Article
Chemistry, Multidisciplinary
Eugenio Calandrini, Kirill Voronin, Osman Balci, Maria Barra-Burillo, Andrei Bylinkin, Sachin M. Shinde, Subash Sharma, Felix Casanova, Luis E. Hueso, Andrei Chuvilin, Clifford Mcaleese, Ben R. Conran, Xiaochen Wang, Kenneth Teo, Valentyn S. Volkov, Andrea C. Ferrari, Alexey Y. Nikitin, Rainer Hillenbrand
Summary: This work reports the observation of phonon polaritons (PhPs) in wafer-scale multilayer hexagonal boron nitride (hBN) grown by chemical vapor deposition. PhPs are visualized using infrared nanoimaging, and their lifetimes are measured. PhP nanoresonators are also demonstrated. These results are of significant importance for applications in infrared spectroscopy and photodetectors based on PhPs.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Max Franck, Jaroslaw Dabrowski, Markus Andreas Schubert, Christian Wenger, Mindaugas Lukosius
Summary: In this study, the growth of hexagonal boron nitride (hBN) on epitaxial Ge(001)/Si substrates using high-vacuum chemical vapor deposition from borazine was systematically investigated for the first time. The research findings suggest that the process pressure and growth temperature have certain influences on the morphology, growth rate, and crystalline quality of hBN films.
Review
Chemistry, Multidisciplinary
Jia Zhang, Biying Tan, Xin Zhang, Feng Gao, Yunxia Hu, Lifeng Wang, Xiaoming Duan, Zhihua Yang, PingAn Hu
Summary: Atomically thin hexagonal boron nitride (h-BN) is a promising 2D material with unique properties for applications in optoelectronics and electronics. Chemical vapor deposition (CVD) is considered a promising method for producing large-scale, high-quality h-BN films and heterostructures. The epitaxial growth of 2D materials onto h-BN and building heterostructures can lead to novel properties.
ADVANCED MATERIALS
(2021)
Article
Physics, Applied
Rong Fan, Qiuyan Chen, Zongping Chen
Summary: In this study, the role of the edge during the growth of hexagonal boron nitride (hBN) by chemical vapor deposition (CVD) was investigated. The researchers demonstrated two types of hydrogen-induced edge evolution of single-crystal hBN domains over time on liquid Cu via CVD. The results were well explained by the kinetic Wulff construction theory and provide insights into the production of large-scale single-crystalline hBN.
APPLIED PHYSICS EXPRESS
(2022)
Article
Materials Science, Multidisciplinary
Hisashi Yamada, Sho Inotsume, Naoto Kumagai, Toshikazu Yamada, Mitsuaki Shimizu
Summary: Two different boron precursors, diborane and trimethyl boron, were investigated for h-BN growth, with the BN layer grown using TMB containing a higher amount of carbon atoms and exhibiting turbostratic BN structure compared to that grown using B2H6. The Raman peak frequencies and widths indicate that TMB induces a larger compressive strain and prevents the formation of highly crystalline h-BN thin films.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Gaokai Wang, Jidong Huang, Siyu Zhang, Junhua Meng, Jingren Chen, Yiming Shi, Ji Jiang, Jingzhen Li, Yong Cheng, Libin Zeng, Zhigang Yin, Xingwang Zhang
Summary: A facile submicron-spacing vapor deposition (SSVD) method is reported for growing wafer-scale single crystal h-BN layers with controllable thickness on sapphire substrates. The epitaxial h-BN layer shows high crystalline quality and is demonstrated to have potential applications in a deep ultraviolet photodetector and a ZrS2/h-BN heterostructure. This method provides a promising path towards future 2D semiconductor-based electronics and optoelectronics.
Article
Chemistry, Multidisciplinary
Ji-Hoon Park, Ang-Yu Lu, Mohammad Mahdi Tavakoli, Na Yeon Kim, Ming-Hui Chiu, Hongwei Liu, Tianyi Zhang, Zhien Wang, Jiangtao Wang, Luiz Gustavo Pimenta Martins, Zhengtang Luo, Miaofang Chi, Jianwei Miao, Jing Kong
Summary: Wafer-scale monolayer two-dimensional (2D) materials have been achieved through epitaxial chemical vapor deposition (CVD) in recent years. To scale up the synthesis of 2D materials, a comprehensive analysis of the growth dynamics and its dependence on the growth parameters is important. However, most studies on CVD-grown 2D materials have considered each parameter as an independent variable, which is not comprehensive for growth optimization. In this study, monolayer hexagonal boron nitride (hBN) was synthesized on single-crystalline Cu(111) using CVD, and the growth parameters were varied to regulate hBN domain sizes. The correlation between two growth parameters was explored, and a more comprehensive understanding of the growth mechanism for 2D materials was provided through machine learning.
