Article
Construction & Building Technology
Jialiang Wang, Sufen Dong, Zhenming Li, Mustafa Sahmaran, Siqi Ding, Baoguo Han
Summary: The addition of nano-BN can fundamentally modify the micro-and even nano-structures of cementitious composites, improving their anti-impact property and dynamic mechanical behavior. By refining the pore structure of the composite matrix and enhancing the micromechanical properties of hydration products, nano-BN enhances the energy absorption capacity of the composites at the macro level. Additionally, nano-BN inhibits the damage of cementitious composites, with its inhibition form changing with the strain rate.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Heng Wang, Haoran Yang, Yongzhi Peng, Yulin Zheng, Dongying Huang, Pu Hu, Yawei Li, Zhengyi Fu
Summary: High-purity and high-yield boron nitride nanotubes with a large aspect ratio were successfully synthesized using a two-step process. The catalyst content and annealing temperature were found to influence the phase composition and microstructure of the products. Highly crystalline boron nitride nanotubes were obtained at appropriate temperatures.
JOURNAL OF MATERIOMICS
(2022)
Article
Materials Science, Multidisciplinary
Hongyu Zhang, Jijiang He, Weike Zhang, Ivano E. Castelli, Martin Saunders, Jeffrey M. Gordon, Hui Tong Chua
Summary: The generation of boron nitride nano-onions (BNNOs) from hexagonal-BN crystallite powder via a one-pot, non-toxic, catalyst-free, rapid hightemperature lamp ablation procedure is reported. Characterization procedures revealed the shapes, sizes, and composition of the nanoparticles, and a formation mechanism for BNNOs is proposed. Temperature measurements also showed the viable temperature range for BNNO generation.
Article
Chemistry, Multidisciplinary
Yanjiao Li, Xueren Wang, Jian Wang, Xinfeng Wang, Dejun Zeng
Summary: A coral-like boron nitride (BN) micro-/nanostructure was synthesized from B2O3 using a ball milling and annealing process catalyzed by Fe. The structure consists of bamboo-shaped BN nanotubes as the stem and h-BN nanoflakes growing outward on the surface of the nanotube. The morphology of the BN nanotube was found to be dependent on the annealing time, developing from smooth nanotubes to rough, coral-like structures.
Article
Chemistry, Physical
Szymon Senyk, Arkadiusz Chodkiewicz, Krzysztof Gocman, Barbara Szczesniak, Tadeusz Kaldonski
Summary: The article discusses the use of hexagonal boron nitride as an additive to lubricants. Factors determining its application were identified through research and the properties of four types of h-BN were analyzed. The study found that the use of h-BN nanoparticles as lubricants is promising.
Article
Materials Science, Multidisciplinary
Atefe Farahani, Masoud Jamshidi, Masumeh Foroutan
Summary: In this study, boron nitride nano sheets (BNNSs) were successfully prepared by exfoliation using mono ethylene glycol (MEG) as an exfoliating agent. The use of MEG resulted in higher yield and thinner nanosheets compared to the use of isopropyl alcohol (IPA)/water mixture. Silicon rubber nanocomposites containing pure and exfoliated BNNSs showed improved thermal and electrical performances. Exfoliated-BNNSs exhibited significantly higher thermal conductivity and electrical volume resistivity compared to pure BNNSs.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Physical
Junkai Ren, Luigi Stagi, Luca Malfatti, Carlo Maria Carbonaro, Gaetano Granozzi, Laura Calvillo, Sebastiano Garroni, Stefano Enzo, Plinio Innocenzi
Summary: Hexagonal boron nitride (h-BN) nanodots of 10 nm have been successfully synthesized via top-down route, showing fluorescent emissions in both the UV and visible regions. Experimental results suggest that a specific combination of treatments is crucial for achieving UV emission, and quantum chemistry calculations indicate that Stones-Wales defects may be possible causes of the optical and vibrational properties.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Atefe Farahani, Masumeh Foroutan, Masoud Jamshidi, Mahnaz Sababkar, Ahmad Boudaghi
Summary: The thermal conductivity of hexagonal structures of boron nitride and borophene was investigated using reactive molecular dynamics simulation. The effect of boron and nitrogen in the hexagonal structure was studied by creating five other hypothetical structures. The TC of these structures was calculated and compared with literature values. It was found that the stability of structures influenced their thermal conductivity, and differences in partial charge affected heat transfer.
