Article
Physics, Applied
Jun Yang, Amin Bahrami, Xingwei Ding, Sebastian Lehmann, Kornelius Nielsch
Summary: The study demonstrated a novel strategy for improving the mechanical and electrical properties of flexible silver nanowire thin films, utilizing ethanol mist welding at room temperature and aluminum-doped zinc oxide coating to achieve high transmittance and low sheet resistance. The addition of ultrathin antimony oxide film provided protection against water or oxygen degradation, maintaining conductivity after bending and chemical exposure. The integrated W-Ag NW/AZO/SbOx layer showed superior electrical stability on low-power operating flexible Ti-ZnO thin film transistors, with high field-effect mobility and I-on/I-off ratio.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Laetitia Bardet, Dorina T. Papanastasiou, Chiara Crivello, Masoud Akbari, Joao Resende, Abderrahime Sekkat, Camilo Sanchez-Velasquez, Laetitia Rapenne, Carmen Jimenez, David Munoz-Rojas, Aurore Denneulin, Daniel Bellet
Summary: This study investigates strategies to optimize the physical properties of silver nanowire (AgNW) networks, including comparing different morphologies for improved optical transparency and electrical conductivity, and examining the effects of protective oxide films on the network stability.
Article
Materials Science, Multidisciplinary
Eunmi Choi, Hayeong Kim, SeonJeong Maeng, Jaebaek Lee, Dae-Hwan Kim, Kyuyoung Heo, Ju-Young Yun
Summary: This study evaluated the thermal stability of CpZr(NMe2)(3), a precursor for depositing ZrO2 films, under thermal stress and found that dimethylamine and trimethylamine are generated during heating, which affect the film growth and properties. By adjusting the precursor's vapor pressure, films with different characteristics can be formed under the same process conditions, but this compromises the device's reliability. Therefore, studying precursor decomposition is crucial for developing new precursors and highly reliable thin films and devices.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Ashley R. R. Bielinski, Ethan P. P. Kamphaus, Lei Cheng, Alex B. F. Martinson
Summary: In this study, in situ pyroelectric calorimetry and spectroscopic ellipsometry were used to investigate the surface reactions in atomic layer deposition of zirconium oxide. The results revealed that the reaction heat is dependent on factors such as growth rate, equilibrium surface hydroxylation, and extent of the reaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Ceramics
Yujie Zhao, Xiao Wang, Quan-an Li, Xinyu Zhang, Ye Li, Rong-Jun Xie, J. Ruud van Ommen, H. T. Hintzen
Summary: Depositing nano-sized Al2O3 film around each BaSi2O2N2:Eu2+ particle through atomic layer deposition (ALD) can improve its thermal stability and inhibit oxidation. The Al2O3 coated phosphor showed an increased oxidation temperature and reduced degradation under water-steam conditions. White light-emitting diodes (wLEDs) fabricated with the Al2O3 coated phosphor also exhibited a significantly higher luminous flux.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
T. Kavinkumar, Selvaraj Seenivasan, Amarnath T. Sivagurunathan, Yongchai Kwon, Do-Heyoung Kim
Summary: The rational design and development of novel electrode materials with promising nanostructures can effectively improve supercapacitive performance. By using atomic layer deposition, high-performance electrode materials were developed, showing excellent specific capacity and cycling stability. The demonstrated potential of ALD in next-generation supercapacitors is highlighted by the high energy density and exceptional capacity retention of the assembled supercapattery cell.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Catherine J. Nachtigal, Yi Li, Li Zhang, Lin Lei, Mark D. Losego, Jonathan P. Singer
Summary: This study investigates an affordable method for obtaining micro/nanostructured surfaces using electrospray deposition (ESD) technique. By using this method, methylcellulose (MC) can form nanowire coatings, but is easily destroyed by water exposure. In order to enhance stability, the researchers explore the use of atomic layer deposition (ALD) to coat the MC nanostructures with Al2O3, resulting in superhydrophobicity upon subsequent heating. It is found that the size of the MC nanowires affects the trade-off between mechanical stability and hydrophobicity of the coated structures.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Vasu Prasad Prasadam, Ali Margot Huerta Flores, Jean-Nicolas Audinot, Naoufal Bahlawane
Summary: Solar-driven water splitting is a promising way to obtain clean H-2 energy, and the photoelectrochemical approach has attracted significant interest. The oxygen evolution reaction is seen as the stage that limits performance in this technology, highlighting the need for innovative anode materials. Metal oxide semiconductors are relevant in this respect due to their cost-effectiveness and widespread availability. In this study, a combination of chemical vapor deposition and atomic layer deposition was used to synthesize randomly oriented CNT-ZnO core-shell nanostructures, forming a porous coating that adheres well. Compared to directly coated ZnO on Si, the porous structure allows for a larger interface area with the electrolyte, resulting in a 458% increase in photocurrent density under simulated solar light. The photoelectrochemical characterization attributes this performance enhancement to the effective electron withdrawal along the carbon nanotubes (CNTs), leading to a decrease in the onset potential. As for durability, the CNT-ZnO core-shell structure exhibits enhanced photo-corrosion stability for 8 hours under illumination and with a voltage bias.
