A5069564606- Graphene research and applications
- 2D Materials and Applications
- Advanced Memory and Neural Computing
- Perovskite Materials and Applications
- Topological Materials and Phenomena
- Gas Sensing Nanomaterials and Sensors
- Quantum and electron transport phenomena
- ZnO doping and properties
- Ferroelectric and Negative Capacitance Devices
- Muon and positron interactions and applications
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Solid-state spectroscopy and crystallography
- Advanced Sensor and Energy Harvesting Materials
- Magnetic and transport properties of perovskites and related materials
- Transition Metal Oxide Nanomaterials
- Advanced Photocatalysis Techniques
- Thermal properties of materials
- MXene and MAX Phase Materials
- Electronic and Structural Properties of Oxides
- Carbon Nanotubes in Composites
- Magnetic properties of thin films
- Ga2O3 and related materials
- Advanced Condensed Matter Physics
- Organic Electronics and Photovoltaics
Nanjing University of Science and Technology
2021-2025
Physical Sciences (United States)
2025
University of Science and Technology of China
1999-2024
Guilin University of Technology
2024
Sichuan University
2024
Suzhou University of Science and Technology
2023-2024
Hefei National Center for Physical Sciences at Nanoscale
2020-2024
CAS Key Laboratory of Urban Pollutant Conversion
2020-2024
Chinese Academy of Sciences
2020-2024
City University of Hong Kong
2024
Small-diameter (<5 nm), single-crystalline SnO2 nanorods were synthesized in solution with a mean length of 17 ± 4 nm (mean aspect ratio 4:1) the [001] direction along major axis. Two characteristic peaks at 576 and 356 cm-1 Raman spectrum further confirmed small crystal size. The exhibit red emission 580 nm.
Early processing of visual information takes place in the human retina. Mimicking neurobiological structures and functionalities retina provides a promising pathway to achieving vision sensor with highly efficient image processing. Here, we demonstrate prototype that operates via gate-tunable positive negative photoresponses van der Waals (vdW) vertical heterostructures. The emulates not only bipolar cells photoreceptors but also unique connectivity between photoreceptors. By tuning gate...
Abstract Two dimensional inorganic–organic hybrid perovskites (2D perovskites) suffer from not only quantum confinement, but also dielectric hindering their application perspective in devices involving the conversion of an optical input into current. In this report, we theoretically predict that extremely low exciton binding energy can be achieved 2D by using high dielectric-constant organic components. We demonstrate (HOCH 2 CH NH 3 ) PbI 4 , whose material has a constant 37, confinement is...
By virtue of the layered structure, van der Waals (vdW) magnets are sensitive to lattice deformation controlled by external strain, providing an ideal platform explore one-step magnetization reversal that is still conceptual in conventional due limited strain-tuning range coercive field. In this study, a uniaxial tensile strain applied thin flakes vdW magnet Fe3 GeTe2 (FGT), and dramatic increase field (Hc ) more than 150% with 0.32% observed. Moreover, change transition temperatures between...
1-D ZnO nanorods with different aspect ratios were synthesized by a one-step, hydrothermal method. The grow along the [0001] direction to form single crystals. experimental results reveal that growth of polar inorganic crystals is sensitive reaction solvents.
We demonstrate the fabrication of 2-D arrays nanopillars made from perfluoropolyether derivatives using a porous anodic aluminum oxide membrane as template. Pretexturing prior to anodization enables one engineer multiple morphological length scales and thereby synthesize lotus-leaf-like topography. Both on flat surface topology exhibit superhydrophobicity, low contact angle hysteresis, self-cleaning.
Hot carrier (HC) cooling is a critical photophysical process that significantly influences the optoelectronic performance of hybrid perovskite-based devices. The hot extraction at device interface very challenging because its ultrashort lifetime. Here, ultrafast transient reflectance spectroscopy measurements and time-domain ab initio calculations show how dielectric constant organic spacers can control slow HC dynamics in single-crystal 2D Ruddlesden-Popper perovskites. We find (EA)2PbI4...
3D organic-inorganic hybrid halide perovskites have attracted great interest due to their impressive optoelectronic properties. Recently, the emergence of 2D layered perovskites, with excellent and tunable behavior, has encouraged researchers develop next generation optoelectronics based on these materials. However, device fabrication methods scalable patterning both types are still lacking as materials readily damaged by organic solvents in standard lithographic processes. We conceived...
