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Fast prototype and rapid construction of three-dimensional and multi-scaled pitcher for controlled drainage by systematic biomimicry

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International Journal of Extreme Manufacturing 2024年第3期6卷 489-503页

作者： Tao Shen Ning Li Shijie Liu Cunlong Yu Chengqi Zhang Kang Yang Xingfei Li Ruochen Fang Lei Jiang Zhichao Dong Research Institute for Frontier Science Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education BeijingSchool of ChemistryBeihang UniversityBeijing 100191People’s Republic of China cas key laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190People’s Republic of China cas Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083People’s Republic of China School of Future Technology&School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijing 101407People’s Republic of China School of Chemistry and Materials Science University of Science and Technology of China230026 HefeiAnhuiPeople’s Republic of China Suzhou Institute for Advanced Research University of Science and Technology of China215123 SuzhouJiangsuPeople’s Republic of China State key laboratory of Precision Measuring Technology and Instruments Tianjin University300072 TianjinPeople’s Republic of China

Biomimetic materials that use natural wisdom to solve practical problems are developing *** trend for systematic biomimicry is towards in-situ characterization of naturalcreatures with high spatial ***,rapid reconstruction of digital twin models with the same complex features as the prototype is ***,it faces bottlenecks and limits in fast characterization and fabrication,precise parameter optimization,geometricdeviations control,and quality *** solve these challenges,here,we demonstrate astate-of-the-art method taking advantage of micro-computed tomography and three-dimensional printing for the fast characterization of the pitcher plant Nepenthes x ventrata and fabrication of its biomimetic model to obtain a superior drainage controller with multiscale structures withprecise surface morphology optimization and geometric deviation ***-rupture-based drainage dynamic and mechanisms are characterized by x-ray and high-speed videography,which determines the crucial structures for unique *** the optimized artificial pitchers are further developed into sustained drainage devices with novel applications,such as detection,reaction,and smoke control.

关键词： systematic biomimicry biomimetic materials Micro-CT drainage digital twin

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Highly sensitive and stable SERS probes of alternately deposited Ag and Au layers on 3D SiO2 nanogrids for detection of trace mercury ions

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Chinese Physics B 2018年第7期27卷 497-506页

作者： Yi Tian Han-Fu Wang Lan-Qin Yan Xian-Feng Zhang Attia Falak Pei-Pei Chen Feng-Liang Dong Lian-Feng Sun Wei-Guo Chu cas key laboratory for nanosystems and hierachical fabrication Nanofabrication Laboratory CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China

The hazard of Hg ion pollution triggers the motivation to explore a fast, sensitive, and reliable detection method. Here, we design and fabricate novel 36-nm-thick Ag-Au composite layers alternately deposited on three-dimensional （3D） periodic SiO2 nanogrids as surface-enhanced Raman scattering （SERS） probes. The SERS effects of the probes depend mainly on the positions and intensities of their localized surface plasmon resonance （LSPR） peaks, which is confirmed by the absorption spectra from finite-difference time-domain （FDTD） calculations. By optimizing the structure and material to maximize the intrinsic electric field enhancement based on the design method of 3D periodic SERS probes proposed, high performance of the Ag-Au/SiO2 nanogrid probes is achieved with the stability further enhanced by annealing. The optimized probes show the outstanding stability with only 4.0% SERS intensity change during 10-day storage, the excellent detection uniformity of 5.78% （RSD）, the detection limit of 5.0 × 10-12 M （1 ppt）, and superior selectivity for Hg ions. The present study renders it possible to realize the rapid and reliable detection of trace heavy metal ions by developing high- performance 3D periodic structure SERS probes by designing novel 3D structure and optimizing plasmonic material.

