41 Result(s)
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Article
Shuyun Zhou
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Growth of large scale PtTe, PtTe2 and PtSe2 films on a wide range of substrates
1T phase of transition metal dichalcogenides (TMDCs) formed by group 10 transition metals (e.g. Pt, Pd) have attracted increasing interests due to their novel properties and potential device applications. Synt...
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Open AccessUltra-narrow-bandwidth graphene quantum dots for superresolved spectral and spatial sensing
Narrow-bandwidth luminescent materials are already used in optoelectronic devices, superresolution, lasers, imaging, and sensing. The new-generation carbon fluorescence nanomaterials—carbon dots—have attracted...
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Open AccessAutoencoder based blind source separation for photoacoustic resolution enhancement
Photoacoustics is a promising technique for in-depth imaging of biological tissues. However, the lateral resolution of photoacoustic imaging is limited by size of the optical excitation spot, and therefore by ...
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Open AccessInterlayer quantum transport in Dirac semimetal BaGa2
The quantum limit is quite easy to achieve once the band crossing exists exactly at the Fermi level (EF) in topological semimetals. In multilayered Dirac fermion systems, the density of Dirac fermions on the zero...
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Black phosphorous for pseudospintronics
Black phosphorus is reported to be a bipolar pseudospin semiconductor, exhibiting a net pseudospin polarization with opposite polarization directions for the conduction and valence bands. These properties make...
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Disorder-induced multifractal superconductivity in monolayer niobium dichalcogenides
The interplay between disorder and superconductivity is a subtle and fascinating phenomenon in quantum many-body physics. Conventional superconductors are insensitive to dilute non-magnetic impurities, known a...
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Pressure-induced Lifshitz transition in the type II Dirac semimetal PtTe2
Numerous exotic properties have been discovered in Dirac Semimetals (DSMs) and Weyl Semimetals (WSMs). In a given DSM/ WSM, the Dirac/Weyl nodes usually coexist with other bulk states, making their respective ...
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Open AccessConversion of Multi-layered MoTe2 Transistor Between P-Type and N-Type and Their Use in Inverter
Both p-type and n-type MoTe2 transistors are needed to fabricate complementary electronic and optoelectronic devices. In this study, we fabricate air-stable p-type multi-layered MoTe2 transistors using Au as elec...
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Broadband optical limiting and nonlinear optical graphene oxide co-polymerization Ormosil glasses
A class of graphene oxide (GO) Ormosil glasses with excellent nonlinear optical properties were made with sol-gel method. The as-prepared GO Ormosil glasses were highly transparent in visible and near-infrared...
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Multimodal bioimaging based on gold nanorod and carbon dot nanohybrids as a novel tool for atherosclerosis detection
Advanced biocompatible and robust platforms equipped with diverse properties are highly required in biomedical imaging applications for the early detection of atherosclerotic vascular disease and cancers. Desi...
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Open AccessPronounced Photovoltaic Response from Multi-layered MoTe2 Phototransistor with Asymmetric Contact Form
In this study, we fabricate air-stable p-type multi-layered MoTe2 phototransistor using Au as electrodes, which shows pronounced photovoltaic response in off-state with asymmetric contact form. By analyzing the s...
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Open AccessLorentz-violating type-II Dirac fermions in transition metal dichalcogenide PtTe2
Topological semimetals have recently attracted extensive research interests as host materials to condensed matter physics counterparts of Dirac and Weyl fermions originally proposed in high energy physics. Alt...
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Electric-field control of tri-state phase transformation with a selective dual-ion switch
Materials are described here that can change their crystalline phase in response to the electrically controlled insertion or extraction of oxygen and hydrogen ions, giving rise to three distinct phases with di...
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Open AccessDirect observation of spin-layer locking by local Rashba effect in monolayer semiconducting PtSe2 film
The generally accepted view that spin polarization in non-magnetic solids is induced by the asymmetry of the global crystal space group has limited the search for spintronics materials mainly to non-centrosymm...
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Open AccessRaman signatures of inversion symmetry breaking and structural phase transition in type-II Weyl semimetal MoTe2
Transition metal dichalcogenide MoTe2 is an important candidate for realizing the newly predicted type-II Weyl fermions, for which the breaking of the inversion symmetry is a prerequisite. Here we present direct ...
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Experimental observation of topological Fermi arcs in type-II Weyl semimetal MoTe2
Observations of topological surface states provide strong evidence that MoTe2 is a type-II Weyl semimetal, hosting Weyl fermions that have no counterpart in high-energy physics.
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Gaps induced by inversion symmetry breaking and second-generation Dirac cones in graphene/hexagonal boron nitride
Images of the second-generation Dirac cones that form when graphene is placed on hexagonal boron nitride show the potential of using superlattices to engineer the electronic band structure of van der Waals het...
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Fully gapped topological surface states in Bi2Se3 films induced by a d-wave high-temperature superconductor
By growing a topological insulator on top of a high-temperature superconducting substrate it is possible to induce superconductivity in the surface states of the topological insulator. Moreover, the pairing sy...
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Open AccessPreparation of SnS2 colloidal quantum dots and their application in organic/inorganic hybrid solar cells
Dispersive SnS2 colloidal quantum dots have been synthesized via hot-injection method. Hybrid photovoltaic devices based on blends of a conjugated polymer poly[2-methoxy-5-(3",7"dimethyloctyloxy)-1,4-phenylenevin...
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Two-dimensional (polyacrylamide) gel electrophoresis analysis of apoptosis induced by harringtonine in K562 cells
The anti-tumor drug, harringtonine (HT), has been extensively used with satisfactory results in the treatment of acute or chronic myeloid leukemia. Previous studies have shown that the anti-tumor activity of t...
