Article
Materials Science, Coatings & Films
Zhong Zhang, Yaxin Meng, Haitao Niu, Hua Zhou
Summary: A one-step clean coating process has been developed to produce fluorine-free and colorful superhydrophobic surface coating with outstanding color fastness and self-healing property. The coating system comprises cycloolefin copolymer polymer (COC), hexadecyltrimethoxysilane (HDTMS), hydrophobic functionalized TiO2 nanoparticulates and dyeing pigments. The coating shows excellent color fastness and strong bonding strength, and its original superhydrophobicity can be restored from chemical or physical damages.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Biochemical Research Methods
Clara Markert, Marco Thinius, Laura Lehmann, Chris Heintz, Florian Stappert, Walter Wissdorf, Hendrik Kersten, Thorsten Benter, Bradley B. Schneider, Thomas R. Covey
Summary: Charged droplets generated by electrospray ionization (ESI) can penetrate into the inlet system of atmospheric pressure ionization mass spectrometer (API-MS) as a general phenomenon observed in various instruments under common spray conditions.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2021)
Review
Chemistry, Multidisciplinary
Viswanathan S. Saji
Summary: Electrophoretic deposition is a commonly studied surface coating technique used in various applications, while superhydrophobic surfaces have attracted significant research interest. This comprehensive review provides insights into the electrophoretic-deposited superhydrophobic coatings, covering processes, materials, and specific applications in fields such as anti-corrosion and biomedical applications.
CHEMISTRY-AN ASIAN JOURNAL
(2021)
Article
Chemistry, Physical
Shu-Rong Gao, Jia-Xin Jin, Bo-Jian Wei, Dian-Ji Lin, Xin Wang, Lin-Zhe Zhang, Yan-Ru Yang, Xiao-Dong Wang
Summary: The study investigates the dynamic behaviors of two droplets impacting an inclined superhydrophobic substrate and identifies three rebound patterns. The inclination angle has opposite effects on the rebound dynamics, impacting the contact time of the droplets significantly. The position of the droplets and the inclination angle play a crucial role in determining the rebound patterns and contact time.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Materials Science, Multidisciplinary
Guanghao Chen, Youjiang Xu, Bingzhen Zhang, Yuyang Zhou, Sian Wang, Yilan Meng, Liu Huang, Jinlong Song
Summary: The adhesion and subsequent icing of cold water on the insulation layers of dam coated with porous and hydrophilic concrete coating in a freezing environment might result in a severe ice pullout phenomenon. Although many superhydrophobic concrete (SC) coatings have been developed, their poor adhesive strength with the insulation layers has limited their application in protecting the insulation layers. Therefore, a novel superhydrophobic polymer concrete (SPC) coating was developed in this study by adding polyacrylate emulsion (PAE) and stone protector, as well as covering with nylon mesh. The SPC coating exhibited good superhydrophobicity and had a higher adhesive strength with the insulation layer compared to the SC coating, showing better performance in insulation layer protection. Additionally, the SPC coating also possessed excellent surface robustness, anti-icing capacity, and self-cleaning property, making it a promising candidate for insulation layer protection.
Article
Biophysics
Csaba Buga, Chun-Cheng Chen, Matyas Hunyadi, Attila Csik, Csaba Hegedus, Shinn-Jyh Ding
Summary: An antibacterial and bioactive nanostructured calcium silicate (CaSi) layer on a titanium substrate was prepared, showing improved bonding strength after annealing and higher activity in terms of antibacterial efficacy and stem cell osteogenesis.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Thermodynamics
Yutong Wei, Sihang Gao, Wen Sun, Xiaomin Wu, Yanhui Feng, Fuqiang Chu
Summary: This study focuses on the photothermal superhydrophobic coating and discovers its significant effects on inhibiting frosting and promoting defrosting. By utilizing spontaneous droplet jumping and increasing surface temperature, the formation of frost layer can be delayed. Additionally, the coating can also shorten the time of frost melting and reduce the coverage of melting droplets. This research provides new insights for advanced anti-frosting technology.
