Article
Polymer Science
Jun-Yeong Yang, Sunghoon Jung, Eun-Yeon Byeon, Hyun Hwi Lee, Do-Geun Kim, Hyo Jung Kim, Ho Won Jang, Seunghun Lee
Summary: This work reports the self-organization of dimple nanostructures on a polyethylene naphthalate (PEN) surface induced by an Ar ion beam. The study found that Ar ion beam irradiation did not induce crystallization of the PEN surface, but rather led to self-organization due to the ion-induced surface instability of the amorphous layer.
Article
Optics
Freddie Santiago, Carlos O. Font, Sergio R. Restaino, Syed N. Qadri, Brett E. Bagwell
Summary: The research aims to develop an optical anemometer and turbulence characterization system for unmanned aerial vehicle (UAV) applications, providing information on atmospheric turbulence, wind information, and scintillation for quick adaptation to changes in atmospheric conditions. The study explores a bi-static dynamic link system using a small UAV and adaptive/active elements to control beam divergence, optimizing the signal for improved performance.
Article
Chemistry, Physical
F. Hoelzel, D. Rolon, J. Bauer, J. Kober, S. Kuehne, F. Pietag, D. Oberschmidt, T. Arnold
Summary: Investigated the reactive ion beam finishing process of rapidly solidified aluminum (RSA) 501 using CF4 and N2 gasses to improve the surface roughness for UV optics. Found that surface modification can prevent grain orientation-dependent etching and adjusting ion incidence angle can reduce the protrusion of precipitates after UP-machining. Achieved a surface roughness value of Sq = 0.9 nm +/- 0.1 nm in the micro-roughness range using collimated ion beams with CF4 process gas at 40 degrees and 80 degrees angle of incidence.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Thomas Gischkat, Max Dobeli, Andreas Bachli, Roelene Botha, Zoltan Balogh-Michels
Summary: The wetting properties of ion-beam-sputtered Yttria thin films were investigated in this work, with water contact angles ranging from 67 to 96 degrees. The concentration of embedded argon atoms was found to influence the contact angle.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Bong Ho Kim, Hongji Yoon, Soon Hyeong Kwon, Dong Wook Kim, Young Joon Yoon
Summary: Researchers have successfully fabricated flexible photodetectors based on tungsten disulfide, which showed significantly improved photoresponsivity at different laser illumination wavelengths after electron beam irradiation treatment, along with reduced rise and fall times by 1-2 orders of magnitude. Mechanical durability of the photodetector was confirmed through static and cyclic bending tests, demonstrating only a small loss in performance (>10%) after continuous bending.
Article
Materials Science, Multidisciplinary
Divya Gupta, G. R. Umapathy, Rahul Singhal, Sunil Ojha, Sanjeev Aggarwal
Summary: Controlled surface structuring of amorphous silicon carbide thin films on silicon substrates by RF sputtering and obliquely incident Ar+ ion beam irradiation was investigated. Sub-wavelength ripple patterns were found to evolve on argon sputtered surfaces, and their parameters varied nonlinearly with the ion fluence. The preferential sputtering of silicon over carbon is responsible for the formation of these surface structures, and ion irradiation can be utilized to fabricate controlled surface nanostructures by optimizing the irradiation parameters.
Article
Chemistry, Physical
Guo-Quan Jiang, Cheng-Bao Yao, Ze-Miao Wang, Xue Wang, Yu Cai
Summary: A series of WS2, ZnO base films and ZnO&WS2 heterojunction composite films were successfully synthesized by RF magnetron sputtering, with structure, morphology and growth mechanism depending on different experimental parameters. The use of WS2 base films promoted the growth of ZnO sheet-like morphology, and XRD results showed similarities in characteristic peaks between ZnO&WS2 heterojunction composite films and individual ZnO and WS2.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Hailong Liang, Bo Zhang, Yuanyuan Guo, Xintao Guo, Shiqiang Ren, Yan Li, Yanqing Lu, Runlong Lang
Summary: In this work, Y-doped HfO2 thin films with ferroelectric properties were successfully prepared by ion beam assisted RF magnetron sputtering, achieving a high coercive field and remanent polarization. The structural and electrical properties of the films were found to be strongly dependent on the energy of the applied ion beam, with a model of phase transition kinetics introduced to explain the variations. The bombardment of the Ar ion beam provided extra energy to facilitate atomic diffusion and overcome potential barriers, showing great potential for ferroelectric device applications.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Petr Hauschwitz, Radka Bicstova, Alexander Brodsky, Natan Kaplan, Martin Cimrman, Jaroslav Huynh, Jan Brajer, Danijela Rostohar, Jaromir Kopecek, Martin Smrz, Tomas Mocek
Summary: This study introduces a high-energy pulsed ultrashort laser system and a novel diffractive laser-induced texturing element capable of producing a large number of sub-beams for nanostructuring in a square area, achieving superhydrophobic properties.
