Article
Thermodynamics
Patrick Sullivan, Duncan Dockar, Ryan Enright, Matthew K. Borg, Rohit Pillai
Summary: This study investigates the growth process of heterogeneous vapor bubbles under different surface conditions and finds that surface wettability plays an important role in the shape and dynamics of the bubbles. These findings have the potential to improve the performance of systems involving phase change from liquid to vapor.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Chemistry, Physical
A. M. Engwall, L. B. Bayu Aji, A. A. Baker, S. J. Shin, J. H. Bae, S. K. McCall, J. D. Moody, S. O. Kucheyev
Summary: The study investigated the effects of substrate tilt on properties of gold-tantalum alloy films deposited by magnetron sputtering. It was found that the deposition rate and film density decrease with increasing substrate tilt angle, leading to changes in film properties such as porosity and electrical resistivity. The critical tilt angle for increased resistivity was determined to be between 40 and 60 degrees.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Bhanu Priya, Priya Jasrotia, Indra Sulania, Raj Kumar, Jyoti, Ratnesh K. Pandey, Tanuj Kumar
Summary: The wettability of the surface of an active material affects its interaction with the electrolyte and electrode in electrochemical applications. This study evaluated the wettability of V2O5 by examining its surface properties. V2O5 thin films were grown on different substrates after N+ ion implantation, and the growth dynamics were analyzed in terms of surface morphology and fractal parameters. The results showed that the surface morphology and wettability of V2O5 are substrate-dependent and can be controlled using fractal parameters.
APPLIED SURFACE SCIENCE
(2023)
Article
Thermodynamics
Wei -Ting Hsu, Dong Il Shim, Maroosol Yun, Donghwi Lee, Beom Seok Kim, Hyung Hee Cho
Summary: The effect of substrates with silicon base and zinc oxide nanowires on pool boiling heat transfer characteristics is investigated. The mechanisms for enhancing critical heat flux and heat transfer coefficient of zinc oxide nanowire substrates are explored by analyzing surface morphology, bubble, and wicking characteristics. The applicability of using zinc oxide nanowires for boiling heat transfer in industrial fields is determined.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Physics, Applied
Yasuji Yamada, Yumika Yamada, Shuhei Funaki
Summary: Magnetron sputtering deposition with Zn supply was used to deposit Ga-doped ZnO (GZO) films, resulting in minimized crystalline defects and significantly increased carrier concentration. The impact of partial oxygen pressure on the deposition atmosphere on carrier concentration was reduced, leading to films with resistivity as low as 4 x 10-4 omega cm without intentional substrate heating. This deposition technique shows great potential for producing ZnO-based transparent conducting films with low resistivity on polymer substrates with lower heat tolerance.
APPLIED PHYSICS EXPRESS
(2023)
Article
Chemistry, Physical
Seungkwon Hwang, Yunjeong Hwang, Byeongjin Park, Ju Ah Lee, Dong-Hyeong Choi, Ah Ra Kim, Seoung-Ki Lee, Jung-Dae Kwon, Se-Hun Kwon, Yonghun Kim
Summary: This study successfully demonstrates a wrinkle-free transfer method that can easily control the wrinkles of MoS2 thin films on Si3N4 substrates, leading to improved device performance.
APPLIED SURFACE SCIENCE
(2022)
Article
Thermodynamics
Xiaolong He, Haonan Peng, Jianmin Zhang, Yang Liu
Summary: Investigated the hydrodynamics and thermodynamics of attached wall vapor cavitation bubble collapse under different wall wettability using an improved double distribution function thermal pseudo-potential model. Found that wettability significantly affects bubble morphology and captured the peaks on the temperature distribution curves caused by phase transition and high-pressure regions.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Materials Science, Multidisciplinary
Dongwen Gao, Li Wang, Xueqiong Su, Jin Wang, Ruixiang Chen
Summary: This study investigated the impact of a magnetic field on the optical properties of Co-doped ZnS nano films. By manipulating the growth structure of the film during deposition using a magnetic environment, the optical properties were enhanced. Experimental results under magnetic field conditions were consistent with simulation results, confirming the improved optical properties.
