jinzhitong

Nature Photonics, Published online: 28 April 2020; doi:10.1038/s41566-020-0621-1

Using a photonic crystal slab combined with a conventional optical imaging system, a two-dimensional optical image differentiator is experimentally demonstrated for edge detection.

Nature, Published online: 06 May 2020; doi:10.1038/s41586-020-2260-6

Small-angle twisted bilayer–bilayer graphene is tunable by the twist angle and electric and magnetic fields, and can be used to gain further insights into correlated states in two-dimensional superlattices.

Nature, Published online: 29 April 2020; doi:10.1038/s41586-020-2219-7

An epitaxial growth strategy that improves the stability of two-dimensional halide perovskites by inhibiting ion diffusion in their heterostructures using rigid π-conjugated ligands is demonstrated, and shows near-atomically sharp interfaces.

Nature Materials, Published online: 24 April 2020; doi:10.1038/s41563-020-0668-x

Two studies shed light on quantum defects in two-dimensional hexagonal boron nitride, identifying an optically addressable spin centre at room temperature and offering microscopic insights into different classes of single-photon emitters.

Nature, Published online: 28 April 2020; doi:10.1038/s41586-020-2237-5

Publisher Correction: Tunable correlated Chern insulator and ferromagnetism in a moiré superlattice

Graphene-based films with high toughness have many promising applications, especially for flexible energy storage and portable electrical devices. Achieving such high-toughness films, however, remains a challenge. The conventional mechanisms for improving toughness are crack arrest or plastic deformation. Herein we demonstrate black phosphorus (BP) functionalized graphene films with record toughness...

The shuttling-effect of soluble lithium-based polysulfides (LiPS) represents one of the main obstacles for practical application of lithium–sulfur (Li–S) batteries. Herein, to address this issue, a flexible Li–S interlayer consisting of a two-dimensional α-Co(OH) 2 nano-plate and graphene oxide (GO) is developed using a simple vacuum filtration technique. In the interlayer, the α-Co(OH) 2 and GO are assembled into a layered structure forming a physical barrier for the shuttling of LiPS. Additionally, the α-Co(OH) 2 offers strong chemical adsorption and efficient catalysis performance towards LiPS conversion, further inhibiting its shuttling. Attributed to these beneficial features of the interlayer, the Li–S battery delivers an initial discharge capacity of 834 mAh g −1 at the current density of 1 C. More importantly, after 300 cycles, a high discharge capacity of 590 mAh g −1 was retained, corresponding to a low capacity fading ...

Both synaptic emulators and brain-like calculation demand an energy-efficient and bio-realistic device where two-dimensional materials have been proven as a promising competitor. Lateral memristors based on transfer-free single-crystal MoS 2 with single layer grown by chemical vapor deposition (CVD) were fabricated. Here the MoS 2 memristor successfully emulates typical biological synaptic behaviors including excitatory/inhibitory post-synaptic current (EPSC/IPSC), spike timing-dependent plasticity (STDP), spike rate-dependent plasticity (SRDP) and long-term plasticity (LTP). Moreover, an interesting multi-state LTP and a low consumption of 1.8 pJ after LTP process are achieved which is attributed to the high resistance of transfer-free single-crystal monolayer MoS 2 , representing a low value among previous MoS 2 devices. The migration of Sulfur vacancies lead the conductance modulation by changing the Schottky barrier instead of forming a...