关键词： surface-enhanced Raman scattering Ag-Au composite layer nanostructure design trace Hg ions detection

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Science China Chemistry 2019年第6期62卷 739-745页

作者： Fan Liu Shiqing Bi Xiaorui Wang Xuanye Leng Mengmeng Han Baoda Xue Qianqian Li Huiqiong Zhou Zhen Li Department of Chemistry Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials Wuhan University cas key laboratory of Nanosystem and hierachical fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Institute of Molecular Aggregation Science Tianjin University

By intelligently utilizing the odd-even effect existing in the melting points of alkanes as presented in the basic textbook of Organic Chemistry, different alkoxy groups were introduced to modify the structure of commercial Spiro-OMeTAD to give new Spiro derivatives of Spiro-OEtTAD, Spiro-OPrTAD, Spiro-OiPrTAD and Spiro-OBuTAD, with the aim to adjust the molecular packing status in perovskite solar cells as hole transporting compounds. Excitedly, with the introduction of ethoxy groups instead of the methoxy ones in Spiro-OMeTAD, Spiro-OEtTAD-based perovskite solar cells demonstrated the highest device performance of 20.16%, higher than that of Spiro-OMeTAD(18.64%).

关键词： perovskite solar cells alkyl chains molecular packing

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ess Enhanced photothermoelectric conversion in selfrolled tellurium photodetector with geometryinduced energy localization

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Light(Science & Applications) 2024年第8期13卷 1545-1556页

作者： Jiayuan Huang Chunyu You Binmin Wu Yunqi Wang Ziyu Zhang Xinyu Zhang Chang Liu Ningge Huang Zhi Zheng Tingqi Wu Suwit Kiravittaya Yongfeng Mei Gaoshan Huang Department of Materials Science&State key laboratory of Molecular Engineering of Polymers Fudan UniversityShanghai 200438China Yiwu Research Institute of Fudan University Yiwu 322000 ZhejiangChina International Institute of Intelligent Nanorobots and nanosystems Fudan UniversityShanghai 200438China ShanghaiTech Quantum Device Lab ShanghaiTech UniversityShanghai 200120China Department of Electrical Engineering Faculty of EngineeringChulalongkorn UniversityBangkokThailand Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception Institute of OptoelectronicsFudan UniversityShanghai 200438China

Photodetection has attracted significant attention for information *** the implementation relies primarily on the photonic detectors,they are predominantly constrained by the intrinsic bandgap of active *** the other hand,photothermoelectric(PTE)detectors have garnered substantial research interest for their promising capabilities in broadband detection,owing to the self-driven photovoltages induced by the temperature *** get higher performances,it is crucial to localize light and heat energies for efficient ***,there is limited research on the energy conversion in PTE detectors at micro/nano *** this study,we have achieved a twoorder-of-magnitude enhancement in photovoltage responsivity in the self-rolled tubular tellurium(Te)photodetector with PTE *** illumination,the tubular device demonstrates a maximum photovoltage responsivity of 252.13 VW^(-1)and a large detectivity of 1.48×10^(11)*** disclose the mechanism of the PTE conversion in the tubular structure with the assistance of theoretical *** addition,the device exhibits excellent performances in wide-angle and polarization-dependent *** work presents an approach to remarkably improve the performance of photodetector by concentrating light and corresponding heat generated,and the proposed self-rolled devices thus hold remarkable promises for next-generation on-chip photodetection.

关键词： illumination energy primarily

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Blade-Coated Porous 3D Carbon Composite Electrodes Coupled with Multiscale Interfaces for Highly Sensitive All-Paper Pressure Sensors

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Nano-Micro Letters 2024年第12期16卷 217-232页

作者： Bowen Zheng Ruisheng Guo Xiaoqiang Dou Yueqing Fu Bingjun Yang Xuqing Liu Feng Zhou State key laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China Research Center of Resource Chemistry and Energy Materials State Key Laboratory of Solid LubricationLanzhou Institute of Chemical PhysicsChinese of Academy of SciencesLanzhou 730000People’s Republic of China State key laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000People’s Republic of China Shandong laboratory of Advanced Materials and Green Manufacturing at Yantai Yantai 264006People’s Republic of China

