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Energy band engineering via“Bite”defect located on N=8 armchair graphene nanoribbons

Nano Research 2022年第1期15卷 653-658页

作者： Shijie Sun Yurou Guan Zhenliang Hao zilin ruan Hui Zhang Jianchen Lu Lei Gao Xiaoqing Zuo Jinming Cai Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650000China Faculty of Science Kunming University of Science and TechnologyKunming 650000China

Graphene nanoribbons(GNRs)not only share many superlative properties of graphene but also display an exceptional degree of tunability of their electronic properties.The bandgaps of GNRs depend greatly on their widths,edges,etc.Herein,we report the synthesis path and the physical properties of atomic accuracy staggered narrow N=8 armchair graphene nanoribbons(sn-8AGNR)with alternating"Bite"defects on the opposite side.The intermediate structures in the surface physicochemical reactions from the precursors to the sn-8AGNR are characterized by scanning tunneling microscopy.The electronic properties of the sn-8AGNR are characterized by scanning tunneling spectroscopies and 6//6V mappings.Compared with the perfect N=8 armchair graphene nanoribbons(8AGNR),the sn-8AGNR has a larger bandgap,indicating that the liB\Xen edges can effectively regulate the electronic structures of GNRs.

关键词： graphene nanoribbons(GNRs) scanning tunneling spectroscopy(STS) non-contact atomic force microscopy(NC-AFM) density functional theory(DFT) energy band regulation

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Electronic properties of monolayer copper selenide with one-dimensional moirépatterns

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Frontiers of physics 2023年第1期18卷 133-139页

作者： Gefei Niu Jianchen Lu Jianqun Geng Shicheng Li Hui Zhang Wei Xiong zilin ruan Yong Zhang Boyu Fu Lei Gao Jinming Cai Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China Faculty of Science Kunming University of Science and TechnologyKunming 650500China

Strain engineering is a vital way to manipulate the electronic properties of two-dimensional(2D)materials.As a typical representative of transition metal mono-chalcogenides(TMMs),a honeycomb CuSe monolayer features with one-dimensional(1D)moirépatterns owing to the uniaxial strain along one of three equivalent orientations of Cu(111)substrates.Here,by combining low-temperature scanning tunneling microscopy/spectroscopy(STM/S)experiments and density functional theory(DFT)calculations,we systematically investigate the electronic properties of the strained CuSe monolayer on the Cu(111)substrate.Our results show the semiconducting feature of CuSe monolayer with a band gap of 1.28 eV and the 1D periodical modulation of electronic properties by the 1D moirépatterns.Except for the uniaxially strained CuSe monolayer,we observed domain boundary and line defects in the CuSe monolayer,where the biaxial-strain and strain-free conditions can be investigated respectively.STS measurements for the three different strain regions show that the first peak in conduction band will move downward with the increasing strain.DFT calculations based on the three CuSe atomic models with different strain inside reproduced the peak movement.The present findings not only enrich the fundamental comprehension toward the influence of strain on electronic properties at 2D limit,but also offer the benchmark for the development of 2D semiconductor materials.

关键词： CuSe monolayer scanning tunneling microscopy strain electronic bandgap electronic property

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Chiral structures of 6,12-dibromochrysene on Au(111)and Cu(111)surfaces

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Chinese Chemical Letters 2022年第12期33卷 5142-5146页

作者： Shijie Sun Baijin Li Boyu Fu zilin ruan Hui Zhang Wei Xiong Yong Zhang Gefei Niu Jianchen Lu Xiaoqing Zuo Lei Gao Jinming Cai Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650000China Faculty of Science Kunming University of Science and TechnologyKunming 650000China

Nanoscale low-dimensional chiral architectures are increasingly receiving scientific interest,because of their potential applications in many fields such as chiral recognition,separation and transformation.Using 6,12-dibromochrysene(DBCh),we successfully constructed and characterized the large-area two-dimensional chiral networks on Au(111)and one-dimensional metal-liganded chiral chains on Cu(111)respectively.The reasons and processes of chiral transformation of chiral networks on Au(111)were analyzed.We used scanning tunneling spectroscopy(STS)to analyze the electronic state information of this chiral structure.This work combines scanning tunneling microscopy(STM)with non-contact atomic force microscopy(nc-AFM)techniques to achieve ultra-high-resolution characterization of chiral structures on low-dimensional surfaces,which may be applied to the bond analysis of functional nanofilms.Density functional theory(DFT)was used to simulate the adsorption behavior of the molecular and energy analysis in order to verify the experimental results.

关键词： Scanning tunneling microscope Scanning tunneling spectroscopy Non-contact atomic force microscope Surface chirality Chiral transition

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阳离子黄X-5GL合成工艺优化

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染料与染色 2024年第2期61卷 21-24页

作者：陈庆林杜建国张旭雯阮晨峰余自琳浙江闰土染料有限公司绍兴312300

本文对阳离子黄X-5GL合成工艺进行了优化。以产品纯度、强度以及色光为指标,采用单因素分析的方法分析了重氮反应体系硫酸含量、偶合反应温度、母体转晶温度以及盐析pH对染料的影响,得到了该染料的最佳制备工艺:重氮反应体系硫酸含量9%... 详细信息

本文对阳离子黄X-5GL合成工艺进行了优化。以产品纯度、强度以及色光为指标,采用单因素分析的方法分析了重氮反应体系硫酸含量、偶合反应温度、母体转晶温度以及盐析pH对染料的影响,得到了该染料的最佳制备工艺:重氮反应体系硫酸含量9%,偶合反应温度0℃,母体转晶温度40℃,盐析pH为5,在此条件下得到的阳离子黄X-5GL母体纯度98.94%,强度670%,色光为近似,绿0.05。

关键词：阳离子黄X-5GL 重氮反应偶合反应盐析

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乡村振兴战略下玉林木偶戏的保护与创新发展研究

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文化创新比较研究 2022年第15期6卷 1-4页

作者：谭芳冰阮少逸李姿霖黄惠洁黄园园农晓敏张莹广西大学行健文理学院广西南宁530005

玉林木偶戏是广西非物质文化遗产之一。但近年来,随着社会科学技术的发展,多样化的大众娱乐方式,使得曾经风靡一时的玉林木偶戏,逐渐走向衰落。目前玉林木偶戏面临着观众流失、后继无人等困境。为解决这些问题,需要依托国家政策的扶持,... 详细信息

玉林木偶戏是广西非物质文化遗产之一。但近年来,随着社会科学技术的发展,多样化的大众娱乐方式,使得曾经风靡一时的玉林木偶戏,逐渐走向衰落。目前玉林木偶戏面临着观众流失、后继无人等困境。为解决这些问题,需要依托国家政策的扶持,加大木偶戏的宣传、保护工作。通过新媒体模式对玉林木偶戏进行开发和创新,吸引观众流量,打造特色文化,以此推动玉林木偶戏的传承和发展。

关键词：玉林木偶戏乡村振兴战略困境宣传发展

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