检索结果-内蒙古大学图书馆

RGB Color-Discriminable Photonic Synapse for Neuromorphic Vision System

nano-Micro Letters 2025年第4期17卷 39-62页

作者： Bum Ho Jeong Jaewon Lee Miju Ku Jongmin Lee Dohyung Kim Seokhyun Ham Kyu-Tae Lee Young-Beom Kim Hui Joon Park Department of Organic and Nano Engineering&Human-Tech Convergence Program Hanyang UniversitySeoul 04763Korea Department of Semiconductor Engineering Hanyang UniversitySeoul 04763Korea Department of Mechanical Engineering Hanyang UniversitySeoul 04763Korea Department of Physics Inha UniversityIncheon 22212Korea

To emulate the functionality of the human retina and achieve a neuromorphic visual system,the development of a photonic synapse capable of multispectral color discrimination is of paramount ***,attaining robust color discrimination across a wide intensity range,even irrespective of medium limitations in the channel layer,poses a significant ***,we propose an approach that can bestow the color-discriminating synaptic functionality upon a three-terminal transistor flash memory even with enhanced discriminating *** incorporating the strong induced dipole moment effect at the excitation,modulated by the wavelength of the incident light,into the floating gate,we achieve outstanding RGB color-discriminating synaptic functionality within a remarkable intensity range spanning from 0.05 to 40 mW cm^(-2).This approach is not restricted to a specific medium in the channel layer,thereby enhancing its *** effectiveness of this color-discriminating synaptic functionality is demonstrated through visual pre-processing of a photonic synapse array,involving the differentiation of RGB channels and the enhancement of image contrast with noise ***,a convolutional neural network can achieve an impressive inference accuracy of over 94%for Canadian-Institute-For-Advanced-Research-10 colorful image recognition task after the *** proposed approach offers a promising solution for achieving robust and versatile RGB color discrimination in photonic synapses,enabling significant advancements in artificial visual systems.

关键词： organic field-effect transistor Photonic synapse Excited-state dipole moment RGB color discrimination Neuromorphic visual system

来源：评论

学校读者我要写书评

暂无评论

Molecular engineering of Benzobisoxazole-Based Conjugated Polymers for High-Performance organic Photodetectors and Fingerprint Image Sensors

引用

Energy & Environmental Materials 2025年第1期8卷 155-167页

作者： Cheol Shin Won Jo Jeong Ezgi Darici Lee Jong Baek Park Hyungju Ahn Seyeon Baek Myeong In Kim Dae Sung Chung Kang-Il Seo In Hwan Jung Department of Organic and Nano Engineering and Human-Tech Convergence Program Hanyang University CLAP Co. Ltd. Pohang Accelerator Laboratory POSTECH Department of Chemical Engineering Pohang University of Science and Technology (POSTECH)

Various novel conjugated polymers(CPs) have been developed for organic photodetectors(OPDs),but their application to practical image sensors such as X-ray,R/G/B,and fingerprint sensors is *** this article,we report the entire process from the synthesis and molecular engineering of novel CPs to the development of OPDs and fingerprint image *** synthesized six benzo[1,2-d:4,5-d']bis(oxazole)(BBO)-based CPs by modifying the alkyl side chains of the CPs.

关键词： alkyl side chain engineering fingerprint image sensor on/off ratio organic photodetector specific detectivity

来源：评论

学校读者我要写书评

暂无评论

Synergistic design of Pickering emulsion inks of nanochitosan-alginate-beeswax for edible coating in fruit preservation

引用

Food Hydrocolloids 2025年 167卷

作者： Kim, Jinkyung Seo, Jaesik Kim, Hyo Jeong Jeong, Yunho Lee, Hyunjun Park, Chanwook Eom, Youngho Department of Polymer Engineering Pukyong National University Busan48513 Korea Republic of Sustainable Materials Research Team Materials Research and Engineering Center Hyundai Motor Company Gyonggi Uiwang16082 Korea Republic of Department of Organic and Nano Engineering Human-Tech Convergence Program Hanyang University Seoul04763 Korea Republic of

