Article
Nanoscience & Nanotechnology
Stephen J. Bauman, Ahmad A. Darweesh, Miles Furr, Meredith Magee, Christos Argyropoulos, Joseph B. Herzog
Summary: This work demonstrates the successful use of gold nanosphere metasurfaces with tunable subnanometer gap widths for surface-enhanced Raman spectroscopy (SERS). The results show that the signal enhancement increases with decreasing gap width, but an enhancement quenching effect is observed below gaps of around 1 nm. This study highlights the potential of tunable sub-nanometer gap metasurfaces as a tool to investigate subnanometer scale effects at the interface between plasmonic nanostructures.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Jaroslaw Mazuryk, Katarzyna Klepacka, Joanna Piechowska, Jakub Kalecki, Ladislav Derzsi, Piotr Piotrowski, Piotr Paszke, Dorota A. Pawlak, Simone Berneschi, Wlodzimierz Kutner, Piyush Sindhu Sharma
Summary: The present research reports on the in-water, site-specific photodeposition of glyphosate-containing polyacrylamide nanofilms. The successful photodeposition was confirmed through material characterization and analysis. Additionally, the study found that glyphosate had an impact on polymer gelation. These findings are important for the development of glyphosate-based nanomaterials and chemical sensors.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Physical
Adolfo del Campo, Sandra Ruiz-Gomez, Eva M. Trapero, Cecilia Granados-Miralles, Adrian Quesada, Michael Foerster, Lucia Aballe, Jose Emilio Prieto, Juan de la Figuera
Summary: The study reveals distinct evolutions of the Verwey transition on magnetite islands of different thicknesses, with islands thicker than 20nm showing differences in charge order compared to their thinner counterparts.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Tharaka M. D. S. Weeraddana, Shashini M. Premathilaka, Yiteng Tang, Antara Debnath Antu, Adam Roach, Jun Yang, Liangfeng Sun
Summary: Two-dimensional colloidal PbS nanosheets have a significantly higher exciton binding energy than their bulk counterpart, allowing for the generation of stable excitons at room temperature. The binding energy of the exciton increases as the thickness of the PbS nanosheet decreases, due to dielectric confinement. This large binding energy leads to a faster exciton radiative recombination rate, which has been confirmed experimentally.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Xie He, Qijie Cao, Jing Pan, Liu Yang, Sailing He
Summary: Transparent conductive electrodes (TCEs) are experimentally demonstrated using patterned few nanometer-thick silver films on zinc oxide-coated rigid and flexible substrates. The ultrathin TCE, with high transparency and low sheet resistance, breaks the optical limits of unpatterned film counterparts and achieves superior figure of merit compared to thick metal grid TCEs.
Article
Nanoscience & Nanotechnology
Ki-Bong Nam, Jin-Ho Yeo, Qicheng Hu, Mun Ja Kim, Byungdu Oh, Ji-Beom Yoo
Summary: This study developed a transfer method using camphor as the supporting layer for NGFs, successfully addressing issues of defects and residues that may occur when using PMMA. Through the sublimation of camphor, the integrity of NGFs was ensured with no residue or defects observed.
Article
Materials Science, Coatings & Films
Tomas F. Babuska, Michael T. Dugger, Karl A. Walczak, Ping Lu, Adam Schwartzberg, Shaul Aloni, Tevye R. Kuykendall, John F. Curry
Summary: Molybdenum disulfide (MoS2) is a versatile material that can be used in various forms, such as particles, films, and coatings, for applications ranging from semiconductors to aerospace lubricants. Physical vapor deposition (PVD) and atomic layer deposition (ALD) have been commonly used to produce MoS2 coatings, but with different limitations. This work demonstrates the use of ultra-thin low temperature ALD MoS2 coatings as promising solid lubricants for aerospace applications requiring low-temperature processing and complex geometries.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Wei Liu, Donghong Wang, Kexun Li, Xuehong Wei
Summary: The study introduced a sacrificial template strategy to prepare hollow spheres of Ti3C2Tx, which exhibited improved MA performance due to a unique macroporous structure. The Ti3C2Tx hollow spheres showed significantly better performance in terms of reflection loss compared to Ti3C2Tx nanosheets at lower filler loading, and their MA capabilities could be adjusted within a range by changing cavity size and thickness.