APPLIED THERMAL ENGINEERING
(2024)
Article
Chemistry, Applied
Kai Yi, Shiyu Fu, Yanbo Huang
Summary: A nanocellulose-based multiple-functional coating with superhydrophobicity, abrasion resistance, acid resistance, and fluorescence was developed. The coating showed excellent stability in acid and salt solutions, as well as good friction resistance, folding resistance, self-cleaning, and corrosion resistance properties. It has potential applications as outer building materials, luminous decorative materials, and anti-counterfeiting materials.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Thermodynamics
Zeyu Liu, Yuying Yan
Summary: This study experimentally investigates the formation of deposition patterns during the evaporation of magnetic nanofluid droplets at different substrate temperatures. The experimental results show that as the temperature increases, the droplet evaporation exhibits uniform patterns, typical 'coffee ring' patterns, and dual ring patterns. The study also reveals the crucial role of Marangoni flow in the formation of secondary ring patterns.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Tian-Yu Zhang, Yu-Chen Zhang, Lin-Wei Mou, Min-Jie Liu, Li-Wu Fan
Summary: This study investigates the characteristics and influencing factors of condensation heat transfer on honeycomb-like superhydrophobic surfaces. The results indicate that the thermal conductivity of the substrate plays a significant role in the heat transfer performance and droplet dynamics during condensation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Physical
Xiaoqiang Zhang, Hongyue Chen, Zhijun Wang, Nan Wang, Duyang Zang
Summary: This study investigates the evaporation-driven crystallization in droplets of sodium acetate anhydrous (CH3COONa) aqueous solution deposited on superhydrophobic substrates, and reveals distinct crystallization behaviors between saturated and unsaturated droplets. Unsaturated droplets form a quasi-spherical crystal shell, while saturated droplets develop crystal legs between the droplet and substrate.
Article
Materials Science, Ceramics
Weiwei Han, Li Liu, Benrui Yu, Qingxia Zhu
Summary: Graphene oxide (GO)/hydroxyapatite (HA) composite coatings were successfully prepared on titanium substrates using electrophoretic deposition technology. The coating's microstructure, phase composition, adhesion strength, hydrophilicity, corrosion resistance, bioactivity, antibacterial activity, and biocompatibility were evaluated. The adhesive strength of the coating increased by 76% when the GO content increased from 0 wt% to 12 wt%, and the corrosion rate reached its minimum at (1.493 x 10-3mm/a) with 8 wt% GO. Biomineralization experiments demonstrated the excellent bioactivity of the GO/HA composite coatings. The water contact angle of the composite coatings increased from 20.6 degrees (0 wt% GO) to 38.1 degrees (12 wt% GO). The antibacterial rate of the coating with 5 wt% GO was 96.7%, but decreased to 25% after thermal treatment. In-vitro L929 cell culture experiments confirmed the biocompatibility of the composite coatings with 5 wt% GO.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Biomedical
Elena Prudnikov, Iryna Polishchuk, Andy Sand, Hanan Abu Hamad, Naama Massad-Ivanir, Ester Segal, Boaz Pokroy
Summary: Superhydrophobic coatings made from natural saturated fatty acids offer a safe and sustainable alternative to current coatings. These coatings, formed through deposition techniques, exhibit high water contact angles and low contact angle hysteresis. The specific fatty acid used and deposition technique affect the properties and morphology of the coatings. Additionally, the fatty acid coatings demonstrate thermal stability and antimicrobial properties, making them ideal for applications in various fields.
MATERIALS TODAY BIO
(2023)
Article
Biochemical Research Methods
Anatolii Spesyvyi, Jan Zabka, Miroslav Polasek, Ales Charvat, Jürgen Schmidt, Frank Postberg, Bernd Abel
Summary: The article introduces a device for generating charged ice particles in vacuum, produced by electrospraying ionized water at atmospheric pressure. The particles undergo evaporative cooling when transferred to vacuum and are filtered by two consecutive quadrupole mass filters. Velocity and charge of the particles are measured by a nondestructive image charge detector. This device allows the preparation of single particle beams with various size distributions and kinetic energies.
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
(2023)
Article
Materials Science, Coatings & Films
B. Swain, A. R. Pati, P. Mallick, S. S. Mohapatra, A. Behera
Summary: The study developed a superhydrophobic coating with excellent mechanical, chemical, and thermal resistance, high adhesion force, and abrasion resistance, which maintained thermal stability and chemical stability within a wide range of pH values while exhibiting superhydrophobicity.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Anton Nailevich Gafurov, Thanh Huy Phung, Beyong-Hwan Ryu, Inyoung Kim, Taik-Min Lee
Summary: In this research, an artificial intelligence model was developed and integrated with a roll-to-roll screen printing system to detect printing defects. The model achieved a validation mean Intersection over Union (IoU) of 95.1%, demonstrating its potential for reliability assessment in screen printing.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2023)
Article
Polymer Science
Thanh Huy Phung, Anton Nailevich Gafurov, Inyoung Kim, Sung Yong Kim, Kyoung Min Kim, Taik-Min Lee
Summary: This study proposes a fabrication process using R2R printing to create a hybrid device, solving challenges related to material processing efficiency, alignment, and vulnerability of the polymeric substrate. The device consists of insulating and conductive layers printed onto a PET film to produce the circuit. Additionally, a monitoring system was developed to collect and process data, advancing towards tools for big data analysis and forecasting.