Article
Polymer Science
Mingzheng Hao, Lei Li, Xiaoming Shao, Ming Tian, Hua Zou, Liqun Zhang, Wencai Wang
Summary: A novel method for fabricating highly conductive Al/Ag core-shell structured microspheres was proposed, resulting in high conductivity and excellent electromagnetic shielding effectiveness.
Article
Chemistry, Multidisciplinary
Gohar Ijaz Dar, Elisabet Xifre-Perez, Lluis F. Marsal
Summary: A robust and competitive technology for synthesizing arranged high-density gold nanoparticles on highly uniform Al nanoconcavities substrates is introduced. The formation of nanoparticles is achieved through sputtering and thermal annealing treatment on Al templates, which are obtained by removing nanoporous anodic alumina structure selectively with controlled anodization conditions and phosphoric acid as electrolyte. The resulting substrates exhibit high performance for surface enhanced Raman scattering (SERS) detection and can be used as self-sustaining nanosensors, with a low detection limit of 10-7 M for 4-mercaptopyridine and a calculated EF factor of 1.1 x 107.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Andrea Garcia-Junceda, Luca Puricelli, Andrea Valsesia, Francois Rossi, Pascal Colpo, Ana Ruiz-Moreno
Summary: A methodology to miniaturize mechanical tests of metal alloys based on membrane deformation was developed in this investigation. This method requires small amounts of material for testing, making it particularly suitable for irradiated structural nuclear materials. The micro-punch testing methodology combines the advantages of facilitating the interpretation of the mechanical response and the high-throughput microspecimen fabrication.
Article
Materials Science, Multidisciplinary
T. Lertvanithphol, P. Limnonthakul, C. Hom-on, P. Jaroenapibal, C. Chananonnawathorn, S. Limwichean, P. Eiamchai, V. Patthanasettakul, K. Tantiwanichapan, A. Sathukarn, N. Nuntawong, A. Klamchuen, H. Nakajima, P. Songsiriritthigul, M. Horprathum
Summary: This study demonstrated a non-lithography method for fabricating nanoflake aluminum oxide films with omnidirectional broadband antireflection properties. The morphology, chemical composition, and optical properties of the prepared samples were characterized, showing that the optimal optical performance was achieved with a single nanoflake film layer. The facile fabrication process showed potential benefits for large area inexpensive omnidirectional anti-reflection coating.
Article
Chemistry, Physical
Arnoux Rossouw, Andrzej Olejniczak, Katarzyna Olejniczak, Boris Gorberg, Iliya Vinogradov, Olga Kristavchuk, Alexander Nechaev, Leslie Petrik, Willem Perold, Sergey Dmitriev
Summary: The feasibility of large-scale surface modification of polyethylene terephthalate track-etched membranes (TM) using industrial roll-to-roll planar magnetron sputtering of Ti and TiO2 was investigated in this study. The results showed that the sputtered coatings did not significantly change water permeability or reduce pore diameter, indicating that magnetron sputtering is a viable method for the large-scale fabrication of hybrid membranes based on TM.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Analytical
Chunyang Du, Yifan Dai, Chaoliang Guan, Hao Hu
Summary: This study investigates the effects of ion beam sputtering on single crystal aluminum with different crystallographic orientations using molecular dynamics method, revealing the detailed process of ion beam sputtering and its impact on the morphology of aluminum.