Biyuan Zheng
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View article: Preparation and Performance of Phthalocyanine @ Copper Iodide Cluster Nanoparticles for X-Ray-Induced Photodynamic Therapy
Preparation and Performance of Phthalocyanine @ Copper Iodide Cluster Nanoparticles for X-Ray-Induced Photodynamic Therapy Open
The efficacy of X-ray-induced photodynamic therapy (X-PDT) for deep tumors is often hindered by conventional scintillators, typically rare-earth nanoparticles plagued by long-term toxicity and suboptimal scintillation yields. Here, we intr…
View article: 2D Cd metal contacts via low-temperature van der Waals epitaxy towards high-performance 2D transistors
2D Cd metal contacts via low-temperature van der Waals epitaxy towards high-performance 2D transistors Open
View article: Phthalocyanine aggregates as semiconductor-like photocatalysts for hypoxic-tumor photodynamic immunotherapy
Phthalocyanine aggregates as semiconductor-like photocatalysts for hypoxic-tumor photodynamic immunotherapy Open
Photodynamic immunotherapy (PIT) has emerged as a promising approach for efficient eradication of primary tumors and inhibition of tumor metastasis. However, most of photosensitizers (PSs) for PIT exhibit notable oxygen dependence. Herein,…
View article: Phthalocyanine-Based Nanosensitizers for Enhanced Sonodynamic Therapy Activity of Hypoxic Tumor with Dual Apoptosis/Ferroptosis Pathways
Phthalocyanine-Based Nanosensitizers for Enhanced Sonodynamic Therapy Activity of Hypoxic Tumor with Dual Apoptosis/Ferroptosis Pathways Open
View article: High Strain Engineering of a Suspended WSSe Monolayer Membrane by Indentation and Measured by Tip‐Enhanced Photoluminescence
High Strain Engineering of a Suspended WSSe Monolayer Membrane by Indentation and Measured by Tip‐Enhanced Photoluminescence Open
Straintronics involves the manipulation and regulation of the electronic characteristics of 2D materials through the use of macro‐ and nano‐scale strain engineering. In this study, an atomic force microscope (AFM) coupled with an optical s…
View article: Phthalocyanine Aggregates as “Semiconductor-like” Photocatalysts for Hypoxic-Tumor Photodynamic Immunotherapy
Phthalocyanine Aggregates as “Semiconductor-like” Photocatalysts for Hypoxic-Tumor Photodynamic Immunotherapy Open
Photodynamic immunotherapy (PIT) has emerged as a promising approach for efficient eradication of primary tumors and inhibition of tumor metastasis. However, most of photosensitizers (PSs) for PIT exhibit notable oxygen dependence. Herein,…
View article: High Strain Engineering of a Suspended WSSe Monolayer Membrane by Indentation and Measured by Tip-enhanced Photoluminescence
High Strain Engineering of a Suspended WSSe Monolayer Membrane by Indentation and Measured by Tip-enhanced Photoluminescence Open
Straintronics involves the manipulation and regulation of the electronic characteristics of 2D materials through the use of macro- and nano-scale strain engineering. In this study, we utilized an atomic force microscope (AFM) coupled with …
View article: Vapor growth of V-doped MoS2 monolayers with enhanced B-exciton emission and broad spectral response
Vapor growth of V-doped MoS2 monolayers with enhanced B-exciton emission and broad spectral response Open
Dynamically engineering the optical and electrical properties in two-dimensional (2D) materials is of great significance for designing the related functions and applications. The introduction of foreign-atoms has previously been proven to …
View article: Self‐Powered Perovskite Photodetector Arrays with Asymmetric Contacts for Imaging Applications
Self‐Powered Perovskite Photodetector Arrays with Asymmetric Contacts for Imaging Applications Open
Designing photodetectors (PDs) with fast response and low power consumption is important for the realization of photoelectric conversion in photoelectric integrated systems. The emerging metal halide perovskite is proven to be a promising …
