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transparent neural interfaces:challenges and solutions of microengineered multimodal implants designed to measure intact neuronal populations using high-resolution electrophysiology and microscopy simultaneously

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Microsystems & Nanoengineering 2023年第3期9卷 1-30页

作者： Z.Fekete A.Zátonyi A.Kaszás M.Madarász A.Slézia Research Group for Implantable Microsystems Faculty of Information Technology&BionicsPázmány Péter Catholic UniversityBudapestHungary Institute of Cognitive Neuroscience&Psychology Eotvos Lorand Research NetworkBudapestHungary Mines Saint-Etienne Centre CMPDépartement BELF-13541 GardanneFrance Institut de Neurosciences de la Timone CNRS UMR 7289&Aix-Marseille Université13005 MarseilleFrance János Szentágothai PhD Program of Semmelweis University BudapestHungary BrainVision Center BudapestHungary

The aim of this review is to present a comprehensive overview of the feasibility of using transparent neural interfaces in multimodal in vivo experiments on the central nervous *** electrophysiological and neuroimaging approaches hold great potential for revealing the anatomical and functional connectivity of neuronal ensembles in the intact *** approaches are less time-consuming and require fewer experimental animals as researchers obtain denser,complex data during the combined *** devices that provide high-resolution,artifactfree neural recordings while facilitating the interrogation or stimulation of underlying anatomical features is currently one of the greatest challenges in the field of *** are numerous articles highlighting the trade-offs between the design and development of transparent neural interfaces;however,a comprehensive overview of the efforts in material science and technology has not been *** present work fills this gap in knowledge by introducing the latest micro-and nanoengineered solutions for fabricating substrate and conductive ***,the limitations and improvements in electrical,optical,and mechanical properties,the stability and longevity of the integrated features,and biocompatibility during in vivo use are discussed.

关键词： modal resolution transparent

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transparent inorganic multicolour displays enabled by zinc-based electrochromic devices

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Light(Science & Applications) 2020年第1期9卷 861-871页

作者： Wu Zhang Haizeng Li William W.Yu Abdulhakem Y.Elezzabi Ultrafast Optics and Nanophotonics Laboratory Department of Electrical and Computer EngineeringUniversity of AlbertaEdmontonAlberta T6G 2V4Canada Department of Chemistry and Physics Louisiana State UniversityShreveportLA 71115USA

Electrochromic displays have been the subject of extensive research as a promising colour display *** current state-of-the-art inorganic multicolour electrochromic displays utilize nanocavity structures that sacrifice transparency and thus limit their diverse ***,we demonstrate a transparent inorganic multicolour display platform based on Zn-based electrochromic *** devices enable independent operation of top and bottom electrochromic electrodes,thus providing additional configuration flexibility of the devices through the utilization of dual electrochromic layers under the same or different colour ***-sodium vanadium oxide(Zn-SVO)electrochromic displays were assembled by sandwiching Zn between two SVO electrodes,and they could be reversibly switched between multiple colours(orange,amber,yellow,brown,chartreuse and green)while preserving a high optical *** Zn-SVO electrochromic displays represent the most colourful transparent inorganic-based electrochromic displays to *** addition,the Zn-SVO electrochromic displays possess an open-circuit potential(OCP)of 1.56 V,which enables a self-colouration behaviour and compelling energy retrieval *** study presents a new concept integrating high transparency and high energy efficiency for inorganic multicolour displays.

