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Instantaneous rock transformations in the deep crust driven by reactive fluid flow 期刊论文
NATURE GEOSCIENCE, 2020, 13 (4) : 307-+
作者:  Beinlich, A.;  John, T.;  Vrijmoed, J. C.;  Tominaga, M.;  Magna, T.;  Podladchikov, Y. Y.
收藏  |  浏览/下载：3/0  |  提交时间：2020/05/13
Wafer-scale single-crystal hexagonal boron nitride monolayers on Cu (111) 期刊论文
NATURE, 2020, 579 (7798) : 219-+
作者:  Luong, Duy X.;  Bets, Ksenia V.;  Algozeeb, Wala Ali;  Stanford, Michael G.;  Kittrell, Carter;  Chen, Weiyin;  Salvatierra, Rodrigo V.;  Ren, Muqing;  McHugh, Emily A.;  Advincula, Paul A.;  Wang, Zhe;  Bhatt, Mahesh;  Guo, Hua;  Mancevski, Vladimir;  Shahsavari, Rouzbeh
收藏  |  浏览/下载：81/0  |  提交时间：2020/07/03

Ultrathin two-dimensional (2D) semiconducting layered materials offer great potential for extending Moore'  s law of the number of transistors in an integrated circuit(1). One key challenge with 2D semiconductors is to avoid the formation of charge scattering and trap sites from adjacent dielectrics. An insulating van der Waals layer of hexagonal boron nitride (hBN) provides an excellent interface dielectric, efficiently reducing charge scattering(2,3). Recent studies have shown the growth of single-crystal hBN films on molten gold surfaces(4) or bulk copper foils(5). However, the use of molten gold is not favoured by industry, owing to its high cost, cross-contamination and potential issues of process control and scalability. Copper foils might be suitable for roll-to-roll processes, but are unlikely to be compatible with advanced microelectronic fabrication on wafers. Thus, a reliable way of growing single-crystal hBN films directly on wafers would contribute to the broad adoption of 2D layered materials in industry. Previous attempts to grow hBN monolayers on Cu (111) metals have failed to achieve mono-orientation, resulting in unwanted grain boundaries when the layers merge into films(6,7). Growing single-crystal hBN on such high-symmetry surface planes as Cu (111)(5,8) is widely believed to be impossible, even in theory. Nonetheless, here we report the successful epitaxial growth of single-crystal hBN monolayers on a Cu (111) thin film across a two-inch c-plane sapphire wafer. This surprising result is corroborated by our first-principles calculations, suggesting that the epitaxial growth is enhanced by lateral docking of hBN to Cu (111) steps, ensuring the mono-orientation of hBN monolayers. The obtained single-crystal hBN, incorporated as an interface layer between molybdenum disulfide and hafnium dioxide in a bottom-gate configuration, enhanced the electrical performance of transistors. This reliable approach to producing wafer-scale single-crystal hBN paves the way to future 2D electronics.


  
Facies and architecture of riverdominated to tide-influenced mouth bars in the lower Lajas Formation (Jurassic), Argentina 期刊论文
AAPG BULLETIN, 2018, 102 (5) : 885-912
作者:  Kurcinka, Colleen;  Dalrymple, Robert W.;  Gugliotta, Marcella
收藏  |  浏览/下载：0/0  |  提交时间：2019/04/09
Sedimentary characteristics and origin of lacustrine organic-rich shales in the salinized Eocene Dongying Depression 期刊论文
GEOLOGICAL SOCIETY OF AMERICA BULLETIN, 2018, 130: 154-174
作者:  Liang, Chao;  Jiang, Zaixing;  Cao, Yingchang;  Wu, Jing;  Wang, Yongshi;  Hao, Fang
收藏  |  浏览/下载：14/0  |  提交时间：2019/04/09
Fluid-driven metamorphism of the continental crust governed by nanoscale fluid flow 期刊论文
NATURE GEOSCIENCE, 2017, 10 (9)
作者:  Plumper, Oliver;  Botan, Alexandru;  Los, Catharina;  Liu, Yang;  Malthe-Sorenssen, Anders;  Jamtveit, Bjorn
收藏  |  浏览/下载：6/0  |  提交时间：2019/04/09