Chitosan nanowhisker (CSW) has attracted attention as a coating agent in packaging applications because of its biocompatibility, anti-bacterial activity, and high gas barrier. However, the poor viscoelasticity of virgin CSW dispersions limits the coating process to spraying or dip-coating at very dilute concentrations. Herein, rheology-engineered CSW inks with improved coating abilities were designed, making them suitable for mass-produced coatings. Given the positive surface charge of CSW, eight types of negatively charged eco-friendly binders were selected, and their efficiency as rheological modifiers was assessed at a CSW:binder weight fraction of 1:1. Among them, three binders, sodium alginate (SA), carboxymethyl cellulose, and guar, simultaneously enhanced the viscoelasticity and homogeneity. Accordingly, the three composite inks exhibit high spreadability in practical coating. Particularly, the CSW/SA coating films exhibited remarkable mechanical properties with strength and toughness of 32.9 MPa and 1.4 MJ m−3, respectively. To apply edible coatings for fruit preservation, beeswax (BW) was mixed with CSW/SA to form Pickering emulsion inks. CSW acts as a Pickering stabilizer in the aqueous BW emulsion, affording it high dispersibility. Owing to its improved hydrophobicity, the edible CSW/SA/BW coating significantly extended the shelf life of bananas and strawberries. © 2025 Elsevier Ltd

关键词： Binders

来源：评论

学校读者我要写书评

暂无评论

Near-infrared photodetection in tin halide perovskites via compositional engineering

引用

Materials Science and engineering R: Reports 2025年 165卷

作者： Park, Hansol Lee, Cheong Beom Lim, Seon-Jeong Kim, Hakjun Kim, Kyeounghak Park, Hui Joon Department of Organic and Nano Engineering Hanyang University Seoul04763 Korea Republic of Human-Tech Convergence Program Hanyang University Seoul04763 Korea Republic of Department of Chemistry Hanyang University Seoul04763 Korea Republic of Samsung Advanced Institute of Technology Samsung Electronics Suwon16678 Korea Republic of Department of Chemical Engineering Hanyang University Seoul04763 Korea Republic of Department of Semiconductor Engineering Hanyang University Seoul04763 Korea Republic of Institute of Nano Science Technology Hanyang University Seoul04763 Korea Republic of

Tin (Sn) halide perovskites, with an optical bandgap below 1.4 eV, are promising for near-infrared photodetectors (NIR-PDs). However, their inherent instability due to Sn2+ oxidation and sensitivity to processing often results in non-uniform films with low crystallinity. Most research has focused on formamidinium tin triiodide (FASnI3), while methylammonium tin triiodide (MASnI3), with an optical bandgap of 1.2–1.3 eV and light absorption in the 300–1100 nm range, has been less explored due to its instability. Here, we demonstrate that substituting A-site cations (Cs and Rb) and X-site halides (Cl) in MASnI3 significantly enhances its stability, improving crystallinity and reducing trap density. PD devices with modified MASnI3 exhibit enhanced photo-response across the visible to NIR region, achieving specific detectivity over 1.7 × 1012 Jones at 940 nm, with a fast response time (trise/tfall = 3.85 μs/5.70 μs) under low irradiance of 0.104 mW cm−2. © 2025 Elsevier B.V.

关键词： Photodetectors

来源：评论

学校读者我要写书评

暂无评论

A Thermally Stable, Infrared-Transparent High-Sulfur-Containing Polymer for High Aspect-Ratio nanostructured MWIR Polarizer

引用

Small 2025年 e2504090页

作者： Kang, Minjeong Jang, Wontae Lee, Junghyun Kim, Sanghyun Lee, Gyuwon Choi, Keonwoo Kim, Jun Oh Ku, Zahyun Ahn, Junhyoung Lim, Hyungjun Lim, Jeewoo Wie, Jeong Jae Im, Sung Gap Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak-ro Yuseong-gu Daejeon 34141 South Korea Advanced Instrumentation Institute Korea Research Institute of Standards and Science 267 Gajeong-ro Yuseong-gu Daejeon 34113 South Korea Apex Microdevices 4871 Misrach Ct West Chester 45069 OH United States Department of Nano Manufacturing Technology Korea Institute of Machinery & Materials (KIMM) 156 Gajeongbuk-ro Yuseong-gu Daejeon 34103 South Korea Department of Chemistry and Research Institute for Basic Science Kyung Hee University 26 Kyungheedae-ro Dongdaemun-gu Seoul 02447 South Korea Human-Tech Convergence Program Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul 04763 South Korea Department of Chemical Engineering State University of New York College of Environmental Sciences and Forestry Syracuse NY 13210 United States Graduate school of Semiconductor Technology Korea Advanced Institute of Science and Technology (KAIST) 291 Daehak-ro Yuseong-gu Daejeon 34141 South Korea