ACS APPLIED NANO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Zidong Liang, Qing Wang, Jikui Ma, Jihong Liu, Shufang Wang, Shuang Qiao
Summary: In this study, Bi2Se3 films of different thicknesses were prepared and used as self-powered light position-sensitive detectors. The Bi2Se3/planar-Si heterojunction showed a broad-band response range and the response depended on the thickness of the Bi2Se3 layer. A novel Bi2Se3/pyramid-Si heterojunction was also constructed, which greatly enhanced the position sensitivity while maintaining good conduction properties and fast response speed.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Prithu Roy, Clemence Badie, Jean-Benoit Claude, Aleksandr Barulin, Antonin Moreau, Julien Lumeau, Marco Abbarchi, Lionel Santinacci, Jerome Wenger
Summary: This study evaluates the protective performance of various metal oxides on aluminum nanostructures, finding that a combination of Al2O3 and TiO2 provides the best resistance performance.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Hao-Wen Cheng, Chien-Yao Juan, Anisha Mohapatra, Chung-Hao Chen, Yu-Che Lin, Bin Chang, Pei Cheng, Hao-Cheng Wang, Chih Wei Chu, Yang Yang, Kung-Hwa Wei
Summary: This study demonstrates a universal approach for constructing a new bilayer device architecture in OPV systems, utilizing a few-nanometer-thick third-component layer on a bulk-heterojunction binary blend layer. The enhancement in power conversion efficiency achieved through the layered third-component structure shows great promise for achieving high-performance OPVs.
Article
Engineering, Electrical & Electronic
Bohan Xu, Patrick D. Lomenzo, Alfred Kersch, Thomas Mikolajick, Uwe Schroeder
Summary: Si-doped ZrO2 thin films exhibit ferroelectric behavior and the ferroelectric properties can be modulated by Si dopants. The monoclinic and orthorhombic phases decrease, while the tetragonal phase increases with increasing Si-doping content in ZrO2 films. The ZrO2 films show antiferroelectric characteristics at room temperature and lower temperatures.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Tatsuki Sasaki, Lina Sun, Yu Kurosawa, Tatsuhiro Takahashi, Yoshiyuki Suzuri
Summary: This study investigated the VUV-induced PHPS densification process by examining the effects of Si-N bond number, PHPS film composition, and free volume. It was found that VUV irradiation caused rapid hydrogen release and film densification through the formation of Si-N bonds. The densification of nanometer-thick PHPS films was a relatively slow process characterized by a reduction in free volume in the Si-N network.
ACS APPLIED NANO MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Yilei Zhang, Zhengang Lu, Jiubin Tan
Summary: Designing an ultra-thin microwave absorber with tunable absorption and broadband optical transparency is a challenging task. This work presents a visible-infrared transparent ultra-thin frequency-tunable microwave absorber based on a nanometer-thick patterned vanadium dioxide (VO2) film. The absorber achieves a thermally peak absorption frequency modulation range of 15.42-12.99GHz, while having an ultra-thin thickness of only 0.071 of the central wavelength in this range. Additionally, the absorber exhibits high optical transparency from 380 to 6000 nm, making it suitable for various optical and intelligent platform applications.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Dongyang Han, Kewei Liu, Jialin Yang, Xing Chen, Binghui Li, Lei Liu, Dezhen Shen
Summary: Interface engineering, specifically the insertion of an SiO2 interfacial layer, significantly improved the performance of p-Si/n-ZnGa2O4 heterojunction solar-blind ultraviolet photodetectors. The SiO2 layer reduced dark current, improved photo-to-dark current ratio and detectivity, and decreased rise and decay times of the device. Additionally, the large conduction band offset of Si/SiO2 effectively blocked visible-light-generated electrons, enhancing the UV-visible rejection ratio of the photodetector.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Physics, Applied
Vladimir Poborchii, Alexander Shklyaev, Leonid Bolotov, Noriyuki Uchida
JOURNAL OF APPLIED PHYSICS
(2019)
Article
Nanoscience & Nanotechnology
Vladimir Poborchii, Mohammed Bouabdellaoui, Noriyuki Uchida, Antoine Ronda, Isabelle Berbezier, Thomas David, Carmen M. Ruiz, Mimoun Zazoui, Robert Paria Sena, Marco Abbarchi, Luc Favre
Article
Physics, Applied
Kimihiko Kato, Takahiro Mori, Yukinori Morita, Takashi Matsukawa, Mitsuru Takenaka, Shinichi Takagi
APPLIED PHYSICS EXPRESS
(2020)
Article
Nanoscience & Nanotechnology
Leonid Bolotov, Noriyuki Uchida, Shinji Migita
Summary: The lateral uniformity of electric and elastic properties of polycrystalline thin Hf0.55Zr0.45O2 films sputtered on Si was compared in this study, showing a correspondence between the lateral dimension of grains and the variations in elastic stiffness and surface electric potential.