Article
Materials Science, Multidisciplinary
Yajuan Zhao, Xiang Li, Liangliang Feng, Tianmeng Liu, Haolin Wang
Summary: In this study, large-area bilayer hexagonal boron nitride (h-BN) was selectively grown using a two-step chemical vapor deposition (CVD) approach. By constructing a confined space in the Cu foils/sapphire stack, controlled synthesis of bilayer h-BN was achieved. Systematic characterization confirmed the formation of bilayer h-BN and the mechanism of CVD growth was studied. In situ annealing between the two steps was found to efficiently facilitate the selective growth, and the local oxidation and reduction process created preferred nucleation sites for uniform bilayer h-BN. These results enhance the understanding of the synthesis mechanism and provide a foundation for controllable synthesis of high-quality h-BN.
Article
Chemistry, Physical
Yajuan Zhao, Zhaohui Zhang, Jianfeng Huang, Liangliang Feng, Liyun Cao, Xiang Li, Tianmeng Liu, Qijun Zong, Haolin Wang
Summary: This study successfully constructs monolayer tungsten disulfide on hexagonal boron nitride using chemical vapor deposition, and demonstrates improved optical and electrical properties compared to those on silicon substrates. Additionally, the study highlights the important role of salt in building the heterobilayer structure.
APPLIED SURFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Le Yu, Pei Lay Yap, Diana N. H. Tran, Alexandre M. C. Santos, Dusan Losic
Summary: This study presents a high-yield, low-cost, and energy-efficient wet chemical exfoliation strategy to produce edge-functionalized hBN nanosheets with uniform size, which is confirmed by various characterization techniques. This optimized preparation paves a promising pathway for effectively producing hBN through a cost-efficient exfoliation approach.
Article
Engineering, Environmental
Tingjie Chen, Zhiyong Liu, Xiaokang Hu, Gang Zhao, Zipeng Qin, John Tosin Aladejana, Xiangfang Peng, Yongqun Xie, Binghui Wu
Summary: Renewable and biodegradable plant fiber sponges (PFS) can be improved by modifying them with a highly thermo-conductive hexagonal boron nitride (h-BN) ink as a fire retardant. The modified PFS@h-BN show enhanced fire resistance, reduced smoke release, and improved mechanical performance, making them a promising material for safe and energy-efficient building applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Ceramics
Virginia E. Collier, Wenbo Xu, Robert M. McMeeking, Frank W. Zok, Matthew R. Begley
Summary: The mechanical response of ceramic matrix composites is significantly influenced by slip along the matrix-fiber interface, typically achieved through thin coatings on fibers. This paper presents models quantifying the effects of environmental attack on these coatings through matrix cracks, with a focus on recession lengths and competing volatilization and oxidation rates. Findings show that recession behaviors are highly sensitive to water vapor and temperature, with a competition between volatilization and oxidation controlling the extent of recession.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Heloise Delpouve, Gerald Camus, Stephane Jouannigot, Bruno Humez, Herve Plaisantin, Claudie Josse, Sylvain Jacques
Summary: SiC/BN/SiC-Si single-ply composites with Hi-Nicalon S(TM) fibres were synthesized. The interfacial shear stress measured by fibre push-out test is significantly higher when the crystallization degree of the BN interphase is low. The cracks observed in the composite with different microscopy techniques are also less long and open.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Multidisciplinary Sciences
Na Ni, Binbin Wu, Yinchun Shi, Xiaohui Fan, Chuanwei Li
Summary: A unidirectional SiCf/SiC minicomposite with a scheelite (CaWO4) interphase coating was fabricated through the precursor infiltration and pyrolysis method. The CaWO4 interphase was found to provide weak fiber/matrix bonding and the interfacial debonding stress was estimated. In-situ tensile SEM observation and investigation of thermal compatibility after heat treatment were conducted.
SCIENTIFIC REPORTS
(2022)
Article
Nanoscience & Nanotechnology
Vidur Raj, Dipankar Chugh, Lachlan E. Black, M. M. Shehata, Li Li, Felipe Kremer, Daniel H. Macdonald, Hark Hoe Tan, Chennupati Jagadish
Summary: Research has shown that wafer-scale, few monolayers thick hBN as a passivation layer can significantly improve solar cell performance, with a relatively low interface defect density and potential for high-quality passivation. hBN-based passivation layers are especially useful in cases where the growth of lattice-matched passivation layers is complicated.
NPJ 2D MATERIALS AND APPLICATIONS
(2021)
