Search results for: Naigen Zhou

Items from 1 to 20 out of 27 results

article

In Situ Formation of Heterojunction in Composite Lithium Anode Facilitates Fast and Uniform Interfacial Ion Transport

Shan Fang, Huasong Wang, Shangquan Zhao, Miaomiao Yu, more

Small > 20 > 34 > n/a - n/a

Lithium metal is a highly promising anode for next‐generation high‐energy‐density rechargeable batteries. Nevertheless, its practical application faces challenges due to the uncontrolled lithium dendrites growth and infinite volumetric expansion during repetitive cycling. Herein, a composite lithium anode is designed by mechanically rolling and pressing a cerium oxide‐coated carbon textile with lithium...

article

Preparation of carbon‐coated Fe₂O₃@Ti₃C₂T_x composites by mussel‐like modifications as high‐performance anodes for lithium‐ion batteries

Shaoqing Li, Yong Ye, Xiang Liu, Xuerui Yang, more

Chemistry – A European Journal > 30 > 10 > n/a - n/a

Fe₂O₃ with high theoretical capacity (1007 mA h g⁻¹) and low cost is a potential anode material for lithium‐ion batteries (LIBs), but its practical application is restricted by its low electrical conductivity and large volume changes during lithiation/delithiation. To solve these problems, Fe₂O₃@Ti₃C₂T_x composites were synthesized by a mussel‐like modification method, which relies on the self‐polymerization...

article

Unveiling the amorphization of sodalite topology zeolitic imidazolate frameworks and zeolites by pressure and stress

Neng Li, Zuhao Shi, Shiming Zhai, Naigen Zhou, more

Journal of the American Ceramic Society > 106 > 10 > 6117 - 6129

As a flexible porous material, the amorphous behavior of zeolitic imidazolate framework‐8 (ZIF‐8) has garnered considerable interest. However, the association between its strain behavior and topology has not yet been exhaustively studied computationally. We perform molecular dynamic simulations on both ZIF‐8 and its topological silicate isomer sodalite (SOD) to investigate the pressure‐induced development...

article

A Study on Characterization and Prevention of Shadows in Cast Mono‐Crystalline Silicon Ingots

Naigen Zhou, Shilong Liu, Panbing Zhou, Qi Lei, more

Crystal Research and Technology > 57 > 4 > n/a - n/a

Dark shadow areas often appear in infrared images of cast monocrystalline silicon (CMC‐Si) ingots. In this work, the formation of shadow and how to avoid it by optimizing the growth process are analyzed. The analysis of scanning electron microscopy & energy dispersive spectroscopy show that the shadows in CMC‐Si are caused by dispersed SiC particles. These particles will further induce a great...

article

Fabrication of β cyclodextrin containing AIE-active polymeric composites through formation of dynamic phenylboronic borate and their theranostic applications

Hongye Huang, Meiying Liu, Junyu Chen, Liucheng Mao, more

Cellulose > 2019 > 26 > 16 > 8829-8841

Since the first discovery by Tang in 2001, aggregation-induced emission (AIE) phenomenon has attracted considerable research interest in various fields. In this contribution, AIE-active composites (named as An-HPG-β-CD) have been fabricated via conjugation of AIE-active compound An-B(OH)₂ and hyperbranched polyglycerol functionalized β cyclodextrin (HPG-β-CD) based on dynamic phenyl borate for the...

article

Frontispiece: Insights into the Electrocatalytic Hydrogen Evolution Reaction Mechanism on Two‐Dimensional Transition‐Metal Carbonitrides (MXene)

Bin Huang, Naigen Zhou, Xingzhu Chen, Wee‐Jun Ong, more

Chemistry – A European Journal > 24 > 69 > n/a - n/a

Developing highly active, non‐noble‐metal H₂‐evolution catalysts is appealing yet still remains a great challenge. In this work, high quality transition‐metal carbonitrides M₃CN (MXene) are investigated using well‐defined density functional theory (DFT) calculations. The presented in‐depth investigations for transition‐metal carbonitrides (MXene) opens up new designs for robust metal carbonitrides...

article

Insights into the Electrocatalytic Hydrogen Evolution Reaction Mechanism on Two‐Dimensional Transition‐Metal Carbonitrides (MXene)

Bin Huang, Naigen Zhou, Xingzhu Chen, Wee‐Jun Ong, more

Chemistry – A European Journal > 24 > 69 > 18479 - 18486

Developing highly active, non‐noble‐metal H₂‐evolution catalysts is appealing yet still remains a great challenge in the field of electrocatalytic and photocatalytic H₂ production. In this work, high quality transition‐metal carbonitrides M₃CN (MXene) are investigated using well‐defined density functional theory (DFT) calculations. The structural configurations, H‐adsorption free energy (ΔG_H) and...

article

A facile strategy for preparation of magnetic graphene oxide composites and their potential for environmental adsorption