关键词： transparency enable transparent

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transparent and anti-fogging AlPO_(4)-5 films constructed by oblique oriented nano-flake crystals

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Chinese Journal of Chemical Engineering 2022年第4期35卷 332-340页

作者： Fei Tong Jie Gong Liang Yu Ming Li Lixiong Zhang School of Chemistry and Environmental Engineering Jiangsu University of TechnologyChangzhou 213001China State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemical Engineering Nanjing Tech UniversityNanjing 211816China Chemical Technology LuleåUniversity of TechnologySE-97187 LuleåSweden

In the present work,transparent and anti-fogging AlPO_(4)-5 films were prepared on glass substrates using a novel developed *** process entails a simple in-situ sol–gel followed by vapor phase *** in-situ sol–gel process was implemented by coating the precursor sols for the synthesis of AlPO4-5 on the glass substrates successively using the spin-coating *** films and powders scribed from the films were characterized by X-Ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),scanning electron microscope(SEM),atomic force microscope(AFM),X-ray photoelectron spectroscopy and transmission electron microscope(TEM).The unique films were composed of oblique oriented nanoflake AlPO_(4)-5 crystals with the thickness of about 20 *** formation of nano-flake crystals can be ascribed to the high concentration of the precursors,resulting in the formation of a supersaturation *** obtained films showed high antifogging performance due to the superhydrophilicity with a water contact angle of lower than 1.0°.The silicone oil contact angle was also low about 8.2°.In addition,heteroatom-substituted AlPO_(4)-5 films showing different colors can be obtained easily by simply adding transition metal ions in the phosphate acid solution during the preparation that can extend the application of the method for different coating demand.

关键词： AlPO_(4)-5 thin film Oriented film transparent Superhydrophilicity Anti-fogging

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transparent and flame retardant cellulose/aluminum hydroxide nanocomposite aerogels

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Science China Chemistry 2016年第10期59卷 1335-1341页

作者： Bin Yuan Jinming Zhang Jian Yu Rui Song Qinyong Mi Jiasong He Jun Zhang Key Laboratory of Engineering Plastics Institute of Chemistry Chinese Academy of Sciences College of Chemistry and Chemical Engineering University of Chinese Academy of Sciences Sino-Danish Center for Education and Research Sino-Danish College at University of Chinese Academy of Sciences

Cellulose-based nanocomposite aerogels were prepared by incorporation of aluminum hydroxide(AH) nanoparticles into cellulose gels via in-situ sol-gel synthesis and following supercritical CO_2 drying. The structure and properties of cellulose/AH nanocomposite aerogels were investigated by Fourier transform infrared spectroscopy, scanning electron microscopy,ultraviolet-visible spectrometry, N_2 adsorption, thermogravimetric analysis, and micro-scale combustion calorimetry. The results indicated that the AH nanoparticles were homogeneously distributed within matrix, and the presence of AH nanoparticles did not affect the homogeneous nanoporous structure and morphology of regenerated cellulose aerogels prepared from1-allyl-3-methylimidazolium chloride solution. The resultant nanocomposite aerogels exhibited good transparency and excellent mechanical properties. Moreover, the incorporation of AH was found to significantly decrease the flammability of cellulose aerogels. Therefore, this work provides a facile method to prepare transparent and flame retardant cellulose-based nanocomposite aerogels, which may have great potential in the application of building materials.

关键词： cellulose nanocomposite aerogel flame retardant transparent aluminum hydroxide ionic liquid

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transparent neural implantable devices:a comprehensive review of challenges and progress

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npj Flexible Electronics 2022年第1期6卷 439-456页

作者： Young Uk Cho Se Lin Lim Jung-Hoon Hong Ki Jun Yu Department of Electrical and Electronic Engineering Yonsei UniversitySeoulKorea Department of Electrical and Electronic Engineering YU-Korea Institute of Science and Technology InstituteYonsei UniversitySeoulKorea

The key to designing an implantable device lies in condensing the synergistic effects of diagnostic and therapeutic methods in a single *** conjunction with the integration of electrophysiology and optical modalities,a transparent neural interface alleviates challenges of conventional metal-based *** this review,the multimodal sensing and stimulation functionalities of recent research are ***,issues that arise when combining functionalities of conventional metal-based,opaque electrode arrays together with optical modalities—(1)photoelectric artifacts,(2)optical image blocking,and(3)light transmission efficiency—are ***,an introduction of advancing material candidates for transparent neural interfaces follows with the latest research.