Abstract Compared to human vision, conventional machine vision composed of an image sensor and processor suffers from high latency large power consumption due physically separated sensing processing. A neuromorphic system with brain-inspired visual perception provides a promising solution the problem. Here we propose demonstrate prototype by networking retinomorphic memristive crossbar. We fabricate using WSe2/h-BN/Al2O3 van der Waals heterostructures gate-tunable photoresponses, closely...
Abstract With the outstanding mechanical properties, van der Waals (vdW) materials have attracted extensive attention in research of straintronics past decade. In this perspective, we first review recent progresses with vdW based on three different lattice deformation modes, i.e., in-plane strain, out-of-plane and heterostrain. Then discuss current technique challenges field, finally provide our perspectives future directions for both fundamental physics electronic applications.
With the rising demand for information security, there has been a surge of interest in harnessing intrinsic physical properties device designing secure logic circuit. Here we provide an innovative approach to realize optoelectronic circuit based on nonvolatile van der Waals (vdW) heterostructure phototransistors. The phototransistors comprising WSe2 and h-BN flakes exhibit electrical tunability conductance under cooperative operations light stimulus. This intriguing feature allows...
Parallel perception of visual motion is crucial significance to the development an intelligent machine vision system. However, implementing in-sensor parallel using conventional complementary metal-oxide semiconductor technology challenging, because temporal and spatial information embedded in cannot be simultaneously encoded perceived at sensory level. Here, we demonstrate diverse modes sensor level by exploiting light-tunable memory matrix a van der Waals (vdW) heterostructure array. The...
Abstract Over the years, great efforts have been devoted in introducing a sizable and tunable band gap graphene for its potential application next‐generation electronic devices. The primary challenge modulating this has absence of direct method observing changes momentum space. In study, advanced spatial‐ angle‐resolved photoemission spectroscopy technique is employed to directly visualize formation bilayer graphene, modulated by both displacement fields moiré potentials. field via situ...
Hollow nanotubes comprised of In2O3 and Ga2O3 have been successfully synthesized for the first time via sol–gel chemistry porous alumina templating thereby providing a new morphology these important semiconductor oxides. The are characterized by SEM, XRD XPS, length (typically tens microns) outside inside diameter (of order 100 nm) can be varied selecting template dimensions sol immersion time. This with large surface area may in applications ranging from gas sensors to optoelectronic nanodevices.
Abstract Flexible electronics are expected to play a key role in connecting human lives with versatile smart electronic devices due their adaptability different shapes, surfaces, and even the body. However, heat management issues found most flexible low thermal conductivity of conventional plastic or paper substrates become significant for large-scale integration high-temperature applications. In this study, we employed high nanopaper composed two-dimensional (2D) hexagonal boron nitride...
Abstract Two dimensional layered organic-inorganic hybrid perovskites (2D perovskites) are potential candidates for next generation photovoltaic device. Especially, the out-of-plane surface perpendicular to superlattice plane of 2D (layer-edge surface) has presented several exotic behaviors, such as layer-edge states which found be crucial improving efficiency perovskite solar cells. However, fundamental research on transport properties is still absent. In this report, we observe electronic...
The field of perovskite heterostructures (PHSs) has seen considerable progress in recent years. Particularly, these structures have attracted interest because their remarkably efficient photovoltaic and optoelectronic properties. This paper reviews a wide range potential applications PHSs. review begins by introducing summarizing the fundamental theory PHSs pays special attention to basic optical electronic properties are subsequently described detail, with an emphasis on approaches that...
Significance Recent intensive investigations have revealed unique electronic transport properties in solids hosting Weyl fermions, which were originally proposed high-energy physics. Up to now, the discovered systems been limited semimetal compounds. Here we demonstrate that elemental semiconductor tellurium is a semiconductor, with typical signatures, including negative longitudinal magnetoresistance, planar Hall effect, as well intriguing logarithmically periodic magneto-oscillations...
Interlayer interaction could substantially affect the electrical transport in transition metal dichalcogenides, serving as an effective way to control device performance. However, it is still challenging utilize interlayer weakly interlayer-coupled materials such pristine MoS2 realize layer-dependent tunable behavior. Here, we demonstrate that, by substitutional doping of vanadium atoms Mo sites lattice, vanadium-doped monolayer exhibits ambipolar field effect characteristic, while its...
Elemental tellurium, conventionally recognized as a narrow bandgap semiconductor, has recently aroused research interests for exploiting Weyl physics. Chirality is unique feature of cones and can support helicity-dependent photocurrent generation, known circular photogalvanic effect. Here, we report effect with opposite signs at two different mid-infrared wavelengths which provides evidence Weyl-related optical responses. These correspond to critical transitions relating the bands sign...