期刊
CHEMISTRY OF MATERIALS
卷 30, 期 14, 页码 4667-4674出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.8b01306
关键词
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资金
- Irish Research Council Government of Ireland Postgraduate Scholarship Programme [GOIPG/2015/2933]
- Science Foundation Ireland (SFI) [12/RC/2278]
- SFI Technology Innovation & Development Award [15/TIDA/2893, 14/IA/2581]
Since the isolation of two-dimensional (2D) phosphorene, black phosphorus (BP) has gained popularity due to its high carrier mobility and tunable bandgap. Poor ambient stability of BP remains a key issue and impedes its use in electronic applications. Here we report a new stabilization strategy based on covalent functionalization of liquid exfoliated few-layer BP using aryl iodonium salts. Arylation of BP using iodonium salts enables covalent modification without inducing oxidation and alters the degradation chemistry of BP by inhibiting bridged oxygen formation through attachment to surface oxygen sites. In comparison, functionalization using aryl diazonium salts results in oxidation and aryl multilayer formation and does not adequately disrupt noncovalent solvent passivation. Aryl functionalization of BP using iodonium salts displays superior ambient stability compared to arylation using diazonium salts associated with greater covalent functionalization as characterized using X-ray photoelectron spectroscopy, scanning transmission electron microscopy, photoluminescence, and attenuated total reflectance infrared spectroscopy.
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