Facile Semiconductor p-n Homojunction Nanowires with Strategic p-Type Doping Engineering Combined with Surface Reconstruction for Biosensing Applications

Photosensors with versatile functionalities have emerged as a cornerstone for breakthroughs in the future optoelectronic systems across a wide range of applications.In particular,emerging photoelectrochemical(PEC)-type devices have recently attracted extensive interest in liquid-based biosensing applications due to their natural electrolyte-assisted operating characteristics.Herein,a PEC-type photosensor was carefully designed and constructed by employing gallium nitride(GaN)p-n homojunction semiconductor nanowires on silicon,with the p-GaN segment strategically doped and then decorated with cobalt-nickel oxide(CoNiO_(x)).Essentially,the p-n homojunction configuration with facile p-doping engineering improves carrier separation efficiency and facilitates carrier transfer to the nanowire surface,while CoNiO_(x)decoration further boosts PEC reaction activity and carrier dynamics at the nanowire/electrolyte interface.Consequently,the constructed photosensor achieves a high responsivity of 247.8 mA W^(-1)while simultaneously exhibiting excellent operating stability.Strikingly,based on the remarkable stability and high responsivity of the device,a glucose sensing system was established with a demonstration of glucose level determination in real human serum.This work offers a feasible and universal approach in the pursuit of high-performance bio-related sensing applications via a rational design of PEC devices in the form of nanostructured architecture with strategic doping engineering.

Surface decoration of mesocarbon microbeads with multifunctional TiNbO_(4-x)@C coating layer as high rate and stable anode of Li-ion batteries

Surface modification of graphite anode with electroactive matters has been proven of a more practical strategy in enhancing the performance of Li-ion batteries than exploring alternative novel anode materials.Herein,rutile TiNbO_(4-x) nanoparticles with a tunnel structure are employed as multifunctional decoration substances in combination with a carbon coating layer to improve the rate and cycle properties of mesocarbon microbeads(MCMBs).As compared to pristine MCMB,the Li^(+)diffusion coefficients of the composite anodes are enhanced due to the synergistic effect of TiNbO_(4-x)@C.Meanwhile,the overcharge and voltage polarization of the composite anodes at high rate are obviously minimized due to the current sharing effect of the high-potential TiNbO_(4-x).Moreover,the amorphous Li_(y)TiNbO_(4-x) converted from TiNbO_(4-x) in the initial lithiation process can deliver pseudocapacitive capacity to the composite anodes from the second cycle.All of these functions of TiNbO_(4-x)@Ccoating layer have directly contributed to the improved rate and cycle performance of the MCMB/TiNbO_(4-x)@C composite anodes.The one containing 12.0 wt%TiNbO_(4-x) exhibits a high reversible specific capacity of 118 m Ah·g^(-1)at 10C(1C=372 m A·g^(-1)),together with a high capacity retention of 90.9%after 300 cycles at 3C,which are all much superior to those of pristine MCMB.

Facile synthesis of C-decorated Fe,N co-doped TiO_2 with enhanced visible-light photocatalytic activity by a novel co-precursor method

Lattice‐doping and surface decoration are prospective routes to improve the visible‐light photocatalytic ability of TiO2,but the two techniques are difficult to combine into one preparation process because they are usually conducted under different conditions,which limits the efficiency of TiO2 modification.In this study,TiO2 was successfully modified by simultaneous lattice‐doping and surface decoration,and the visible‐light photocatalytic capacity was largely improved.Upon comparing the method reported here with previous ones,the most significant difference is that Fe(II)‐phenanthroline was first used as the co‐precursor of the introduced elements of C,N,and Fe.These three elements were simultaneously introduced to TiO2 at high levels by this co‐precursor method.The as‐synthesized photocatalysts were systemically investigated and analyzed by several characterization methods such as XRD,FT‐IR,XPS,Raman spectroscopy,EPR,UV‐Vis DRS,photoluminescence spectra,photocurrent,electrochemical impedance spectra,TEM,and HRTEM.The photocatalytic degradation of 4‐NP under visible‐light irradiation was used to evaluate the photocatalytic activity of the photocatalysts.Based on the experimental data,a probable mechanism for the photocatalytic degradation by the photocatalysts is proposed.This is a novel method of using one source to simultaneously introduce metal and non‐metal elements to TiO2 at high levels,which may provide a new way to prepare highly effective TiO2 photocatalysts.

