Abstract

We report a low-temperature colloidal synthesis of single-layer, five-atom-thick, beta-In2Se3 nanosheets with lateral sizes tunable from 300 to 900 nm, using short aminonitriles (dicyandiamide or cyanamide) as shape controlling agents. The phase and the monolayer nature of the nanosheets were ascertained by analyzing the intensity ratio between two diffraction peaks from two-dimensional slabs of the various phases, determined by diffraction simulations. These findings were further backed-up by comparing and fitting the experimental X-ray diffraction pattern with Debye formula simulated patterns and with side-view high-resolution transmission electron microscopy imaging and simulation. The beta-In2Se3 nanosheets were found to be indirect band gap semiconductors (Eg = 1.55 eV), and single nanosheet photodetectors demonstrated high photoresponsivity and fast response times.

Autore Pugliese

• Giannini Cinzia

Tutti gli autori

• Almeida G.; Dogan S.; Bertoni G.; Giannini C.; Gaspari R.; Perissinotto S.; Krahne R.; Ghosh S.; Manna L.

Titolo volume/Rivista

Journal of the American Chemical Society

Anno di pubblicazione

2017

ISSN

0002-7863

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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