Infrared (IR) polarizer is essential for thermal imaging applications such as mobility and military operations. High-sulfur-containing polymers have emerged as promising candidates for IR polarizers due to their mid-wave IR (MWIR) transparency, addressing the limitations of inorganic materials, including their brittleness and high cost. However, poor thermal stability and limited IR range restrict their applicability. This study introduces a glassy IR polarizer based on poly(sulfur-co-hexavinyl disiloxane) (pSHVDS), a highly crosslinked sulfur-rich polymer synthesized via sulfur chemical vapor deposition (sCVD). Self-crosslinking of pSHVDS at high temperatures provided thermal stability during nanoimprint lithography, enabling the fabrication of high-fidelity nano-grating patterns (400 nm pitch, 150 nm width, 300 nm height). The broad transmittance and high aspect ratio of the nanopattern enabled the glassy-pSHVDS MWIR polarizer to achieve over 50% transmittance of transverse magnetic field (T_TM) and an extinction ratio (ER) exceeding 6000 across a broad IR range (3-8 µm). An additional pSHVDS anti-reflection coating further enhanced T_TM to 84% and ER to 7200 at a wavelength of 4 µm, the highest ER reported for organic MWIR polarizers to date. The polarizer maintained its performance after 24 h at 100 °C, demonstrating exceptional thermal stability. These findings underscore the potential of glassy pSHVDS-based polarizers for IR applications. © 2025 Wiley-VCH GmbH.

关键词： bilayer wire grid polarizer high sulfur-content polymer (HSCP) MWIR polarizer sulfur chemical vapor deposition (sCVD) thermal stability

来源：评论

学校读者我要写书评

暂无评论

Enhancement of High-Voltage DC Insulation Performance and Mechanical Properties in Polypropylene nanocomposites with Silane-Coated MgO

引用

Macromolecular Chemistry and Physics 2025年

作者： Kim, Young Nam Kim, Minah Yoon, Somi Kim, Yebom Choi, Yong-Seok Lee, Seung Jun Wie, Jeong Jae Yoon, Ho Gyu Jung, Yong Chae RAMP Convergence Research Center Korea Institute of Science and Technology (KIST) 92 Chudong-ro Bongdong-eup Jeonbuk Wanju-gun 55324 South Korea Department of Materials Science and Engineering Korea University 145 Anam-ro Seoul Seongbuk-gu 02841 South Korea ILJIN Electric Co. Ltd. 905-64 Mannyeon-ro Gyeonggi-do Hwaseong-si 18365 South Korea Department of Organic and Nano Engineering Hanyang University 222 Wangsimni-ro Seoul Seongdong-gu 04763 South Korea Hyunday Engineering Plastic (HDC) 1221-32 Daehoman-ro Seokmun-myeon Chungcheongnam-do Dangin-shi 31703 South Korea Human-Tech Convergence Program Hanyang University 222 Wangsimni-ro Seoul Seongdong-gu South Korea Department of Chemical Engineering State University of New York College of Environmental Science and Forestry 1 Forestry Drive Syracuse 13210 NY United States

In this study, magnesium oxide (MgO) is introduced as an inorganic oxide filler to utilize polypropylene (PP) as an insulating material, and silane (SiO₂) coating is applied to the surface of the nanoparticles to simultaneously improve the insulating properties and mechanical properties in a high-voltage direct current (HVDC) environment. First, MgO particles with an average particle diameter of ≈200–250 nm are surface-modified by silane treatment (MgO@SiO₂) and compounded with PP matrix by biaxial melt compounding process. XPS and FT-IR analysis confirmed the effective silane coating on the surface of MgO particles, while STEM-EDX and XRM analysis visually demonstrated that the coated MgO@SiO₂ is uniformly dispersed inside the PP. In terms of mechanical properties, such as tensile strength, bending strength, and strain at break, the PP/MgO@SiO₂ insulation composites show superior results compared to neat PP and PP/MgO insulation composites, which are attributed to the increased interfacial affinity and improved filler dispersion due to the silane coating. In addition, the PP/MgO@SiO₂ sample exhibits the highest value for direct current breakdown dielectric strength (DCBD), confirming that it can realize stable insulation performance in a high field. © 2025 Wiley-VCH GmbH.