Article
Physics, Applied
Takatoshi Yamada, Tomoaki Masuzawa, Yuki Okigawa
Summary: To enhance the carrier mobility and suppress the intrinsic carrier density of graphene on a silicon dioxide substrate, a potassium-doped nano graphene intermediate layer was introduced. Electrical properties of the fabricated graphene field-effect transistors were measured, and the results showed a shift in the Dirac point and increased carrier density and mobility. The ionized potassium atoms in the intermediate layer shielded the electric force from the negatively charged impurities, resulting in improved field-effect mobilities.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Jiakun Wu, Haikuo. Wang, Chao Wang, Zhicai Zhang, Yao Tang, Zhiqiang Hou, Shun Wan, Dazhuan Wu, Zhongjun Tan, Xiaoping Ouyang
Summary: In this paper, Al2O3-cBN-hBN self-lubricating material was designed and the mechanical and thermal properties of the composites were improved by adding cBN particles. However, excessive volume fraction of cBN can lead to a truss effect that reduces pressure transfer efficiency. Different hBN content can change the wear mechanism, and the large modulus difference between cBN and hBN enhances the release efficiency of hBN particles.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Ceramics
Suna Avcioglu, Figen Kaya, Cengiz Kaya
Summary: A novel non-catalytic sol-gel route was used to synthesize nano/micro boron carbide fibers by manipulating the growth kinetics of boron carbide particles through in-situ decoration with boric acid crystals during thermal decomposition. This approach successfully produced highly crystalline boron carbide particles and various morphologies of boron carbide, such as rhomboid-plate, nanobelt, and fiber. By tailoring the structure of the preceramic precursor, the formation of boron carbide fiber was increased while polyhedral-equiaxed particles were decreased in the final products.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Biomaterials
Ganit Indech, Lidor Geri, Chen Mordechai, Yarden Ben Moshe, Yitzhak Mastai, Orit Shefi, Amos Sharoni
Summary: Micro- and nano-particles are essential for various current and emerging technologies, particularly in biological studies and applications. Recent developments have led to multifunctional particles that can enhance their effectiveness and enable novel applications. However, conventional fabrication methods for particles are time-consuming and challenging to fine-tune for multifunctional applications. In this study, a simple and facile method for fabricating dome-shaped micron- and nano-sized particles was presented, which allows for the engineering of multifunctional particles with pre-defined properties for specific biological applications.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Materials Science, Multidisciplinary
Sepideh Soltani, Hajar Ghanbari, S. Mohammad Mirkazemi
Summary: In this study, h-BN and r-BN structures were synthesized through controlled nitridation. The h-BN exhibited sheet-like morphology, while the r-BN formed needle-like hollow structures.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Nanoscience & Nanotechnology
Shengqian Ma, Jingfang Tan, Xiaomei Wu
Summary: The structures and properties of nano-XNH2 (X = C, Si, Ge, and Sn) were investigated using Density Functional Theory (DFT). Elastic strain and width were introduced to explore the nano-XNH2 nanosheets and nanoribbons. The study found that the bandgaps of these materials can be easily modulated, indicating great potential applications of nano-XNH2 in stress sensors and electronic and optoelectronic devices.
Article
Chemistry, Inorganic & Nuclear
GeonHo Baek, Seunghwan Lee, Hye-mi Kim, Su Hwan Choi, Jin-Seong Park
Summary: In this study, organic/inorganic hybrid tincone films were fabricated using molecular layer deposition (MLD) with N,N'-tert-butyl-1,1-dimethylethylenediamine stannylene(ii) as a precursor and hydroquinone (HQ) as an organic reactant. The structural rearrangement of SnO and benzene ring bonds occurred during vacuum post-annealing, resulting in a SnO-based hybrid 2D structure achieved through pi-pi stacking of the benzene ring rather than pyrolysis. The mechanism of fabrication and increase in crystallinity of SnO after annealing was investigated using various analytical techniques.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Abu Talha Aqueel Ahmed, Sankar Sekar, Shubhangi S. Khadtare, Nurul Taufiqu Rochman, Bathula Chinna, Abu Saad Ansari
Summary: In this study, MnCo2S4 nanosheet catalyst was successfully synthesized and found to exhibit superior performance in hydrogen evolution. Compared to MnCo2S4, MnCo2S4 showed low overpotentials, moderate Tafel slope, and excellent sustainability. The outstanding performance can be attributed to the increased number of electrochemically active sites and enhanced electronic conductivity on the catalyst surface.
Article
Chemistry, Multidisciplinary
Victor V. Maltsev, Elena A. Volkova, Elizaveta V. Koporulina, Diana D. Mitina, Vladimir L. Kosorukov, Anna I. Jiliaeva, Daniil A. Naprasnikov, Konstantin N. Gorbachenya, Viktor E. Kisel
Summary: The phase relationships, crystal properties and luminescence kinetics of two complex systems were studied, including unit cell parameters, segregation coefficients of impurities, and lifetimes of energy levels.
Article
Chemistry, Multidisciplinary
Xiaoman Zhang, Wangwang Xu, W. J. Meng, Andrew C. Meng
Summary: This study successfully grew high-quality single crystal AlScN nanowires through ultra-high vacuum reactive sputtering technique and characterized their structure and properties. The nanowires exhibit significantly reduced mosaic spread and predominantly single ferroelectric domains, as well as a high piezoelectric constant.
Article
Chemistry, Multidisciplinary
Tom E. de Vries, Elias Vlieg, Rene de Gelder
Summary: Networks are important for describing relationships between people, roads between cities, reactions between chemicals, and other interactions. Bipartiteness, dividing the network into two groups, can facilitate the study of the network's structure. We have developed an algorithm that can find a near-optimal bipartisation within a reasonable time frame and used it to uncover the hidden structure of the CSD cocrystal network.
Article
Chemistry, Multidisciplinary
Chuchu Han, Jing Yang, Xin Zhang, Aisen Li, Jiang Peng
Summary: An elastic crystal based on a photo-reactive acylhydrazone derivative is reported, which exhibits reversible bending behavior under UV irradiation and heating. The crystal undergoes reversible E<->Z isomerization under light and heating conditions. The crystal demonstrates excellent elastic properties and the bending can be controlled to control the output direction of red light.
Article
Chemistry, Multidisciplinary
Lingfeng Zhang, Yu Wang, Yefeng Wang, Shuai Liu, Na Zhang, Mingmin Yang, Haixia Ma, Zhaoqi Guo
Summary: This study designs and synthesizes a series of high-energy salts compounds without heavy metal ions and azide groups. The molecular structures and stability of the compounds are confirmed through single-crystal X-ray diffraction and intermolecular interaction analysis. Furthermore, the thermal stability, energetic properties, and electrical initiation properties of the compounds are investigated, suggesting their potential as primary explosives.
