The new findings reported herein should pave the ways for the thickness‐tunable growth of atomically thin SnSe2 crystals, and their unique optical property explorations and applications in ...

2021年3月1日 · The XPS analysis was employed to explore chemical states of elements in the 2D/2D SnSe2/graphene heterostructure, with the full-scale spectra displayed in Fig. S6. The high revolution Se 3d XPS peaks are located at 53.1, 54.0, and 55.1 eV ( Fig. 3 b), which are ascribed to the Se 3d5/2, Se 3d, and Se 3d3/2 phases of SnSe2, respectively.

2022年10月17日 · Here, we develop a physical vapor deposition approach to synthesize two-dimensional p-doped SnSe. The local phase segregation of SnSe 2 microdomains and accompanying interfacial charge transfer...

2023年2月14日 · In this work, we report the low-pressure PVD synthesis of high-quality 2D SnSe crystals with thinner thickness and larger lateral sizes. The as-synthesized SnSe displays high crystallinity and phase purity, as confirmed by Raman, X-ray photoemission spectroscopy (XPS), and scanning transmission electron ((micro-scopy)) (STEM).

Atomic force microscopy (AFM), Raman, photoluminescence (PL) and X-ray Photoelec-tron Spectroscopy (XPS) characterization reveal that the as-synthesized few-layer SnSe2 (with a thickness of 1.34 nm) are of high quality with an indirect bandgap z1.74 eV, while subsequent variable temperature (77–298 K) Raman and PL measurements provide SnSe2 latt...

SnSe2/CNT photo-detector is studied under polychromatic white light illumination with varying power intensity under atmospheric conditions and in vacuum. The photo-detector shows excellent...

Insets in (c) and (d): the corresponding fast Fourier transform (FFT) diffraction patterns. from publication: Solution‐Processed p‐SnSe/n‐SnSe2 Hetero‐Structure Layers for Ultrasensitive ...

2020年7月14日 · By means of experiments and theory, the gas-sensing properties of tin diselenide (SnSe 2) were elucidated. We discover that, while the stoichiometric single crystal is chemically inert even in air, the nonstoichiometric sample assumes a subnanometric SnO 2 surface oxide layer once exposed to ambient atmosphere.

2024年4月23日 · These discernible XRD patterns unequivocally confirmed the presence of a hexagonal phase in the MCs NFs, devoid of any impurity phases. XPS was utilized to explore the chemical state and composition of the MCs NFs. The XPS spectra for SnS 2 and SnSe 2 on Si substrates are shown in Figure 1b–d.

2024年2月21日 · X-ray photoelectron spectroscopy (XPS) analysis further determine the surface chemical state and electronic structure of SnSe 2 @CNFs. The survey spectrum in figure 4(a) confirms the existence of C, N, Sn and Se within the composite.