Article
Chemistry, Physical
Chanho Shin, Lulu Yao, Haichen Lin, Ping Liu, Tse Nga Ng
Summary: This work studies a new gel polymer electrolyte (GPE) for photothermal supercapacitors operating over a wide temperature range. The GPE effectively improves ionic conductivity and reduces impurity diffusion, minimizing energy loss in hot environments. In cold settings, the devices are packaged with a photothermal conversion layer to increase cell temperature and enhance energy density. The combination of the improved GPE and photothermal conversion extends the operational time of a motor driven from a cold start by a supercapacitor, showing high-performance design for harsh environments.
ACS ENERGY LETTERS
(2023)
Article
Multidisciplinary Sciences
Lulu Yao, Kai Zheng, Nandu Koripally, Naresh Eedugurala, Jason D. Azoulay, Xinyu Zhang, Tse Nga Ng
Summary: Structural supercapacitors integrate load-bearing and energy-storage functions, resulting in weight savings and safety improvements. Strategies based on interfacial engineering were developed to enhance multifunctional efficiency. By coating carbon-fiber weaves with a stable conjugated redox polymer and reduced graphene oxide, the structural electrodes exhibited increased capacitance and tensile strength. The gradient configuration of the solid polymer electrolyte allowed for high ionic conductivity at the electrode-electrolyte interfaces and high mechanical strength for load support. The multilayer structural supercapacitors achieved state-of-the-art performance and demonstrated durability under mechanical loads.
Article
Chemistry, Multidisciplinary
Shaurya Arya, Yunrui Jiang, Byung Ku Jung, Yalun Tang, Tse Nga Ng, Soong Ju Oh, Kenji Nomura, Yu-Hwa Lo
Summary: In this study, a compact and easy-to-use model for colloidal quantum dot (CQD) devices is developed. By considering the properties of quantum dots, ligand binding, and the heterointerface between quantum dots and the electron transport layer, the model can accurately describe and optimize the performance of CQD devices.
Article
Chemistry, Multidisciplinary
Shuo-En Wu, Longhui Zeng, Yichen Zhai, Chanho Shin, Naresh Eedugurala, Jason D. Azoulay, Tse Nga Ng
Summary: Organic retinomorphic sensors, equipped with in-sensor processing to eliminate static backgrounds, are ideal for motion detection. The study focuses on the role of interfacial energetics in enhancing the inherent photoresponse of light-sensitive capacitors by promoting charge accumulation. Incorporating appropriate interfacial layers around the photoactive layer is crucial to extend the carrier lifetime, leading to improved detectivity and response speed compared to traditional photodiodes, thanks to the additional insulating layer. Integration of three retinomorphic sensors in a line array demonstrates efficient motion tracking capabilities.
Article
Materials Science, Multidisciplinary
Laura L. Becerra, Tarek Rafeedi, Sankaran Ramanarayanan, Ian Frankel, Juliana Miller, Alexander X. Chen, Yi Qie, Darren J. Lipomi, Harinath Garudadri, Tse Nga Ng
Summary: A portable venturi tube for measuring bidirectional respiratory flow is developed and correlated with pulmonary function. Capacitive foam sensors embedded into the wall of the device transduce pressure signals to provide differential pressure readings, extrapolating airflow rate. The 3D-printed spirometer tube, designed using the venturi effect, accurately measures tidal breathing, deep breathing, and peak expiratory flow rates, offering point-of-care diagnoses and potential improvements in respiratory illness care.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Editorial Material
Engineering, Electrical & Electronic
Chanho Shin, Tse Nga Ng
Summary: A skin-conformable system worn on the finger, combining optical sensors with memristors, is able to accurately categorize finger-written inputs in three-dimensional space.
