Quasi-one-dimensional phosphorene nanoribbons grown on silicon by space-confined chemical vapor transport

Abstract

Phosphorene nanoribbons (PNRs) combine the flexibility of one-dimensional (1D) nanomaterials with the large specific surface area and the edge and electron confinement effects of two-dimensional (2D) nanomaterials. In despite of...

A 2D-0D-2D Sandwich Heterostructure toward High-Performance Room-Temperature Gas Sensing

“…27,29,31 The intensity ratios of A 1 g /A 2 g and B 2g /A g 2 of BP for the exfoliated BP are obviously decreased compared with those for bulk BP (Figure S5b in the Supporting Information), indicating that the BP is partially oxidized during the exfoliation process. 35,41 However, the intensity ratio of B 2g /A g 2 of BP for the WS 2 -Au-BP-0.5 heterostructure is closer to that for bulk BP, indicating that the intercalation of a small amount of Au can inhibit the oxidation of few-layer BP. Additionally, the weak peak at 324 cm −1 corresponds to the bending vibrational frequency of bridging oxygen O−W−O, indicating that the exfoliated WS 2 is more likely to be oxidized due to the decreased number of layers.…”

“…The three vibrational bands at ∼360, 438, and 466 cm –1 are originated from BP, corresponding to the out-of-plane A g 1 , in-plane B 2 g , and A g 2 vibrational modes, respectively (see Figure b, as well as Figure S5a in the Supporting Information). , The two peaks at 351 and 417 cm –1 correspond to the in-plane optical mode ( E 2 g 1 ) and out-of-plane vibration modes ( A 1 g ) of WS 2 , respectively . Compared with bulk BP and WS 2 , the slight blue shift of these modes for exfoliated BP and WS 2 can be attributed to the decrease in the number of layers (Figure S5 in the Supporting Information). ,, The intensity ratios of A 1 g /A 2 g and B 2g / A g 2 of BP for the exfoliated BP are obviously decreased compared with those for bulk BP (Figure S5b in the Supporting Information), indicating that the BP is partially oxidized during the exfoliation process. , However, the intensity ratio of B 2g / A g 2 of BP for the WS 2 -Au-BP-0.5 heterostructure is closer to that for bulk BP, indicating that the intercalation of a small amount of Au can inhibit the oxidation of few-layer BP. Additionally, the weak peak at 324 cm –1 corresponds to the bending vibrational frequency of bridging oxygen O–W–O, indicating that the exfoliated WS 2 is more likely to be oxidized due to the decreased number of layers .…”

“…Synthesis of WS 2 -BP and WS 2 -Au-BP Heterostructures. The bulk WS 2 and BP were fabricated by hydrothermal method 53 and chemical vapor transport (CVT) method, 41 respectively. The different content of WS 2 nanosheets (50, 100, and 200 mg) and bulk BP (100 mg) were mixed and ground for 20 min, respectively.…”

Study on the Properties of the Ferroelectric Photocatalytic Hydrogen Evolution Reaction for Chemically Functionalized Phosphorene Nanosheets

“…Black phosphorene, as a member of the 2D materials’ family, has a layer-dependent tunable average band gap (0.3–2.1 eV), high on/off ratio (10 4 ), and mobility (1000 cm 2 V –1 s –1 ), and has been applied in nanoelectronic devices and electrocatalysts. − In particular, phosphorene has been considered a ferroelastic 2D material with ultrahigh reversible strain but has no ferroelectricity and ferroelasticity . Compared with MoS 2 , g-C 3 N 4 , graphene, and BN, phosphorene can exhibit much better light adsorption properties and a wider absorption spectrum, especially in the visible range, which is considered as a promising non-metal-based photocatalyst .…”