Flexible and wearable pressure sensors hold immense promise for health monitoring,covering disease detection and postoperative *** pressure sensors with high sensitivity,wide detection range,and cost-effectiveness is *** leveraging paper for its sustainability,biocompatibility,and inherent porous structure,herein,a solution-processed all-paper resistive pressure sensor is designed with outstanding performance.A ternary composite paste,comprising a compressible 3D carbon skeleton,conductive polymer poly(3,4-ethylene dioxythiophene):poly(styrenesulfonate),and cohesive carbon nanotubes,is blade-coated on paper and naturally dried to form the porous composite electrode with hierachical micro-and nano-structured *** with screen-printed Cu electrodes in submillimeter finger widths on rough paper,this creates a multiscale hierarchical contact interface between electrodes,significantly enhancing sensitivity(1014 kPa-1)and expanding the detection range(up to 300 kPa)of as-resulted all-paper pressure sensor with low detection limit and power *** versatility ranges from subtle wrist pulses,robust finger taps,to large-area spatial force detection,highlighting its intricate submillimetermicrometer-nanometer hierarchical interface and nanometer porosity in the composite ***,this all-paper resistive pressure sensor,with its superior sensing capabilities,large-scale fabrication potential,and cost-effectiveness,paves the way for next-generation wearable electronics,ushering in an era of advanced,sustainable technological solutions.

关键词： Micro-and nano-structures PEDOT:PSS Flexible pressure sensors Health monitoring Multiscale interfaces

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On the Understandings of Dielectric Constant and Its Impacts on the Photovoltaic Efficiency in Organic Solar Cells

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Chinese Journal of Chemistry 2021年第2期39卷 381-390页

作者： Zihao Fu Xuning Zhang Hong Zhang Yanxun Li Huiqiong Zhou Yuan Zhang School of Chemistry Beijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityNo.37 Xueyuan RoadBeijing100191 China key laboratory of Nanosystem and hierachical fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190 China

Dielectric constant(ε)is an important parameter affecting the power conversion efficiency of organic solar cells(OSC).Increasingεof bulk heterojunctions in general can benefit the performance of OSCs,as an increasedεwill reduce the influence of Coulomb interaction between weakly bound electron-hole pairs on charge-transfer states or bimolecular recombination involving mobile carriers to reduce geminate and nongeminate *** this review,we overview the current understandings on dielectric constant and its impacts on exciton dissociation and voltage losses in OSCs and summarize recent efforts attempting to modify the dielectric properties of OSC materials through synthetic *** further discuss the commonly adopted techniques for determining the parameter ofεwith stressing the testing conditions that may affect the accuracy of *** last,we suggest that novel experimental methods to improve the dielectric constant and resultant physical processes in OSCs will be appreciated,which helps enrich the existing strategy reservoir toward enhancement of photovoltaic efficiencies.

关键词： Amorphous materials Donor-acceptor systems Energy conversion Nanostructures Photolysis

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Perovskite intermediate phases fundamentally address the urgent stability issue

Perovskite intermediate phases fundamentally address the urg...

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第九届新型太阳能材料科学与技术学术研讨会

作者： Weichuan Zhang Huiqiong Zhou cas key laboratory of Nanosystem and hierachical fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology University of Chinese Academy of Sciences

Although halide hybrid perovskite solar cells have been rapidly developed, their commercial implementation still needs to overcome the inevitable stability issue. Recently in Chem, Nan et al. discovered a key intermediate of 8 H phase which helps elucidate the complete phase evolution and stabilization mechanism of formamidinium-based perovskite. We further preview this recent finding on the phase evolution and stabilization mechanism of FA-based 3 D perovskites. On this basis, we also point out that a highly efficient and stable solar cell has been achieved by rationally controlling the factors such as composition, stoichiometry, additives, and precursor solution.

关键词： perovskite intermediate phases stability

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Self-Powered Room-Temperature Ethanol Sensor Based on Brush-Shaped Triboelectric Nanogenerator

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Research 2021年第1期2021卷 531-541页

作者： Jingwen Tian Fan Wang Yafei Ding Rui Lei Yuxiang Shi Xinglin Tao Shuyao Li Ya Yang Xiangyu Chen cas Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China

Highly sensitive ethanol sensors have been widely utilized in environmental protection,industrial monitoring,and drink-driving *** this work,a fully self-powered ethanol detector operating at room temperature has been developed based on a triboelectric nanogenerator(TENG).The gas-sensitive oxide semiconductor is selected as the sensory component for the ethanol detection,while the resistance change of the oxide semiconductor can well match the“linear”region of the load characteristic curve of ***,the output signal of TENG can directly reveal the concentration change of ethanol *** accelerator gearbox is applied to support the operation of the TENG,and the concentration change of ethanol gas can be visualized on the Liquid Crystal *** fully self-powered ethanol detector has excellent durability,low fabrication cost,and high selectivity of 5 ***,the ethanol detector based on TENG not only provides a different approach for the gas detection but also further demonstrates the application potential of TENG for various sensory devices.

