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Aggregation-regulated bioreduction process of graphene oxide by Shewanella bacteria

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Chinese Journal of Chemical Engineering 2024年第5期69卷 56-62页

作者： Kaixin Han yibo zeng Yinghua Lu Ping zeng Liang Shen Department of Chemical and Biochemical Engineering College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen UniversityXiamen 361005China Chinese Research Academy of Environmental Sciences Beijing 100012China

The bioreduction of graphene oxide(GO)using environmentally functional bacteria such as Shewanella represents a green approach to produce reduced graphene oxide(rGO).This process differs from the chemical reduction that involves instantaneous molecular *** bioreduction,the contact of bacterial cells and GO is considered the rate-limiting *** reveal how the bacteria-GO integration regulates rGO production,the comparative experiments of GO and three Shewanella strains were carried ***-transform infrared spectroscopy,X-ray photoelectron spectroscopy,Raman spectroscopy,and atomic force microscopy were used to characterize the reduction degree and the aggregation *** results showed that a spontaneous aggregation of GO and Shewanella into the condensed entity occurred within 36 h.A positive linear correlation was established,linking three indexes of the aggregation potential,the bacterial reduction ability,and the reduction degree(ID/IG)comprehensively.

关键词： Graphene oxide Reduced graphene oxide Bioreduction Aggregation Shewanella

Polymeric architectures of bismuth citrate based on dimeric building blocks

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Science China Chemistry 2010年第10期53卷 2152-2158页

作者： YANG Nan AN Yan CAI JiWen HU LiHong zeng yibo MAO ZongWan CHEN GuanHua SUN HongZhe Department of Chemistry The University of Hong KongHong KongChina School of Chemistry and Chemical Engineering Sun Yat-Sen UniversityGuangzhou 510275China Institute of Marine Materials Science and Engineering Shanghai Maritime UniversityShanghai 201306China School of Pharmaceutical Sciences Sun Yat-Sen UniversityGuangzhou 510080China

Four bismuth complexes, (H2En)[Bi2(cit)2(H2O)4/3]·(H2O)x (1), (H2En)3[Bi2(cit)2Cl4]·(H2O)x (2), (HPy)2[Bi2(cit)2(H2O)8/5]·(H2O)x (3) and (H2En)[Bi2(cit)2](H2O)x (4) [cit = citrate4-; En = ethylenediamine; Py = pyridine] have been synthesized and crystallized. The crystal structures reveal that the basic building blocks in all of these complexes are bismuth citrate dimeric units which combine to form polymeric architectures. The embedded protonated ethylenediamine and pyridine moieties in the polymeric frameworks have been identified by X-ray crystallography and solid-state cross polarization/magic angle spinning (CP/MAS) 13C NMR. Based on the framework of complex 1, a structural model of a clinically used antiulcer drug, ranitidine bismuth citrate (RBC) was generated. The behavior of the protonated amine-bismuth citrate complexes in acidic aqueous solution has been studied by electrospray ionization-mass spectrometry (ESI-MS).

关键词： bismuth citrate polymeric architecture crystal structure solid-state NMR ESI-MS

High-fidelity transfer of area-selective atomic layer deposition grown HfO_(2)through DNA origami-assisted nanolithography

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Nano Research 2022年第6期15卷 5687-5694页

作者： Xiaowan Yuan Daiqin Xiao Wei Yao Zhihao Zhang Lin Yang Liyuan Zhang yibo zeng Jiaqi Liao Shanxiong Luo Chonghao Li Hong Chen Xiangmeng Qu Key Laboratory of Sensing Technology and Biomedical Instruments of Guangdong Province and School of Biomedical Engineering Sun Yat-sen UniversityShenzhen 518107China Pen-Tung Sah Institute of Micro-Nano Science and Technology School of Electronic Science and Engineering(National Model Microelectronics College)Xiamen UniversityXiamen 361005China Harvard John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMA 02138USA Jiujiang Research Institute of Xiamen University Jiujiang 332000China