Article
Materials Science, Multidisciplinary
Zhenfeng Li, Zihan Li, Zhiyuan Shi, Pengyu Zhu, Zixu Wang, Jia Zhang, Yang Li, Peng He, Shuye Zhang
Summary: UV detectors have significant applications in military, natural disaster warning, biomedical detection, etc. This paper focuses on improving the performance of ZnO-based UV detectors by modifying ZnO thin films. By controlling the oxygen vacancy defects and improving the crystallinity of ZnO films through heat treatment, the detectors achieved the best comprehensive performance.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Krystelle Lionti, Noel Arellano, Nicholas Lanzillo, Son Nguyen, Prasad S. Bhosale, Holt Bui, Teya Topuria, Rudy J. Wojtecki
Summary: Area-selective depositions have gained attention for their potential advantages in device fabrication. A study reported the synthesis of an organic inhibitor that enables selective deposition of TaN films at high temperatures. The method showed successful results on patterned substrates and demonstrated the compatibility of various inhibitors.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Danhui Zhang, Ruquan Liang, Houbo Yang, Yuanmei Song, Jianhui Shi, Dengbo Zhang, Zhongkui Liu, Anmin Liu
Summary: This paper demonstrates the process of combining polyacetylene with silver nanowire to form core-shell nanoclusters using molecular dynamic simulations. The influence of silver nanowire thickness on nanocluster formation and the significant role of van der Waals force in the fabrication process are observed. Factors affecting the process and other metal nanoclusters induced by polyacetylene are also discussed in detail.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Muhammad Hamid Raza, Roberto Di Chio, Kaveh Movlaee, Patrick Amsalem, Norbert Koch, Nicolae Barsan, Giovanni Neri, Nicola Pinna
Summary: Heterostructures made from metal oxide semiconductors (MOS) are crucial for high-performance gas sensors. This study explores the transduction mechanism of heterostructured nanomaterials and relates the sensing response to the MOS shell or the p-n heterojunction. The use of carbon nanotubes as conductive substrates enables the devices to operate at low temperature. The findings are important for the development of next generation gas sensing devices.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Rachel Cherry, Joseph Joel Muhanga, Hamed Mehrabi, Samuel K. Conlin, Robert H. Coridan
Summary: Nanostructured dielectric overlayers can enhance light absorption in nanometer-thin films for optoelectronic applications. By self-assembling a monolayer of polystyrene nanospheres, a core-shell polystyrene-TiO2 structure is grown at temperatures below the polystyrene glass-transition temperature using atomic layer deposition. This tailor-made nanostructured overlayer can significantly increase light absorption in thin film light absorbers.
Article
Nanoscience & Nanotechnology
Violetta Kalancha, Albert These, Lilian Vogl, Ievgen Levchuk, Xin Zhou, Maissa Barr, Mark Bruns, Julien Bachmann, Sannakaisa Virtanen, Erdmann Spiecker, Andres Osvet, Christoph J. Brabec, Karen Forberich
Summary: Transparent electrodes consisting of silver nanowires (Ag NWs) protected by a tin oxide (SnOx) shell exhibit unprecedented thermal stability, withstanding high temperatures up to 500 degrees C. An optimized synthesis method and a wet chemical reaction to form the SnOx shell enable the fabrication of highly conductive and transparent electrodes.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Physical
Zhijiang Guo, Xiaoli Li, Ning Li, Xuanji Liu, Haojie Li, Xuezhi Li, Yuxuan Wang, Jianguo Liang, Zhanchun Chen
Summary: This study presents a method of directional arrangement of silver nanowires (AgNWs) to prepare conductive films by using shear force generated during the Mayer rod coating process. The prepared multilayer crossed three-dimensional (3D) AgNW conductive network exhibits excellent electrical and optical properties, as well as low surface roughness, excellent bending resistance, and environmental stability. This adjustable coating method is simple and scalable, which is important for the future development of flexible transparent conductive films.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Engineering, Environmental
Yeosang Yoon, Huijae Park, Jinwoo Lee, Joonhwa Choi, Yeongju Jung, Seonggeun Han, Inho Ha, Seung Hwan Ko
Summary: In this study, a soft thermo-pneumatic actuating module based on a soft thermoelectric device is developed, which utilizes bi-directional thermal management to control the inflation and deflation of the pneumatic chamber. Active cooling functionality of the thermoelectric device is demonstrated, reducing operating time. Different motions are achieved through assembly design for practical usage in soft robotics.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Biomedical
Phillip Won, Stephen Coyle, Seung Hwan Ko, David Quinn, K. Jimmy Hsia, Philip LeDuc, Carmel Majidi
Summary: Liquid metal embedded elastomers (LMEEs) are stretchable composites with unique properties that make them appealing for flexible electronics and soft robotics. This study investigates the biocompatibility and cell cytotoxicity of LMEE composites in contact with C2C12 cells. The influence of EGaIn volume ratio and synthesis parameters on cell proliferation and viability is examined, as well as the case of electrically-conductive LMEE composites.
