Article
Materials Science, Ceramics
Wei Chen, Teng Jiao, Zhaoti Diao, Zhengda Li, Peiran Chen, Xinming Dang, Xin Dong, Yuantao Zhang, Baolin Zhang
Summary: ss-Ga2O3 nanowire films were synthesized on Si(111) substrate by selective area growth (SAG) using metal-organic chemical vapor deposition (MOCVD). The effects of MOCVD process parameters on SAG were discussed by calculating Ga supersaturation. Transmission electron microscopy confirmed the preferential orientation of (002) crystal plane in ss-Ga2O3 nanowires. P-Si/ss-Ga2O3 nanowire heterojunctions were fabricated and exhibited high film resistance.
CERAMICS INTERNATIONAL
(2023)
Article
Physics, Applied
Gurcan Aral, Md Mahbubul Islam
Summary: This study investigates the oxidation process and mechanisms of Cu nanowires (NWs) using molecular dynamics simulations. It is found that the formed oxide layer significantly affects the mechanical response and properties of Cu NWs, leading to decreased strength, elastic modulus, yield stress, yield strain, and flow stress. Additionally, the mechanical response and properties of Cu NWs depend on the pre-existing oxide shell layer and the size of NWs.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Seil Lee, Hyun-Seok Ko, Kyuseok Han, Se-Jong Kim
Summary: The study examined the crystallographic orientation, grain size, and distribution of grain boundary characteristics in Si steel sheets to identify preferential sites for abnormal grain growth of Goss-oriented grains. It was found that grains with exact Goss orientation in the subsurface region had larger size and more high angle grain boundaries, contributing to abnormal grain growth. Conversely, grains with deviated Goss orientation in the central region also exhibited larger size and more high angle grain boundaries. This suggests that the high Goss selectivity is linked to the position of nuclei and favorable conditions for abnormal grain growth in the subsurface region.
MATERIALS CHARACTERIZATION
(2021)
Article
Nanoscience & Nanotechnology
Hee Ju Kim, Geun Young Yeom
Summary: This study investigated the effects of bias pulsing parameters and additive gases on the nanoscale Si trench etch characteristics during Cl-2/Ar plasma etching. It was found that the bias pulsing parameters during the asynchronous pulsing can affect the etch characteristics, such as etch rate, selectivity, and ARDE. The addition of CF4 and C4F8 gases improved the etch profile, with C4F8 providing a more anisotropic Si etch profile without sidewall bowing but sacrificing etch selectivity and ARDE.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Daniel Ruhstorfer, Armin Lang, Sonja Matich, Markus Doeblinger, Hubert Riedl, Jonathan J. Finley, Gregor Koblmueller
Summary: In this study, we conducted a comprehensive investigation on the growth dynamics of highly periodic, composition tunable InAsSb nanowire arrays using catalyst-free selective area molecular beam epitaxy. Our results show a strong correlation between the aspect ratio of the nanowires and the Sb content as well as the mask opening size, indicating the importance of these factors in controlling the growth of InAsSb nanowire arrays.
Article
Multidisciplinary Sciences
Giichiro Uchida, Kodai Masumoto, Mikito Sakakibara, Yumiko Ikebe, Shinjiro Ono, Kazunori Koga, Takahiro Kozawa
Summary: Si/Sn nanowires with high capacity were fabricated using He plasma sputtering in a single-step procedure. The Si/Sn nanowires had different structures depending on the plasma conditions. The anodes prepared with Si/Sn nanowire films exhibited excellent cycle stability and high Li-storage capacity.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Parisa Marashizadeh, Mohammad Abshirini, Mrinal Saha, Liangliang Huang, Yingtao Liu
Summary: The study investigated the interfacial properties of ZnO nanowire/carbon fiber-reinforced epoxy composites using MD simulations. Results showed that the addition of ZnO nanowires increased the interfacial strength and adhesion energy of the hybrid system.
Article
Physics, Applied
John Hayden, Joseph Shepard, Jon-Paul Maria
Summary: Ferroelectric Al0.93B0.07N thin films were prepared on (100) Si substrates with the necessary c-axis out-of-plane orientation achieved through initial plasma treatment and subsequent layer growth. The resulting films exhibited strong polarization hysteresis, making them useful for integration with mainstream semiconductors.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Loganathan Ravi, Prerna Chauhan, Kuppulingam Boopathi
Summary: InGaN nanowires grown on silicon were found to have significantly higher photocurrent compared to GaN nanowires. The In30Ga70N nanowires demonstrated improved photoelectrochemical performance for hydrogen fuel generation under white light irradiation, showing potential for more efficient hydrogen production.