Article
Physics, Applied
Mohit, Shinji Migita, Hiroyuki Ota, Yukinori Morita, Eisuke Tokumitsu
Summary: This study investigated the stability of ferroelectricity in HZO films deposited by different methods in MFS structures. Sputtered HZO films lost their ferroelectricity after re-annealing, while CSD Y-HZO films maintained their ferroelectric nature with minimal monoclinic phase.
APPLIED PHYSICS EXPRESS
(2021)
Article
Physics, Applied
Shinji Migita, Hiroyuki Ota, Shutaro Asanuma, Yukinori Morita, Akira Toriumi
Summary: Comparison was made between the ferroelectric phase transformation of Hf0.5Zr0.5O2 solid solution films and HfO2/ZrO2 nanolaminate films. The results showed that nanolaminate structures remained robust even after high-temperature annealing, and exhibited better ferroelectric performance.
APPLIED PHYSICS EXPRESS
(2021)
Article
Physics, Applied
Kenshi Takada, Mikio Murase, Shinji Migita, Yukinori Morita, Hiroyuki Ota, Norifumi Fujimura, Takeshi Yoshimura
Summary: In this study, direct piezoelectric measurement was employed to investigate the polarization characteristics of ferroelectric HfO2-based thin films, revealing the transition of a non-ferroelectric layer to a ferroelectric phase through electric field cycling.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Applied
Yuki Hara, Mohit, Tatsuya Murakami, Shinji Migita, Hiroyuki Ota, Yukinori Morita, Eisuke Tokumitsu
Summary: The study showed that HZO films annealed at reduced pressures exhibit excellent ferroelectric properties and thermal stability, possibly due to the introduction of oxygen vacancies stabilizing the ferroelectric phase. Conversely, HZO films annealed at high pressures showed degraded electrical properties. Additionally, ferroelectric gate transistor operation was demonstrated using an HZO gate insulator annealed at 100 Pa with an indium-tin-oxide channel.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Kimihiko Kato, Yongxun Liu, Shigenori Murakami, Yukinori Morita, Takahiro Mori
Summary: Process technologies have been developed for electron-beam lithography aimed at silicon quantum devices. The study investigated lithography of Si quantum devices using a point-beam EB system and specialized resist, optimizing temperatures and dose assignment to achieve fine patterns. It is expected to provide useful process technologies for EB lithography.
Article
Physics, Applied
Yukinori Morita, Hiroyuki Ota, Shinji Migita
Summary: This study investigates the carrier transport properties of ferroelectric Hf0.5Zr0.5O2 thin films. In the first current flow of ferroelectric poling treatment, a kink or discontinuity point appears in the current-voltage characteristics, which disappears after cyclic voltage sweeps. This phenomenon is different from the reported ferroelectric instabilities of wake-up and fatigue. Analysis using a Poole-Frenkel plot suggests the occurrence of irreversible trap generation induced by electric field application in the poling treatment.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Applied
Mohit, Yuli Wen, Yuki Hara, Shinji Migita, Hiroyuki Ota, Yukinori Morita, Keisuke Ohdaira, Eisuke Tokumitsu
Summary: This study investigates the effects of catalytically generated atomic hydrogen (Cat-H) treatment on the electrical properties of 10 nm thick sputtered hafnium-zirconium-oxide (HZO) films. The results show that the Cat-H treatment effectively stabilizes the crystallized state of the deposited HZO film and significantly enhances its ferroelectricity, especially in nitrogen and air ambient. Additionally, the Cat-H treatment improves the stability against re-annealing.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Applied
T. Yajima, T. Nishimura, S. Migita, T. Tanaka, K. Uchida, A. Toriumi
APPLIED PHYSICS LETTERS
(2020)
Article
Mathematics, Interdisciplinary Applications
Junichi Hattori, Tsutomu Ikegami, Koichi Fukuda, Hiroyuki Ota, Shinji Migita, Hidehiro Asai
IEICE NONLINEAR THEORY AND ITS APPLICATIONS
(2020)
