Science

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• Stereomicrostructure-regulated biodegradable adhesives AI翻译
  作者：Zhang, Zhen; Quinn, Ethan C.; Kenny, Jacob K.; Grigoropoulos, Alexandra; DesVeaux, Jason S.; Chen, Tiffany; Zhou, Li; Xu, Ting; Beckham, Gregg T.; Chen, Eugene Y. -X.
  作者单位：Colorado State University System; Colorado State University Fort Collins; United States Department of Energy (DOE); National Renewable Energy Laboratory - USA; University of California System; University of California Berkeley; University of California System; University of California Berkeley; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory; South China University of Technology
  摘要：Commercial adhesives are petroleum-based thermoset networks or nonbiodegradable thermoplastic hot melts, making them ideal targets for replacement by biodegradable alternatives. Poly(3-hydroxybutyrate) (P3HB) is a biorenewable and biodegradable alternative to conventional plastics, but microbial P3HB, which has a stereoperfect stereomicrostructure, exhibits no adhesion. In this study, by elucidating the fundamental relationship between chemocatalytically engineered P3HB stereomicrostructures a...
• Dogs sniff out truffles-in the name of science AI翻译
  作者：Wilcox, Christie
  摘要：Their keen noses are helping researchers uncover the diversity of the Pacific Northwest's underground fungi
• Charting the changing sky AI翻译
  作者：Brainard, Jeffrey; Servick, Kelly
• Endurance beyond 10 billion cycles in wurtzite ferroelectrics by confining nitrogen vacancies AI翻译
  作者：Wang, Ruiqing; Zhu, Feng; Qian, Haoji; Zhou, Jiuren; Sun, Wenxin; Zheng, Siying; Chen, Jiajia; Li, Bochang; Liu, Yan; Zhou, Peng; Hao, Yue; Han, Genquan
  作者单位：Xidian University; City University of Hong Kong; Xidian University; Fudan University
  摘要：Wurtzite ferroelectrics could provide a route to wafer-scale integrated ferroelectric memories but are limited by endurance, typically failing at similar to 10(8) cycles. We identified nitrogen-vacancy (V-N) clustering and long-range percolative migration as the defect-mediated pathways that drive leakage-current growth and dielectric breakdown. We combined a spatially engineered aluminum scandium nitride/aluminum nitride (AlScN/AlN) superlattice with a dynamic recovery protocol to spatially a...
• Preferred synthesis of armchair transition metal dichalcogenide nanotubes AI翻译
  作者：Abid; Zhao, Luneng; Huang, Ju; Zheng, Yongjia; Sato, Yuta; Wang, Tianyu; Levshov, Dmitry; Wang, Lingfeng; Sun, Haiming; Lin, Qingyun; Han, Zhen; Yang, Chunxia; Nduwarugira, Bill Herve; Ma, Yicheng; Zheng, Yige; Wang, Hang; Ullah, Salman; Khan, Afzal; Zhang, Qi; Li, Wenbin; Gao, Junfeng; Ju, Bingfeng; Ding, Feng; Li, Yan; Herrebout, Wouter; Suenaga, Kazu; Maruyama, Shigeo; Yang, Huayong; Xiang, Rong
  作者单位：Zhejiang University; Dalian University of Technology; Westlake University; Westlake University; National Institute of Advanced Industrial Science & Technology (AIST); University of Antwerp; University of Antwerp; University of Antwerp; Zhejiang University; Peking University; Hangzhou Dianzi University; Suzhou Laboratory; University of Tokyo; Nagoya University
  摘要：Nanotubes represent an important class of crystalline materials, but controlling their structures, particularly chiralities, remains a fundamental challenge. In this work, we report a strategy for synthesizing transition metal dichalcogenide nanotubes with preferred armchair chirality. Tin disulfide, molybdenum disulfide, and tungsten disulfide nanotubes were formed with high yield and structural purity inside boron nitride nanotube channels. Atomic-resolution imaging, electron diffraction, an...