APPLIED PHYSICS LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Valeriy M. Kondratev, Ekaterina A. Vyacheslavova, Talgat Shugabaev, Demid A. Kirilenko, Alexey Kuznetsov, Svetlana A. Kadinskaya, Zamir V. Shomakhov, Artem I. Baranov, Svetlana S. Nalimova, Vyacheslav A. Moshnikov, Alexander S. Gudovskikh, Alexey D. Bolshakov
Summary: This work focuses on the development of a highly sensitive silicon-based sensor for the detection and analysis of liquid solutions containing ammonia (NH3) and hydrochloric acid (HCl) using electrochemical impedance spectroscopy (EIS). Three types of sensors were fabricated using as-fabricated Si nanowires, nanowires treated with hydrofluoric acid (HF), and nanowires decorated with silver (Ag) nanoparticles. The best results were obtained with untreated Si nanowires, providing a detection limit of 4 μmol·L-1 for both HCl and NH3. Treatment with HF increased the adsorption sites and showed promise for detecting analyte content up to 1000 μmol·L-1. The study also explored the sensor response to NH3 and HCl vapors, using a dual parameter approach for qualitative analysis of gas mixture composition. These findings contribute to the development of highly sensitive sensors for health monitoring and selective detection of mixed analytes.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kyusung Kim, Sangwoo Chae, Pil Gyu Choi, Toshio Itoh, Nagahiro Saito, Yoshitake Masuda
Summary: ZnO nano-bullets were synthesized using solution plasma without any chemical agents, exhibiting high crystalline structure with (100) and (101) crystal facets, showing potential for applications in advanced technologies.
Article
Chemistry, Physical
Giorgos Boras, Xuezhe Yu, H. Aruni Fonseka, George Davis, Anton V. Velichko, James A. Gott, Haotian Zeng, Shiyao Wu, Patrick Parkinson, Xiulai Xu, David Mowbray, Ana M. Sanchez, Huiyun Liu
Summary: Self-catalyzed AlGaAs nanowires and AlGaAs/GaAs nanowires with quantum dots were successfully grown on Si substrates, showing strong room temperature photoluminescence and potential for applications in nanolasers and single-photon sources. The structural studies revealed the self-formation of an Al-rich AlGaAs shell with wide alloy fluctuations, while individual nanowires exhibited clear quantum dot behavior with spatially localized emission and narrow exciton line width.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Mary E. O'Kane, Joel A. Smith, Rachel C. Kilbride, Emma L. K. Spooner, Chris P. Duif, Thomas E. Catley, Adam L. Washington, Stephen M. King, Steven R. Parnell, Andrew J. Parnell
Summary: Tailoring the solution chemistry of metal halide perovskites requires understanding precursor aggregation and coordination. In this study, various scattering techniques were used to investigate the nanostructures in two different lead-halide perovskite solution inks. It was found that DLS can misrepresent the size distribution of the colloidal dispersion, while SANS/SESANS confirmed that these solutions mainly consist of 1-2 nm-sized particles.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Zhaoying Ding, Johannes C. Brouwer, Cees Kwakernaak, Marcel J. M. Hermans, Vera Popovich, Willem J. Quadakkers, Willem G. Sloof
Summary: Mo(AlxSi1-x)2 alloy with x in the range of 0.35-0.65 was prepared using a one-step spark plasma sintering method. Oxidation experiments were conducted at 1373 K in low and high oxygen partial pressure environments (10-14 and 0.21 atm) to investigate the exclusive formation of an alpha-Al2O3 scale. The oxidation kinetics followed a parabolic rate law, and the equiaxed and columnar grain growth was attributed to a counter-diffusion process of O and Al along grain boundaries of the Al2O3 scale. The formation of a dense equiaxed alpha-Al2O3 layer contributed to excellent oxidation resistance.
Article
Materials Science, Multidisciplinary
Utsav, Sakshum Khanna, Sagar Paneliya, Nisha Hiralal Makani, Indrajit Mukhopadhyay, Rupak Banerjee
Summary: Investigation of neck mediated restructuring of silica nanospheres in a single-layer via sintering results in the fabrication of size-tunable templates. The influence of physical dimensions and mixing ratios of the participating nanospheres on neck formation and assembly is explored. Quantification of the geometry, morphological properties, and sintering parameters of the thin films by particle radii, sintering duration, and mixing volume ratios is achieved.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Review
Materials Science, Multidisciplinary
Chuanlong Ma, Anton Nikiforov, Dirk Hegemann, Nathalie De Geyter, Rino Morent, Kostya (Ken) Ostrikov
Summary: This review presents recent advances in low-temperature plasma processing for controlling surface wettability. The underlying mechanisms, key features of fabrication processes, and water-surface interactions are discussed. It aims to guide further development of advanced functional materials.