关键词： DCBD HVDC MgO polypropylene silane coated

来源：评论

学校读者我要写书评

暂无评论

organic X-Ray Image Sensors Using a Medium Bandgap Polymer Donor with Low Dark Current

引用

Energy & Environmental Materials 2024年第6期7卷 230-237页

作者： Jong-Woon Ha Seung Hun Eom Bo Kyung Cha Seyeong Song Hyeong Ju Eun Jong H.Kim Jong Mok Park BongSoo Kim Byoungwook Park Seo-Jin Ko Sung Cheol Yoon Changjin Lee In Hwan Jung Do-Hoon Hwang Department of Chemistry Chemistry Institute for Functional MaterialsPusan National UniversityBusan 46241Korea Division of Advanced Energy Materials Research Center Korea Research Institute of Chemical Technology(KRICT)Daejeon 34114Korea Electro-Medical Device Research Center Korea Electrotechnology Research Institute(KERI)Ansan 15588Korea Graduate School of Carbon Neutrality School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology(UNIST)Ulsan 44919Korea Department of Molecular Science and Technology Ajou UniversitySuwon 16449Korea Research Center for Advanced Specialty Chemicals Korea Research Institute of Chemical TechnologyUlsan 44412Korea Department of Chemistry Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Korea Department of Organic and Nano Engineering Human-Tech Convergence ProgramHanyang University222 Wangsimni-roSeongdong-guSeoul 04763Korea

The development of portable X-ray detectors is necessary for diagnosing fractures in unconscious patients in emergency ***,this is quite challenging because of the heavy weight of the scintillator and silicon *** weight and thickness of X-ray detectors can be reduced by replacing the silicon layer with an organic *** study presents a novel bithienopyrroledione-based polymer donor that exhibits excellent photodetection properties even in a thick photoactive layer(~700 nm),owing to the symmetric backbone and highly soluble molecular structure of *** ability of bithienopyrroledione-based polymer donor to strongly suppress the dark current density(Jd~10−10 A cm^(−2))at a negative bias(−2.0 V)while maintaining high responsivity(R=0.29 A W−1)even at a thickness of 700 nm results in a maximum shot-noise-limited specific detectivity of D_(sh)^(*)=2.18×10^(13)Jones in the organic *** organic photodetectors are developed by slot-die coating for use in X-ray detectors,which exhibit D_(sh)^(*)=2.73×10^(12)Jones with clear rising(0.26 s)and falling(0.29 s)response times upon X-ray *** reliability is also proven by linear response of the X-ray detector,and the X-ray detection limit is 3 mA.

关键词： low dark current low detection limit organic photodetector printable X-ray

来源：评论

学校读者我要写书评

暂无评论

Interfacial engineering Using Additive Manufacturing to Decouple Electrical and Thermal Conductivity for Next-Generation Thermoelectrics

SSRN

引用

SSRN 2023年

作者： Madan, Deepa Huang, Jiyuan Ambade, Rohan B. Brooks, Ben Lombardo, Jacob Poosapati, Aswani Banerjee, Priyanshu Saeidi-Javash, Mortaza Zhang, Yanliang Department of Mechanical Engineering University of Maryland Baltimore County BaltimoreMD21250 United States Department of Organic and Nano Engineering Hanyang University Seoul04763 Korea Republic of Human-Tech Convergence Program Hanyang University Seoul04763 Korea Republic of Department of Mechanical and Aerospace Engineering California State University Long Beach Long BeachCA90840 United States Department of Aerospace and Mechanical Engineering University of Notre Dame Notre DameIN46556 United States

Additive manufacturing has been investigated as a more time, energy, and cost-efficient method for fabricating thermoelectric generators (TEGs). Early results have been promising but are held back by the necessary inclusion of a high-temperature, long-duration curing process to produce high-performance thermoelectric (TE) films. This work investigates the synergistic effect of four factors – a small amount of chitosan binder (0.05wt%), a heterogeneous particle size distribution, the application of mechanical pressure, and thickness variation – on the performance of p-Bi0.5Sb1.5Te3 (p-BST) and n-Bi2Te2.7Se0.3 (n-BTS) TE composite films. The combination of these four factors controls the micro and nanostructure of the films to decouple their electrical and thermal conductivity effectively. This resulted in figures of merit (ZTs) (0.89 and 0.5 for p-BST and n-BTS, respectively) comparable to other additive manufacturing methods despite eliminating the high-temperature, long-duration curing process. The process was also used to fabricate a 6-couple TEG device which could generate 357.6 µW with a power density of 5.0 mW/cm2 at a ∆T of 40 K. The device demonstrated air stability and flexibility for 1000 cycles of bending. Finally, the device was integrated with a voltage step-up converter to power a LED and charge and discharge capacitor at a ∆T of 17 K, demonstrating its applicability as a self-sufficient power source. © 2023, The Authors. All rights reserved.