Yan Liu, Hongye Huang, Defu Gan, Linru Guo, more

Ceramics International > 2018 > 44 > 15 > 18571- 18577

Over the past decades, graphene oxide (GO) and its composites with organic and inorganic components have gradually become one of the most popular carbon nanomaterials, on account of multitudinous advantages, including great conductivity, excellent thermal stability and large specific surface area. In particular, the magnetic GO based composites have been extensively investigated for various applications...

article

Fabrication and characterization of hyperbranched polyglycerol modified carbon nanotubes through the host-guest interactions

Hongye Huang, Meiying Liu, Ruming Jiang, Junyu Chen, more

Materials Science and Engineering: C > 2018 > 91 > C > 458-465

Carbon nanotubes (CNTs) are novel carbon composites that have received extensive research attention for biomedical applications thanks to their excellent cell membrane penetration capability and large specific surface areas. Nevertheless, the poor dispersibility in aqueous solution still perplexes the biomedical applications of CNTs. Although, there are many researched about that modify hydrophilic...

article

A novel thiol-ene click reaction for preparation of graphene quantum dots and their potential for fluorescence imaging

Hongye Huang, Meiying Liu, Xun Tuo, Junyu Chen, more

Materials Science and Engineering: C > 2018 > 91 > C > 631-637

Graphene quantum dots (GQDs), as a kind of carbon dots with the structure of graphene, possess fascinating properties of both carbon dots and graphene have attracted increasing attention for various applications especially in the biomedical fields. It is therefore, many methods for preparation of GQDs have been developed over the last decade. However, most of the previous reports are required tedious...

article

Formation of Epitaxial Heavy-doped Silicon Films by PECVD Method

Haibin Huang, Zhihao Yue, Yuping He, Jiren Yuan, more

Journal of Wuhan University of Technology-Mater. Sci. Ed. > 2018 > 33 > 3 > 585-588

Plasma-enhanced CVD (PECVD) epitaxy at 200 °C was used to deposit heavy doped n-type silicon films. Post-annealing by rapid thermal processing was applied to improve the properties of the epitaxial layer. By analyzing the Raman spectra and the imaginary part of the dielectric constant spectra of the samples, it was found that high-quality heavy-doped epitaxial n-type silicon layer can be obtained...

article

Facile modification of nanodiamonds with hyperbranched polymers based on supramolecular chemistry and their potential for drug delivery

Hongye Huang, Meiying Liu, Ruming Jiang, Junyu Chen, more

Journal of Colloid and Interface Science > 2018 > 513 > C > 198-204

Due to their excellent chemical stability and remarkable biocompatibility, nanodiamonds (NDs) have received widespread research attention by the biomedical field. The excellent water dispersibility of NDs has significant importance for biomedical applications. Therefore, surface modification of NDs with hydrophilic polymers has been extensively investigated over the past few decades. In this study,...

article

Improving the efficiency and environmental stability of inverted planar perovskite solar cells via silver-doped nickel oxide hole-transporting layer

Ying Wei, Kai Yao, Xiaofeng Wang, Yihua Jiang, more

Applied Surface Science > 2018 > 427 > PB > 782-790

In this paper, we demonstrate the high-performance inverted planar heterojunction perovskite solar cells (PeSCs) based on the novel inorganic hole-transporting layer (HTL) of silver (Ag)-doped NiO_x (Ag:NiO_x). Density-functional theory (DFT) calculation reveals that Ag prefers to occupy the substitutional Ni site (Ag_Ni) and behaves as an acceptor in NiO lattice. Compared with the pristine NiO_x films,...

article

Intermediate band materials obtained by rapid thermal process of Co-implanted silicon

Jiren Yuan, Haibin Huang, Xinhua Deng, Mingang Gong, more

Materials Letters > 2017 > 209 > C > 522-524

The intermediate band solar cell (IBSC) is a kind of novel photovoltaic device with very high efficiency limit. The intermediate band (IB) material is a key factor for fabricating high-performance IBSC. We explore to prepare IB material by Co implantation in silicon followed by a rapid thermal process (RTP). The results show that an IB is successfully formed in Si layer. The IB is located at about...

article

Molecular dynamics study about the effect of substrate temperature on a-Si:H structure

Yaorong Luo, Hongyong Gong, Naigen Zhou, Haibin Huang, more

Applied Physics A > 2018 > 124 > 1 > 1-9

Molecular dynamics simulation of the microstructure of hydrogenated amorphous silicon (a-Si:H) thin film with different substrate temperatures has been performed based on the Tersoff potential. The results showed that: the silicon thin film maintained amorphous structure in the substrate temperature range from 200 to 1000 K; high substrate temperature could smooth the surface. The first neighbour...

article

Structure Sorting of Large‐Diameter Carbon Nanotubes by NaOH Tuning the Interactions between Nanotubes and Gel