INTERNATIONAL MATERIALS REVIEWS
(2023)
Article
Chemistry, Physical
Xin Zeng, Shuai Zhang, Xiucui Hu, Cheng Zhang, Kostya (Ken) Ostrikov, Tao Shao
Summary: With the increase in the greenhouse effect and reduction of fossil fuel resources, finding a feasible solution to directly convert power to chemicals using renewable energy is urgent. The power-to-chemicals approach, such as non-thermal plasma, electro-catalysis, and photo-catalysis, has shown great potential in the past two decades. This paper introduces the application of plasma technology in energy conversion, focusing on plasma-enabled ammonia synthesis and analyzing its state-of-the-art, mechanisms, and techno-economics. It emphasizes the importance of the power-to-chemicals approach in reducing carbon emissions and environmental pollution.
FARADAY DISCUSSIONS
(2023)
Article
Chemistry, Multidisciplinary
Amandeep Singh Pannu, Suvankar Sen, Xiaodong (Tony) Wang, Robert Jones, Kostya (Ken) Ostrikov, Prashant Sonar
Summary: Organic-inorganic hybrid lead trihalide perovskites have shown promise in various optoelectronic devices. Red-emitting perovskite-based LEDs have been less developed compared to green and blue ones. This study utilizes red-emitting 2D perovskites and carbon dots to create a stable composite material for red-emitting LEDs with improved performance.
Article
Nanoscience & Nanotechnology
Negar Zebardastan, Jonathan Bradford, Josh Lipton-Duffin, Jennifer MacLeod, Kostya (Ken) Ostrikov, Massimo Tomellini, Nunzio Motta
Summary: Face-to-face annealing is an effective method for obtaining epitaxial graphene with precise control over size, quality, growth rate and thickness.
Article
Physics, Fluids & Plasmas
Kun Liu, Wenqiang Geng, Xiongfeng Zhou, Qingsong Duan, Zhenfeng Zheng, Kostya (Ken) Ostrikov
Summary: Two modes of the atmospheric-pressure plasma discharge, characterized by the dominant O-3 and NO (x) species, were studied using numerical and experimental methods. A global chemical kinetics model was developed to investigate the mode transition mechanisms, and it accurately described the transition. The individual and synergistic effects of discharge energy and gas temperature on species density and the relative contributions of dominant reactions were quantified under increasing discharge voltage conditions.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Darwin Kurniawan, Jacob Mathew, Michael Ryan Rahardja, Hoang-Phuc Pham, Pei-Chun Wong, Neralla Vijayakameswara Rao, Kostya (Ken) Ostrikov, Wei-Hung Chiang
Summary: This study reports the development of smart anticancer drug nanocarriers through plasma engineering technique. The nanocarriers containing chitosan and nitrogen-doped graphene quantum dots can release drugs in a pH-responsive manner and exhibit enhanced toughness. The loaded nanocarriers demonstrate improved drug loading capability and stable release, showing great potential in cancer treatment.
Article
Chemistry, Multidisciplinary
Xin Zeng, Shuai Zhang, Yadi Liu, Xiucui Hu, Kostya Ken Ostrikov, Tao Shao
Summary: To meet global net-zero emission targets, sustainable and low-carbon alternatives are urgently needed for energy-intensive industrial processes like ammonia synthesis. In this study, plasma catalysis is used to achieve renewable-electricity-driven ammonia synthesis under mild conditions. By identifying energy loss pathways and optimizing process parameters, such as pulse voltage and gap distance, high ammonia yields with high energy efficiency and low emission footprint are obtained.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Rusen Zhou, Dejiang Zhou, Baowang Liu, Lanlan Nie, Yubin Xian, Tianqi Zhang, Renwu Zhou, Xinpei Lu, Kostya Ken Ostrikov, Patrick J. Cullen
Summary: The addition of helium can enhance the synthesis of ammonia by modifying the energy transfer mechanism in the plasma, leading to more efficient activation of N2 and production of NH3.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Review
Chemistry, Physical
Tianlai Xia, Yu Yang, Qiang Song, Mingchuan Luo, Mianqi Xue, Kostya (Ken) Ostrikov, Yong Zhao, Fengwang Li
Summary: Recently, electrocatalytic reactions involving oxygen, nitrogen, water, and carbon dioxide have been developed to produce clean energy, fuels, and chemicals. Understanding catalyst structures, active sites, and reaction mechanisms is crucial for improving performance. In this review, we summarize state-of-the-art in situ characterisation techniques used in electrocatalysis, categorizing them into microscopy, spectroscopy, and other techniques. We discuss the capacities and limits of these techniques to guide further advances in the field.