DNA origami-assisted nanolithography(DOANL)for fabricating custom-designed nanomaterials through pattern transfer from DNA origami to different substrates materials are ***,the pattern's integrity and resolution face considerable challenges due to the uncontrollable growth of the nanomaterials during transformation and the unclear mechanism of ***,we report a DOANL combined with area-selective atomic layer deposition(ALD)strategy for fabricating custom shapes hafnium oxide(HfO2)with the high-fidelity and *** find that the HfO_(2)selectively grows on DNA origami substrates in a hydroxyl-rich area instead of a methyl-rich protective *** with the merit of the area-selective ALD method,theHfO_(2)atom selectively coated on the DNA origami surface,thus,precisely modeling the shapes with high-precision in our study based on the surface groups difference of DNA origami and the naked hexamethyldisilane(HMDS)-treated substrates,which reveal the mechanical of high-fidelity pattern transfer based on *** a result,DNA origami structures can program the shape ofHfO_(2)*** DOANL that is based on the principle of"bottom-up"precision assembly breaks through the shape complexity and high-throughput fabrication limitation of theHfO_(2)nanostructures,including two-and three-dimensional structures,plane and curved structures,monolithic and hollow *** on the"top-down"accurate fabrication principle,the area-selective ALD on methyl-rich protective layer substrates improves the integrity and resolution of the pattern transfer ***,this work provides a general technology for nanofabrication strategy.

关键词： DNA origami masks DNA Origami-assisted nanolithography HfO_(2) area-selective atomic layer deposition

Interaction of La(Ⅲ) Complex of Chrysin with ctDNA

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Interaction of La(Ⅲ) Complex of Chrysin with ctDNA

Polymeric porous framework of a bismuth citrate-based complex:A potential vehicle for drug delivery

甘肃省化学会成立六十周年学术报告会暨二十三届年会

作者： zeng yibo, Tang Ning (Department of Chemistry, Lanzhou University, Lanzhou, 730000, P.R. China)

The design of specific probes for nucleic acid structure through binding studies of organic and inorganic molecuLes with deoxyribonucleic acid (DNA) has been an area of considerable interest. Flavonoids, 2-phenylbenzo-γ-pyrone derivatives are potential antibacterial, anticancer, and antioxidant agents since they stimuLate or inhibit a wide variety of enzyme systems as pharmacological agents. Chrysin is one of

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Chinese Science Bulletin 2011年第3期56卷 354-354页

作者： Nan Yang Yan An JiWen Cai LiHong Hu yibo zeng et al.

铋的趋势聚合多孔的框架基于柠檬酸盐的建筑群：为药交货的潜在的车辆

关键词：枸橼酸铋药物框架输送车高分子复合铋基多孔

基于透明的不同流道宽度微型直接甲醇燃料电池的性能比较与分析

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太阳能学报 2014年第2期35卷 366-372页

作者：曾毅波刘俊陈观生赵祖光郭航厦门大学萨本栋微米纳米科学技术研究院厦门361005

以微型直接甲醇燃料电池(Micro Direct Methanol Fuel Cell,简称μ-DMFC)输出性能为研究对象,首先通过MEMS(Micro-Electro-Mechanical Systems,微机电系统)工艺,分别制作4种透明的不同流道宽度(800、400、200、100μm)的阳极流场板,并进行μ-DMFC的整体封装。而后,选定某一特定流道宽度的μ-DMFC,研究不同甲醇溶液流速对μ-DMFC输出性能的影响。所制作的透明流道可实时观察μ-DMFC内阳极流场板CO2气体的生成。实验结果表明:阳极流场板选用流道宽度为400μm,1mol/L甲醇溶液的流速为1mL/min时,μ-DMFC的输出性能最优,最大输出功率为4.62mW/cm2,最大电流密度为49.11mA/cm2。合理的流道宽度和甲醇流速对于获得最优的μ-DMFC输出性能有重要影响。

关键词： μ-DMFC MEMS 透明流道流道宽度流速

运用研磨和化学机械抛光技术制备高品质的石英薄膜

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传感技术学报 2013年第1期26卷 1-6页

作者：曾毅波刘畅陈观生赵祖光郭航厦门大学萨本栋微米纳米科学技术研究院福建厦门361005 厦门大学机电工程系福建厦门361005

石英薄膜的质量是决定各种石英基底的微纳器件品质高低的关键所在。阐述如何运用研磨和化学机械抛光CMP(Chemical&Mechanical Polishing)技术获得高品质石英薄膜的方法。由于石英属于高硬度材料,选用金刚石研磨液和球墨铸铁研磨盘对石... 详细信息

石英薄膜的质量是决定各种石英基底的微纳器件品质高低的关键所在。阐述如何运用研磨和化学机械抛光CMP(Chemical&Mechanical Polishing)技术获得高品质石英薄膜的方法。由于石英属于高硬度材料,选用金刚石研磨液和球墨铸铁研磨盘对石英衬底进行研磨,以获得较高的研磨速率和较好的研磨后的表面粗糙度。在石英CMP中,采用特殊的"两步抛"工艺,对衬底进行抛光。第一步粗抛抛光液采用金刚石颗粒直径为0.3μm的研磨液与SiO2颗粒直径为50 nm的抛光液相混合,第二步精抛只采用SiO2的抛光液。实验结果表明,采用上述技术,可以获得高品质的石英薄膜,厚度为(25.1±3.2)μm,表面粗糙度约为0.89 nm(RMS)。