关键词： neural transparent modal

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Mechanical and dielectric properties of porous and wave-transparent Si3N4–Si3N4 composite ceramics fabricated by 3D printing combined with chemical vapor infiltration

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Journal of Advanced Ceramics 2019年第3期8卷 399-407页

作者： Zanlin CHENG Fang YE Yongsheng LIU Tianlu QIAO Jianping LI Hailong QIN Laifei CHENG Litong ZHANG Science and Technology on Thermostructure Composite Materials Laboratory Northwestern Polytechnical University

Porous Si3N4–Si3N4 composite ceramics were fabricated by 3D printing combined with low-pressure chemical vapor infiltration(CVI).This technique could effectively improve the designability of porous Si3N4 ceramics and optimize the mechanical and dielectric *** effects of process parameters including the deposition time and heat treatment on the microstructure and properties of porous Si3N4–Si3N4 composite ceramics were *** study highlights following:When CVI processing time was increased from 0 to 12 h,the porosity decreased from68.65%to 26.07%and the density increased from 0.99 to 2.02 g/*** the same time,the dielectric constant gradually increased from 1.72 to 3.60;however,the dielectric loss always remained less than0.01,indicating the excellent electromagnetic(EM)wave-transparent performance of porous Si3N4–Si3N4 composite *** maximum flexural strength of 47±2 MPa was achieved when the deposition time attained 6 *** heat treatment,the porosity increased from 26.07%to 36.02%and the dielectric constant got a slight increase from 3.60 to 3.70 with the dielectric loss still maintaining lower than *** has been demonstrated that the porous Si3N4–Si3N4 composite ceramics are a promising structural and EM wave-transparent material suitable for high temperature service.

关键词： porous Si3N4 ceramics Si3N4–Si3N4 composite ceramics mechanical property electromagnetic(EM) wave transparent performance 3D printing chemical vapor infiltration(CVI)

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Hybrid laser precision engineering of transparent hard materials:challenges,solutions and applications

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Light(Science & Applications) 2021年第9期10卷 1607-1629页

作者： Huagang Liu Wenxiong Lin Minghui Hong Department of Electrical and Computer Engineering National University of Singapore4 Engineering Drive 3117576SingaporeSingapore Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China

Laser has been demonstrated to be a mature and versatile tool that presents great flexibility and applicability for the precision engineering of a wide range of materials over other established micromachining *** decades have witnessed its rapid development and extensive applications ranging from scientific researches to industrial *** hard materials remain several major technical challenges for conventional laser processing techniques due to their high hardness,great brittleness,and low optical absorption.A variety of hybrid laser processing technologies,such as laser-induced plasma-assisted ablation,laser-induced backside wet etching,and etching assisted laser micromachining,have been developed to overcome these barriers by introducing additional medium assistance or combining different process *** article reviews the basic principles and characteristics of these hybrid *** these technologies are used to precisely process transparent hard materials and their recent advancements are *** hybrid technologies show remarkable benefits in terms of efficiency,accuracy,and quality for the fabrication of microstructures and functional devices on the surface of or inside the transparent hard substrates,thus enabling widespread applications in the fields of microelectronics,bio-medicine,photonics,and microfluidics.A summary and outlook of the hybrid laser technologies are also highlighted.

关键词： transparent versatile overcome

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transparent flexible thin-film p-n junction thermoelectric module

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npj Flexible Electronics 2020年第1期4卷 169-177页

作者： Xizu Wang Ady Suwardi Siew Lay Lim Fengxia Wei Jianwei Xu Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnology and Research(A*STAR)#08-03Fusionopolis WayInnovisSingapore138634Singapore Department of Chemistry National University of Singapore3 Science Drive 3Singapore117543Singapore

