Article
Chemistry, Physical
I Hotovy, L. Spiess, M. Mikolasek, I Kostic, M. Sojkova, H. Romanus, M. Hulman, D. Buc, V Rehacek
Summary: The study presents investigations on the structural, optical, and electrical properties of layered WS2 films synthesized on tungsten. The results show that the thickness of the W films and the sulfurization temperature affect the microstructure and electrical properties of the WS2 films.
APPLIED SURFACE SCIENCE
(2021)
Article
Polymer Science
Anna Dmochowska, Jorge Peixinho, Cyrille Sollogoub, Guillaume Miquelard-Garnier
Summary: We conducted a systematic study on the extensional rheology of multilayer films of immiscible polymer blends using multi-nanolayer coextrusion. By increasing the number of interfaces, we were able to quantify the interfacial response of the films. Our findings revealed that a model based on the summation of individual polymer contributions and the interfacial contribution accurately predicted the transient extensional viscosity at low strain rates, but underestimated the extra stress at higher strain rates. This extra contribution was attributed to an interphase modulus and followed a power law increase with strain rate.
Article
Nanoscience & Nanotechnology
Zhao-Bo Sun, Lei Li, Guo-Qi Ma, Yuan Chen, De-Zhuang Jia, Xu-Juan Li, Yue Li, Jun Lei, Gan-Ji Zhong, Zhong-Ming Li
Summary: In this work, an interconnected multi-nanolayer (IMN) structure was designed in PBAT/PBS cocontinuous blends using an extensional flow field during a casting-thermal stretching process. The hierarchical structures in the IMN films, including phase morphology, crystal structure, and lamellar crystals, have been revealed, demonstrating the crucial role of extensional flow. The IMN structure shows improved tear strength, tensile strength, and puncture resistance due to the oriented PBAT phase, enhanced interfacial adhesion, increased crystallinity, and thickened lamellar structure.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Polymer Science
Geraldine Cabrera, Ibtissam Touil, Emna Masghouni, Abderrahim Maazouz, Khalid Lamnawar
Summary: This paper presents a future-oriented approach for the valorization of polyethylene-based multilayer films through eco-design and mechanical recycling. The study focuses on limiting the number of constituents, reducing/controlling layer thickness, and avoiding the use of tie layers to improve recyclability. By developing new structures and investigating various recycling processes, the research aims to simplify the manufacturing of new products from recycled multilayer materials.
Article
Materials Science, Multidisciplinary
Jiangang Wang, Wenjing Shen, Xin Zhang, Jianhui Li, Jing Ma
Summary: In this study, Al-doped and (Al, Fe) codoped ZnO films were prepared using the sol-gel method on glass substrates. Characterization of surface morphology, structure, and optical properties showed that codoped films had smaller grain size and were smoother, with reduced crystalline degree. XPS analysis revealed Al and Fe ions existing in trivalent forms in the films, while the doped films exhibited higher transmission and shifted absorption edge towards short-wavelength direction.
Article
Materials Science, Multidisciplinary
Lijun Song, Shiru Qu, Lijing Ma, Shihui Yu
Summary: A novel transparent composite conductor composed of WOx/Ag nanowire on a flexible PET substrate with enhanced adhesion and stability is prepared using an all-solution process. The WOx/Ag NW films exhibit lower sheet resistance (9.4 Ω/sq) and higher optical transmittance (82.6%) compared to commercial ITO films on PET substrates. Additionally, the WOx/AgNW thin films demonstrate good flexibility and adhesion to PET, as well as stability in high temperature, humidity, and strong oxidation environments.
Article
Materials Science, Ceramics
Selma M. H. AL-Jawad, Natheer Jamal Imran, Kahlaa H. Aboud
Summary: The Mn-CdS nanoflowers were successfully deposited using hydrothermal technique at 150 degrees C for 2 hours. The effect of changing the dopant concentration on the structural, morphological and optical properties of the produced samples was investigated, revealing a decrease in energy band-gap values and crystalline size with increasing manganese concentrations.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
M. Krbal, V. Prokop, V. Cervinka, S. Slang, B. Frumarova, J. Mistrik, P. Provotorov, M. Vlcek, A. V. Kolobov
Summary: This study successfully prepared transparent, smooth, and defect-free amorphous thin films by spin-coating method, and found that both the refractive index and extinction coefficient decrease with increasing MoS3 content, while the contribution of absorption tails gradually becomes more intense and red-shifted.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Materials Science, Multidisciplinary
Yuanying Yue, Xuehui Yan, Yong Zhang
Summary: This study investigates the composition, microstructure, and mechanical properties of Cantor alloy films deposited at different sputtering powers using DC magnetron sputtering. The results show that the films exhibit a nano-fiber-structured growth pattern and higher hardness with increasing sputtering power, indicating their potential as high-hardness wear-resistant coatings.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Mei Wang, Huating Bo, Aobo Wang, Zhengwang Cheng, Shengjia Li, Wei Zou, Jing He, Xinguo Ma
Summary: To adapt to the upgrading of wireless communication system, research on thin film bulk acoustic resonator (FBAR) has gained attention. This study focuses on the core functional layer, the piezoelectric film, particularly aluminum nitride (AlN) and scandium-doped AlN films, examining their characteristics and quality changes. The results show that doping with scandium significantly improves the uniformity, roughness, and stress of AlN films, making it promising for improving the performance of FBAR filters and device yield.