View article: A Sulfur-Bridging Sulfonate-Modified Zinc(II) Phthalocyanine Nanoliposome Possessing Hybrid Type I and Type II Photoreactions with Efficient Photodynamic Anticancer Effects
A Sulfur-Bridging Sulfonate-Modified Zinc(II) Phthalocyanine Nanoliposome Possessing Hybrid Type I and Type II Photoreactions with Efficient Photodynamic Anticancer Effects Open
Phthalocyanines are potentially promising photosensitizers (PSs) for photodynamic therapy (PDT), but the inherent defects such as aggregation-caused quenching effects and non-specific toxicity severely hinder their further application in P…
View article: Optical synaptic devices with ultra-low power consumption for neuromorphic computing
Optical synaptic devices with ultra-low power consumption for neuromorphic computing Open
Brain-inspired neuromorphic computing, featured by parallel computing, is considered as one of the most energy-efficient and time-saving architectures for massive data computing. However, photonic synapse, one of the key components, is sti…
View article: Unidirectional Rashba spin splitting in single layer WS<sub>2(1−x)</sub>Se<sub>2x</sub> alloy
Unidirectional Rashba spin splitting in single layer WS<sub>2(1−x)</sub>Se<sub>2x</sub> alloy Open
Atomically thin two-dimensional (2D) layered semiconductors such as transition metal dichalcogenides have attracted considerable attention due to their tunable band gap, intriguing spin-valley physics, piezoelectric effects and potential d…
View article: Van der Waals epitaxial growth and optoelectronics of a vertical MoS2/WSe2 p–n junction
Van der Waals epitaxial growth and optoelectronics of a vertical MoS2/WSe2 p–n junction Open
Two-dimensional (2D) transition metal dichalcogenides (TMDs) have attracted extensive attention due to their unique electronic and optical properties. In particular, TMDs can be flexibly combined to form diverse vertical van der Waals (vdW…
View article: Manipulating Picosecond Photoresponse in van der Waals Heterostructure Photodetectors
Manipulating Picosecond Photoresponse in van der Waals Heterostructure Photodetectors Open
Self‐powered ultrafast 2D photodetectors have demonstrated great potential in imaging, sensing, and communication. Understanding the intrinsic ultrafast charge carrier generation and separation processes is essential for achieving high‐per…
View article: Enhanced Photoluminescence of Wse2/Vocl Bilayer Vertical Heterostructures Synthesized by Van Der Waals Epitaxial Growth Method
Enhanced Photoluminescence of Wse2/Vocl Bilayer Vertical Heterostructures Synthesized by Van Der Waals Epitaxial Growth Method Open
View article: Non-Equilibrium First-Order Exciton Mott Transition at Monolayer Lateral Heterojunctions Visualized by Ultrafast Microscopy
Non-Equilibrium First-Order Exciton Mott Transition at Monolayer Lateral Heterojunctions Visualized by Ultrafast Microscopy Open
Atomically precise lateral heterojunctions based on transition metal dichalcogenides provide a new platform for exploring exciton Mott transition in one-dimension. To investigate the intrinsically non-equilibrium Mott transition, we employ…
View article: Interlayer exciton formation, relaxation, and transport in TMD van der Waals heterostructures
Interlayer exciton formation, relaxation, and transport in TMD van der Waals heterostructures Open
View article: Indirect to direct band gap crossover in two-dimensional WS2(1−x)Se2x alloys
Indirect to direct band gap crossover in two-dimensional WS2(1−x)Se2x alloys Open
In atomically thin transition metal dichalcogenide semiconductors, there is a crossover from indirect to direct band gap as the thickness drops to one monolayer, which comes with a fast increase of the photoluminescence signal. Here, we sh…
View article: Indirect to direct band gap crossover in two-dimensional WS2(1-x)Se2x\n alloys
Indirect to direct band gap crossover in two-dimensional WS2(1-x)Se2x\n alloys Open