transparent and flexible thermoelectrics has been highly sought after for future wearable ***,the main stumbling block to prevent its widespread adoption is the lack of p-type transparent thermoelectrics and the stringent criteria of electrical and thermal properties matching appropriately between p-legs and *** work demonstrates the fabrication of p-type PEDOT:PSS films whose optical properties,electrical conductivity,thermal conductivity,and Seebeck coefficient were engineered to perfectly match the n-type indium tin oxide(ITO)*** dense p-type PEDOT:PSS and n-type ITO thin films show a thermoelectric figure of merit of zT=0.30 and 0.29 at 450 K,and a thermal conductivity of 0.22 and 0.32 W m^(−1) K^(−1),respectively.A flexible thermoelectric generator(TEG)module with a high transmittance of>81%in the visible wavelength range of 400-800 nm is fabricated using 10 pairs of p-type PEDOT:PSS and n-type ITO thin film *** ultra-high power density of 22.2 W m^(−2) at a temperature gradient of 80 K was observed,which is the highest power density reported for organic/hybrid-based flexible TEGs so *** transparent flexible thin-film p-n junction thermoelectric module with exceptionally high power generation may take a tremendous step forward towards multi-functional wearable devices.

关键词： film transparent exceptional

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A new methodology to obtain the fracture toughness of YAG transparent ceramics

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Journal of Advanced Ceramics 2019年第3期8卷 418-426页

作者： Haomin WANG Zhangyi HUANG Jianqi QI Jun WANG Institute for Advanced Study Chengdu UniversityChengdu610106China College of Physical Science and Technology Sichuan UniversityChengdu610064China Key Laboratory of High Energy Density Physics and Technology of Ministry of Education Sichuan UniversityChengdu610064China School of Physics and Electronic Engineering Sichuan University of Science&EngineeringZigong643000China

A new methodology was proposed for testing the fracture toughness of YAG transparent ceramics depended on temperature. In our model, the fracture toughness, as a material-specific property, can be expressed as tensile strength treated as the physical property or a material constant. Using this method, a suitable size larger than the inherent defects of ceramic samples and the creation of atomically sharp pre-cracks on the surface of ceramic specimens were able to be ignored. Besides, the fracture of ceramic can be described as the equivalence between the release of elastic storage energy and surface energy associated with the new fracture surface. From thermodynamics theory, the system’s internal energy includes the kinetic energy of atomic motion and the potential energy between atoms in the system. Finally, the fracture toughness at different temperatures can also be calculated by this simple quantitative relationship. In order to confirm the validity of this model, the decreasing fracture toughness of YAG transparent ceramic with increasing temperature was predicted, and the result coincided with the experimental results.

关键词： fracture toughness fracture strength transparent ceramic high temperature YAG ceramic

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All-inorganic ultrathin high-sensitivity transparent temperature sensor based on a Mn-Co-Ni-O nanofilm

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Microsystems & Nanoengineering 2024年第3期10卷 195-205页

作者： Yuanyuan Cui Mengwei Sun Changbo Liu Yuan Deng Research Institute for Frontier Science Beihang UniversityBeijing 100191China School of Materials Science and Engineering Beihang UniversityBeijing 100191China Key Laboratory of Intelligent Sensing Materials and Chip Integration Technology of Zhejiang Province Hangzhou Innovation Institute of Beihang UniversityHangzhou 310051China

The demand for optically transparent temperature sensors in intelligent devices is ***,the performance of these sensors,particularly in terms of their sensitivity and resolution,must be further *** study introduces a novel transparent and highly sensitive temperature sensor characterized by its ultrathin,freestanding design based on a Mn-Co-Ni-O *** Mn-Co-Ni-O-based sensor exhibits remarkable sensitivity,with a temperature coefficient of resistance of−4%℃^(−1),and can detect minuscule temperature fluctuations as small as 0.03℃.Additionally,the freestanding sensor can be transferred onto any substrate for versatile application while maintaining robust structural stability and excellent resistance to interference,indicating its suitability for operation in challenging *** practical utility in monitoring the surface temperature of optical devices is demonstrated through vertical integration of the sensor and a micro light-emitting diode on a polyimide ***,an experiment in which the sensor is implanted in rats confirms its favorable biocompatibility,highlighting the promising applications of the sensor in the biomedical domain.

关键词： transparent sensor versatile

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