NATURE ELECTRONICS
(2023)
Proceedings Paper
Computer Science, Hardware & Architecture
Kun Qian, Lulu Yao, Kai Zheng, Xinyu Zhang, Tse Nga Ng
Summary: Millimeter-wave backscatter is a prominent technical evolution in next-generation wireless systems, supporting both high-precision sensing and massive communication. This paper introduces UniScatter, a new backscatter tag structure based on metamaterials, which achieves consistent electromagnetic responses across a wide frequency range and wide angular field-of-view. Field tests demonstrate that UniScatter can backscatter signals across a wide frequency band from 24 GHz to 77 GHz with consistently high signal strength and wide angular coverage in 3D space.
PROCEEDINGS OF THE 29TH ANNUAL INTERNATIONAL CONFERENCE ON MOBILE COMPUTING AND NETWORKING, MOBICOM 2023
(2023)
Article
Chemistry, Multidisciplinary
Mingwan Leng, Nandu Koripally, Junjie Huang, Aikaterini Vriza, Kyeong Yeon Lee, Xiaozhou Ji, Chenxuan Li, Megan Hays, Qing Tu, Kim Dunbar, Jie Xu, Tse Nga Ng, Lei Fang
Summary: This article introduces a new class of conductive polymers with a fully ladder-type backbone. A low-defect ladder polymer is synthesized through a molecular design strategy, which can be efficiently oxidized and acid-doped to achieve conductivity. The polymer's structure and open-shell nature are elucidated with the help of studies on small molecular models. An autonomous robotic system is used to optimize the conductivity of the polymer thin film, achieving over 7 mS cm(-1). The polymer demonstrates unparalleled stability in strong acid and under harsh UV-irradiation, surpassing commercial benchmarks like PEDOT:PSS and polyaniline.
MATERIALS HORIZONS
(2023)
Article
Engineering, Electrical & Electronic
Ning Li, Xin Hu, Xiubao Sui, Qian Chen, Tse Nga Ng
Summary: This decade has witnessed significant progress in the field of infrared light sensing and imaging, characterized by the utilization of innovative materials and deliberate structural designs. Organic semiconducting materials show great promise in next-generation infrared sensing applications due to their unique properties such as solution processability, tunable optoelectronic property, and biocompatibility. This Spotlight article aims to provide an overview of recent advances in organic infrared light detection technology beyond 1000 nm, focusing on enhancing performance and realizing new functions. Several innovative proof-of-concept demonstrations showcase the advantages of this rapidly advancing technology. Finally, we discuss the challenges and prospects of organic infrared technology.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Ning Li, Xin Hu, Xiubao Sui, Qian Chen, Tse Nga Ng
Summary: This article summarizes the rapid development of organic infrared light detection technology in the past decade, including innovative materials and deliberate structural designs. Organic semiconducting materials are promising for the next-generation infrared sensing applications due to their unique properties. The article focuses on performance enhancements and new function realizations for wavelengths beyond 1000 nm, presenting innovative proof-of-concept demonstrations to illustrate the benefits of organic infrared technology. Finally, the challenges and perspectives of organic infrared technology are discussed.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Bogyeom Seo, Jusung Chung, Naresh Eedugurala, Jason D. Azoulay, Hyun Jae Kim, Tse Nga Ng
Summary: This study demonstrates the integration of an organic bulk heterojunction polymer layer on an oxide thin-film transistor to achieve high-efficiency photodetection in the short-wave infrared region. By using trap-assisted charge injection, the organic semiconductor's photoresponse at longer wavelengths is enhanced. The detector performance is optimized by investigating the balance between bias stress and signal-to-noise under different bias conditions, resulting in a responsivity at 1550 nm up to 130 mA/W at a low light intensity.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Multidisciplinary Sciences
Thanh Huy Phung, Sang Hyeon Park, Inyoung Kim, Taik-Min Lee, Kye-Si Kwon
Summary: This article explores the monitoring method of inkjet print heads based on self-sensing signals and machine learning algorithms. By using supervised learning models to classify the jetting conditions of nozzles and proposing a hybrid monitoring method, the status of nozzles in the doubtful region can be verified. Experimental results show that the proposed method achieves high classification accuracy in monitoring.
SCIENTIFIC REPORTS
(2023)
Article
Automation & Control Systems
Yichen Zhai, Tse Nga Ng
Summary: This study applies a biomimetic strategy of combining soft actuators with an exoskeleton to create self-sustained robots for transportation in unsupervised environments. The robot uses liquid crystal elastomers for soft actuation components and polycarbonate for the exoskeleton. It achieves self-sustained locomotion, high load capacity, and climbing ability without the need for external controls or complex electronics.
ADVANCED INTELLIGENT SYSTEMS
(2023)