Dehua Yang, Jinwen Hu, Huaping Liu, Shilong Li, more

Advanced Functional Materials > 27 > 40 > n/a - n/a

The structure separation of synthetic single‐wall carbon nanotube (SWCNT) mixture species with diameters larger than 1.2 nm still remains a challenge. Here, an NaOH‐assisted gel chromatography method is used for the structure separation of the SWCNT mixture with a diameter range of 1.2–1.7 nm, in which NaOH is used to tune the interaction between distinct (n, m) SWCNTs and gel. Incrementally increasing...

article

The influence of annealing temperature upon the structure of a-Si:H/c-Si thin films

Yaorong Luo, Xiaoxiao Sui, Yuping He, Haibin Huang, more

Journal of Non-Crystalline Solids > 2017 > 471 > C > 379-383

Molecular dynamics simulations of a-Si:H/c-Si thin films annealing at different temperature have been carried out. An extended Tersoff potential is used to describe the Si-Si, Si–H and H–H atomic interactions. The results showed that, annealing treatment makes the structure of a-Si:H films more compact and orderly. The total hydrogen content decreasing persistently as the annealing temperature increasing...

article

a-SiOx:H passivation layers for Cz-Si wafer deposited by hot wire chemical vapor deposition

Yuping He, Haibin Huang, Lang Zhou, Zhihao Yue, more

Materials Science in Semiconductor Processing > 2017 > 61 > C > 1-4

In order to get the high photoelectric conversion efficiency a-Si:H/c-Si solar cells, high quality intrinsic hydrogenated passivation layer between the a-Si:H emitter layer and the c-Si wafer is necessary. In this work, hot wire chemical vapor deposition (HWCVD) is used to deposite intrinsic oxygen-doped hydrogenated amorphous silicon (a-SiO_x:H) and hydrogenated amorphous silicon (a-Si:H) films as...

article

Design of a flexure composite with large flexoelectricity

Meiqian Wan, Zehui Yong, Wenbin Huang, Shaohua Zhang, more

Journal of Materials Science: Materials in Electronics > 2017 > 28 > 9 > 6505-6511

Flexoelectric effect has attained considerable interests owing to its potential sensing and actuating application. However, even highly developed in the past few years, the present flexoelectricity of materials are still difficult to satisfy the standard for device applications. Designing new flexoelectric device has become a fundamental issue in this newly arising field. In this paper, we systematically...

article

A molecular dynamics study of nucleation of dislocation in growth of silicon from melt

Naigen Zhou, Xiaoyuan Wu, Xiuqin Wei, Lang Zhou, more

Journal of Crystal Growth > 2016 > 443 > C > 15-19

Molecular dynamics (MD) simulations of growths of crystalline silicon from the melt along 〈100〉, 〈110〉 and 〈112〉 directions have been carried out. Tersoff potential is employed for computing atomic interaction. The results show that in the growths along 〈100〉, 〈110〉, no dislocation was formed, while in the growth along 〈112〉, more than one dislocations formed. The dislocation formed is identified...

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INFONA - science communication portal

Search results for: Naigen Zhou

In Situ Formation of Heterojunction in Composite Lithium Anode Facilitates Fast and Uniform Interfacial Ion Transport

Preparation of carbon‐coated Fe₂O₃@Ti₃C₂T_x composites by mussel‐like modifications as high‐performance anodes for lithium‐ion batteries

Unveiling the amorphization of sodalite topology zeolitic imidazolate frameworks and zeolites by pressure and stress

A Study on Characterization and Prevention of Shadows in Cast Mono‐Crystalline Silicon Ingots

Fabrication of β cyclodextrin containing AIE-active polymeric composites through formation of dynamic phenylboronic borate and their theranostic applications

Frontispiece: Insights into the Electrocatalytic Hydrogen Evolution Reaction Mechanism on Two‐Dimensional Transition‐Metal Carbonitrides (MXene)

Insights into the Electrocatalytic Hydrogen Evolution Reaction Mechanism on Two‐Dimensional Transition‐Metal Carbonitrides (MXene)

A facile strategy for preparation of magnetic graphene oxide composites and their potential for environmental adsorption

Fabrication and characterization of hyperbranched polyglycerol modified carbon nanotubes through the host-guest interactions

A novel thiol-ene click reaction for preparation of graphene quantum dots and their potential for fluorescence imaging

Formation of Epitaxial Heavy-doped Silicon Films by PECVD Method

Facile modification of nanodiamonds with hyperbranched polymers based on supramolecular chemistry and their potential for drug delivery

Improving the efficiency and environmental stability of inverted planar perovskite solar cells via silver-doped nickel oxide hole-transporting layer

Intermediate band materials obtained by rapid thermal process of Co-implanted silicon

Molecular dynamics study about the effect of substrate temperature on a-Si:H structure

Structure Sorting of Large‐Diameter Carbon Nanotubes by NaOH Tuning the Interactions between Nanotubes and Gel

The influence of annealing temperature upon the structure of a-Si:H/c-Si thin films

a-SiOx:H passivation layers for Cz-Si wafer deposited by hot wire chemical vapor deposition

Design of a flexure composite with large flexoelectricity

A molecular dynamics study of nucleation of dislocation in growth of silicon from melt

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