In atomically thin transition metal dichalcogenide semiconductors, there is a\ncrossover from indirect to direct bandgap as the thickness drops to one\nmonolayer, which comes with a fast increase of the photoluminescence signal.\nHere, we …
View article: Record high photoresponse observed in CdS-black phosphorous van der Waals heterojunction photodiode
Record high photoresponse observed in CdS-black phosphorous van der Waals heterojunction photodiode Open
View article: Twist-angle-dependent interlayer exciton diffusion in WS2–WSe2 heterobilayers
Twist-angle-dependent interlayer exciton diffusion in WS2–WSe2 heterobilayers Open
View article: Dual‐channel type tunable field‐effect transistors based on vertical bilayer WS<sub>2(1 − <i>x</i>)</sub>Se<sub>2<i>x</i></sub>/SnS<sub>2</sub> heterostructures
Dual‐channel type tunable field‐effect transistors based on vertical bilayer WS<sub>2(1 − <i>x</i>)</sub>Se<sub>2<i>x</i></sub>/SnS<sub>2</sub> heterostructures Open
Layered semiconductor heterostructures are essential elements in modern electronic and optoelectronic devices. Dynamically engineering the composition of these heterostructures may enable the flexible design of the properties of heterostru…
View article: Anomalous Interlayer Exciton Diffusion in Twist-Angle-Dependent Moiré Potentials of WS$_2$-WSe$_2$ Heterobilayers
Anomalous Interlayer Exciton Diffusion in Twist-Angle-Dependent Moiré Potentials of WS$_2$-WSe$_2$ Heterobilayers Open
The nanoscale periodic potentials introduced by moiré patterns in semiconducting van der Waals (vdW) heterostructures provide a new platform for designing exciton superlattices. To realize these applications, a thorough understanding of th…
View article: Strong interlayer hybridization in the aligned SnS2/WSe2 hetero-bilayer structure
Strong interlayer hybridization in the aligned SnS2/WSe2 hetero-bilayer structure Open
View article: Direct Vapor Growth of 2D Vertical Heterostructures with Tunable Band Alignments and Interfacial Charge Transfer Behaviors
Direct Vapor Growth of 2D Vertical Heterostructures with Tunable Band Alignments and Interfacial Charge Transfer Behaviors Open
2D vertical van der Waals (vdW) heterostructures with atomically sharp interfaces have attracted tremendous interest in 2D photonic and optoelectronic applications. Band alignment engineering in 2D heterostructures provides a perfect platf…
View article: Observation and active control of a collective polariton mode and polaritonic band gap in few-layer WS2 strongly coupled with plasmonic lattices
Observation and active control of a collective polariton mode and polaritonic band gap in few-layer WS2 strongly coupled with plasmonic lattices Open
Two-dimensional semiconductors host excitons with very large oscillator strengths and binding energies due to significantly reduced carrier screening. Two-dimensional semiconductors integrated with optical cavities are emerging as a promis…
View article: Van der Waals epitaxial growth and optoelectronics of large-scale WSe2/SnS2 vertical bilayer p–n junctions
Van der Waals epitaxial growth and optoelectronics of large-scale WSe2/SnS2 vertical bilayer p–n junctions Open
High-quality two-dimensional atomic layered p–n heterostructures are essential for high-performance integrated optoelectronics. The studies to date have been largely limited to exfoliated and restacked flakes, and the controlled growth of …
View article: Understanding the different exciton-plasmon coupling regimes in two-dimensional semiconductors coupled with plasmonic lattices: a combined experimental and unified equations of motion approach
Understanding the different exciton-plasmon coupling regimes in two-dimensional semiconductors coupled with plasmonic lattices: a combined experimental and unified equations of motion approach Open
We study exciton-plasmon coupling in two-dimensional semiconductors coupled with Ag plasmonic lattices via angle-resolved reflectance spectroscopy and by solving the equations of motion (EOMs) in a coupled oscillator model accounting for a…