• Laser Mössbauer spectroscopy of 229Th in CaF2 AI翻译
  作者：Hiraki, Takahiro; Masuda, Takahiko; Takatori, Sayuri; Schaden, Fabian; Bartokos, Michael; Beeks, Kjeld; Fukunaga, Yuta; Gruneis, Andreas; Guan, Ming; Kazakov, Georgy; LaGrange, Thomas; Leitner, Adrian; Morawetz, Ira; Ogake, Ryoichiro; Okai, Koichi; Pimon, Martin; Pressler, Martin; Riebner, Thomas; Sasao, Noboru; Schneider, Felix; Schumm, Thorsten; Shimizu, Kotaro; de Col, Luca Toscani; Sikorsky, Tomas; Yoshimi, Akihiro; Yoshimura, Koji
  作者单位：Okayama University; Technische Universitat Wien; Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne; Charles University Prague
  摘要：M & ouml;ssbauer spectroscopy is widely used in chemistry, geology, and solid-state physics to probe the local physical and chemical environment of nuclei in materials. Here, we extended this technique into the optical range using a vacuum ultraviolet laser to probe the low-energy nuclear transitions of thorium-229 (229Th) doped in calcium fluoride (CaF2) crystals. We discovered four distinct doping sites for the thorium ions, determined the characteristic electric field gradients emerging fro...
• A thalamocortical circuit encoding deviations from sensory history AI翻译
  作者：Leow, Yi Ning; Natesan, Arundhati; Barlowe, Alexandria; Ahrlund-Richter, Sofie; Luo, Tianyu (Cindy); Jazayeri, Mehrdad; Sur, Mriganka
  作者单位：Massachusetts Institute of Technology (MIT); Massachusetts Institute of Technology (MIT); Agency for Science Technology & Research (A*STAR); A*STAR - Institute of Molecular & Cell Biology (IMCB); Massachusetts Institute of Technology (MIT)
  摘要：Prior expectations guide attention and support perceptual filtering during decision-making. In mice performing a visual discrimination task, choices depended on trial-by-trial differences between consecutive stimuli (|Delta Dir|). We hypothesized that thalamic lateral posterior (LP; rodent pulvinar) projections to prefrontal areas such as the anterior cingulate cortex (ACC), previously implicated in selective attention and predictive processing, could support history-dependent evaluation of cu...
• China's cordgrass removal increases erosion AI翻译
  作者：Zhang, Wei; Li, Hao
  作者单位：Hohai University
• Dynamic asymmetric strain imprinted into substrates by an oxide thin film AI翻译
  作者：Kisiel, Elliot; Pofelski, Alexandre; Salev, Pavel; Qiu, Erbin; Reisbick, Spencer; Liu, Chuhang; Glatz, Andreas; Poudyal, Ishwor; He, Wei; Basak, Rourav; Yay, Kaan Alp; Li, Junjie; Patel, Umeshkumar; Zhang, Zhan; Last, Arndt; Zhu, Yimei; Schuller, Ivan K.; Islam, Zahir; Frano, Alex
  作者单位：University of California System; University of California San Diego; United States Department of Energy (DOE); Argonne National Laboratory; United States Department of Energy (DOE); Brookhaven National Laboratory; University of Denver; United States Department of Energy (DOE); Argonne National Laboratory; Stanford University; Stanford University; United States Department of Energy (DOE); Stanford University; SLAC National Accelerator Laboratory; Helmholtz Association; Karlsruhe Institute of Technology
  摘要：In film-substrate systems, the substrate role is often considered to be limited to providing static mechanical constraints. Dynamic film-substrate interactions when a structural change in the film modifies the substrate are generally disregarded. Using combined x-ray and electron microscopies, we observed that an electrically induced filament in a vanadium dioxide film created strong asymmetric strain in an underlying sapphire substrate. This asymmetric substrate strain fed back into the film ...
• Seafood biosecurity gaps threaten biodiversity AI翻译
  作者：Maboloc, Elizaldy Acebu; Fang, James Kar-Hei
  作者单位：Hong Kong Polytechnic University; City University of Hong Kong; Hong Kong Polytechnic University