21 Result(s)
within
**aoLi Zhu
Materials Science
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Article
An effective defect engineering strategy for giant photoluminescence enhancement of MoS2 monolayers
Two-dimensional (2D) transition metal dichalcogenide (TMDC) materials are considered as promising candidates to extend Moore’s Law. However, the low photoluminescence (PL) quantum yield due to the inevitable d...
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Article
Epitaxial van der Waals contacts for low schottky barrier MoS2 field effect transistors
Small contact resistance and low Schottky barrier height (SBH) are the keys to energy-efficient electronics and optoelectronics. Two-dimensional (2D) semiconductors-based field effect transistors (FETs), holdi...
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Article
Controlled synthesis of ultrathin metallic MoO2 nanosheets for van der Waals contact
Van der Waals contact through assembly of two-dimensional (2D) semiconductors with metallic materials by van der Waals force is considered as one of the most promising methods to solve the contact problem in 2...
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Article
Defect-induced distinct exciton-exciton interactions in WS2 monolayers
The optoelectronic properties of atomically thin transition metal dichalcogenides (TMDs) are largely influenced by defect populations (DPs). In this work, we fabricate WS2 monolayers with different DPs by varying...
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Article
Plasmonically engineered light-matter interactions in Au-nanoparticle/MoS2 heterostructures for artificial optoelectronic synapse
Optoelectronic synaptic elements are emerging functional devices for the vigorous development of advanced neuromorphic computing technology in the post-Moore era. However, optoelectronic devices based on trans...
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Article
Crystal structure, dielectric, and ferroelectric characteristics of zirconate tantalate ceramics with tungsten bronze structure
In the present work, dielectric and ferroelectric characteristics of Ba6−pRpZr2+pTa8−pO30 (p = 1, 2, R = La, Nd, Sm) tungsten bronze ceramics were investigated systematically, and the effects of Zr4+ and Ta4+ occ...
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Article
Record high photoresponse observed in CdS-black phosphorous van der Waals heterojunction photodiode
Two-dimensional (2D) materials have recently received great attention for their atomic thin thickness and thus derived outstanding electrical, optical and optoelectronic properties. Moreover, the dangling-bond...
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Article
Visualized and cascade-enhanced gene silencing by smart DNAzyme-graphene nanocomplex
BCL-2 gene as well as its products is recognized as a promising target for the molecular targeted therapy of tumors. However, due to certain defense measures of tumor cells, the therapeutic effect based on the...
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Article
Vapor growth of WSe2/WS2 heterostructures with stacking dependent optical properties
Two-dimensional (2D) vertically stacked heterostructures based on layered transition-metal dichalcogenides (TMDCs) have remarkable potential in future applications due to their rich interlayer related properti...
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Article
Dual-enzyme-propelled unbounded DNA walking nanomachine for intracellular imaging of lowly expressed microRNA
Despite the progress on the analysis of miRNA either in vitro or in vivo, intracellular imaging of lowly expressed microRNA remains a challenge. Here we develop a novel dual–enzyme–propelled DNA walking nanomachi...
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Article
Cesium lead halide perovskite triangular nanorods as high-gain medium and effective cavities for multiphoton-pumped lasing
High-performance multiphoton-pumped lasers based on cesium lead halide perovskite nanostructures are promising for nonlinear optics and practical frequency upconversion devices in integrated photonics. However...
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Article
Fabrication of nanozyme@DNA hydrogel and its application in biomedical analysis
Nanozymes have received great attention owing to the advantages of easy preparation and low cost. Unlike natural enzymes that readily adapt to physiological environments, artificial nanozymes are apt to passiv...
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Article
Lateral composition-graded semiconductor nanoribbons for multi-color nanolasers
Low-dimensional semiconductor nanostructures have attracted much interest for applications in integrated photonic and optoelectronic devices. Band gap engineering within single semiconductor nanoribbons helps ...
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Article
A green method of staining DNA in polyacrylamide gel electrophoresis based on fluorescent copper nanoclusters synthesized in situ
The safety of nucleic acid staining dyes has long been recognized to be a problem. Extensive efforts have been made to search for alternatives to the most popular but toxic staining dye, ethidium bromide (EtBr...
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Article
Superparamagnetic MFe2O4 (M = Ni, Co, Zn, Mn) nanoparticles: synthesis, characterization, induction heating and cell viability studies for cancer hyperthermia applications
Superparamagnetic nanoferrites are prepared by simple and one step refluxing in polyol synthesis. The ferrite nanoparticles prepared by this method exhibit particle sizes below 10 nm and high degree of crystal...
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Article
Synthesis and Properties of Monodisperse Superparamagnetic Mg0.8Mn0.2Fe2O4 Nanoparticles Using Polyol Reflux Method
Superparamagnetic monodisperse Mg0.8Mn0.2Fe2O4 nanoparticles have been successfully synthesized in liquid polyol at elevated temperature of 200 °C. Diethylene glycol (DEG) used here plays dual role in synthesis a...
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Article
A chemical approach to accurately characterize the coverage rate of gold nanoparticles
Gold nanoparticles (AuNPs) have been widely used in many areas, and the nanoparticles usually have to be functionalized with some molecules before use. However, the information about the characterization of th...
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Article
Open AccessPreparation of hollow TiO2 nanoparticles through TiO2 deposition on polystyrene latex particles and characterizations of their structure and photocatalytic activity
In a mixed solvent of water and ethanol, polystyrene/titanium dioxide (PSt/TiO2) composite particles of core-shell structure were prepared by hydrolysis of tetrabutyl titanate in the presence of cationic PSt part...
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Article
Open AccessPreparation and characterization of nanosized P(NIPAM-MBA) hydrogel particles and adsorption of bovine serum albumin on their surface
Thermosensitive polymer hydrogel particles with size varying from 480 to 620 nm were prepared through precipitation copolymerization of N-isopropylacrylamide with N,N′-methylenebisacrylamide (MBA) in water with a...
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Article
Plasmonic properties of two-dimensional metallic nanoholes fabricated by focused ion beam lithography
Plasmonic metallic nanoholes are widely used to focus or image in the nanoscale field. In this article, we present the results of the design, fabrication, and plasmonic properties of a two-dimensional metallic...
