsmentioning

confidence: 99%

Robust Amphiphobic Few‐Layer Black Phosphorus Nanosheet with Improved Stability

Liu

Bai

et al. 2019

Advanced Science

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Few‐layer black phosphorus (FL‐BP) has been intensively studied due to its attractive properties and great potential in electronic and optoelectronic applications. However, the intrinsic instability of FL‐BP greatly limits its practical application. In this study, the amphiphobic FL‐BP is achieved by functionalization of 1H,1H,2H,2H‐perfluorooctyltrichlorosilane (PFDTS) on the surface of FL‐BP. The obtained PFDTS coated FL‐BP (FL‐BP/PFDTS) demonstrates enhanced stability, which is not observed during significant degradation for 2 months in high moisture content environment (95% humidity). Particularly, attributing to the surface amphiphobicity, FL‐BP/PFDTS exhibits strong surface water repellency in the presence of oleic acid (as the contaminant), while other passivation coating layers (such as hydrophilic or hydrophobic coating) become hydrophilicity under such conditions. Owing to this advantage, the obtained FL‐BP/PFDTS demonstrates enhanced stability in high moisture content environment for 2 months, even though the surface is contaminated by oil liquid or other organic solvents (such as oleic acid, CH2Cl2, and N‐methyl‐2‐pyrrolidone). The passivation of FL‐BP by amphiphobic coating provides an effective approach for FL‐BP stabilization toward future applications.

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“…The thickness of a monolayer phosphorene is considered to be 0.53 nm . However, in practice the thickness may vary depending on the substrate used and whether it has been oxidized (Figure e,f) . AFM can provide further information about surface functionalization on BPNSs (an increase in thickness) and oxidative degradation by the loss of smooth surface morphology …”

Section: Characterization 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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Monolayer black phosphorus by sequential wet-chemical surface oxidation

Abstract: We report a straightforward chemical methodology for controlling the thickness of black phosphorus flakes down to the monolayer limit by layer-by-layer oxidation and thinning, using water as solubilizing agent.

Cited by 33 publications

References 50 publications

Solvent exfoliation stabilizes TiS₂ nanosheets against oxidation, facilitating lithium storage applications

Solvent exfoliation stabilizes TiS₂ nanosheets against oxidation, facilitating lithium storage applications

Robust Amphiphobic Few‐Layer Black Phosphorus Nanosheet with Improved Stability

Recent Advances in Chemical Functionalization of 2D Black Phosphorous Nanosheets

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Monolayer black phosphorus by sequential wet-chemical surface oxidation

Abstract: We report a straightforward chemical methodology for controlling the thickness of black phosphorus flakes down to the monolayer limit by layer-by-layer oxidation and thinning, using water as solubilizing agent.

Cited by 33 publications

References 50 publications

Solvent exfoliation stabilizes TiS2 nanosheets against oxidation, facilitating lithium storage applications

Solvent exfoliation stabilizes TiS2 nanosheets against oxidation, facilitating lithium storage applications

Robust Amphiphobic Few‐Layer Black Phosphorus Nanosheet with Improved Stability

Recent Advances in Chemical Functionalization of 2D Black Phosphorous Nanosheets

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Product

Resources

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Solvent exfoliation stabilizes TiS₂ nanosheets against oxidation, facilitating lithium storage applications

Solvent exfoliation stabilizes TiS₂ nanosheets against oxidation, facilitating lithium storage applications