Decorative Wood Fiber/High-Density Polyethylene Composite with Canvas or Polyester Fabric

Wood-plastic composite is an environmentally friendly material,due to its use of recycled thermoplastics and plant fibers.However,its surface lacks attractive aesthetic qualities.In this paper,a method of decorating wood fiber/high-density polyethylene(WF/HDPE)without adding adhesive was explored.Canvas or polyester fabrics were selected as the surface decoration materials.The influence of hot-pressing temperature and WF/HDPE ratio on the adhesion was studied.The surface bonding strength,water resistance,and surface color were evaluated,and observation within the infrared spectrum and under scanning electron microscopy was used to analyze the bonding process.The results showed that the fabric and WF/HDPE substrate could be closely laminated together depending on the HDPE layer accumulated on the WF/HDPE surface.The molten HDPE matrix penetrates canvas more easily than polyester fabric,and the canvasveneered composite shows a greater bonding strength than does the polyester fabric-veneered composite.A higher proportion of the thermoplastic component in the substrate improved the bonding.When the hot-pressing temperature exceeded 160°C,the fabric-veneered WF/HDPE panels had greater water resistance,although the canvas fabric changed more obviously in terms of fiber shape and color,compared with the polyester fabric.For the canvas fabric,140°C–160°C was a suitable hot-pressing temperature,whereas 160°C–180°C was more suitable for polyester fabric.The proportion of the thermoplastic component in the composite should be not less than 30%to achieve adequate bonding strength.

印刷装饰纸透气度对浸渍胶膜纸饰面刨花板表面耐开裂性能的影响

对比研究了不同透气度印刷装饰纸,经相同浸渍、压贴工艺制成饰面刨花板的表面耐龟裂性能和表面耐冷热循环性能。结果表明,印刷装饰纸透气度(单位s/100 mL)数值越低,透气性能越好,相同工艺条件制备浸渍胶膜纸时上胶越容易,透气度为16.37 s/100 mL的样品比透气度为65.02 s/100 mL的浸胶量提高了8.4%。当印刷装饰纸透气度大于35 s/100 mL时,由其浸胶后饰面制得的饰面刨花板表面耐龟裂性能和耐冷热循环性能不合格率分别为87.5%和75.0%。

板式家具表面肤感装饰技术研究进展

随着科技的提升和人民生活水平的提高,消费者对木质家居产品的品质要求从“视觉”向“触觉”发展,“肤感”家具产品近年来发展迅速。本文对板式家具表面肤感装饰技术的研究进展进行概述,总结板式家具肤感表面形成机制,肤感产品的生产技术、肤感性能评价方法等,并分析存在的问题与发展建议,为板式家具表面肤感性能的进一步提升提供参考。

室外印刷装饰纸透气度对内层装修材料表面开裂性的影响研究

装修材料在室外环境下容易受到空气、阳光等的多重作用而出现表面开裂。为分析室外印刷装饰纸透气度对内层装修材料表面开裂性的影响,以不同透气度的印刷装饰纸为例,采用相同的工艺条件在装修材料表面进行贴敷,通过对比纸张透气度对浸胶量的影响和装修材料表面的开裂情况,以得到室外环境下印刷装饰纸透气度对内层装修材料表面开裂性的影响。结果表明:装饰纸的透气度越高则浸胶越简单,当透气度超过36.7s/100mL后,装修材料开始出现开裂现象。

纳米抗菌三聚氰胺浸渍胶膜纸饰面板的制备及性能研究

研发了具有抗菌功能的三聚氰胺浸渍胶膜纸饰面板(三聚氰胺板),并对其相关性能进行了测试。结果表明:改性后纳米抗菌剂Ag/TiO_(2)和ZnO依然保持良好的抗菌性能,其大肠杆菌抑菌圈直径分别减小1.47%和3.31%,金黄色葡萄球菌抑菌圈直径分别减小2.47%和0.99%。硅烷偶联剂KH560和KH570成功接枝在纳米抗菌剂Ag/TiO_(2)和ZnO表面。表面有机改性未改变纳米抗菌剂的化学结构和晶体结构,通过形成空间位阻效应提高了纳米粒子表面张力,降低了粉体团聚现象。复配纳米抗菌剂(Ag/TiO_(2)&ZnO)添加比例为1%时,对大肠杆菌和金黄色葡萄球菌的抗菌率分别为99.2%和99.5%。三聚氰胺板各项物理力学指标均满足GB/T 15102—2017《浸渍胶膜纸饰面纤维板和刨花板》标准的质量要求。