Article
Materials Science, Multidisciplinary
Min Zha, Teng Tian, Hai-Long Jia, Hong-Min Zhang, Hui-Yuan Wang
Summary: This study focuses on the microstructure and thermal stability of Al-Mg alloys. By adjusting the Sc/Zr ratio, the Al3(Sc,Zr) precipitates and microstructure of Al-7Mg alloys can be tailored to enhance strength and maintain ductility. The high Sc/Zr ratio promotes a multi-scale heterogeneous microstructure, leading to improved strength-ductility synergy. The addition of Zr also enhances thermal stability and coarsening resistance of the Al3(Sc,Zr) precipitates.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Lianping Chen, Yuanhong Gao, Yibin Chen, Jun Cao
Summary: The influence of europium on the structure and luminescent properties of CaWO4 thin films was investigated, and the sputtering yields of different compounds were studied. The results showed that the compositions of the deposits matched those of the targets, and the lattice constants increased under certain conditions. The preferential growth along a specific crystal plane also increased due to the substitution of Ca2+ with Eu2+. Doping of Eu led to improved photoluminescence performance of the films.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Ming-Jie Zhao, Jin-Fa Zhang, Qi-Hui Huang, Wan-Yu Wu, Ming-Chun Tseng, Shui-Yang Lien, Wen-Zhang Zhu
Summary: The study found that an increase in working pressure leads to higher resistivity, transparency, and optical band gap in indium tin oxide (ITO) films. The Sn/In atomic ratio and oxygen vacancy concentration in the film decrease with increasing working pressure.
Article
Materials Science, Ceramics
Beata Pecusova, Anna Prnova, Jana Valuchova, Milan Parchoviansky, Robert Klement, Dusan Galusek
Summary: The ytterbium-aluminate microspheres with ytterbium-aluminium garnet composition doped by different amounts of Er2O3 were prepared. The prepared systems were mostly X-ray amorphous with the presence of traces of ytterbium-aluminium garnet phase and ytterbium oxide. The thermal analysis showed crystallization of the prepared systems in the temperature range of 914-984 degrees C.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Yuanxia Lao, Xiumin Lao, Yuqi Yin, Yucui Zhai, Yi Yang, Sen Sun
Summary: Multi-principal component alloys, deposited using radio frequency magnetron sputtering, show that composition affects crystal structure, with Al and Cr stabilizing bcc structure and Ni and Fe stabilizing fcc structure. Factor analysis reveals the order of stabilizing effect of each principal element on the bcc structure. Magnetic properties are closely related to the crystal structure of the alloys.