NANOSCALE HORIZONS
(2023)
Article
Physics, Multidisciplinary
Sanjib Sarkar, Jyoti K. Atul, Modhuchandra Laishram, Dandan Zou, Kostya (Ken) Ostrikov
Summary: The Farley-Buneman and Gradient Drift instabilities in a partially ionized dusty electrojet region were investigated using a fluid model. The effects of dissociative electron-ion recombination and dust charge fluctuation on the instabilities were considered. The dispersion relation describing the propagation of electrojet instabilities within the dust ion acoustic range in a magnetized partially ionized dusty plasma was solved numerically and analytically. The results showed that the Gradient Drift instability was unstable at a much longer wavelength compared to the Farley-Buneman instability. The threshold electron drift velocity for Farley-Buneman instability was affected by the charge on dust, with a decrease at lower altitudes and an increase at higher altitudes. Furthermore, the dissociative electron-ion recombination had a stronger damping effect than the dust charge fluctuation on both instabilities.
Article
Physics, Multidisciplinary
Christian Brand, Alfred Hucht, Giriraj Jnawali, Jonas D. Fortmann, Bjoern Sothmann, Hamid Mehdipour, Peter Kratzer, Ralf Schuetzhold, Michael Horn-von Hoegen
Summary: The coupling energies between buckled dimers on the Si(001) surface were determined through analysis of the anisotropic critical behavior of the order-disorder phase transition. The spot profiles in high-resolution low-energy electron diffraction were analyzed using the anisotropic two-dimensional Ising model. Effective couplings J11 = (-24.9 +/- 1.3) meV along the dimer rows and J perpendicular to = (-0.8 +/- 0.1) meV across the dimer rows, indicating antiferromagneticlike coupling of the dimers with c(4x2) symmetry.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Haotian Gao, Guoli Wang, Zhongzheng Huang, Lanlan Nie, Dawei Liu, Xinpei Lu, Guangyuan He, Kostya Ken Ostrikov
Summary: Nitrogen fixation is a crucial process for various biological and industrial processes, but it is also a major source of carbon emissions globally. In this study, a novel approach using plasma-activated mist (PAM) is proposed for efficient and sustainable nitrogen fixation. The PAM system generates nitrogen-fixation species through the reaction of air plasma and water mist, and the liquid-phase nitrogen fixation product is dominated by NO3-. This system is applied to deliver nitrogen-based nutrients directly to plant roots using an aeroponic system, leading to significant improvements in plant growth.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Qilei Xu, Qianqian Wu, Chenglin Wang, Xiumei Zhang, Zhengyang Cai, Liangliang Lin, Xiaofeng Gu, Kostya (Ken) Ostrikov, Haiyan Nan, Shaoqing Xiao
Summary: This study employed a two-step KI-assisted confined-space chemical vapor deposition method to prepare multilayer WSe2/SnS2 p-n heterojunctions. The optical characterization and electrical tests revealed clear interfaces and vertical heterostructures, as well as good rectification characteristics and high photoresponse. These performances are likely attributed to the ultra-low dark current generated in the depletion region and the high direct tunneling current during illumination.
Article
Chemistry, Multidisciplinary
Hsiuan Ling Ho, Jung Yen Yang, Chun Hung Lin, Jiann Shieh, Yu Fang Huang, Yi Hong Ho, Tsung Shine Ko, Chiung Chih Hsu, Kostya (Ken) Ostrikov
Summary: The development of reliable and cost-effective molecular detection at the attomolar level on analyte-immobilizing surfaces without lithographic patterning is a challenge in chemical sensing. This study presents a novel approach using plasma etching to produce custom-designed adhesive superhydrophobic silicon nanograss surfaces. These surfaces enable effective immobilization of Ag nanoparticles and R6G target molecules, providing a reliable Raman scattering platform for detecting trace analytes. The study also introduces a plasma-enabled approach for precise interface nanostructuring, potentially leading to unprecedented capabilities in molecular-level sensing technologies.
ADVANCED MATERIALS INTERFACES
(2023)
Review
Chemistry, Multidisciplinary
Jinyong Lin, Dong Li, Changhong Li, Ziqi Zhuang, Chengchao Chu, Kostya (Ken) Ostrikov, Erik W. W. Thompson, Gang Liu, Peiyu Wang
Summary: Cancer cells are more susceptible to oxidative stress and nanomaterials-based therapies that generate reactive oxygen species (ROS) have been effective in eliminating cancer cells. These therapies, including chemodynamic therapy, photodynamic therapy, sonodynamic therapy, as well as multi-modal therapies such as combination therapy, have shown significant inhibition of tumor growth. However, the limitations of multi-modal therapy in material preparation and operation protocols hinder its clinical application. Cold atmospheric plasma (CAP), as a reliable source of ROS, light, and electromagnetic fields, provides a simple alternative for implementing multi-modal treatments. Therefore, the emerging field of tumor precision medicine is expected to benefit from these promising multi-modal therapies based on ROS-generating nanomaterials and reactive media like CAPs.