预防墙面装饰性开裂的施工措施分析

为有效解决墙面装饰性开裂问题,提高建筑结构整体美观性,确保人们居住的安全性和舒适性,论文论述了墙面裂缝的类型及装饰层施工工艺,分析了装饰性开裂的规律、成因、发展趋势,并分别从原材料及施工工艺等方面提出了防止墙面装饰性开裂的施工措施。

异形墙面高性能装饰膜安装施工技术

剧院建筑的观众厅以建筑声学为目标,舞台演出时通过观众厅墙面进行声波反射,可以做到完全自然声演出,观众可以舒适地感受到声音亲切自然,明亮而有温暖感,以及良好的空间感。在保证音质的前提下,观众厅的体型设计关键而又复杂,造就了观众厅墙面装修造型呈飘逸的弧线。复杂的建筑造型采用GRG材料作为基层,面层采用木纹装饰膜,最终实现观众厅的声学效果及艺术追求。木纹装饰膜材料的选择、材料的性能、墙面装饰基层控制、木纹装饰膜分块及施工的控制是保证施工质量的关键要求。

Effect of film types on thermal response,cellular structure,forming defects and mechanical properties of combined in-mold decoration and microcellular injection molding parts

Different types of polymer films were used in the combined in-mold decoration and microcellular injection molding(IMD/MIM)process.The multiphase fluid-solid coupled heat transfer model was established to study the thermal response at the melt filling stage in the IMD/MIM process.It was found that the temperature distributed asymmetrically along the thickness direction due to the changed heat transfer coefficient of the melt on the film side.When polyethylene terephthalate(PET)films were applied,the temperature of the melt-film interface increased faster and to be higher at the end of melt filling stage in comparison with the application of polycarbonate(PC)and thermoplastic polyurethane(TPU)films.And the effects of film types on the cellular structure,forming defects and mechanical properties of IMD/MIM parts were also studied experimentally.The results showed that the film types had no obvious effect on the cells size in the transition layer and the mechanical properties of the parts.Under certain film thickness,the offset distance of core layer was the largest with PET film used,while the offset distance was the smallest with TPU film used.And similar results were found for the warpage of the parts.However,an exactly opposite change occurred for the thickness of film-side transition layer and the bubble marks on the surface of the parts.

喷砂、阳极氧化和着色串联工艺获得的铝合金表面的腐蚀防护及装饰效果

综述了喷砂、阳极氧化和着色串联工艺对铝合金表面腐蚀防护及装饰效果的影响。喷砂预处理可去除铝合金表面污物和氧化层,提高表面粗糙度和活性,为阳极氧化提供良好的基础。阳极氧化处理在铝合金表面形成一层均匀、致密的氧化膜,具有良好的耐磨性、耐热性和耐蚀性。着色处理可实现个性化装饰效果。喷砂、阳极氧化和着色串联工艺能显著提升铝合金表面的腐蚀防护和装饰效果,提高产品市场竞争力。同时,该工艺具有环保、高效、成本低的优点,应用前景广泛。

清水混凝土在曲面薄板结构中的应用技术

以某云顶项目为例,针对清水混凝土在曲面薄板结构中需要的高品质饰面效果要求,开展了清水混凝土原材料选择、配合比设计、工作性能等关键技术研究;并基于试验结果通过优化砂率,降低了粗砂对清水混凝土和易性以及表观效果的影响;同时为了呈现更优质的装饰效果,形成了清水混凝土生产质量控制技术。结果表明:单掺10%矿粉或粉煤灰与双掺各8%粉煤灰和矿粉,混凝土无明显色差,但单掺矿粉的混凝土颜色稳定性更好;针对现有的原材料综合考虑,采用8322外加剂时新拌混凝土的性能更好。