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Chemistry, Physical
Yeongju Jung, Inho Ha, Minwoo Kim, Jiyong Ahn, Jinwoo Lee, Seung Hwan Ko
Summary: The study presents an advanced thermal skin (ATS) for thermal management of wearable devices. The ATS exhibits both high thermal diffusivity and thermal storage capability, providing protection for the skin and absorbing the heat released from the device. This research makes significant contributions to the future heat management of wearable devices.
Article
Engineering, Electrical & Electronic
Kyun Kyu Kim, Min Kim, Kyungrok Pyun, Jin Kim, Jinki Min, Seunghun Koh, Samuel E. Root, Jaewon Kim, Bao-Nguyen T. Nguyen, Yuya Nishio, Seonggeun Han, Joonhwa Choi, C-Yoon Kim, Jeffrey B. -H. Tok, Sungho Jo, Seung Hwan Ko, Zhenan Bao
Summary: With the help of machine learning, electronic devices such as gloves and skins can track human hand movements and recognize objects and gestures. However, these devices are bulky and cannot adapt to the body's curvature. This study introduces a substrate-less nanomesh receptor coupled with unsupervised meta-learning framework, allowing user-independent recognition of various hand tasks with minimal labeled data.
NATURE ELECTRONICS
(2023)
Review
Chemistry, Multidisciplinary
Jinki Min, Yeongju Jung, Jiyong Ahn, Jae Gun Lee, Jinwoo Lee, Seung Hwan Ko
Summary: As environmental issues have become more serious, the need for green and biodegradable electronics has increased. Recent advancements in biodegradable conductive materials have enabled the development of next-generation electronics. These promising green materials have been applied to practical applications. This review summarizes various sensor devices based on biodegradable conductive materials.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Youngchan Kim, Jaemook Lim, Ji Hwan Lim, Eunseung Hwang, Hyunkoo Lee, Minwoo Kim, Inho Ha, Hyunmin Cho, Jinhyeong Kwon, Junho Oh, Seung Hwan Ko, Heng Pan, Sukjoon Hong
Summary: A supersaturated solution-based physical unclonable function (S-PUF) is proposed, which generates multilevel cryptographic keys and enables a faster authentication process by controlling temperature distribution and crystal size. Additionally, the cryptographic keys can be repeatedly reconfigured, offering new possibilities for a recyclable anti-counterfeiting platform.
ADVANCED MATERIALS
(2023)
Review
Optics
Minjae Lee, Gwansik Kim, Yeongju Jung, Kyung Rok Pyun, Jinwoo Lee, Byung-Wook Kim, Seung Hwan Ko
Summary: Radiative cooling is a passive cooling technology that does not require energy consumption and is capable of dissipating waste heat into the surroundings. Recent advancements in photonic technologies have enabled the use of radiative cooling during daytime. This review article discusses the fundamental principles of thermodynamic heat transfer, various photonic structures, and their integration with new functionalities to enhance the efficiency of radiative cooling. Commercial applications and future perspectives are also summarized.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Brian W. Blankenship, Runxuan Li, Ruihan Guo, Naichen Zhao, Jaeho Shin, Rundi Yang, Seung Hwan Ko, Junqiao Wu, Yoonsoo Rho, Costas Grigoropoulos
Summary: Biological nervous systems rely on complex, dynamic connectivity among billions of neurons, while artificial intelligence and neuromorphic computing platforms seek to mimic biological cognition. To incorporate the advantages of tunable dynamic software implementations into hardware, researchers have developed an artificial synapse with adaptable resistivity.