关键词： generator ethanol durability

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fabrication of highly luminescent TiO_(2):Eu^(3+) thin film with low annealing temperature requirement by co-doping with Sn^(4+) ions

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Journal of Rare Earths 2023年第10期41卷 1494-1502,I0001页

作者： Lu Zhang Bolin Zheng Junyi Zhai Tao Lin laboratory of Optoelectronic Materials and Detection Technology Guangxi Key Laboratory for Relativistic AstrophysicsSchool of Physical Science and TechnologyGuangxi UniversityNanning530004China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning530004China cas Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing100083China

Rare earth(RE)-doped TiO_(2)thin films possess important applications in modern optoelectronic ***,the high annealing temperature requirement remains a critical restriction in device *** this work,TiO_(2)thin films doped with trivalent europium(Eu^(3+))ions were fabricated by a convenient sol-gel approach and subsequent annealing ***,it is found that the optimal post-annealing temperature of TiO_(2):Eu^(3+)thin film is dramatically reduced from 800 to 300℃by incorporating 10 at%Sn^(4+)into the sol *** Sn-incorporated film annealed at 300℃shows a 4-fold enhancement in photoluminescence(PL)intensity related to Eu^(3+)ions to the optimized Sn-free *** analysis reveals that this enhancement is attributed to Sn element promoting the crystallization of both anatase TiO_(2)and rutile SnO_(2)clusters at 300℃,which provides sufficient SnO_(2)/TiO_(2)crystal boundary facilitating Eu^(3+)to occupy and sensitized by SnO_(2)*** results provide valuable insights into fabricating highly luminescent RE-doped TiO_(2)thin films with low annealing temperature requirement,which is essential for designing optoelectronic devices based on RE materials more freely in the future.

关键词： Rare earths Titanium oxide Photoluminescence Sol-gel Post-annealing

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Scalable one-step wet-spinning of triboelectric fibers for large-area power and sensing textiles

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Nano Research 2023年第5期16卷 7518-7526页

作者： Chuan Ning Chuanhui Wei Feifan Sheng Renwei Cheng Yingying Li Guoqiang Zheng Kai Dong Zhong Lin Wang cas Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China College of Materials Science and Engineering Key Laboratory of Material Processing and Mold(Ministry of Education)Henan Key Laboratory of Advanced Nylon Materials and ApplicationZhengzhou UniversityZhengzhou 450001China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China School of Material Science and Engineering Georgia Institute of TechnologyAtlantaGeorgia 30332USA

Textile-based electronic devices have attracted increasing interest in recent years due to their wearability,breathability,*** them,textile-based triboelectric nanogenerators(T-TENGs)exhibit remarkable advantages in mechanical energy harvesting and self-powered ***,there are still some key challenges to the development and application of triboelectric fibers(the basic unit of T-TENG).Scalable production and large-scale integration are still significant factors hindering its *** the same time,there are some difficulties to overcome in the manufacturing process,such as achieving good stretchability and a quick production,overcoming incompatibility between conductive and triboelectric *** this study,triboelectric fibers are produced continuously by one-step coaxial wet *** are only 0.18 mm in diameter and consist of liquid metal(LM)core and polyurethane(PU)*** to the good mechanical properties between them,there is no interface incompatibility of the triboelectric *** addition,triboelectric fibers can be made into large areas of T-TENG by means of digital embroidery and plain *** T-TENGs can be used for energy harvesting and self-powered *** they are fixed on the forearm can monitor various strokes in *** work provides a promising strategy for the large-scale fabrication and large-area integration of triboelectric fibers,promotes the development of wearable T-TENGs.

关键词： triboelectric nanogenerators coaxial wet spinning scale production large-area integration self-powered sensing

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