大型超5A商务办公楼精装修工程的装饰技术创新

基于国泰君安新建办公楼的精装修工程,分别对墙面材料施工技术及大规模天花板施工工艺开展技术研究,以达到提高工程整体质量及细节表现效果的目的,从而为后续类似的高端商务楼装饰工程提供技术储备。通过研发出精装修工程墙面材料的新型加工技术,形成金属-石材饰面墙干挂技术及防火涂料钢柱外包技术,有效提升了建筑墙面的观感效果,并降低了施工成本。此外,创新研发出商务楼精装修工程的大规模天花板施工工艺,采用超大规格软膜天花板施工技术及超大面积艺术发光天花板等新型施工技术,确保了整体效果的一致性。

基于复合装饰面贴合结构的建筑装饰施工技术研究

本文探讨了复合装饰面贴合结构在建筑装饰施工工艺中的优化与创新,重点研究了新材料与新技术的应用、建筑装饰施工工艺的完善与创新以及施工质量管理体系的建立与完善。指出引入高性能复合材料、数字化施工技术、智能化管理系统等新材料、新技术,可明显提高施工质量和施工效率。与此同时,建筑装饰施工工艺也在不断地改进与创新,完善质量管理体系,对于确保工程质量与安全具有非常重要的意义。

不规则饰面自然装饰混凝土施工技术应用

通过对不规则饰面自然装饰混凝土的结构特点和施工重、难点的分析,研究和设计了一种能一次性成型,并实现自然装饰混凝土结构多曲面、无模板拼缝的清水混凝土效果的复合模板体系和施工技术。该技术是通过制作母模,制作硅胶模板,将硅胶模板与常规模板结合形成复合模板体系的施工方法,有效解决了不规则饰面自然装饰混凝土结构施工的难题。

基于CMF设计的商用车工艺发展趋势

近年来,随着生态文明建设的深入和消费需求的升级,迫切要求商用车行业向清洁低碳化转变,革新技术满足多样化市场需求。为做好工艺技术储备,文章基于颜色、材料、表面处理(CMF)设计对商用车工艺发展趋势进行预研。从市场趋势、新材料及成型工艺和先进涂装、表面装饰工艺发展趋势等多个维度,深入探讨了CMF设计对未来商用车设计制造的影响和发展潜力。探讨了高端市场竞争中,通过使用新材料新工艺优化内外饰设计对提升客户驾驶体验的重要性,提出了在材料选择、制造工艺和表面处理等方面的创新思路,旨在提升商用车的市场竞争力和品牌价值。

面漆类型及表面色度值对数码涂装饰面人造板耐黄变性能的影响

对引起数码涂装饰面人造板黄变的原因进行探究,分析透明面漆类型及表面色度值(颜色和花纹图案不同)对饰面人造板耐黄变性能的影响规律。结果表明,较小涂布量的哑光面漆饰面人造板耐黄变性能要明显优于较大涂布量的高光面漆;相同涂布量下高光面漆和UV-3D仿生面漆饰面人造板耐黄变性能存在差异;色度值对饰面人造板耐黄变性能影响最大的是L值,表面色度值大的深色系饰面人造板耐黄变性能要明显优于较小色度值的浅色系饰面人造板。

浸渍胶膜纸饰面人造板气味释放研究进展

综述了国内外对浸渍胶膜纸饰面人造板及其原辅料气味释放的相关研究,从人造板制备用木材、胶黏剂、装饰纸等方面探讨了浸渍胶膜纸饰面人造板的气味来源及化学成分,为浸渍胶膜纸饰面人造板及制品的气味控制提供参考。

饰面高性能混凝土在地铁工程中的技术运用研究

随着城市化进程的加快和城市交通需求的不断增长,地铁作为城市主要的公共交通方式,其建设和发展日益成为城市规划和交通基础设施建设的重要组成部分。在地铁工程中,饰面高性能混凝土(HPC-SF)作为一种技术先进、性能优越的建筑材料,因其在耐久性、抗裂性和施工效率等方面的显著优势,逐渐成为地铁车站、隧道及相关结构中的首选材料之一。本文通过对HPC-SF在地铁工程中的应用实例和技术探讨,探索其优化应用的途径和策略,为地铁工程的可持续发展提供理论支持和实际指导。