关键词：微机电系统MEMS(Micro—Electro—Mechanical Systems) 石英薄膜研磨 CMP

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数字媒体设计在乡村振兴中的应用探究

艺术科技 2024年第8期37卷 144-146页

作者：曾奕博蔡潇上海工程技术大学国际创意设计学院上海201620

目的:党的二十大报告对全面推进乡村振兴作出重要部署,为了更好地推动乡村地区数字化转型,推进数字人文生态在乡村振兴中全面落实。文章针对数字媒体设计在乡村振兴中的应用展开研究。方法:通过对乡村振兴战略的数字化结构进行深入分析... 详细信息

目的:党的二十大报告对全面推进乡村振兴作出重要部署,为了更好地推动乡村地区数字化转型,推进数字人文生态在乡村振兴中全面落实。文章针对数字媒体设计在乡村振兴中的应用展开研究。方法:通过对乡村振兴战略的数字化结构进行深入分析,结合实际的乡村振兴数字媒体设计案例,进一步研究乡村数字化生态建设的未来发展变化,从而推动乡村经济社会数字化发展,实现乡村振兴战略的总目标。结果:数字媒体设计在乡村振兴中扮演着重要角色,其应用涵盖政治、经济、文化及生态等多个方向。在政治方面,依托大数据与云计算,简化行政审批程序,大幅提升了政务服务功能和治理效能;在经济方面,数字媒体设计为乡村带去新的经济增长动能,有效提高了农民的生活水平,增强了农民的幸福感;在文化及生态方面,挖掘乡村地区传统民族文化新的活力,并为其注入新的内涵,吸引更多的人关注,从而推动乡村生态文化建设。结论:在乡村振兴战略背景下,数字媒体设计扮演着重要角色,其可以促进农村全方位、多层次发展,推进乡村文化传播与生态建设,从而促进农村在经济、民生、治理、生态、文明等方面全面现代化,并为面向数字媒介时代打下坚实的基础。

关键词：数字媒体设计乡村振兴数字化技术环境

采用硅和PDMS的堆栈式微型直接甲醇燃料电池的设计和制作

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传感技术学报 2013年第2期26卷 143-149页

作者：曾毅波陈观生赵祖光刘畅刘俊王婷婷郭航厦门大学萨本栋微米纳米科学技术研究院福建厦门361005 厦门大学机电工程系福建厦门361005

在堆栈式微型直接甲醇燃料电池μ-DMFC(Micro-Direct Methanol Fuel Cell)中,为了避免硅基流场板因为封装压力过大而破裂,采用了硅和PDMS(Polydimethylsiloxane,聚二甲基硅氧烷)材料分别制作阳极和阴极流场板。首先,采用微机电系统MEMS(... 详细信息

在堆栈式微型直接甲醇燃料电池μ-DMFC(Micro-Direct Methanol Fuel Cell)中,为了避免硅基流场板因为封装压力过大而破裂,采用了硅和PDMS(Polydimethylsiloxane,聚二甲基硅氧烷)材料分别制作阳极和阴极流场板。首先,采用微机电系统MEMS(Micro-Electro-Mechanical Systems)技术制作硅基阳极流场板。其次,通过铜箔与阴极流场板一体成型、有机清洗和PDMS表面活化等改进措施显著提升了PDMS阴极流场板金属化的能力。最后,比较和分析阳极流场板上3种不同结构的流道形式的堆栈式μ-DMFC的输出性能。实验结果表明,活化后的PDMS阴极流场板与Cr/Au的粘附性能和粘接强度显著提高,同时阳极流场板的流道一半开设为凸台,一半开设为通孔时,其堆栈式μ-DMFC的输出性能最优。最大输出电流密度为81.25 mA/cm2,最大输出功率为7.73 mW/cm2。采用硅和PDMS材料分别制作流场板,不仅简化了堆栈式μ-DMFC的结构,而且能够缓冲锁紧力,有效保护硅基阳极流场板。同时优化阳极流场板上的流道结构,能够有效提升堆栈式μ-DMFC的输出性能。

关键词：堆栈式微型直接甲醇燃料电池微机电系统 PDMS流场板金属化