Article
Chemistry, Multidisciplinary
Yeongju Jung, Seongmin Jeong, Jiyong Ahn, Jinwoo Lee, Seung Hwan Ko
Summary: This study proposes a Janus structure-based stretchable and breathable thermoelectric skin with radiative cooling (RC) and solar heating (SH) functionalities for sustainable energy harvesting. The dual-sided structure maximizes the thermal gradient between the body and the surrounding environment, allowing the device to switch modes and optimize electricity generation. The use of boron nitride-polydimethylsiloxane (BP) and graphene nanoplatelet-polydimethylsiloxane (GP) nanofiber (NF) substrates contribute to the development of this wearable power source.
Review
Nanoscience & Nanotechnology
Yeongju Jung, Minwoo Kim, Taegyeom Kim, Jiyong Ahn, Jinwoo Lee, Seung Hwan Ko
Summary: This paper reviews the recent progress of functional materials and devices that contribute to thermoregulatory wearables, particularly emphasizing the strategic methodology to regulate body temperature. The research has found that heat transfer can be impeded by using thermally insulating materials with extremely low thermal conductivity or directly cooling and heating the skin surface. The studies are classified into passive and active thermal management modes and further subdivided into specific strategies.
NANO-MICRO LETTERS
(2023)
Article
Multidisciplinary Sciences
Seongmin Jeong, Jinhyeok Oh, Hongchan Kim, Joonbum Bae, Seung Hwan Ko
Summary: As the wearable heater becomes increasingly popular, there is a need to improve its tensile stability. However, maintaining stability and precise control of heating in these heaters remains challenging due to multiaxial dynamic deformation with human motion. In this study, a pattern study for a circuit control system was proposed, which showed the significance of input power per unit area for steady average temperature with tension. A wearable heater with minimal resistance change regardless of tension direction was developed using Peano curves and sinuous pattern structure, and it demonstrated stable heating in actual motion.
Article
Chemistry, Physical
Yeongju Jung, Kyung Rok Pyun, JinKi Min, Hyeokjun Yoon, Minjae Lee, Byung-Wook Kim, Jinwoo Lee, Seung Hwan Ko
Summary: In this study, an Ag-Au-PANI multilayered core-shell nanowire network was fabricated and used as an electrochromic supercapacitor and visible-to-infrared multispectral display. The highly conductive nanowire network electrode was created by laminating silver nanowires with gold and laser sintering. By electrodeposition of PANI, the metallic nanowire network was functionalized to operate as an electrochromic supercapacitor device. The unique redox processes of PANI allowed the electrochromic supercapacitor to display the energy storage level through visible color and temperature.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Deyong Zheng, Huihui Jin, Yucong Liao, Pengxia Ji
Summary: In this study, a highly stable and efficient catalyst, fluorine-doped Co3O4 (F-Co3O4), was developed for hydrogen production by water electrolysis. The F-Co3O4 catalyst exhibited a remarkable reduction in overpotential and demonstrated excellent stability for over 100 hours.
Article
Materials Science, Multidisciplinary
Ziwen Lv, Jintao Wang, Fengyi Wang, Jianqiang Wang, Fuquan Li, Hongtao Chen
Summary: Adding Cu6Sn5 nano particles can effectively inhibit the overgrowth of intermetallic compounds at the interfaces of solder joints in electronic devices, providing a solution to this issue. A new growth mechanism of intermetallic compounds at the interfaces was identified.
Article
Materials Science, Multidisciplinary
Jun Wang, Jiawei Chen, Wanru Liao, Fangyang Liu, Min Liu, Liangxing Jiang
Summary: A BiOI/AgI/Ag plasmonic heterostructure photocathode was successfully designed through electrodeposition, ion-exchange, and illumination methods. This photocathode exhibits superior performance in photoelectrochemical water splitting.
Article
Materials Science, Multidisciplinary
Xiaoxiao Liu, Xianxian Zhou, Xiaotao Ma, Qinbo Yuan, Shibin Liu
Summary: In this study, the authors propose a method to accelerate the reaction of polysulfides in lithium-sulfur batteries using a Ni@OC Mott-Schottky heterojunction as a catalyst. The experimental results demonstrate that the charge redistribution at the Ni@OC interface accelerates electron transfer and enhances catalytic activity, leading to improved reaction kinetics and battery performance.