Article
Mechanics
Si-Cheng Wang, Zi-Xiang Tong, Ya-Ling He, Xiang Liu
Summary: Pseudopotential lattice Boltzmann model is effective for liquid-vapor phase change simulations. Accurate unit conversion is crucial for practical simulations, and this work proposes a novel method based on fundamental units. Numerical simulations confirm the accuracy of the proposed method.
Article
Chemistry, Multidisciplinary
Cecilie Fynbo, Mathias K. Huss-Hansen, Oier Bikondoa, Chandrasekhar Gangadharappa, Demetrio Antonio da Silva Filho, Satish Patil, Matti Knaapila, Jakob Kjelstrup-Hansen
Summary: This study investigates the influence of deposition method and substrate surface on the morphology and microstructure of n-dialkyl side-chain-substituted thiophene DPP end-capped with phenyl groups (Ph-TDPP-Ph) thin films. Different morphologies were observed between spin-coated and vacuum-deposited thin films, with fiber-like morphology and continuous layer of terraced grains, respectively. After initial film evolution, all deposition methods and substrate types resulted in well-ordered thin films with slight variations in crystallinity and mosaicity. Aging of spin-coated films showed noticeable evolution in morphology and crystalline phases, indicating the possibility of tailoring the thin-film properties of DPP derivatives through film formation process manipulation.
Article
Physics, Applied
Chandra Shekar Gantepogu, Peramaiyan Ganesan, Tanmoy Paul, Chun-Hao Huang, Po-Wei Chi, Maw-Kuen Wu
Summary: Transition metal oxide films exhibit strong structure-property correlations, and this study successfully prepared thickness-dependent epitaxial Ti2O3 thin films, revealing a correlation between crystal structure and superconductivity.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Lijian Meng, Tao Yang
Summary: Nanostructured TiO2 films were deposited on Indium Tin Oxide (ITO) and glass substrates using dc reactive magnetron sputtering at various substrate inclination angles. The structural and optical properties of the films were analyzed using X-ray diffraction, scanning electron microscopy, and UV-Vis spectrophotometer. Dye-sensitized solar cells (DSSC) were constructed with these TiO2 films as photoelectrodes, and the impact of substrate inclination angle during film preparation on DSSC conversion efficiency was investigated.
Article
Materials Science, Coatings & Films
Ashley N. Keobounnam, Chase Lenert-Mondou, Alexzandria Kubik, Morgan J. Hawker
Summary: Silk fibroin is a natural polymer with potential for biomedical use, but its hydrophobic nature can limit cell adhesion. Low-temperature plasma (LTP) treatment can improve the hydrophilicity of silk, but the hydrophobic recovery of LTP-modified silk has not been studied. This study systematically evaluated the hydrophobic recovery of N-2 and H2O(g) LTP-treated silk films and found that both treatments resulted in surfaces that remained hydrophilic over a 6-week aging period.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Nanoscience & Nanotechnology
Sihan Zhang, Kaiwen Xiao, Yu Zhang, Yucong Ji, Jiaxin Wang, Jun Chen
Summary: This study successfully synthesized perovskite nanowires with excellent polarization properties using the thermal injection method. By embedding the nanowires in polyvinyl alcohol (PVA) and using mechanical stretching, films with higher polarization performance were achieved. The optimized stretched composite film showed superior polarization degree and the arrangement of PVA molecules contributed to the improvement of polarization properties.
Article
Pharmacology & Pharmacy
Klaudia Szafran, Malgorzata Jurak, Robert Mroczka, Agnieszka Ewa Wiacek
Summary: The surface properties of PET coated with ternary monolayers (DOPC-CsA-LG) were studied using LB technique. AFM, TOF-SIMS, and contact angle measurements were employed for characterization. The results showed effective transfer and smoothing of LB films on PET surface. Wettability studies revealed the type and strength of interactions between the coatings and different liquids. The conformational changes of CsA molecules were influenced by the surrounding molecular environment and had important implications for drug delivery.