Article
Physics, Applied
Masato Takiguchi, Guoqiang Zhang, Satoshi Sasaki, Kengo Nozaki, Edward Chen, Kouta Tateno, Takehiko Tawara, Akihiko Shinya, Hideki Gotoh, Masaya Notomi
APPLIED PHYSICS LETTERS
(2018)
Editorial Material
Physics, Applied
Hiroyuki Kageshima, Takuji Hosoi, Satoshi Iwamoto, Takayuki Arie, Masahisa Fujino, Yuzo Fukuzaki, Syunta Harada, Masashi Ikegami, Noriyuki Iwamuro, Koh Johguchi, Kuniyuki Kakushima, Haruichi Kanaya, Akihiko Kikuchi, Kentaro Kinoshita, Rihito Kuroda, Yasuyoshi Kurokawa, Kenzo Maehashi, Keiichi Maekawa, Toshiharu Makino, Toshinori Matsushima, Toshitaka Miyata, Hiroshi Morioka, Hiroshi Morioka, Mariappan Murugesan, Kosuke Nagashio, Takahiro Nagata, Osamu Nakatsuka, Nobuhiko Nishiyama, Akira Oiwa, Hiroyuki Okada, Teruo Ono, Toshitsugu Sakamoto, Toshiya Sakata, Mizuki Shirao, Kazuo Sukegawa, Toshikazu Suzuki, Hidetoshi Suzuki, Tetsuya Taima, Tetsu Tanaka, Kohichi Tatsuoka, Takehiko Tawara, Kunio Tsuda, Kazuhiko Yamamoto
JAPANESE JOURNAL OF APPLIED PHYSICS
(2018)
Article
Physics, Multidisciplinary
Ryuichi Ohta, Hajime Okamoto, Takehiko Tawara, Hideki Gotoh, Hiroshi Yamaguchi
PHYSICAL REVIEW LETTERS
(2018)
Article
Chemistry, Multidisciplinary
Satoru Adachi, Yoshihiro Kawakami, Reina Kaji, Takehiko Tawara, Hiroo Omi
APPLIED SCIENCES-BASEL
(2018)
Article
Materials Science, Multidisciplinary
Tomohiro Inaba, Takehiko Tawara, Hiroo Omi, Hideki Yamamoto, Hideki Gotoh
OPTICAL MATERIALS EXPRESS
(2018)
Article
Multidisciplinary Sciences
Guoqiang Zhang, Masato Takiguchi, Kouta Tateno, Takehiko Tawara, Masaya Notomi, Hideki Gotoh
Article
Optics
Masaya Hiraishi, Mark IJspeert, Takehiko Tawara, Satoru Adachi, Reina Kaji, Hiroo Omi, Hideki Gotoh
Article
Optics
Xuejun Xu, Viviana Fili, Wojciech Szuba, Masaya Hiraishi, Tomohiro Inaba, Takehiko Tawara, Hiroo Omi, Hideki Gotoh
Article
Physics, Applied
Guoqiang Zhang, Dominika Gnatek, Masato Takiguchi, Xuejun Xu, Kouta Tateno, Satoshi Sasaki, Takehiko Tawara, Hideki Gotoh
JAPANESE JOURNAL OF APPLIED PHYSICS
(2020)
Article
Physics, Multidisciplinary
Ryuichi Ohta, Loic Herpin, Victor M. Bastidas, Takehiko Tawara, Hiroshi Yamaguchi, Hajime Okamoto
Summary: The study demonstrates a strain-mediated interaction between phonons and telecom photons using erbium ions in a mechanical resonator. Due to the long-lived nature of rare-earth ions, the dissipation rate of the optical resonance falls below that of the mechanical one, achieving a reversed dissipation regime in the optical frequency region. The interaction leads to stimulated excitation of erbium ions and the potential for single-photon strong coupling exceeding the dissipation rates of erbium and mechanical systems.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
S. Yasui, M. Hiraishi, A. Ishizawa, H. Omi, R. Kaji, S. Adachi, T. Tawara
Summary: Precise spectroscopy of the hyperfine level system of Er-167-doped Y2SiO5 was achieved in the frequency domain using an optical frequency comb to stabilize the light source frequency. The method allowed for obtaining a more accurate hole spectrum with a narrow homogeneous linewidth, opening the way for exploring relaxation mechanisms in the frequency domain through simple steady-state measurements.
Article
Optics
Xuejun Xu, Tomohiro Inaba, Tai Tsuchizawa, Atsushi Ishizawa, Haruki Sanada, Takehiko Tawara, Hiroo Omi, Katsuya Oguri, Hideki Gotoh
Summary: Integrated optical amplifiers are crucial for large-scale and complex silicon photonic integrated circuits. A low-loss waveguide platform has been developed based on rare-earth oxide thin films grown on silicon substrates. Optical signal enhancement has been observed in waveguides with high peak enhancement in a wide wavelength range, showcasing progress towards high-performance monolithic-integrated optical amplifiers on silicon.
Article
Optics
S. Yasui, M. Hiraishi, A. Ishizawa, H. Omi, T. Inaba, X. Xu, R. Kaji, S. Adachi, T. Tawara
Summary: By using the 167Er3+:Y2SiO5 hyperfine level system, researchers created high-resolution atomic frequency combs (AFCs) and optimized the pulse sequence for efficient AFC quantum memory. The results show that AFCs with a resolution of 800 kHz can be created using appropriate pump light intensity, achieving an efficiency of 0.16% and a memory time of 0.5 μs even under zero magnetic field and 10 ppm Er concentration.
Article
Materials Science, Multidisciplinary
Ryuichi Ohta, Hajime Okamoto, Takehiko Tawara, Hideki Gotoh, Hiroshi Yamaguchi
Article
Materials Science, Multidisciplinary
Keiko Kato, Yuya Hasegawa, Katsuya Oguri, Takehiko Tawara, Tadashi Nishikawa, Hideki Gotoh