Article
Materials Science, Multidisciplinary
Dayou Ma, Mohammad Rezasefat, Joziel Aparecido da Cruz, Sandro Campos Amico, Marco Giglio, Andrea Manes
Summary: The matrix has a significant effect on the impact resistance of composite materials. Replacing a brittle polymer with a more flexible one can improve impact resistance, but it poses challenges to standard testing methods. This study designs a new fixture for testing the low-velocity impact of soft composites and investigates the effect of the fixture on the mechanical performance.
Article
Materials Science, Multidisciplinary
Lingchang Wang, Qihang Yang, Huzhen Li, Ming Wei, Qian Wang, Zhenzhong Hu, Mengmeng Zhen
Summary: Bronze titanium dioxide (TiO2(B)) is a promising anode material for lithium-ion batteries due to its high specific capacity. However, its practical applications are hindered by poor conductivity and limited electrochemical kinetics. In this study, TiO2(B)-carbon nanosheets heterostructures are synthesized to enhance the cycling performance and rate capability of TiO2(B).
Article
Materials Science, Multidisciplinary
Atul Thakur, Ritesh Verma, Ankush Chauhan, Fayu Wan, Preeti Thakur
Summary: In this study, BaFe12O19 and BaFe12O19: Epoxy (50:50) nanocomposites were synthesized using the co-precipitation method. The structural information and material properties, such as crystallite size and electrical conductivity, were characterized by XRD, FESEM, EDX, and TEM techniques.
Article
Materials Science, Multidisciplinary
Jingyu Wu, Xinyan Ma, Yong Yang
Summary: A well-defined CoS2@NC(CS-500) hierarchical binder-free catalyst cathode is constructed through in-situ grown of ZIF-67 on carbon cloth and high-temperature carbonization. The cathode shows excellent reaction kinetics and electrochemical performance, providing inspiration for developing advanced Li-CO2 battery catalysts.
Article
Materials Science, Multidisciplinary
Svetlana M. Posokhova, Vladimir A. Morozov, Kirill N. Boldyrev, Dina Deyneko, Erzhena T. Pavlova, Bogdan I. Lazoryak
Summary: This study explores the impact of synthesis method and composition on the structure and luminescence properties of K5Eu1-xHox(MoO4)4 with the palmierite-type matrix. The co-doping of Eu3+ and Ho3+ ions plays a critical role in manipulating charge transfer and luminescence efficiency in the visible and infrared regions.
Article
Materials Science, Multidisciplinary
Jian Wang, Yeting Tao, Jingsheng Wang, Youtian Tao
Summary: A new electron-transport material iTPyBI-CN is developed through non-catalytic C-N coupling reaction. It exhibits better electroluminescence efficiency in organic light-emitting diodes compared to the commercial material TPBI, due to its twisted geometry and higher energy levels.
Article
Materials Science, Multidisciplinary
Tao Zhu, Feng Huang, Shuo Li, Yang Zhou
Summary: This article combines XRD analysis and microscopic structural observation to investigate the changes in limestone after high-temperature treatment. It finds that 500 degrees C is the critical temperature for crystalline and spatial arrangement changes in limestone, and the thermal conductivity, specific heat capacity, and heat storage coefficient gradually decrease after thermal treatment.
Article
Materials Science, Multidisciplinary
Muhammad Haekal Habibie, Fransiska Sri Herwahyu Krismastuti, Abdi Wira Septama, Faiza Maryani, Vivi Fauzia
Summary: This study focuses on the synthesis of zinc oxide nanostructure from zinc recovered from galvanization ash and highlights its potential as a sustainable source of zinc and as an antibacterial agent.
Article
Materials Science, Multidisciplinary
Jingyi Li, Yixin Xing, Wei Gu, Shousi Lu
Summary: In this study, PC@CaP microparticles were fabricated using biomimetic mineralization. The results showed that under environmental stress, PC@CaP exhibited improved stability and antioxidative activity, indicating its potential use in high-added value fields.
Article
Materials Science, Multidisciplinary
Yan Liu, Shunyou Chen
Summary: In this study, TNTs were used as a drug carrier and modified with ZIF-8 and silk fibroin to obtain a new drug loading platform. The results showed that this drug-loaded platform had a good drug release effect in vitro and could promote cell proliferation and osteogenic differentiation.
Article
Materials Science, Multidisciplinary
Chunhui Zhu, Wentao Wang, Qing Zhen, Xinning Huang, Shixin Li, Shaochang Wang, Xiaoping Ma, Xiaoxia Liu, Yalong Jiao, Kai Sun, Zhuangzhi Li, Huaixin Yang, Jianqi Li
Summary: A type of stacking fault is revealed in e-InSe crystal, which is associated with a small stacking-fault energy and shows exceptional plasticity.
