Covalent functionalization and passivation of exfoliated black phosphorus via aryl diazonium chemistry.

By Christopher R. Ryder, J. Wood, Spencer A. Wells, Yang Yang, Deep Jariwala, T. Marks, George C. Schatz, Mark C. Hersam. Nature Chemistry, 2016

708 citations recorded by the source corpus.

Functionalization of atomically thin nanomaterials enables the tailoring of their chemical, optical and electronic properties. Exfoliated black phosphorus (BP)-a layered two-dimensional semiconductor-exhibits favourable charge-carrier mobility, tunable bandgap and highly anisotropic properties, but it is chemically reactive and degrades rapidly in ambient conditions. Here we show that covalent aryl diazonium functionalization suppresses the chemical degradation of exfoliated BP even after three weeks of ambient exposure. This chemical modification scheme spontaneously forms phosphorus-carbon bonds, has a reaction rate sensitive to the aryl diazonium substituent and alters the electronic properties of exfoliated BP, ultimately yielding a strong, tunable p-type doping that simultaneously improves the field-effect transistor mobility and on/off current ratio. This chemical functionalization pathway controllably modifies the properties of exfoliated BP, and thus improves its prospects for nanoelectronic applications.

Subfields: Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/16bc7a489b08fb5544b9e096328b63eeef7682e7

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Citations in the corpus

• Recent advances in synthesis, properties, and applications of phosphorene (2017, background): “63 Similarly, covalent diazonium functionalization of phosphorene suppresses its chemical degradation and significantly improves its stability.(64) Other studies have found that the addition of Cu adatoms(65) or chemical doping with benzyl viologen(66) can be used as an effective electron doping str”
• Few-layer antimonene decorated microfiber: ultra-short pulse generation and all-optical thresholding with enhanced long term stability (2017, methodology): “Consequently, several stabilization strategies had been performed in order to enhance its anti-oxidation ability, including covalent functionalization with aryl diazonium [23] and Ti sulfonate ligand [24], noncovalent functionalization with polycyclic aromatic compounds [25–27], and encapsulation by”