关键词： Thermal conductivity

来源：评论

学校读者我要写书评

暂无评论

Facile Manufacturing of Foldable Micro-Supercapacitors Utilizing Pneumatic Printing in Conjunction with Intense Pulsed White Light

SSRN

引用

SSRN 2024年

作者： Song, Chiho Hwang, Jeonguk Park, Changyoung Lee, Sujin Hwang, Yeon-Taek Kim, Hak-Sung Bansal, Neetu Salunkhe, Rahul R. Ahn, Heejoon Human-Tech Convergence Program Department of Organic and Nano Engineering Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Department of Organic and Nano Engineering Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Department of Mechanical Engineering Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Department of Physics Indian Institute of Technology Jammu Jammu and Kashmir181221 India Department of Battery Engineering Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Institute of Nano Science and Technology Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of

The rapid development of foldable and rollable displays and electronic devices has aggravated the need for flexible and miniaturized energy-storage devices, such as micro-supercapacitors (MSCs). Existing devices have several shortcomings, such as high cost of materials, high energy consumption, and complicated fabrication methods. This study introduces a straightforward method for fabricating flexible MSCs based on reduced graphene oxide (rGO) and manganese oxide utilizing a printing technique and intense pulsed white light (IPWL) technology. Using this method, asymmetric microelectrodes can be easily printed on a flexible polymeric substrate, and rGO and manganese oxide can be quickly synthesized under atmospheric pressure at room temperature via irradiation with IPWL. An asymmetric hybrid-type structure composed of rGO-based carbon materials and synthesized manganese mono-oxide exhibits an areal capacitance of 5.1 mF cm-2 and an energy density of 3 μWh cm-2 at a power density of 0.1 mW cm-2. The developed flexible MSCs worked well at various radii of curvature, even under the extreme bending condition of 1 mm radius of curvature, demonstrating excellent areal capacitance retention of up to 99.4% even after 10,000 repetitive bending cycles. © 2024, The Authors. All rights reserved.

关键词： Supercapacitor

来源：评论

学校读者我要写书评

暂无评论

Investigation of Cu2sns3 nanoparticles Decorated G-C3n4 nanocomposites for High Performance Battery-Type Hybrid Supercapacitors

SSRN

引用

SSRN 2024年

作者： Muthu, Senthilkumar Preethi, Raja V. Johny, Joyal Subalakshmi, K. Sridharan, Moorthy Babu Lee, Kyu-Tae Park, Hui Joon Department of Organic and Nano Engineering Hanyang University Seoul04763 Korea Republic of Human-Tech Convergence Program Hanyang University Seoul04763 Korea Republic of Hanyang Institute of Smart Semiconductor Hanyang University Seoul04763 Korea Republic of Department of Chemistry Indian Institute of Technology- Madras Tamilnadu Chennai600036 India Advanced materials department Jožef Stefan Institute Jamova 39 Ljubljana Slovenia Department of Semiconductor Science Dongguk University-Seoul Seoul04620 Korea Republic of Crystal Growth Centre Anna University Tamilnadu Chennai600025 India Department of Physics Inha University Incheon22212 Korea Republic of

The hybrid-type of supercapacitors based on transition metal sulfides-carbon composite electrodes found to be a prominent and emerging technological advancement with beneficial characteristics larger surface area, high durability and unique charge storage mechanism. In this work, phase pure copper tin sulfide (Cu2SnS3) nanoparticles (NPs) and the nanocomposite of CTS NPs decorated graphitic carbon nitride (g-C3N4) CTS-gCN were prepared by inexpensive solvothermal approach. The CTS-gCN nanocomposite-based supercapacitors show high specific capacitance of 477 F/g at 1 A g-1 current density, which is much higher than the pristine CTS NPs based supercapacitors (362 F/g) in three electrode configurations. The asymmetric hybrid supercapacitors prepared with CTS-gCN and reduced graphene oxide (rGO) as a negative electrode. The electrochemical characteristics of asymmetric CTS-gCN//rGO supercapacitors exhibits battery-like behavior with specific capacitance of 108 F/g at the scan rate of 1 A g-1 with high energy density of 42 W h Kg-1 and power density of 835 W Kg-1. The CTS-gCN//rGO supercapacitors show excellent capacitance retention over 95% even after 1000 cycles. The obtained electrochemical results of the supercapacitors with high energy density, power density, wider potential window and cyclic stability suggests the CTS-gCN//rGO hybrid supercapacitors as a promising candidate for emerging electrochemical energy storage technologies. © 2024, The Authors. All rights reserved.

关键词： nanoparticles

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：